/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 SingleStatement --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=WIDEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-lit/cggmp2005b.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 03:28:09,609 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 03:28:09,612 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 03:28:09,640 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 03:28:09,640 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 03:28:09,642 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 03:28:09,643 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 03:28:09,645 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 03:28:09,647 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 03:28:09,648 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 03:28:09,649 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 03:28:09,650 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 03:28:09,650 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 03:28:09,651 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 03:28:09,653 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 03:28:09,654 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 03:28:09,655 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 03:28:09,656 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 03:28:09,658 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 03:28:09,660 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 03:28:09,662 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 03:28:09,663 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 03:28:09,665 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 03:28:09,666 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 03:28:09,668 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 03:28:09,669 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 03:28:09,669 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 03:28:09,670 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 03:28:09,670 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 03:28:09,671 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 03:28:09,672 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 03:28:09,673 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 03:28:09,673 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 03:28:09,674 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 03:28:09,676 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 03:28:09,676 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 03:28:09,677 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 03:28:09,677 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 03:28:09,677 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 03:28:09,678 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 03:28:09,679 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 03:28:09,680 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 [2020-09-25 03:28:09,707 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 03:28:09,707 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 03:28:09,709 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 03:28:09,709 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 03:28:09,709 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 03:28:09,709 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 03:28:09,709 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 03:28:09,710 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 03:28:09,710 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 03:28:09,710 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 03:28:09,710 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 03:28:09,711 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 03:28:09,711 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 03:28:09,711 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 03:28:09,711 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 03:28:09,711 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 03:28:09,712 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 03:28:09,712 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 03:28:09,712 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 03:28:09,712 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 03:28:09,712 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 03:28:09,713 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 03:28:09,713 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 03:28:09,713 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 03:28:09,713 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 03:28:09,713 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 03:28:09,714 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 03:28:09,714 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 03:28:09,714 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 03:28:09,714 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 -> SingleStatement 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=WIDEST;log-additional-information=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=WIDEST;log-additional-information=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=WIDEST;log-additional-information=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=WIDEST;log-additional-information=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=WIDEST;log-additional-information=true; [2020-09-25 03:28:10,160 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 03:28:10,177 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 03:28:10,182 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 03:28:10,183 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 03:28:10,184 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 03:28:10,185 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/cggmp2005b.i [2020-09-25 03:28:10,278 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/50f3c1422/cc5da6d468224ed38ae6376373e57d2d/FLAGff3dad3c3 [2020-09-25 03:28:10,811 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 03:28:10,812 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-lit/cggmp2005b.i [2020-09-25 03:28:10,821 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/50f3c1422/cc5da6d468224ed38ae6376373e57d2d/FLAGff3dad3c3 [2020-09-25 03:28:11,153 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/50f3c1422/cc5da6d468224ed38ae6376373e57d2d [2020-09-25 03:28:11,165 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 03:28:11,172 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 03:28:11,176 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 03:28:11,176 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 03:28:11,180 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 03:28:11,181 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 03:28:11" (1/1) ... [2020-09-25 03:28:11,185 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3c1aada5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 03:28:11, skipping insertion in model container [2020-09-25 03:28:11,186 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 03:28:11" (1/1) ... [2020-09-25 03:28:11,196 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 03:28:11,221 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 03:28:11,437 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 03:28:11,444 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 03:28:11,465 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 03:28:11,483 INFO L208 MainTranslator]: Completed translation [2020-09-25 03:28:11,484 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 03:28:11 WrapperNode [2020-09-25 03:28:11,484 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 03:28:11,485 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 03:28:11,485 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 03:28:11,485 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 03:28:11,502 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 03:28:11" (1/1) ... [2020-09-25 03:28:11,503 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 03:28:11" (1/1) ... [2020-09-25 03:28:11,509 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 03:28:11" (1/1) ... [2020-09-25 03:28:11,510 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 03:28:11" (1/1) ... [2020-09-25 03:28:11,514 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 03:28:11" (1/1) ... [2020-09-25 03:28:11,520 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 03:28:11" (1/1) ... [2020-09-25 03:28:11,521 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 03:28:11" (1/1) ... [2020-09-25 03:28:11,523 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 03:28:11,523 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 03:28:11,523 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 03:28:11,524 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 03:28:11,525 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 03:28:11" (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 [2020-09-25 03:28:11,686 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 03:28:11,687 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 03:28:11,687 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-25 03:28:11,687 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-25 03:28:11,687 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 03:28:11,687 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 03:28:11,687 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-25 03:28:11,688 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-25 03:28:11,688 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-25 03:28:11,688 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-25 03:28:11,688 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 03:28:11,688 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 03:28:11,689 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 03:28:11,899 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 03:28:11,900 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-09-25 03:28:11,904 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 03:28:11 BoogieIcfgContainer [2020-09-25 03:28:11,905 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 03:28:11,906 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 03:28:11,906 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 03:28:11,910 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 03:28:11,910 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 03:28:11" (1/3) ... [2020-09-25 03:28:11,911 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@481fbc72 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 03:28:11, skipping insertion in model container [2020-09-25 03:28:11,912 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 03:28:11" (2/3) ... [2020-09-25 03:28:11,912 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@481fbc72 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 03:28:11, skipping insertion in model container [2020-09-25 03:28:11,912 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 03:28:11" (3/3) ... [2020-09-25 03:28:11,915 INFO L109 eAbstractionObserver]: Analyzing ICFG cggmp2005b.i [2020-09-25 03:28:11,927 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 03:28:11,937 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 03:28:11,970 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 03:28:12,028 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 03:28:12,028 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 03:28:12,028 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 03:28:12,029 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 03:28:12,030 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 03:28:12,030 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 03:28:12,030 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 03:28:12,030 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 03:28:12,056 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2020-09-25 03:28:12,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-25 03:28:12,064 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 03:28:12,065 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 03:28:12,066 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 03:28:12,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 03:28:12,085 INFO L82 PathProgramCache]: Analyzing trace with hash 1930258608, now seen corresponding path program 1 times [2020-09-25 03:28:12,094 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 03:28:12,095 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [583142016] [2020-09-25 03:28:12,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 03:28:12,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:28:12,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:12,253 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:28:12,253 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-09-25 03:28:12,253 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:28:12,254 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 56 [2020-09-25 03:28:12,256 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:28:12,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 03:28:12,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-09-25 03:28:12,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 03:28:12,257 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-25 03:28:12,283 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 03:28:12,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:28:12,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:12,290 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:28:12,290 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 03:28:12,290 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:28:12,290 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-25 03:28:12,291 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:28:12,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 03:28:12,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 03:28:12,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 03:28:12,292 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 03:28:12,298 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 03:28:12,299 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [583142016] [2020-09-25 03:28:12,302 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 03:28:12,302 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-09-25 03:28:12,303 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604393647] [2020-09-25 03:28:12,309 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-09-25 03:28:12,310 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 03:28:12,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-09-25 03:28:12,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-09-25 03:28:12,331 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 2 states. [2020-09-25 03:28:12,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 03:28:12,362 INFO L93 Difference]: Finished difference Result 48 states and 61 transitions. [2020-09-25 03:28:12,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-09-25 03:28:12,363 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 15 [2020-09-25 03:28:12,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 03:28:12,375 INFO L225 Difference]: With dead ends: 48 [2020-09-25 03:28:12,375 INFO L226 Difference]: Without dead ends: 22 [2020-09-25 03:28:12,379 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-09-25 03:28:12,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-09-25 03:28:12,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-09-25 03:28:12,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-09-25 03:28:12,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2020-09-25 03:28:12,429 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 15 [2020-09-25 03:28:12,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 03:28:12,429 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2020-09-25 03:28:12,429 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-09-25 03:28:12,430 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2020-09-25 03:28:12,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-25 03:28:12,431 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 03:28:12,431 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 03:28:12,431 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 03:28:12,432 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 03:28:12,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 03:28:12,432 INFO L82 PathProgramCache]: Analyzing trace with hash 1900705936, now seen corresponding path program 1 times [2020-09-25 03:28:12,433 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 03:28:12,433 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [659301411] [2020-09-25 03:28:12,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 03:28:12,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:28:12,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:12,491 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:28:12,491 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-09-25 03:28:12,495 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:28:12,495 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 47 [2020-09-25 03:28:12,495 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:28:12,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 03:28:12,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-25 03:28:12,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-09-25 03:28:12,496 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 03:28:12,540 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 03:28:12,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:28:12,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:12,544 