/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=NARROWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops-crafted-1/in-de41.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 10:55:45,940 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 10:55:45,943 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 10:55:45,967 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 10:55:45,968 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 10:55:45,969 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 10:55:45,970 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 10:55:45,972 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 10:55:45,973 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 10:55:45,974 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 10:55:45,975 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 10:55:45,976 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 10:55:45,976 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 10:55:45,977 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 10:55:45,978 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 10:55:45,979 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 10:55:45,980 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 10:55:45,981 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 10:55:45,983 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 10:55:45,984 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 10:55:45,986 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 10:55:45,987 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 10:55:45,988 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 10:55:45,989 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 10:55:45,991 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 10:55:45,992 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 10:55:45,992 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 10:55:45,993 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 10:55:45,993 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 10:55:45,994 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 10:55:45,994 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 10:55:45,995 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 10:55:45,996 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 10:55:45,997 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 10:55:45,997 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 10:55:45,998 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 10:55:45,998 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 10:55:45,998 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 10:55:45,999 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 10:55:46,000 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 10:55:46,000 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 10:55:46,001 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-13 10:55:46,037 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 10:55:46,038 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 10:55:46,040 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 10:55:46,040 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 10:55:46,040 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 10:55:46,040 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 10:55:46,041 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 10:55:46,041 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 10:55:46,041 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 10:55:46,041 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 10:55:46,041 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 10:55:46,041 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 10:55:46,042 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 10:55:46,042 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 10:55:46,043 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 10:55:46,043 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 10:55:46,043 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 10:55:46,043 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 10:55:46,043 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 10:55:46,044 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 10:55:46,044 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 10:55:46,044 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 10:55:46,044 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 10:55:46,044 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 10:55:46,045 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 10:55:46,045 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 10:55:46,046 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 10:55:46,046 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 10:55:46,047 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 10:55:46,047 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; [2020-10-13 10:55:46,376 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 10:55:46,389 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 10:55:46,392 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 10:55:46,394 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 10:55:46,394 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 10:55:46,395 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/in-de41.c [2020-10-13 10:55:46,454 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/cd092f906/96ecba632922498c81d4dd429955351f/FLAG0c3ac17ff [2020-10-13 10:55:46,903 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 10:55:46,904 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops-crafted-1/in-de41.c [2020-10-13 10:55:46,910 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/cd092f906/96ecba632922498c81d4dd429955351f/FLAG0c3ac17ff [2020-10-13 10:55:47,295 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/cd092f906/96ecba632922498c81d4dd429955351f [2020-10-13 10:55:47,303 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 10:55:47,305 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 10:55:47,306 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 10:55:47,306 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 10:55:47,309 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 10:55:47,310 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 10:55:47" (1/1) ... [2020-10-13 10:55:47,313 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@770ea115 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:55:47, skipping insertion in model container [2020-10-13 10:55:47,314 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 10:55:47" (1/1) ... [2020-10-13 10:55:47,321 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 10:55:47,339 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 10:55:47,529 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 10:55:47,533 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 10:55:47,548 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 10:55:47,559 INFO L208 MainTranslator]: Completed translation [2020-10-13 10:55:47,560 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:55:47 WrapperNode [2020-10-13 10:55:47,560 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 10:55:47,561 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 10:55:47,561 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 10:55:47,561 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 10:55:47,570 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:55:47" (1/1) ... [2020-10-13 10:55:47,571 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:55:47" (1/1) ... [2020-10-13 10:55:47,660 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:55:47" (1/1) ... [2020-10-13 10:55:47,661 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:55:47" (1/1) ... [2020-10-13 10:55:47,666 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:55:47" (1/1) ... [2020-10-13 10:55:47,675 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:55:47" (1/1) ... [2020-10-13 10:55:47,676 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:55:47" (1/1) ... [2020-10-13 10:55:47,678 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 10:55:47,678 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 10:55:47,678 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 10:55:47,679 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 10:55:47,679 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:55:47" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 10:55:47,732 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 10:55:47,733 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 10:55:47,733 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-13 10:55:47,733 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 10:55:47,733 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 10:55:47,733 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-10-13 10:55:47,733 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-13 10:55:47,733 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 10:55:47,734 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 10:55:47,734 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 10:55:47,934 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 10:55:47,934 INFO L295 CfgBuilder]: Removed 4 assume(true) statements. [2020-10-13 10:55:47,938 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 10:55:47 BoogieIcfgContainer [2020-10-13 10:55:47,938 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 10:55:47,939 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 10:55:47,940 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 10:55:47,943 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 10:55:47,943 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 10:55:47" (1/3) ... [2020-10-13 10:55:47,944 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@689b616e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 10:55:47, skipping insertion in model container [2020-10-13 10:55:47,944 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:55:47" (2/3) ... [2020-10-13 10:55:47,944 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@689b616e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 10:55:47, skipping insertion in model container [2020-10-13 10:55:47,944 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 10:55:47" (3/3) ... [2020-10-13 10:55:47,946 INFO L109 eAbstractionObserver]: Analyzing ICFG in-de41.c [2020-10-13 10:55:47,956 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 10:55:47,963 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 10:55:47,981 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 10:55:48,005 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 10:55:48,006 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 10:55:48,006 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 10:55:48,006 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 10:55:48,006 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 10:55:48,006 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 10:55:48,006 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 10:55:48,007 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 10:55:48,029 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2020-10-13 10:55:48,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-13 10:55:48,036 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:55:48,038 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:55:48,038 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:55:48,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:55:48,048 INFO L82 PathProgramCache]: Analyzing trace with hash 1870796656, now seen corresponding path program 1 times [2020-10-13 10:55:48,064 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:55:48,065 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [580207166] [2020-10-13 10:55:48,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:55:48,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:55:48,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:48,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:48,482 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:55:48,482 