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:28:12,545 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 03:28:12,545 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:28:12,545 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 03:28:12,546 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:28:12,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 03:28:12,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 03:28:12,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 03:28:12,547 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 03:28:12,550 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 03:28:12,550 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [659301411] [2020-09-25 03:28:12,551 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 03:28:12,551 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-25 03:28:12,551 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864148084] [2020-09-25 03:28:12,553 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-25 03:28:12,554 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 03:28:12,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-25 03:28:12,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-25 03:28:12,555 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand 3 states. [2020-09-25 03:28:12,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 03:28:12,587 INFO L93 Difference]: Finished difference Result 29 states and 31 transitions. [2020-09-25 03:28:12,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-25 03:28:12,588 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2020-09-25 03:28:12,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 03:28:12,589 INFO L225 Difference]: With dead ends: 29 [2020-09-25 03:28:12,589 INFO L226 Difference]: Without dead ends: 24 [2020-09-25 03:28:12,590 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-25 03:28:12,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-09-25 03:28:12,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2020-09-25 03:28:12,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-09-25 03:28:12,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2020-09-25 03:28:12,598 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 15 [2020-09-25 03:28:12,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 03:28:12,599 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2020-09-25 03:28:12,599 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-25 03:28:12,599 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2020-09-25 03:28:12,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-25 03:28:12,600 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 03:28:12,600 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] [2020-09-25 03:28:12,600 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 03:28:12,601 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 03:28:12,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 03:28:12,601 INFO L82 PathProgramCache]: Analyzing trace with hash 1024587775, now seen corresponding path program 1 times [2020-09-25 03:28:12,602 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 03:28:12,602 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2074062115] [2020-09-25 03:28:12,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 03:28:12,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:28:12,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:12,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:12,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:12,972 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:28:12,972 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-09-25 03:28:12,973 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 03:28:12,973 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 355 [2020-09-25 03:28:12,974 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:28:12,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 03:28:12,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-25 03:28:12,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-09-25 03:28:12,975 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-25 03:28:13,006 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 03:28:13,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:28:13,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:13,011 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:28:13,011 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 03:28:13,011 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:28:13,013 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-25 03:28:13,013 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:28:13,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 03:28:13,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 03:28:13,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 03:28:13,014 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:28:13,021 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 03:28:13,022 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2074062115] [2020-09-25 03:28:13,023 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 03:28:13,023 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-09-25 03:28:13,024 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277440079] [2020-09-25 03:28:13,024 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-25 03:28:13,025 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 03:28:13,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-25 03:28:13,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-09-25 03:28:13,026 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 4 states. [2020-09-25 03:28:13,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 03:28:13,074 INFO L93 Difference]: Finished difference Result 36 states and 40 transitions. [2020-09-25 03:28:13,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-25 03:28:13,074 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2020-09-25 03:28:13,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 03:28:13,075 INFO L225 Difference]: With dead ends: 36 [2020-09-25 03:28:13,075 INFO L226 Difference]: Without dead ends: 31 [2020-09-25 03:28:13,076 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-09-25 03:28:13,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-09-25 03:28:13,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2020-09-25 03:28:13,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-09-25 03:28:13,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2020-09-25 03:28:13,082 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 20 [2020-09-25 03:28:13,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 03:28:13,083 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2020-09-25 03:28:13,083 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-25 03:28:13,083 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2020-09-25 03:28:13,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-25 03:28:13,084 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 03:28:13,084 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] [2020-09-25 03:28:13,085 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 03:28:13,085 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 03:28:13,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 03:28:13,085 INFO L82 PathProgramCache]: Analyzing trace with hash 713803248, now seen corresponding path program 2 times [2020-09-25 03:28:13,085 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 03:28:13,086 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [15371974] [2020-09-25 03:28:13,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 03:28:13,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:28:13,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:13,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:13,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:13,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:13,505 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:28:13,505 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-09-25 03:28:13,505 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-25 03:28:13,506 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 410 [2020-09-25 03:28:13,506 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:28:13,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 03:28:13,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-25 03:28:13,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-09-25 03:28:13,507 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 03:28:13,545 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 03:28:13,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:28:13,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:13,567 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:28:13,567 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 03:28:13,567 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:28:13,568 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 03:28:13,568 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:28:13,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 03:28:13,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 03:28:13,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 03:28:13,569 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:28:13,571 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 03:28:13,571 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [15371974] [2020-09-25 03:28:13,572 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 03:28:13,572 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-25 03:28:13,572 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396981258] [2020-09-25 03:28:13,573 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 03:28:13,573 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 03:28:13,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 03:28:13,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-09-25 03:28:13,575 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand 5 states. [2020-09-25 03:28:13,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 03:28:13,619 INFO L93 Difference]: Finished difference Result 43 states and 49 transitions. [2020-09-25 03:28:13,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-25 03:28:13,620 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 25 [2020-09-25 03:28:13,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 03:28:13,621 INFO L225 Difference]: With dead ends: 43 [2020-09-25 03:28:13,621 INFO L226 Difference]: Without dead ends: 38 [2020-09-25 03:28:13,622 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-09-25 03:28:13,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-09-25 03:28:13,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2020-09-25 03:28:13,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-09-25 03:28:13,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 43 transitions. [2020-09-25 03:28:13,630 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 43 transitions. Word has length 25 [2020-09-25 03:28:13,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 03:28:13,630 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 43 transitions. [2020-09-25 03:28:13,630 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 03:28:13,630 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 43 transitions. [2020-09-25 03:28:13,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-09-25 03:28:13,632 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 03:28:13,632 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 03:28:13,632 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 03:28:13,632 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 03:28:13,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 03:28:13,633 INFO L82 PathProgramCache]: Analyzing trace with hash 761923231, now seen corresponding path program 3 times [2020-09-25 03:28:13,633 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 03:28:13,633 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1893447197] [2020-09-25 03:28:13,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 03:28:13,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:28:13,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:13,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:13,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:13,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:13,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:14,052 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:28:14,052 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-09-25 03:28:14,052 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-25 03:28:14,053 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 410 [2020-09-25 03:28:14,053 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:28:14,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-25 03:28:14,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-25 03:28:14,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-09-25 03:28:14,054 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:28:14,103 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 03:28:14,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:28:14,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:14,106 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:28:14,106 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 03:28:14,107 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:28:14,107 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 03:28:14,107 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:28:14,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 03:28:14,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 03:28:14,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 03:28:14,108 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:28:14,111 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 03:28:14,111 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1893447197] [2020-09-25 03:28:14,111 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 03:28:14,112 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-09-25 03:28:14,112 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640225427] [2020-09-25 03:28:14,112 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-25 03:28:14,113 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 03:28:14,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-25 03:28:14,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-09-25 03:28:14,113 INFO L87 Difference]: Start difference. First operand 37 states and 43 transitions. Second operand 6 states. [2020-09-25 03:28:14,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 03:28:14,159 INFO L93 Difference]: Finished difference Result 50 states and 58 transitions. [2020-09-25 03:28:14,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-25 03:28:14,160 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 30 [2020-09-25 03:28:14,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 03:28:14,161 INFO L225 Difference]: With dead ends: 50 [2020-09-25 03:28:14,161 INFO L226 Difference]: Without dead ends: 45 [2020-09-25 03:28:14,162 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-09-25 03:28:14,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-09-25 03:28:14,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2020-09-25 03:28:14,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-09-25 03:28:14,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 52 transitions. [2020-09-25 03:28:14,170 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 52 transitions. Word has length 30 [2020-09-25 03:28:14,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 03:28:14,171 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 52 transitions. [2020-09-25 03:28:14,171 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-25 03:28:14,171 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 52 transitions. [2020-09-25 03:28:14,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-09-25 03:28:14,172 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 03:28:14,172 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 03:28:14,173 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-25 03:28:14,173 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 03:28:14,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 03:28:14,173 INFO L82 PathProgramCache]: Analyzing trace with hash -1508648112, now seen corresponding path program 4 times [2020-09-25 03:28:14,173 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 03:28:14,174 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1092006778] [2020-09-25 03:28:14,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 03:28:14,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:28:14,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:14,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:14,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:14,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:14,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:14,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:14,743 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:28:14,743 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-09-25 03:28:14,743 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-09-25 03:28:14,744 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 561 [2020-09-25 03:28:14,744 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:28:14,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 03:28:14,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-25 03:28:14,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-09-25 03:28:14,745 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 03:28:14,803 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 03:28:14,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:28:14,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:14,806 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:28:14,807 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 03:28:14,807 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:28:14,807 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 03:28:14,807 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:28:14,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 03:28:14,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 03:28:14,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 03:28:14,808 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:28:14,812 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 03:28:14,812 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1092006778] [2020-09-25 03:28:14,813 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 03:28:14,813 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-25 03:28:14,813 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074362303] [2020-09-25 03:28:14,814 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-25 03:28:14,814 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 03:28:14,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-25 03:28:14,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-09-25 03:28:14,817 INFO L87 Difference]: Start difference. First operand 44 states and 52 transitions. Second operand 7 states. [2020-09-25 03:28:14,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 03:28:14,900 INFO L93 Difference]: Finished difference Result 57 states and 67 transitions. [2020-09-25 03:28:14,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-25 03:28:14,902 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 35 [2020-09-25 03:28:14,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 03:28:14,904 INFO L225 Difference]: With dead ends: 57 [2020-09-25 03:28:14,904 INFO L226 Difference]: Without dead ends: 52 [2020-09-25 03:28:14,905 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-09-25 03:28:14,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-09-25 03:28:14,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2020-09-25 03:28:14,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-09-25 03:28:14,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 61 transitions. [2020-09-25 03:28:14,922 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 61 transitions. Word has length 35 [2020-09-25 03:28:14,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 03:28:14,923 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 61 transitions. [2020-09-25 03:28:14,925 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-25 03:28:14,925 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 61 transitions. [2020-09-25 03:28:14,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-09-25 03:28:14,926 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 03:28:14,927 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 03:28:14,927 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-25 03:28:14,927 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 03:28:14,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 03:28:14,929 INFO L82 PathProgramCache]: Analyzing trace with hash 544755007, now seen corresponding path program 5 times [2020-09-25 03:28:14,929 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 03:28:14,930 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [222711738] [2020-09-25 03:28:14,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 03:28:14,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:28:14,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:14,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:14,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:15,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:15,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:15,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:15,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:15,709 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:28:15,710 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-09-25 03:28:15,710 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-25 03:28:15,710 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 765 [2020-09-25 03:28:15,710 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:28:15,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-25 03:28:15,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-25 03:28:15,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-09-25 03:28:15,711 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:28:15,795 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 03:28:15,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:28:15,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:15,798 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:28:15,798 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 03:28:15,798 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:28:15,799 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 03:28:15,799 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:28:15,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 03:28:15,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 03:28:15,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 03:28:15,800 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:28:15,804 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 03:28:15,805 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [222711738] [2020-09-25 03:28:15,805 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 03:28:15,805 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-25 03:28:15,805 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760718180] [2020-09-25 03:28:15,807 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-25 03:28:15,807 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 03:28:15,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-25 03:28:15,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-09-25 03:28:15,809 INFO L87 Difference]: Start difference. First operand 51 states and 61 transitions. Second operand 8 states. [2020-09-25 03:28:15,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 03:28:15,867 INFO L93 Difference]: Finished difference Result 64 states and 76 transitions. [2020-09-25 03:28:15,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-25 03:28:15,868 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 40 [2020-09-25 03:28:15,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 03:28:15,869 INFO L225 Difference]: With dead ends: 64 [2020-09-25 03:28:15,869 INFO L226 Difference]: Without dead ends: 59 [2020-09-25 03:28:15,870 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-09-25 03:28:15,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-09-25 03:28:15,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2020-09-25 03:28:15,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-09-25 03:28:15,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 70 transitions. [2020-09-25 03:28:15,878 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 70 transitions. Word has length 40 [2020-09-25 03:28:15,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 03:28:15,879 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 70 transitions. [2020-09-25 03:28:15,879 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-25 03:28:15,879 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 70 transitions. [2020-09-25 03:28:15,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-09-25 03:28:15,880 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 03:28:15,880 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 03:28:15,881 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-25 03:28:15,881 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 03:28:15,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 03:28:15,881 INFO L82 PathProgramCache]: Analyzing trace with hash -267863888, now seen corresponding path program 6 times [2020-09-25 03:28:15,882 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 03:28:15,882 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [530126121] [2020-09-25 03:28:15,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 03:28:15,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:28:15,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:15,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:15,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:15,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:15,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:15,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:15,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:16,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:16,725 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:28:16,725 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-09-25 03:28:16,726 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-25 03:28:16,726 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 836 [2020-09-25 03:28:16,726 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:28:16,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 03:28:16,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-25 03:28:16,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-09-25 03:28:16,727 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:28:16,801 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 03:28:16,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:28:16,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:16,804 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:28:16,804 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 03:28:16,805 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:28:16,805 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 03:28:16,805 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:28:16,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 03:28:16,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 03:28:16,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 03:28:16,806 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:28:16,810 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 03:28:16,810 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [530126121] [2020-09-25 03:28:16,811 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 03:28:16,811 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-25 03:28:16,811 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342491492] [2020-09-25 03:28:16,812 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-25 03:28:16,812 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 03:28:16,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-25 03:28:16,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-09-25 03:28:16,813 INFO L87 Difference]: Start difference. First operand 58 states and 70 transitions. Second operand 9 states. [2020-09-25 03:28:16,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 03:28:16,870 INFO L93 Difference]: Finished difference Result 71 states and 85 transitions. [2020-09-25 03:28:16,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-25 03:28:16,871 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 45 [2020-09-25 03:28:16,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 03:28:16,873 INFO L225 Difference]: With dead ends: 71 [2020-09-25 03:28:16,873 INFO L226 Difference]: Without dead ends: 66 [2020-09-25 03:28:16,874 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-09-25 03:28:16,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-09-25 03:28:16,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2020-09-25 03:28:16,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-09-25 03:28:16,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 79 transitions. [2020-09-25 03:28:16,882 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 79 transitions. Word has length 45 [2020-09-25 03:28:16,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 03:28:16,882 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 79 transitions. [2020-09-25 03:28:16,882 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-25 03:28:16,882 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 79 transitions. [2020-09-25 03:28:16,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-09-25 03:28:16,883 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 03:28:16,884 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 03:28:16,884 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-25 03:28:16,884 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 03:28:16,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 03:28:16,884 INFO L82 PathProgramCache]: Analyzing trace with hash -1311323169, now seen corresponding path program 7 times [2020-09-25 03:28:16,885 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 03:28:16,885 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1169388491] [2020-09-25 03:28:16,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 03:28:16,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:28:16,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:16,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:16,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:16,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:17,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:17,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:17,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:17,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:17,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:17,932 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:28:17,933 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-09-25 03:28:17,933 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-09-25 03:28:17,933 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1041 [2020-09-25 03:28:17,933 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:28:17,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-25 03:28:17,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-25 03:28:17,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-09-25 03:28:17,934 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:28:18,024 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 03:28:18,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:28:18,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:18,028 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:28:18,028 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 03:28:18,028 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:28:18,028 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 03:28:18,028 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:28:18,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 03:28:18,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 03:28:18,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 03:28:18,029 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:28:18,035 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 03:28:18,036 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1169388491] [2020-09-25 03:28:18,040 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 03:28:18,040 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-25 03:28:18,041 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348522489] [2020-09-25 03:28:18,041 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-25 03:28:18,042 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 03:28:18,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-25 03:28:18,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-09-25 03:28:18,042 INFO L87 Difference]: Start difference. First operand 65 states and 79 transitions. Second operand 10 states. [2020-09-25 03:28:18,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 03:28:18,108 INFO L93 Difference]: Finished difference Result 78 states and 94 transitions. [2020-09-25 03:28:18,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-25 03:28:18,109 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 50 [2020-09-25 03:28:18,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 03:28:18,110 INFO L225 Difference]: With dead ends: 78 [2020-09-25 03:28:18,111 INFO L226 Difference]: Without dead ends: 73 [2020-09-25 03:28:18,111 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-09-25 03:28:18,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-09-25 03:28:18,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 72. [2020-09-25 03:28:18,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-09-25 03:28:18,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 88 transitions. [2020-09-25 03:28:18,128 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 88 transitions. Word has length 50 [2020-09-25 03:28:18,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 03:28:18,128 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 88 transitions. [2020-09-25 03:28:18,128 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-25 03:28:18,129 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 88 transitions. [2020-09-25 03:28:18,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-09-25 03:28:18,129 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 03:28:18,130 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 03:28:18,130 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-25 03:28:18,130 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 03:28:18,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 03:28:18,130 INFO L82 PathProgramCache]: Analyzing trace with hash -1659871728, now seen corresponding path program 8 times [2020-09-25 03:28:18,131 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 03:28:18,132 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [455719764] [2020-09-25 03:28:18,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 03:28:18,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:28:18,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:18,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:18,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:18,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:18,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:18,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:18,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:18,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:18,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:18,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:19,334 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:28:19,335 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-09-25 03:28:19,335 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-09-25 03:28:19,335 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1192 [2020-09-25 03:28:19,335 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:28:19,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-25 03:28:19,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-25 03:28:19,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-09-25 03:28:19,336 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:28:19,438 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 03:28:19,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:28:19,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:19,441 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:28:19,441 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 03:28:19,441 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:28:19,441 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 03:28:19,442 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:28:19,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 03:28:19,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 03:28:19,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 03:28:19,443 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:28:19,448 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 0 proven. 