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-13 10:55:48,483 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:55:48,483 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 311 [2020-10-13 10:55:48,485 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:55:48,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:55:48,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-13 10:55:48,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:55:48,486 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-13 10:55:48,512 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:55:48,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:55:48,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:48,517 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:55:48,517 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:55:48,518 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:55:48,518 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:55:48,518 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:55:48,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:55:48,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:55:48,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:55:48,520 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:55:48,526 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:55:48,527 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [580207166] [2020-10-13 10:55:48,529 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:55:48,530 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-13 10:55:48,531 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380200051] [2020-10-13 10:55:48,536 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-13 10:55:48,536 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:55:48,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-13 10:55:48,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-13 10:55:48,554 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 2 states. [2020-10-13 10:55:48,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:55:48,580 INFO L93 Difference]: Finished difference Result 38 states and 53 transitions. [2020-10-13 10:55:48,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-13 10:55:48,582 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 14 [2020-10-13 10:55:48,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:55:48,590 INFO L225 Difference]: With dead ends: 38 [2020-10-13 10:55:48,591 INFO L226 Difference]: Without dead ends: 15 [2020-10-13 10:55:48,594 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 [2020-10-13 10:55:48,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-10-13 10:55:48,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-10-13 10:55:48,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-10-13 10:55:48,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 18 transitions. [2020-10-13 10:55:48,631 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 18 transitions. Word has length 14 [2020-10-13 10:55:48,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:55:48,631 INFO L479 AbstractCegarLoop]: Abstraction has 15 states and 18 transitions. [2020-10-13 10:55:48,632 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-13 10:55:48,632 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 18 transitions. [2020-10-13 10:55:48,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-13 10:55:48,632 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:55:48,633 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:55:48,633 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 10:55:48,633 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:55:48,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:55:48,634 INFO L82 PathProgramCache]: Analyzing trace with hash 1867102572, now seen corresponding path program 1 times [2020-10-13 10:55:48,634 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:55:48,635 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2114998153] [2020-10-13 10:55:48,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:55:48,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:55:48,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:48,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:48,949 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:55:48,950 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-13 10:55:48,950 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:55:48,950 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 299 [2020-10-13 10:55:48,951 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:55:48,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 10:55:48,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:55:48,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-13 10:55:48,952 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:55:49,107 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:55:49,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:55:49,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:49,111 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:55:49,111 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:55:49,111 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:55:49,112 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:55:49,112 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:55:49,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:55:49,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:55:49,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:55:49,113 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:55:49,117 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:55:49,118 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2114998153] [2020-10-13 10:55:49,118 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:55:49,119 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-13 10:55:49,119 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800804243] [2020-10-13 10:55:49,121 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 10:55:49,121 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:55:49,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 10:55:49,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-13 10:55:49,122 INFO L87 Difference]: Start difference. First operand 15 states and 18 transitions. Second operand 6 states. [2020-10-13 10:55:49,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:55:49,255 INFO L93 Difference]: Finished difference Result 31 states and 42 transitions. [2020-10-13 10:55:49,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 10:55:49,256 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2020-10-13 10:55:49,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:55:49,258 INFO L225 Difference]: With dead ends: 31 [2020-10-13 10:55:49,259 INFO L226 Difference]: Without dead ends: 25 [2020-10-13 10:55:49,260 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-13 10:55:49,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-10-13 10:55:49,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2020-10-13 10:55:49,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-13 10:55:49,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 30 transitions. [2020-10-13 10:55:49,282 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 30 transitions. Word has length 14 [2020-10-13 10:55:49,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:55:49,282 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 30 transitions. [2020-10-13 10:55:49,282 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 10:55:49,282 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 30 transitions. [2020-10-13 10:55:49,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-13 10:55:49,283 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:55:49,283 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:55:49,284 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 10:55:49,284 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:55:49,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:55:49,284 INFO L82 PathProgramCache]: Analyzing trace with hash 2081142662, now seen corresponding path program 1 times [2020-10-13 10:55:49,285 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:55:49,285 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [239235010] [2020-10-13 10:55:49,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:55:49,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:55:49,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:49,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:49,452 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:55:49,453 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-13 10:55:49,453 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:55:49,454 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 158 [2020-10-13 10:55:49,455 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:55:49,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:55:49,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:55:49,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-13 10:55:49,455 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:55:49,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:55:49,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:55:49,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:49,472 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:55:49,472 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:55:49,473 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:55:49,473 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 10:55:49,473 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:55:49,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:55:49,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:55:49,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:55:49,474 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:55:49,477 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:55:49,477 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [239235010] [2020-10-13 10:55:49,477 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:55:49,477 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 10:55:49,478 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362711541] [2020-10-13 10:55:49,480 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-13 10:55:49,480 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:55:49,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-13 10:55:49,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 10:55:49,482 INFO L87 Difference]: Start difference. First operand 22 states and 30 transitions. Second operand 3 states. [2020-10-13 10:55:49,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:55:49,513 INFO L93 Difference]: Finished difference Result 32 states and 43 transitions. [2020-10-13 10:55:49,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-13 10:55:49,514 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2020-10-13 10:55:49,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:55:49,515 INFO L225 Difference]: With dead ends: 32 [2020-10-13 10:55:49,515 INFO L226 Difference]: Without dead ends: 24 [2020-10-13 10:55:49,517 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 10:55:49,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-10-13 10:55:49,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-10-13 10:55:49,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-13 10:55:49,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 32 transitions. [2020-10-13 10:55:49,531 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 32 transitions. Word has length 15 [2020-10-13 10:55:49,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:55:49,531 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 32 transitions. [2020-10-13 10:55:49,531 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-13 10:55:49,531 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 32 transitions. [2020-10-13 10:55:49,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-13 10:55:49,533 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:55:49,534 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:55:49,535 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 10:55:49,535 