148 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 03:28:19,449 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [455719764] [2020-09-25 03:28:19,449 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 03:28:19,449 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-25 03:28:19,449 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052210995] [2020-09-25 03:28:19,450 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-25 03:28:19,450 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 03:28:19,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-25 03:28:19,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-09-25 03:28:19,451 INFO L87 Difference]: Start difference. First operand 72 states and 88 transitions. Second operand 11 states. [2020-09-25 03:28:19,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 03:28:19,516 INFO L93 Difference]: Finished difference Result 85 states and 103 transitions. [2020-09-25 03:28:19,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-25 03:28:19,516 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 55 [2020-09-25 03:28:19,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 03:28:19,518 INFO L225 Difference]: With dead ends: 85 [2020-09-25 03:28:19,518 INFO L226 Difference]: Without dead ends: 80 [2020-09-25 03:28:19,518 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-09-25 03:28:19,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-09-25 03:28:19,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2020-09-25 03:28:19,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-09-25 03:28:19,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 97 transitions. [2020-09-25 03:28:19,526 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 97 transitions. Word has length 55 [2020-09-25 03:28:19,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 03:28:19,526 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 97 transitions. [2020-09-25 03:28:19,526 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-25 03:28:19,527 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 97 transitions. [2020-09-25 03:28:19,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-09-25 03:28:19,528 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 03:28:19,528 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 03:28:19,528 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-25 03:28:19,528 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 03:28:19,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 03:28:19,529 INFO L82 PathProgramCache]: Analyzing trace with hash 1151304319, now seen corresponding path program 9 times [2020-09-25 03:28:19,529 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 03:28:19,529 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [703538475] [2020-09-25 03:28:19,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 03:28:19,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:28:19,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:19,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:19,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:19,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:19,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:19,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:19,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:19,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:19,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:19,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:19,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:20,782 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:28:20,783 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-09-25 03:28:20,783 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-09-25 03:28:20,783 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1247 [2020-09-25 03:28:20,783 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:28:20,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-09-25 03:28:20,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-25 03:28:20,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-09-25 03:28:20,784 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:28:20,901 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 03:28:20,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:28:20,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:20,904 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:28:20,904 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 03:28:20,905 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:28:20,905 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 03:28:20,905 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:28:20,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 03:28:20,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 03:28:20,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 03:28:20,906 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:28:20,912 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 189 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 03:28:20,912 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [703538475] [2020-09-25 03:28:20,912 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 03:28:20,913 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-09-25 03:28:20,913 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082917037] [2020-09-25 03:28:20,913 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-25 03:28:20,914 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 03:28:20,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-25 03:28:20,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-09-25 03:28:20,914 INFO L87 Difference]: Start difference. First operand 79 states and 97 transitions. Second operand 12 states. [2020-09-25 03:28:20,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 03:28:20,999 INFO L93 Difference]: Finished difference Result 92 states and 112 transitions. [2020-09-25 03:28:20,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-25 03:28:21,000 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 60 [2020-09-25 03:28:21,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 03:28:21,001 INFO L225 Difference]: With dead ends: 92 [2020-09-25 03:28:21,001 INFO L226 Difference]: Without dead ends: 87 [2020-09-25 03:28:21,001 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-09-25 03:28:21,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-09-25 03:28:21,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 86. [2020-09-25 03:28:21,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-09-25 03:28:21,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 106 transitions. [2020-09-25 03:28:21,008 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 106 transitions. Word has length 60 [2020-09-25 03:28:21,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 03:28:21,008 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 106 transitions. [2020-09-25 03:28:21,008 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-25 03:28:21,009 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 106 transitions. [2020-09-25 03:28:21,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-09-25 03:28:21,010 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 03:28:21,010 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 03:28:21,010 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-25 03:28:21,010 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 03:28:21,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 03:28:21,011 INFO L82 PathProgramCache]: Analyzing trace with hash 709938032, now seen corresponding path program 10 times [2020-09-25 03:28:21,011 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 03:28:21,011 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [263616640] [2020-09-25 03:28:21,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 03:28:21,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:28:21,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:21,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:21,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:21,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:21,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:21,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:21,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:21,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:21,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:21,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:21,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:21,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:22,363 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:28:22,364 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-09-25 03:28:22,364 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-09-25 03:28:22,364 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1346 [2020-09-25 03:28:22,364 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:28:22,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-09-25 03:28:22,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-25 03:28:22,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-09-25 03:28:22,365 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:28:22,492 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 03:28:22,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:28:22,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:22,494 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:28:22,495 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 03:28:22,495 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:28:22,495 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 03:28:22,495 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:28:22,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 03:28:22,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 03:28:22,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 03:28:22,496 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:28:22,503 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 235 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 03:28:22,503 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [263616640] [2020-09-25 03:28:22,504 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 03:28:22,504 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-09-25 03:28:22,504 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139364170] [2020-09-25 03:28:22,505 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-25 03:28:22,505 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 03:28:22,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-25 03:28:22,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-09-25 03:28:22,506 INFO L87 Difference]: Start difference. First operand 86 states and 106 transitions. Second operand 13 states. [2020-09-25 03:28:22,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 03:28:22,610 INFO L93 Difference]: Finished difference Result 99 states and 121 transitions. [2020-09-25 03:28:22,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-25 03:28:22,610 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 65 [2020-09-25 03:28:22,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 03:28:22,611 INFO L225 Difference]: With dead ends: 99 [2020-09-25 03:28:22,611 INFO L226 Difference]: Without dead ends: 94 [2020-09-25 03:28:22,612 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-09-25 03:28:22,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-09-25 03:28:22,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 93. [2020-09-25 03:28:22,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-09-25 03:28:22,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 115 transitions. [2020-09-25 03:28:22,618 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 115 transitions. Word has length 65 [2020-09-25 03:28:22,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 03:28:22,618 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 115 transitions. [2020-09-25 03:28:22,618 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-25 03:28:22,618 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 115 transitions. [2020-09-25 03:28:22,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-09-25 03:28:22,619 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 03:28:22,619 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 03:28:22,620 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-09-25 03:28:22,620 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 03:28:22,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 03:28:22,620 INFO L82 PathProgramCache]: Analyzing trace with hash -1553174241, now seen corresponding path program 11 times [2020-09-25 03:28:22,620 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 03:28:22,621 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [849155333] [2020-09-25 03:28:22,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 03:28:22,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:28:22,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:22,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:22,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:22,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:22,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:22,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:22,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:22,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:22,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:22,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:22,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:22,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:22,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:24,083 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:28:24,083 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-09-25 03:28:24,083 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-09-25 03:28:24,084 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1457 [2020-09-25 03:28:24,084 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:28:24,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-09-25 03:28:24,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-25 03:28:24,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-09-25 03:28:24,085 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:28:24,246 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 03:28:24,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:28:24,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:24,248 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:28:24,249 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 03:28:24,249 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:28:24,249 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 03:28:24,249 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:28:24,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 03:28:24,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 03:28:24,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 03:28:24,250 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:28:24,258 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 0 proven. 286 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 03:28:24,258 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [849155333] [2020-09-25 03:28:24,258 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 03:28:24,259 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-09-25 03:28:24,259 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518403638] [2020-09-25 03:28:24,259 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-25 03:28:24,259 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 03:28:24,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-25 03:28:24,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-09-25 03:28:24,260 INFO L87 Difference]: Start difference. First operand 93 states and 115 transitions. Second operand 14 states. [2020-09-25 03:28:24,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 03:28:24,345 INFO L93 Difference]: Finished difference Result 106 states and 130 transitions. [2020-09-25 03:28:24,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-25 03:28:24,345 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 70 [2020-09-25 03:28:24,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 03:28:24,346 INFO L225 Difference]: With dead ends: 106 [2020-09-25 03:28:24,346 INFO L226 Difference]: Without dead ends: 101 [2020-09-25 03:28:24,347 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-09-25 03:28:24,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-09-25 03:28:24,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 100. [2020-09-25 03:28:24,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-09-25 03:28:24,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 124 transitions. [2020-09-25 03:28:24,352 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 124 transitions. Word has length 70 [2020-09-25 03:28:24,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 03:28:24,353 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 124 transitions. [2020-09-25 03:28:24,353 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-25 03:28:24,353 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 124 transitions. [2020-09-25 03:28:24,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-09-25 03:28:24,354 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 03:28:24,354 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 03:28:24,355 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-09-25 03:28:24,355 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 03:28:24,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 03:28:24,355 INFO L82 PathProgramCache]: Analyzing trace with hash 1567621328, now seen corresponding path program 12 times [2020-09-25 03:28:24,355 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 03:28:24,356 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1011562940] [2020-09-25 03:28:24,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 03:28:24,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:28:24,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:24,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:24,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:24,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:24,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:24,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:24,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:24,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:24,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:24,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:24,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:24,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:24,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:24,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:25,984 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:28:25,985 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-09-25 03:28:25,986 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-09-25 03:28:25,986 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1623 [2020-09-25 03:28:25,986 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:28:25,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-09-25 03:28:25,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-25 03:28:25,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-09-25 03:28:25,987 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:28:26,166 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 03:28:26,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:28:26,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:26,169 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:28:26,170 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 03:28:26,170 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:28:26,170 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 03:28:26,170 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:28:26,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 03:28:26,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 03:28:26,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 03:28:26,171 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:28:26,178 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 03:28:26,179 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1011562940] [2020-09-25 03:28:26,179 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 03:28:26,179 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-09-25 03:28:26,179 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058704216] [2020-09-25 03:28:26,180 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-25 03:28:26,180 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 03:28:26,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-25 03:28:26,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-09-25 03:28:26,181 INFO L87 Difference]: Start difference. First operand 100 states and 124 transitions. Second operand 15 states. [2020-09-25 03:28:26,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 03:28:26,273 INFO L93 Difference]: Finished difference Result 113 states and 139 transitions. [2020-09-25 03:28:26,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-25 03:28:26,274 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 75 [2020-09-25 03:28:26,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 03:28:26,275 INFO L225 Difference]: With dead ends: 113 [2020-09-25 03:28:26,275 INFO L226 Difference]: Without dead ends: 108 [2020-09-25 03:28:26,275 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-09-25 03:28:26,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-09-25 03:28:26,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 107. [2020-09-25 03:28:26,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-09-25 03:28:26,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 133 transitions. [2020-09-25 03:28:26,282 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 133 transitions. Word has length 75 [2020-09-25 03:28:26,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 03:28:26,283 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 133 transitions. [2020-09-25 03:28:26,283 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-25 03:28:26,283 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 133 transitions. [2020-09-25 03:28:26,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-09-25 03:28:26,289 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 03:28:26,289 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 03:28:26,289 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-09-25 03:28:26,289 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 03:28:26,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 03:28:26,290 INFO L82 PathProgramCache]: Analyzing trace with hash -1604872257, now seen corresponding path program 13 times [2020-09-25 03:28:26,290 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 03:28:26,290 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [941293381] [2020-09-25 03:28:26,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 03:28:26,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:28:26,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:26,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:26,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:26,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:26,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:26,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:26,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:26,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:26,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:26,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:26,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:26,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:26,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:26,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:26,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:28,110 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:28:28,110 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-09-25 03:28:28,110 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-09-25 03:28:28,110 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1809 [2020-09-25 03:28:28,110 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:28:28,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-09-25 03:28:28,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-25 03:28:28,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 69 [2020-09-25 03:28:28,111 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:28:28,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 03:28:28,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:28:28,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:28,316 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:28:28,316 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 03:28:28,317 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:28:28,317 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 03:28:28,318 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:28:28,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 03:28:28,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 03:28:28,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 03:28:28,319 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 03:28:28,333 INFO L134 CoverageAnalysis]: Checked inductivity of 403 backedges. 0 proven. 403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 03:28:28,334 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [941293381] [2020-09-25 03:28:28,334 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 03:28:28,335 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-09-25 03:28:28,335 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155648697] [2020-09-25 03:28:28,336 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-25 03:28:28,336 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 03:28:28,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-25 03:28:28,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-09-25 03:28:28,337 INFO L87 Difference]: Start difference. First operand 107 states and 133 transitions. Second operand 16 states. [2020-09-25 03:28:28,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 03:28:28,467 INFO L93 Difference]: Finished difference Result 120 states and 148 transitions. [2020-09-25 03:28:28,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-25 03:28:28,467 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 80 [2020-09-25 03:28:28,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 03:28:28,469 INFO L225 Difference]: With dead ends: 120 [2020-09-25 03:28:28,469 INFO L226 Difference]: Without dead ends: 115 [2020-09-25 03:28:28,472 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-09-25 03:28:28,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-09-25 03:28:28,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 114. [2020-09-25 03:28:28,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-09-25 03:28:28,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 142 transitions. [2020-09-25 03:28:28,481 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 142 transitions. Word has length 80 [2020-09-25 03:28:28,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 03:28:28,482 INFO L479 AbstractCegarLoop]: Abstraction has 114 states and 142 transitions. [2020-09-25 03:28:28,482 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-25 03:28:28,482 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 142 transitions. [2020-09-25 03:28:28,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-09-25 03:28:28,484 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 03:28:28,484 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 03:28:28,487 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-09-25 03:28:28,487 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 03:28:28,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 03:28:28,487 INFO L82 PathProgramCache]: Analyzing trace with hash -1533805008, now seen corresponding path program 14 times [2020-09-25 03:28:28,488 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 03:28:28,488 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1635169876] [2020-09-25 03:28:28,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 03:28:28,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:28:28,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:28,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:28,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:28,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:28,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:28,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:28,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:28,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:28,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:28,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:28,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:28,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:28,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:28,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:28,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:29,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:30,605 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:28:30,605 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-09-25 03:28:30,605 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-09-25 03:28:30,606 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2107 [2020-09-25 03:28:30,606 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:28:30,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-09-25 03:28:30,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-25 03:28:30,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-09-25 03:28:30,607 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:28:30,802 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 03:28:30,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:28:30,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:30,805 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:28:30,805 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 03:28:30,805 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:28:30,806 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 03:28:30,806 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:28:30,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 03:28:30,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 03:28:30,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 03:28:30,807 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:28:30,816 INFO L134 CoverageAnalysis]: Checked inductivity of 469 backedges. 0 proven. 