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:55:49,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:55:49,536 INFO L82 PathProgramCache]: Analyzing trace with hash -1211614777, now seen corresponding path program 1 times [2020-10-13 10:55:49,536 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:55:49,537 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [394698428] [2020-10-13 10:55:49,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:55:49,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:55:49,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:49,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:49,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:49,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:49,799 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:55:49,799 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-13 10:55:49,799 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 10:55:49,799 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 244 [2020-10-13 10:55:49,800 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:55:49,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 10:55:49,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:55:49,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-13 10:55:49,800 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:55:49,851 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:55:49,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:55:49,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:49,853 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:55:49,853 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:55:49,853 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:55:49,854 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:55:49,854 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:55:49,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:55:49,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:55:49,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:55:49,855 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:55:49,857 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:55:49,857 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [394698428] [2020-10-13 10:55:49,858 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:55:49,858 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 10:55:49,858 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969712890] [2020-10-13 10:55:49,859 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 10:55:49,859 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:55:49,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 10:55:49,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 10:55:49,860 INFO L87 Difference]: Start difference. First operand 24 states and 32 transitions. Second operand 5 states. [2020-10-13 10:55:49,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:55:49,930 INFO L93 Difference]: Finished difference Result 43 states and 60 transitions. [2020-10-13 10:55:49,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 10:55:49,931 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-10-13 10:55:49,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:55:49,933 INFO L225 Difference]: With dead ends: 43 [2020-10-13 10:55:49,934 INFO L226 Difference]: Without dead ends: 34 [2020-10-13 10:55:49,934 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-13 10:55:49,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-13 10:55:49,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 30. [2020-10-13 10:55:49,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-13 10:55:49,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 39 transitions. [2020-10-13 10:55:49,943 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 39 transitions. Word has length 15 [2020-10-13 10:55:49,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:55:49,944 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 39 transitions. [2020-10-13 10:55:49,944 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 10:55:49,944 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 39 transitions. [2020-10-13 10:55:49,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-13 10:55:49,945 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:55:49,945 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:55:49,945 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 10:55:49,946 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:55:49,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:55:49,946 INFO L82 PathProgramCache]: Analyzing trace with hash 162818764, now seen corresponding path program 1 times [2020-10-13 10:55:49,946 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:55:49,947 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1082653738] [2020-10-13 10:55:49,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:55:49,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:55:49,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:49,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:49,997 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:55:49,998 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-13 10:55:49,998 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:55:49,998 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 45 [2020-10-13 10:55:49,998 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:55:49,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 10:55:49,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:55:49,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-13 10:55:50,000 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:55:50,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:55:50,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:55:50,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:50,015 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:55:50,015 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:55:50,015 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:55:50,015 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:55:50,016 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:55:50,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:55:50,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:55:50,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:55:50,017 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:55:50,018 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 10:55:50,019 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1082653738] [2020-10-13 10:55:50,019 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:55:50,019 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 10:55:50,020 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766316131] [2020-10-13 10:55:50,020 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 10:55:50,020 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:55:50,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 10:55:50,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 10:55:50,021 INFO L87 Difference]: Start difference. First operand 30 states and 39 transitions. Second operand 4 states. [2020-10-13 10:55:50,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:55:50,054 INFO L93 Difference]: Finished difference Result 36 states and 45 transitions. [2020-10-13 10:55:50,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 10:55:50,055 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2020-10-13 10:55:50,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:55:50,056 INFO L225 Difference]: With dead ends: 36 [2020-10-13 10:55:50,056 INFO L226 Difference]: Without dead ends: 25 [2020-10-13 10:55:50,057 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 10:55:50,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-10-13 10:55:50,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-10-13 10:55:50,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-13 10:55:50,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 32 transitions. [2020-10-13 10:55:50,064 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 32 transitions. Word has length 16 [2020-10-13 10:55:50,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:55:50,064 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 32 transitions. [2020-10-13 10:55:50,065 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 10:55:50,065 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 32 transitions. [2020-10-13 10:55:50,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-13 10:55:50,066 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:55:50,066 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:55:50,066 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 10:55:50,067 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:55:50,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:55:50,067 INFO L82 PathProgramCache]: Analyzing trace with hash 2132395212, now seen corresponding path program 2 times [2020-10-13 10:55:50,067 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:55:50,068 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [593655358] [2020-10-13 10:55:50,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:55:50,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:55:50,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:50,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:50,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:50,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:50,425 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:55:50,425 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-13 10:55:50,425 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 10:55:50,425 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 347 [2020-10-13 10:55:50,426 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:55:50,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 10:55:50,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:55:50,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 10:55:50,427 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:55:50,484 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:55:50,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:55:50,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:50,487 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:55:50,487 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:55:50,487 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:55:50,487 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:55:50,488 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:55:50,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:55:50,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:55:50,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:55:50,489 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:55:50,490 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:55:50,490 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [593655358] [2020-10-13 10:55:50,491 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:55:50,491 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 10:55:50,491 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237742011] [2020-10-13 10:55:50,492 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 10:55:50,492 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:55:50,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 10:55:50,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-13 10:55:50,493 INFO L87 Difference]: Start difference. First operand 25 states and 32 transitions. Second operand 6 states. [2020-10-13 10:55:50,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:55:50,583 INFO L93 Difference]: Finished difference Result 47 states and 65 transitions. [2020-10-13 10:55:50,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 10:55:50,584 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2020-10-13 10:55:50,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:55:50,585 INFO L225 Difference]: With dead ends: 47 [2020-10-13 10:55:50,585 INFO L226 Difference]: Without dead ends: 38 [2020-10-13 10:55:50,586 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-10-13 10:55:50,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-13 10:55:50,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 30. [2020-10-13 10:55:50,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-13 10:55:50,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 39 transitions. [2020-10-13 10:55:50,592 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 39 transitions. Word has length 16 [2020-10-13 10:55:50,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:55:50,593 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 39 transitions. [2020-10-13 10:55:50,593 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 10:55:50,593 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 39 transitions. [2020-10-13 10:55:50,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-13 10:55:50,594 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:55:50,594 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:55:50,594 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 10:55:50,595 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:55:50,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:55:50,595 INFO L82 PathProgramCache]: Analyzing trace with hash -2144225578, now seen corresponding path program 1 times [2020-10-13 10:55:50,595 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:55:50,595 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1565263004] [2020-10-13 10:55:50,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:55:50,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:55:50,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:50,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:50,659 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:55:50,659 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-13 10:55:50,659 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:55:50,660 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 56 [2020-10-13 10:55:50,660 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:55:50,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 10:55:50,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 10:55:50,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 10:55:50,661 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:55:50,701 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:55:50,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:55:50,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:50,705 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:55:50,705 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:55:50,705 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:55:50,705 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:55:50,706 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:55:50,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:55:50,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:55:50,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:55:50,706 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:55:50,711 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-13 10:55:50,712 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1565263004] [2020-10-13 10:55:50,712 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:55:50,712 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-10-13 10:55:50,713 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175062879] [2020-10-13 10:55:50,713 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 10:55:50,714 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:55:50,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 10:55:50,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 10:55:50,714 INFO L87 Difference]: Start difference. First operand 30 states and 39 transitions. Second operand 4 states. [2020-10-13 10:55:50,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:55:50,750 INFO L93 Difference]: Finished difference Result 43 states and 56 transitions. [2020-10-13 10:55:50,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 10:55:50,752 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2020-10-13 10:55:50,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:55:50,753 INFO L225 Difference]: With dead ends: 43 [2020-10-13 10:55:50,753 INFO L226 Difference]: Without dead ends: 38 [2020-10-13 10:55:50,753 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 10:55:50,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-13 10:55:50,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2020-10-13 10:55:50,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-13 10:55:50,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 51 transitions. [2020-10-13 10:55:50,765 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 51 transitions. Word has length 17 [2020-10-13 10:55:50,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:55:50,766 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 51 transitions. [2020-10-13 10:55:50,766 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 10:55:50,766 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 51 transitions. [2020-10-13 10:55:50,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-13 10:55:50,768 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:55:50,768 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:55:50,769 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 10:55:50,769 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:55:50,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:55:50,769 INFO L82 PathProgramCache]: Analyzing trace with hash -1577477529, now seen corresponding path program 3 times [2020-10-13 10:55:50,770 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:55:50,770 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1829168220] [2020-10-13 10:55:50,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:55:50,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:55:50,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:50,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:50,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:50,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:51,237 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:55:51,238 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-13 10:55:51,238 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 10:55:51,238 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 454 [2020-10-13 10:55:51,238 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:55:51,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 10:55:51,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:55:51,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 10:55:51,239 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:55:51,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:55:51,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:55:51,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:51,329 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:55:51,329 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:55:51,330 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:55:51,330 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:55:51,330 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:55:51,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:55:51,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:55:51,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:55:51,332 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:55:51,333 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:55:51,333 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1829168220] [2020-10-13 10:55:51,334 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:55:51,334 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-13 10:55:51,334 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488491912] [2020-10-13 10:55:51,335 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 10:55:51,336 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:55:51,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 10:55:51,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-13 10:55:51,336 INFO L87 Difference]: Start difference. First operand 38 states and 51 transitions. Second operand 7 states. [2020-10-13 10:55:51,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:55:51,481 INFO L93 Difference]: Finished difference Result 71 states and 103 transitions. [2020-10-13 10:55:51,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 10:55:51,482 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 17 [2020-10-13 10:55:51,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:55:51,483 INFO L225 Difference]: With dead ends: 71 [2020-10-13 10:55:51,483 INFO L226 Difference]: Without dead ends: 60 [2020-10-13 10:55:51,485 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-13 10:55:51,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-13 10:55:51,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 45. [2020-10-13 10:55:51,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-13 10:55:51,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 61 transitions. [2020-10-13 10:55:51,497 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 61 transitions. Word has length 17 [2020-10-13 10:55:51,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:55:51,501 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 61 transitions. [2020-10-13 10:55:51,501 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 10:55:51,501 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 61 transitions. [2020-10-13 10:55:51,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-13 10:55:51,502 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:55:51,504 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:55:51,505 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 10:55:51,505 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:55:51,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:55:51,505 INFO L82 PathProgramCache]: Analyzing trace with hash -2010945700, now seen corresponding path program 1 times [2020-10-13 10:55:51,506 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:55:51,506 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [973509576] [2020-10-13 10:55:51,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:55:51,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:55:51,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:51,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:51,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:51,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:51,888 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:55:51,888 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-13 10:55:51,888 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 10:55:51,888 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 371 [2020-10-13 10:55:51,888 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:55:51,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 10:55:51,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:55:51,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-13 10:55:51,889 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:55:52,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:55:52,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:55:52,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:52,213 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:55:52,214 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:55:52,214 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:55:52,214 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:55:52,214 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:55:52,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:55:52,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:55:52,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:55:52,215 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:55:52,218 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:55:52,219 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [973509576] [2020-10-13 10:55:52,219 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:55:52,220 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 10:55:52,220 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882652963] [2020-10-13 10:55:52,220 