469 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 03:28:30,816 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1635169876] [2020-09-25 03:28:30,817 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 03:28:30,817 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-09-25 03:28:30,817 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511080207] [2020-09-25 03:28:30,817 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-25 03:28:30,818 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 03:28:30,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-25 03:28:30,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-09-25 03:28:30,818 INFO L87 Difference]: Start difference. First operand 114 states and 142 transitions. Second operand 17 states. [2020-09-25 03:28:30,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 03:28:30,935 INFO L93 Difference]: Finished difference Result 127 states and 157 transitions. [2020-09-25 03:28:30,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-25 03:28:30,936 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 85 [2020-09-25 03:28:30,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 03:28:30,937 INFO L225 Difference]: With dead ends: 127 [2020-09-25 03:28:30,938 INFO L226 Difference]: Without dead ends: 122 [2020-09-25 03:28:30,938 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-09-25 03:28:30,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-09-25 03:28:30,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 121. [2020-09-25 03:28:30,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-09-25 03:28:30,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 151 transitions. [2020-09-25 03:28:30,944 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 151 transitions. Word has length 85 [2020-09-25 03:28:30,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 03:28:30,945 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 151 transitions. [2020-09-25 03:28:30,945 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-25 03:28:30,945 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 151 transitions. [2020-09-25 03:28:30,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-09-25 03:28:30,946 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 03:28:30,946 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 03:28:30,946 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-09-25 03:28:30,947 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 03:28:30,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 03:28:30,947 INFO L82 PathProgramCache]: Analyzing trace with hash -1258621345, now seen corresponding path program 15 times [2020-09-25 03:28:30,947 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 03:28:30,948 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1268089671] [2020-09-25 03:28:30,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 03:28:30,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:28:30,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:30,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:30,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:30,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:31,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:31,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:31,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:31,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:31,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:31,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:31,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:31,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:31,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:31,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:31,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:31,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:31,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:33,188 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:28:33,189 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 99 [2020-09-25 03:28:33,189 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 17 [2020-09-25 03:28:33,189 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2235 [2020-09-25 03:28:33,189 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:28:33,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-09-25 03:28:33,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-25 03:28:33,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 79 [2020-09-25 03:28:33,190 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:28:33,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 03:28:33,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:28:33,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:33,383 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:28:33,383 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 03:28:33,383 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:28:33,383 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 03:28:33,383 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:28:33,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 03:28:33,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 03:28:33,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 03:28:33,384 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:28:33,392 INFO L134 CoverageAnalysis]: Checked inductivity of 540 backedges. 0 proven. 540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 03:28:33,393 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1268089671] [2020-09-25 03:28:33,393 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 03:28:33,393 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-09-25 03:28:33,393 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405517278] [2020-09-25 03:28:33,394 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-25 03:28:33,394 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 03:28:33,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-25 03:28:33,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-09-25 03:28:33,395 INFO L87 Difference]: Start difference. First operand 121 states and 151 transitions. Second operand 18 states. [2020-09-25 03:28:33,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 03:28:33,495 INFO L93 Difference]: Finished difference Result 134 states and 166 transitions. [2020-09-25 03:28:33,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-25 03:28:33,495 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 90 [2020-09-25 03:28:33,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 03:28:33,497 INFO L225 Difference]: With dead ends: 134 [2020-09-25 03:28:33,497 INFO L226 Difference]: Without dead ends: 129 [2020-09-25 03:28:33,497 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-09-25 03:28:33,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-09-25 03:28:33,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 128. [2020-09-25 03:28:33,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2020-09-25 03:28:33,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 160 transitions. [2020-09-25 03:28:33,503 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 160 transitions. Word has length 90 [2020-09-25 03:28:33,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 03:28:33,503 INFO L479 AbstractCegarLoop]: Abstraction has 128 states and 160 transitions. [2020-09-25 03:28:33,503 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-25 03:28:33,503 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 160 transitions. [2020-09-25 03:28:33,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-09-25 03:28:33,504 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 03:28:33,504 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 03:28:33,505 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-09-25 03:28:33,505 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 03:28:33,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 03:28:33,505 INFO L82 PathProgramCache]: Analyzing trace with hash 1986184080, now seen corresponding path program 16 times [2020-09-25 03:28:33,505 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 03:28:33,506 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [399576450] [2020-09-25 03:28:33,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 03:28:33,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:28:33,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:33,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:33,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:33,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:33,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:33,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:33,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:33,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:33,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:33,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:33,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:33,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:33,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:33,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:33,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:33,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:33,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:33,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:35,895 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:28:35,895 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-09-25 03:28:35,895 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 18 [2020-09-25 03:28:35,896 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2384 [2020-09-25 03:28:35,896 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:28:35,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-09-25 03:28:35,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-25 03:28:35,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 84 [2020-09-25 03:28:35,896 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:28:36,160 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 03:28:36,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:28:36,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:36,163 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:28:36,163 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 03:28:36,163 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:28:36,163 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 03:28:36,163 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:28:36,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 03:28:36,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 03:28:36,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 03:28:36,164 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:28:36,170 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 0 proven. 616 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 03:28:36,171 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [399576450] [2020-09-25 03:28:36,172 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 03:28:36,172 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-09-25 03:28:36,174 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641452401] [2020-09-25 03:28:36,182 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-25 03:28:36,182 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 03:28:36,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-25 03:28:36,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-09-25 03:28:36,183 INFO L87 Difference]: Start difference. First operand 128 states and 160 transitions. Second operand 19 states. [2020-09-25 03:28:36,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 03:28:36,315 INFO L93 Difference]: Finished difference Result 141 states and 175 transitions. [2020-09-25 03:28:36,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-25 03:28:36,315 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 95 [2020-09-25 03:28:36,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 03:28:36,317 INFO L225 Difference]: With dead ends: 141 [2020-09-25 03:28:36,317 INFO L226 Difference]: Without dead ends: 136 [2020-09-25 03:28:36,318 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-09-25 03:28:36,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-09-25 03:28:36,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 135. [2020-09-25 03:28:36,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2020-09-25 03:28:36,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 169 transitions. [2020-09-25 03:28:36,323 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 169 transitions. Word has length 95 [2020-09-25 03:28:36,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 03:28:36,323 INFO L479 AbstractCegarLoop]: Abstraction has 135 states and 169 transitions. [2020-09-25 03:28:36,324 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-25 03:28:36,324 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 169 transitions. [2020-09-25 03:28:36,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-09-25 03:28:36,325 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 03:28:36,325 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 03:28:36,325 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-09-25 03:28:36,325 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 03:28:36,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 03:28:36,326 INFO L82 PathProgramCache]: Analyzing trace with hash -1569682177, now seen corresponding path program 17 times [2020-09-25 03:28:36,326 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 03:28:36,326 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1793422787] [2020-09-25 03:28:36,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 03:28:36,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:28:36,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:36,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:36,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:36,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:36,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:36,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:36,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:36,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:36,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:36,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:36,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:36,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:36,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:36,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:36,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:36,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:36,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:36,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:36,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:38,747 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:28:38,747 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 109 [2020-09-25 03:28:38,747 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 19 [2020-09-25 03:28:38,748 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2416 [2020-09-25 03:28:38,748 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:28:38,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-09-25 03:28:38,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-25 03:28:38,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 89 [2020-09-25 03:28:38,749 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:28:39,045 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 03:28:39,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:28:39,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:39,047 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:28:39,048 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 03:28:39,048 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:28:39,048 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 03:28:39,048 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:28:39,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 03:28:39,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 03:28:39,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 03:28:39,049 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:28:39,057 INFO L134 CoverageAnalysis]: Checked inductivity of 697 backedges. 0 proven. 697 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 03:28:39,058 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1793422787] [2020-09-25 03:28:39,058 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 03:28:39,058 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-09-25 03:28:39,058 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180601087] [2020-09-25 03:28:39,059 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-25 03:28:39,059 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 03:28:39,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-25 03:28:39,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-09-25 03:28:39,060 INFO L87 Difference]: Start difference. First operand 135 states and 169 transitions. Second operand 20 states. [2020-09-25 03:28:39,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 03:28:39,210 INFO L93 Difference]: Finished difference Result 148 states and 184 transitions. [2020-09-25 03:28:39,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-25 03:28:39,211 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 100 [2020-09-25 03:28:39,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 03:28:39,212 INFO L225 Difference]: With dead ends: 148 [2020-09-25 03:28:39,212 INFO L226 Difference]: Without dead ends: 143 [2020-09-25 03:28:39,213 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-09-25 03:28:39,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-09-25 03:28:39,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 142. [2020-09-25 03:28:39,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-09-25 03:28:39,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 178 transitions. [2020-09-25 03:28:39,219 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 178 transitions. Word has length 100 [2020-09-25 03:28:39,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 03:28:39,219 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 178 transitions. [2020-09-25 03:28:39,219 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-25 03:28:39,219 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 178 transitions. [2020-09-25 03:28:39,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-09-25 03:28:39,220 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 03:28:39,221 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 03:28:39,221 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-09-25 03:28:39,221 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 03:28:39,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 03:28:39,221 INFO L82 PathProgramCache]: Analyzing trace with hash -1308471056, now seen corresponding path program 18 times [2020-09-25 03:28:39,222 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 03:28:39,222 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [898139214] [2020-09-25 03:28:39,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 03:28:39,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:28:39,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:39,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:39,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:39,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:39,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:39,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:39,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:39,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:39,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:39,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:39,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:39,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:39,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:39,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:39,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:39,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:39,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:39,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:39,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:40,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:42,420 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:28:42,420 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 114 [2020-09-25 03:28:42,420 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 20 [2020-09-25 03:28:42,421 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3186 [2020-09-25 03:28:42,421 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:28:42,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-09-25 03:28:42,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-25 03:28:42,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 94 [2020-09-25 03:28:42,421 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:28:42,728 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 03:28:42,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:28:42,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:42,731 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:28:42,731 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 03:28:42,731 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:28:42,731 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 03:28:42,731 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:28:42,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 03:28:42,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 03:28:42,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 03:28:42,732 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:28:42,742 INFO L134 CoverageAnalysis]: Checked inductivity of 783 backedges. 