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 10:55:52,221 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:55:52,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 10:55:52,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-10-13 10:55:52,222 INFO L87 Difference]: Start difference. First operand 45 states and 61 transitions. Second operand 10 states. [2020-10-13 10:55:52,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:55:52,507 INFO L93 Difference]: Finished difference Result 55 states and 71 transitions. [2020-10-13 10:55:52,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 10:55:52,508 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2020-10-13 10:55:52,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:55:52,509 INFO L225 Difference]: With dead ends: 55 [2020-10-13 10:55:52,509 INFO L226 Difference]: Without dead ends: 50 [2020-10-13 10:55:52,510 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2020-10-13 10:55:52,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-13 10:55:52,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 48. [2020-10-13 10:55:52,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-13 10:55:52,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 64 transitions. [2020-10-13 10:55:52,517 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 64 transitions. Word has length 18 [2020-10-13 10:55:52,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:55:52,517 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 64 transitions. [2020-10-13 10:55:52,517 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 10:55:52,517 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 64 transitions. [2020-10-13 10:55:52,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-13 10:55:52,518 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:55:52,518 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:55:52,519 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 10:55:52,519 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:55:52,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:55:52,519 INFO L82 PathProgramCache]: Analyzing trace with hash -1109756806, now seen corresponding path program 2 times [2020-10-13 10:55:52,520 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:55:52,520 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [368661577] [2020-10-13 10:55:52,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:55:52,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:55:52,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:52,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:52,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:52,921 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:55:52,922 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-13 10:55:52,922 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:55:52,922 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 395 [2020-10-13 10:55:52,922 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:55:52,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 10:55:52,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-13 10:55:52,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 10:55:52,923 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:55:52,991 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:55:52,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:55:52,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:52,994 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:55:52,994 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:55:52,994 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:55:52,995 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:55:52,995 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:55:52,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:55:52,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:55:52,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:55:52,996 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:55:52,998 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 10:55:52,999 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [368661577] [2020-10-13 10:55:52,999 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:55:52,999 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 10:55:53,000 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477358462] [2020-10-13 10:55:53,000 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 10:55:53,000 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:55:53,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 10:55:53,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-13 10:55:53,001 INFO L87 Difference]: Start difference. First operand 48 states and 64 transitions. Second operand 6 states. [2020-10-13 10:55:53,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:55:53,112 INFO L93 Difference]: Finished difference Result 71 states and 93 transitions. [2020-10-13 10:55:53,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-13 10:55:53,113 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2020-10-13 10:55:53,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:55:53,114 INFO L225 Difference]: With dead ends: 71 [2020-10-13 10:55:53,114 INFO L226 Difference]: Without dead ends: 60 [2020-10-13 10:55:53,115 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-13 10:55:53,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-13 10:55:53,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 52. [2020-10-13 10:55:53,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-13 10:55:53,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 67 transitions. [2020-10-13 10:55:53,122 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 67 transitions. Word has length 18 [2020-10-13 10:55:53,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:55:53,123 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 67 transitions. [2020-10-13 10:55:53,123 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 10:55:53,123 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 67 transitions. [2020-10-13 10:55:53,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-13 10:55:53,124 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:55:53,124 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:55:53,124 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 10:55:53,124 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:55:53,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:55:53,125 INFO L82 PathProgramCache]: Analyzing trace with hash -619415508, now seen corresponding path program 4 times [2020-10-13 10:55:53,125 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:55:53,125 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1029441478] [2020-10-13 10:55:53,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:55:53,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:55:53,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:53,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:53,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:53,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:53,644 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:55:53,644 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-13 10:55:53,644 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 10:55:53,644 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 511 [2020-10-13 10:55:53,645 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:55:53,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 10:55:53,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:55:53,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 10:55:53,645 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:55:53,724 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:55:53,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:55:53,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:53,726 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:55:53,726 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:55:53,726 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:55:53,726 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:55:53,727 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:55:53,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:55:53,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:55:53,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:55:53,727 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:55:53,729 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:55:53,729 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1029441478] [2020-10-13 10:55:53,730 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:55:53,730 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 10:55:53,730 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212638685] [2020-10-13 10:55:53,731 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 10:55:53,731 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:55:53,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 10:55:53,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-13 10:55:53,731 INFO L87 Difference]: Start difference. First operand 52 states and 67 transitions. Second operand 8 states. [2020-10-13 10:55:53,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:55:53,881 INFO L93 Difference]: Finished difference Result 92 states and 127 transitions. [2020-10-13 10:55:53,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-13 10:55:53,882 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 18 [2020-10-13 10:55:53,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:55:53,883 INFO L225 Difference]: With dead ends: 92 [2020-10-13 10:55:53,883 INFO L226 Difference]: Without dead ends: 79 [2020-10-13 10:55:53,884 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-13 10:55:53,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-13 10:55:53,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 59. [2020-10-13 10:55:53,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-13 10:55:53,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 77 transitions. [2020-10-13 10:55:53,892 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 77 transitions. Word has length 18 [2020-10-13 10:55:53,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:55:53,892 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 77 transitions. [2020-10-13 10:55:53,892 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 10:55:53,892 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 77 transitions. [2020-10-13 10:55:53,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-13 10:55:53,893 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:55:53,893 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:55:53,894 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 10:55:53,894 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:55:53,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:55:53,894 INFO L82 PathProgramCache]: Analyzing trace with hash 2120730518, now seen corresponding path program 2 times [2020-10-13 10:55:53,895 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:55:53,895 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1769622607] [2020-10-13 10:55:53,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:55:53,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:55:53,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:53,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:54,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:54,155 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:55:54,155 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-13 10:55:54,155 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:55:54,156 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 251 [2020-10-13 10:55:54,156 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:55:54,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 10:55:54,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 10:55:54,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 10:55:54,157 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:55:54,184 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:55:54,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:55:54,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:54,186 