0 proven. 783 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 03:28:42,743 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [898139214] [2020-09-25 03:28:42,743 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 03:28:42,743 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-09-25 03:28:42,743 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543023900] [2020-09-25 03:28:42,743 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-25 03:28:42,744 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 03:28:42,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-25 03:28:42,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-09-25 03:28:42,744 INFO L87 Difference]: Start difference. First operand 142 states and 178 transitions. Second operand 21 states. [2020-09-25 03:28:42,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 03:28:42,901 INFO L93 Difference]: Finished difference Result 155 states and 193 transitions. [2020-09-25 03:28:42,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-25 03:28:42,902 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 105 [2020-09-25 03:28:42,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 03:28:42,903 INFO L225 Difference]: With dead ends: 155 [2020-09-25 03:28:42,903 INFO L226 Difference]: Without dead ends: 150 [2020-09-25 03:28:42,904 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-09-25 03:28:42,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-09-25 03:28:42,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 149. [2020-09-25 03:28:42,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-09-25 03:28:42,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 187 transitions. [2020-09-25 03:28:42,909 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 187 transitions. Word has length 105 [2020-09-25 03:28:42,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 03:28:42,910 INFO L479 AbstractCegarLoop]: Abstraction has 149 states and 187 transitions. [2020-09-25 03:28:42,910 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-25 03:28:42,910 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 187 transitions. [2020-09-25 03:28:42,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-09-25 03:28:42,911 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 03:28:42,911 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 03:28:42,912 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-09-25 03:28:42,912 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 03:28:42,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 03:28:42,912 INFO L82 PathProgramCache]: Analyzing trace with hash 290610079, now seen corresponding path program 19 times [2020-09-25 03:28:42,912 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 03:28:42,913 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [130656329] [2020-09-25 03:28:42,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 03:28:42,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:28:42,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:42,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:42,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:42,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:42,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:42,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:42,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:43,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:43,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:43,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:43,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:43,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:43,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:43,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:43,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:43,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:43,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:43,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:43,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:43,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:43,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:45,892 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:28:45,893 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 119 [2020-09-25 03:28:45,893 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 21 [2020-09-25 03:28:45,893 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2974 [2020-09-25 03:28:45,893 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:28:45,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-09-25 03:28:45,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-25 03:28:45,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 99 [2020-09-25 03:28:45,894 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:28:46,238 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 03:28:46,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:28:46,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:46,240 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:28:46,240 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 03:28:46,240 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:28:46,240 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 03:28:46,240 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:28:46,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 03:28:46,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 03:28:46,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 03:28:46,241 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:28:46,251 INFO L134 CoverageAnalysis]: Checked inductivity of 874 backedges. 0 proven. 874 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 03:28:46,252 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [130656329] [2020-09-25 03:28:46,252 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 03:28:46,252 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-09-25 03:28:46,252 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004061308] [2020-09-25 03:28:46,253 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-25 03:28:46,253 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 03:28:46,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-25 03:28:46,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-09-25 03:28:46,254 INFO L87 Difference]: Start difference. First operand 149 states and 187 transitions. Second operand 22 states. [2020-09-25 03:28:46,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 03:28:46,436 INFO L93 Difference]: Finished difference Result 162 states and 202 transitions. [2020-09-25 03:28:46,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-25 03:28:46,437 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 110 [2020-09-25 03:28:46,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 03:28:46,438 INFO L225 Difference]: With dead ends: 162 [2020-09-25 03:28:46,438 INFO L226 Difference]: Without dead ends: 157 [2020-09-25 03:28:46,439 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-09-25 03:28:46,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2020-09-25 03:28:46,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 156. [2020-09-25 03:28:46,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-09-25 03:28:46,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 196 transitions. [2020-09-25 03:28:46,445 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 196 transitions. Word has length 110 [2020-09-25 03:28:46,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 03:28:46,445 INFO L479 AbstractCegarLoop]: Abstraction has 156 states and 196 transitions. [2020-09-25 03:28:46,445 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-25 03:28:46,445 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 196 transitions. [2020-09-25 03:28:46,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-09-25 03:28:46,447 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 03:28:46,447 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 03:28:46,447 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-09-25 03:28:46,447 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 03:28:46,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 03:28:46,448 INFO L82 PathProgramCache]: Analyzing trace with hash -15161776, now seen corresponding path program 20 times [2020-09-25 03:28:46,448 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 03:28:46,448 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [135529307] [2020-09-25 03:28:46,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 03:28:46,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:28:46,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:46,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:46,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:46,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:46,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:46,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:46,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:46,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:46,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:46,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:46,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:46,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:46,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:46,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:46,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:47,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:47,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:47,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:47,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:47,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:47,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:47,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:50,602 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:28:50,602 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 124 [2020-09-25 03:28:50,603 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 22 [2020-09-25 03:28:50,603 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4148 [2020-09-25 03:28:50,603 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:28:50,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-09-25 03:28:50,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-25 03:28:50,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 104 [2020-09-25 03:28:50,604 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:28:50,976 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 03:28:50,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:28:50,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:50,979 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:28:50,979 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 03:28:50,980 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:28:50,980 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 03:28:50,980 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:28:50,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 03:28:50,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 03:28:50,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 03:28:50,980 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:28:50,990 INFO L134 CoverageAnalysis]: Checked inductivity of 970 backedges. 0 proven. 970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 03:28:50,990 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [135529307] [2020-09-25 03:28:50,991 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 03:28:50,991 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-09-25 03:28:50,991 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290707462] [2020-09-25 03:28:50,991 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-25 03:28:50,992 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 03:28:50,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-25 03:28:50,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-09-25 03:28:50,993 INFO L87 Difference]: Start difference. First operand 156 states and 196 transitions. Second operand 23 states. [2020-09-25 03:28:51,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 03:28:51,167 INFO L93 Difference]: Finished difference Result 169 states and 211 transitions. [2020-09-25 03:28:51,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-25 03:28:51,168 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 115 [2020-09-25 03:28:51,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 03:28:51,170 INFO L225 Difference]: With dead ends: 169 [2020-09-25 03:28:51,170 INFO L226 Difference]: Without dead ends: 164 [2020-09-25 03:28:51,171 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-09-25 03:28:51,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2020-09-25 03:28:51,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 163. [2020-09-25 03:28:51,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-09-25 03:28:51,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 205 transitions. [2020-09-25 03:28:51,183 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 205 transitions. Word has length 115 [2020-09-25 03:28:51,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 03:28:51,184 INFO L479 AbstractCegarLoop]: Abstraction has 163 states and 205 transitions. [2020-09-25 03:28:51,184 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-25 03:28:51,184 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 205 transitions. [2020-09-25 03:28:51,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2020-09-25 03:28:51,185 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 03:28:51,186 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 03:28:51,186 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-09-25 03:28:51,186 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 03:28:51,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 03:28:51,186 INFO L82 PathProgramCache]: Analyzing trace with hash 834298431, now seen corresponding path program 21 times [2020-09-25 03:28:51,187 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 03:28:51,187 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1637293568] [2020-09-25 03:28:51,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 03:28:51,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:28:51,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:51,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:51,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:51,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:51,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:51,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:51,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:51,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:51,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:51,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:51,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:51,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:51,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:51,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:51,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:51,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:51,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:51,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:51,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:51,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:52,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:52,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:52,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:55,346 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:28:55,346 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 129 [2020-09-25 03:28:55,346 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 23 [2020-09-25 03:28:55,346 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4154 [2020-09-25 03:28:55,347 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:28:55,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-09-25 03:28:55,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-25 03:28:55,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 109 [2020-09-25 03:28:55,347 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:28:55,746 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 03:28:55,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:28:55,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:55,749 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:28:55,749 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 03:28:55,749 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:28:55,749 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 03:28:55,750 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:28:55,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 03:28:55,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 03:28:55,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 03:28:55,750 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:28:55,769 INFO L134 CoverageAnalysis]: Checked inductivity of 1071 backedges. 