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:55:54,186 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:55:54,187 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:55:54,187 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:55:54,187 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:55:54,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:55:54,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:55:54,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:55:54,188 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:55:54,190 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-13 10:55:54,190 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1769622607] [2020-10-13 10:55:54,190 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:55:54,191 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-10-13 10:55:54,191 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902986204] [2020-10-13 10:55:54,191 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 10:55:54,191 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:55:54,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 10:55:54,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 10:55:54,192 INFO L87 Difference]: Start difference. First operand 59 states and 77 transitions. Second operand 4 states. [2020-10-13 10:55:54,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:55:54,221 INFO L93 Difference]: Finished difference Result 67 states and 86 transitions. [2020-10-13 10:55:54,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 10:55:54,221 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2020-10-13 10:55:54,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:55:54,222 INFO L225 Difference]: With dead ends: 67 [2020-10-13 10:55:54,222 INFO L226 Difference]: Without dead ends: 54 [2020-10-13 10:55:54,223 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 10:55:54,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-13 10:55:54,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2020-10-13 10:55:54,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-13 10:55:54,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 70 transitions. [2020-10-13 10:55:54,229 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 70 transitions. Word has length 19 [2020-10-13 10:55:54,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:55:54,230 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 70 transitions. [2020-10-13 10:55:54,230 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 10:55:54,230 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 70 transitions. [2020-10-13 10:55:54,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-13 10:55:54,231 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:55:54,231 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:55:54,231 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-13 10:55:54,231 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:55:54,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:55:54,232 INFO L82 PathProgramCache]: Analyzing trace with hash -984263929, now seen corresponding path program 5 times [2020-10-13 10:55:54,232 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:55:54,232 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1360347831] [2020-10-13 10:55:54,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:55:54,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:55:54,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:54,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:54,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:54,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:54,848 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:55:54,848 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-13 10:55:54,849 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 10:55:54,849 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 607 [2020-10-13 10:55:54,849 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:55:54,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 10:55:54,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:55:54,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-13 10:55:54,850 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:55:54,948 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:55:54,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:55:54,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:54,950 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:55:54,950 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:55:54,950 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:55:54,950 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:55:54,951 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:55:54,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:55:54,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:55:54,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:55:54,952 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:55:54,953 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:55:54,954 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1360347831] [2020-10-13 10:55:54,954 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:55:54,954 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 10:55:54,954 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914215086] [2020-10-13 10:55:54,955 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 10:55:54,955 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:55:54,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 10:55:54,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-13 10:55:54,956 INFO L87 Difference]: Start difference. First operand 53 states and 70 transitions. Second operand 9 states. [2020-10-13 10:55:55,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:55:55,160 INFO L93 Difference]: Finished difference Result 97 states and 137 transitions. [2020-10-13 10:55:55,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 10:55:55,161 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 19 [2020-10-13 10:55:55,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:55:55,162 INFO L225 Difference]: With dead ends: 97 [2020-10-13 10:55:55,162 INFO L226 Difference]: Without dead ends: 84 [2020-10-13 10:55:55,163 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-13 10:55:55,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-13 10:55:55,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 60. [2020-10-13 10:55:55,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-13 10:55:55,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 80 transitions. [2020-10-13 10:55:55,169 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 80 transitions. Word has length 19 [2020-10-13 10:55:55,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:55:55,170 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 80 transitions. [2020-10-13 10:55:55,170 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 10:55:55,170 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 80 transitions. [2020-10-13 10:55:55,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-13 10:55:55,171 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:55:55,171 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:55:55,172 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-13 10:55:55,172 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:55:55,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:55:55,172 INFO L82 PathProgramCache]: Analyzing trace with hash -61628532, now seen corresponding path program 3 times [2020-10-13 10:55:55,172 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:55:55,173 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1354150502] [2020-10-13 10:55:55,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:55:55,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:55:55,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:55,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:55,394 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:55:55,395 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-13 10:55:55,395 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:55:55,395 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 214 [2020-10-13 10:55:55,396 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:55:55,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 10:55:55,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-13 10:55:55,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-13 10:55:55,396 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:55:55,484 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:55:55,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:55:55,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:55,486 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:55:55,486 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:55:55,486 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:55:55,486 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:55:55,486 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:55:55,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:55:55,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:55:55,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:55:55,487 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:55:55,489 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-13 10:55:55,489 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1354150502] [2020-10-13 10:55:55,489 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:55:55,490 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 10:55:55,490 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298141803] [2020-10-13 10:55:55,490 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 10:55:55,490 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:55:55,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 10:55:55,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-13 10:55:55,491 INFO L87 Difference]: Start difference. First operand 60 states and 80 transitions. Second operand 6 states. [2020-10-13 10:55:55,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:55:55,563 INFO L93 Difference]: Finished difference Result 80 states and 102 transitions. [2020-10-13 10:55:55,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 10:55:55,564 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2020-10-13 10:55:55,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:55:55,565 INFO L225 Difference]: With dead ends: 80 [2020-10-13 10:55:55,565 INFO L226 Difference]: Without dead ends: 58 [2020-10-13 10:55:55,565 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2020-10-13 10:55:55,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-13 10:55:55,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 52. [2020-10-13 10:55:55,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-13 10:55:55,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 65 transitions. [2020-10-13 10:55:55,572 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 65 transitions. Word has length 20 [2020-10-13 10:55:55,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:55:55,572 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 65 transitions. [2020-10-13 10:55:55,572 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 10:55:55,572 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 65 transitions. [2020-10-13 10:55:55,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-13 10:55:55,573 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:55:55,573 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:55:55,573 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-13 10:55:55,574 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:55:55,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:55:55,574 INFO L82 PathProgramCache]: Analyzing trace with hash -1324722900, now seen corresponding path program 3 times [2020-10-13 10:55:55,574 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:55:55,575 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [11325773] [2020-10-13 