0 proven. 1071 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 03:28:55,769 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1637293568] [2020-09-25 03:28:55,769 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 03:28:55,769 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-09-25 03:28:55,770 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060089827] [2020-09-25 03:28:55,770 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-25 03:28:55,770 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 03:28:55,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-25 03:28:55,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2020-09-25 03:28:55,771 INFO L87 Difference]: Start difference. First operand 163 states and 205 transitions. Second operand 24 states. [2020-09-25 03:28:55,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 03:28:55,925 INFO L93 Difference]: Finished difference Result 176 states and 220 transitions. [2020-09-25 03:28:55,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-25 03:28:55,925 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 120 [2020-09-25 03:28:55,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 03:28:55,927 INFO L225 Difference]: With dead ends: 176 [2020-09-25 03:28:55,927 INFO L226 Difference]: Without dead ends: 171 [2020-09-25 03:28:55,928 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2020-09-25 03:28:55,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2020-09-25 03:28:55,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 170. [2020-09-25 03:28:55,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2020-09-25 03:28:55,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 214 transitions. [2020-09-25 03:28:55,935 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 214 transitions. Word has length 120 [2020-09-25 03:28:55,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 03:28:55,936 INFO L479 AbstractCegarLoop]: Abstraction has 170 states and 214 transitions. [2020-09-25 03:28:55,936 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-25 03:28:55,936 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 214 transitions. [2020-09-25 03:28:55,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-09-25 03:28:55,937 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 03:28:55,938 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 03:28:55,938 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-09-25 03:28:55,938 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 03:28:55,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 03:28:55,938 INFO L82 PathProgramCache]: Analyzing trace with hash 768328624, now seen corresponding path program 22 times [2020-09-25 03:28:55,939 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 03:28:55,939 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1611125007] [2020-09-25 03:28:55,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 03:28:55,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:28:55,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:55,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:55,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:55,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:56,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:56,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:56,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:56,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:56,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:56,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:56,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:56,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:56,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:56,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:56,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:56,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:56,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:56,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:56,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:56,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:56,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:56,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:56,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:56,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:59,767 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:28:59,767 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 134 [2020-09-25 03:28:59,767 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 24 [2020-09-25 03:28:59,767 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3823 [2020-09-25 03:28:59,768 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:28:59,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-09-25 03:28:59,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-25 03:28:59,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 114 [2020-09-25 03:28:59,768 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:29:00,197 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 03:29:00,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:29:00,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:29:00,199 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:29:00,199 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 03:29:00,199 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:29:00,199 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 03:29:00,200 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:29:00,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 03:29:00,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 03:29:00,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 03:29:00,200 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:29:00,211 INFO L134 CoverageAnalysis]: Checked inductivity of 1177 backedges. 0 proven. 1177 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 03:29:00,211 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1611125007] [2020-09-25 03:29:00,211 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 03:29:00,211 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-09-25 03:29:00,211 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437652855] [2020-09-25 03:29:00,212 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-09-25 03:29:00,212 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 03:29:00,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-09-25 03:29:00,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2020-09-25 03:29:00,213 INFO L87 Difference]: Start difference. First operand 170 states and 214 transitions. Second operand 25 states. [2020-09-25 03:29:00,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 03:29:00,404 INFO L93 Difference]: Finished difference Result 183 states and 229 transitions. [2020-09-25 03:29:00,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-25 03:29:00,405 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 125 [2020-09-25 03:29:00,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 03:29:00,406 INFO L225 Difference]: With dead ends: 183 [2020-09-25 03:29:00,406 INFO L226 Difference]: Without dead ends: 178 [2020-09-25 03:29:00,407 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2020-09-25 03:29:00,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-09-25 03:29:00,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 177. [2020-09-25 03:29:00,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2020-09-25 03:29:00,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 223 transitions. [2020-09-25 03:29:00,414 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 223 transitions. Word has length 125 [2020-09-25 03:29:00,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 03:29:00,414 INFO L479 AbstractCegarLoop]: Abstraction has 177 states and 223 transitions. [2020-09-25 03:29:00,414 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-09-25 03:29:00,414 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 223 transitions. [2020-09-25 03:29:00,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-09-25 03:29:00,416 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 03:29:00,416 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 03:29:00,416 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-09-25 03:29:00,416 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 03:29:00,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 03:29:00,417 INFO L82 PathProgramCache]: Analyzing trace with hash 1531093215, now seen corresponding path program 23 times [2020-09-25 03:29:00,417 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 03:29:00,417 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [166672033] [2020-09-25 03:29:00,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 03:29:00,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:29:00,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:29:00,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:29:00,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:29:00,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:29:00,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:29:00,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:29:00,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:29:00,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:29:00,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:29:00,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:29:00,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:29:00,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:29:00,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:29:00,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:29:00,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:29:00,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:29:00,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:29:00,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:29:00,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:29:00,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:29:00,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:29:00,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:29:01,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:29:01,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:29:01,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:29:04,655 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:29:04,655 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 139 [2020-09-25 03:29:04,655 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 25 [2020-09-25 03:29:04,655 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4232 [2020-09-25 03:29:04,655 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:29:04,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-09-25 03:29:04,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-25 03:29:04,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 119 [2020-09-25 03:29:04,656 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:29:05,119 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 03:29:05,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:29:05,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:29:05,121 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:29:05,121 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 03:29:05,122 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:29:05,122 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 03:29:05,122 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:29:05,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 03:29:05,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 03:29:05,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 03:29:05,122 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:29:05,134 INFO L134 CoverageAnalysis]: Checked inductivity of 1288 backedges. 0 proven. 1288 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 03:29:05,135 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [166672033] [2020-09-25 03:29:05,135 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 03:29:05,135 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-09-25 03:29:05,135 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306598604] [2020-09-25 03:29:05,135 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-09-25 03:29:05,135 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 03:29:05,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-09-25 03:29:05,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2020-09-25 03:29:05,136 INFO L87 Difference]: Start difference. First operand 177 states and 223 transitions. Second operand 26 states. [2020-09-25 03:29:05,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 03:29:05,334 INFO L93 Difference]: Finished difference Result 190 states and 238 transitions. [2020-09-25 03:29:05,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-25 03:29:05,337 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 130 [2020-09-25 03:29:05,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 03:29:05,338 INFO L225 Difference]: With dead ends: 190 [2020-09-25 03:29:05,338 INFO L226 Difference]: Without dead ends: 185 [2020-09-25 03:29:05,339 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2020-09-25 03:29:05,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2020-09-25 03:29:05,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 184. [2020-09-25 03:29:05,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2020-09-25 03:29:05,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 232 transitions. [2020-09-25 03:29:05,345 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 232 transitions. Word has length 130 [2020-09-25 03:29:05,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 03:29:05,346 INFO L479 AbstractCegarLoop]: Abstraction has 184 states and 232 transitions. [2020-09-25 03:29:05,346 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-09-25 03:29:05,346 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 232 transitions. [2020-09-25 03:29:05,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-09-25 03:29:05,347 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 03:29:05,347 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 03:29:05,348 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-09-25 03:29:05,348 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 03:29:05,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 03:29:05,348 INFO L82 PathProgramCache]: Analyzing trace with hash -1765693168, now seen corresponding path program 24 times [2020-09-25 03:29:05,348 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 03:29:05,348 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1116382090] [2020-09-25 03:29:05,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 03:29:05,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:29:05,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:29:05,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:29:05,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:29:05,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:29:05,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:29:05,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:29:05,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:29:05,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:29:05,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:29:05,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:29:05,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:29:05,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:29:05,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:29:05,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:29:05,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:29:05,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:29:05,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:29:05,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:29:05,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:29:05,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:29:05,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:29:05,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:29:05,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:29:06,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:29:06,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:29:06,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:29:10,086 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:29:10,086 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 144 [2020-09-25 03:29:10,087 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 26 [2020-09-25 03:29:10,087 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4732 [2020-09-25 03:29:10,087 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:29:10,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-09-25 03:29:10,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-25 03:29:10,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 124 [2020-09-25 03:29:10,087 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0