10:55:55,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:55:55,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:55:55,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:55,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:55,680 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:55:55,680 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-13 10:55:55,680 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:55:55,681 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 97 [2020-10-13 10:55:55,681 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:55:55,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 10:55:55,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-13 10:55:55,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-13 10:55:55,682 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:55:55,728 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:55:55,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:55:55,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:55,730 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:55:55,730 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:55:55,730 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:55:55,731 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:55:55,731 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:55:55,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:55:55,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:55:55,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:55:55,732 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:55:55,733 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-13 10:55:55,734 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [11325773] [2020-10-13 10:55:55,734 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:55:55,734 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 10:55:55,734 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76310484] [2020-10-13 10:55:55,735 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 10:55:55,735 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:55:55,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 10:55:55,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 10:55:55,736 INFO L87 Difference]: Start difference. First operand 52 states and 65 transitions. Second operand 5 states. [2020-10-13 10:55:55,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:55:55,793 INFO L93 Difference]: Finished difference Result 72 states and 91 transitions. [2020-10-13 10:55:55,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 10:55:55,794 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2020-10-13 10:55:55,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:55:55,795 INFO L225 Difference]: With dead ends: 72 [2020-10-13 10:55:55,795 INFO L226 Difference]: Without dead ends: 67 [2020-10-13 10:55:55,796 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 10:55:55,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-13 10:55:55,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2020-10-13 10:55:55,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-13 10:55:55,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 86 transitions. [2020-10-13 10:55:55,803 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 86 transitions. Word has length 20 [2020-10-13 10:55:55,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:55:55,803 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 86 transitions. [2020-10-13 10:55:55,803 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 10:55:55,803 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 86 transitions. [2020-10-13 10:55:55,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-13 10:55:55,804 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:55:55,804 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:55:55,805 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-13 10:55:55,805 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:55:55,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:55:55,805 INFO L82 PathProgramCache]: Analyzing trace with hash 590336908, now seen corresponding path program 6 times [2020-10-13 10:55:55,805 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:55:55,806 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [649816060] [2020-10-13 10:55:55,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:55:55,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:55:55,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:55,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:55,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:55,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:56,545 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:55:56,546 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-13 10:55:56,546 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 10:55:56,546 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 730 [2020-10-13 10:55:56,547 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:55:56,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 10:55:56,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:55:56,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-13 10:55:56,548 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:55:56,692 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:55:56,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:55:56,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:56,695 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:55:56,695 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:55:56,696 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:55:56,696 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:55:56,696 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:55:56,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:55:56,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:55:56,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:55:56,698 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:55:56,699 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:55:56,700 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [649816060] [2020-10-13 10:55:56,700 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:55:56,700 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 10:55:56,701 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877667357] [2020-10-13 10:55:56,701 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 10:55:56,701 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:55:56,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 10:55:56,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-13 10:55:56,702 INFO L87 Difference]: Start difference. First operand 67 states and 86 transitions. Second operand 10 states. [2020-10-13 10:55:56,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:55:56,948 INFO L93 Difference]: Finished difference Result 116 states and 159 transitions. [2020-10-13 10:55:56,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 10:55:56,949 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 20 [2020-10-13 10:55:56,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:55:56,950 INFO L225 Difference]: With dead ends: 116 [2020-10-13 10:55:56,950 INFO L226 Difference]: Without dead ends: 102 [2020-10-13 10:55:56,950 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-10-13 10:55:56,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-13 10:55:56,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 75. [2020-10-13 10:55:56,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-13 10:55:56,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 97 transitions. [2020-10-13 10:55:56,958 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 97 transitions. Word has length 20 [2020-10-13 10:55:56,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:55:56,958 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 97 transitions. [2020-10-13 10:55:56,958 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 10:55:56,958 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 97 transitions. [2020-10-13 10:55:56,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-13 10:55:56,959 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:55:56,959 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:55:56,959 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-13 10:55:56,960 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:55:56,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:55:56,960 INFO L82 PathProgramCache]: Analyzing trace with hash 1918800838, now seen corresponding path program 4 times [2020-10-13 10:55:56,960 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:55:56,961 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [216636016] [2020-10-13 10:55:56,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:55:56,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:55:56,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:57,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:57,122 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:55:57,122 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-13 10:55:57,122 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:55:57,122 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 153 [2020-10-13 10:55:57,123 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:55:57,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 10:55:57,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-13 10:55:57,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-13 10:55:57,123 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:55:57,177 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:55:57,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:55:57,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:57,179 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:55:57,179 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:55:57,179 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:55:57,180 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:55:57,180 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:55:57,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:55:57,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:55:57,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:55:57,181 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:55:57,182 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-13 10:55:57,183 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [216636016] [2020-10-13 10:55:57,183 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:55:57,183 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 10:55:57,184 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202117160] [2020-10-13 10:55:57,184 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 10:55:57,184 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:55:57,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 10:55:57,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-13 10:55:57,185 INFO L87 Difference]: Start difference. First operand 75 states and 97 transitions. Second operand 6 states. [2020-10-13 10:55:57,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:55:57,239 INFO L93 Difference]: Finished difference Result 100 states and 132 transitions. [2020-10-13 10:55:57,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 10:55:57,240 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2020-10-13 10:55:57,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:55:57,240 INFO L225 Difference]: With dead ends: 100 [2020-10-13 10:55:57,241 INFO L226 Difference]: Without dead ends: 94 [2020-10-13 10:55:57,241 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-13 10:55:57,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-13 10:55:57,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 92. [2020-10-13 10:55:57,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-13 10:55:57,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 121 transitions. [2020-10-13 10:55:57,249 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 121 transitions. Word has length 21 [2020-10-13 10:55:57,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:55:57,249 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 121 transitions. [2020-10-13 10:55:57,250 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 10:55:57,250 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 121 transitions. [2020-10-13 10:55:57,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-13 10:55:57,250 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:55:57,251 INFO L422 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:55:57,251 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-13 10:55:57,251 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:55:57,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:55:57,251 INFO L82 PathProgramCache]: Analyzing trace with hash -2136644697, now seen corresponding path program 7 times [2020-10-13 10:55:57,252 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:55:57,252 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [993948274] [2020-10-13 10:55:57,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:55:57,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:55:57,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:57,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:57,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:57,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:58,310 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:55:58,311 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-13 10:55:58,311 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 10:55:58,311 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1051 [2020-10-13 10:55:58,311 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:55:58,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 10:55:58,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:55:58,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-13 10:55:58,312 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:55:58,440 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:55:58,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:55:58,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:58,442 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:55:58,442 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:55:58,443 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:55:58,443 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:55:58,443 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:55:58,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:55:58,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:55:58,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:55:58,444 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:55:58,446 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:55:58,446 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [993948274] [2020-10-13 10:55:58,446 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:55:58,446 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-13 10:55:58,447 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393816850] [2020-10-13 10:55:58,447 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 10:55:58,447 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:55:58,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 10:55:58,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-13 10:55:58,448 INFO L87 Difference]: Start difference. First operand 92 states and 121 transitions. Second operand 11 states. [2020-10-13 10:55:58,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:55:58,760 INFO L93 Difference]: Finished difference Result 159 states and 223 transitions. [2020-10-13 10:55:58,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 10:55:58,761 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 21 [2020-10-13 10:55:58,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:55:58,762 INFO L225 Difference]: With dead ends: 159 [2020-10-13 10:55:58,763 INFO L226 Difference]: Without dead ends: 143 [2020-10-13 10:55:58,764 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-10-13 10:55:58,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-10-13 10:55:58,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 102. [2020-10-13 10:55:58,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-13 10:55:58,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 135 transitions. [2020-10-13 10:55:58,775 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 135 transitions. Word has length 21 [2020-10-13 10:55:58,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:55:58,776 INFO L479 AbstractCegarLoop]: Abstraction has 102 states and 135 transitions. [2020-10-13 10:55:58,776 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 10:55:58,776 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 135 transitions. [2020-10-13 10:55:58,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-13 10:55:58,777 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:55:58,777 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:55:58,777 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-13 10:55:58,777 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:55:58,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:55:58,778 INFO L82 PathProgramCache]: Analyzing trace with hash -611178388, now seen corresponding path program 5 times [2020-10-13 10:55:58,778 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:55:58,778 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2079718767] [2020-10-13 10:55:58,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:55:58,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:55:58,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:58,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:58,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:59,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:59,400 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:55:59,400 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-13 10:55:59,400 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 10:55:59,400 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 602 [2020-10-13 10:55:59,401 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:55:59,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-13 10:55:59,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:55:59,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-13 10:55:59,401 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:55:59,609 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:55:59,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:55:59,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:59,611 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:55:59,611 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:55:59,611 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:55:59,612 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:55:59,612 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:55:59,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:55:59,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:55:59,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:55:59,613 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:55:59,615 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-13 10:55:59,615 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2079718767] [2020-10-13 10:55:59,615 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:55:59,616 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 10:55:59,616 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750463497] [2020-10-13 10:55:59,616 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 10:55:59,624 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:55:59,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 10:55:59,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-13 10:55:59,625 INFO L87 Difference]: Start difference. First operand 102 states and 135 transitions. Second operand 9 states. [2020-10-13 10:55:59,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:55:59,990 INFO L93 Difference]: Finished difference Result 137 states and 170 transitions. [2020-10-13 10:55:59,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 10:55:59,991 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 22 [2020-10-13 10:55:59,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:55:59,992 INFO L225 Difference]: With dead ends: 137 [2020-10-13 10:55:59,992 INFO L226 Difference]: Without dead ends: 122 [2020-10-13 10:55:59,993 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2020-10-13 10:55:59,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-10-13 10:56:00,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 100. [2020-10-13 10:56:00,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-13 10:56:00,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 130 transitions. [2020-10-13 10:56:00,009 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 130 transitions. Word has length 22 [2020-10-13 10:56:00,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:56:00,009 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 130 transitions. [2020-10-13 10:56:00,009 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 10:56:00,009 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 130 transitions. [2020-10-13 10:56:00,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-13 10:56:00,013 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:56:00,013 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:56:00,013 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-13 10:56:00,013 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:56:00,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:56:00,014 INFO L82 PathProgramCache]: Analyzing trace with hash -1112398132, now seen corresponding path program 6 times [2020-10-13 10:56:00,014 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:56:00,014 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1034348630] [2020-10-13 10:56:00,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:56:00,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:56:00,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:00,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:00,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:00,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:01,184 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:56:01,184 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-13 10:56:01,185 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 10:56:01,185 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1157 [2020-10-13 10:56:01,185 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:56:01,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 10:56:01,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-13 10:56:01,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 10:56:01,186 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:56:01,283 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:56:01,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:56:01,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:01,285 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:56:01,286 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:56:01,286 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:56:01,286 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:56:01,286 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:56:01,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:56:01,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:56:01,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:56:01,287 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:56:01,289 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-13 10:56:01,290 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1034348630] [2020-10-13 10:56:01,290 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:56:01,290 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 10:56:01,290 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549400265] [2020-10-13 10:56:01,290 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 10:56:01,291 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:56:01,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 10:56:01,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-10-13 10:56:01,291 INFO L87 Difference]: Start difference. First operand 100 states and 130 transitions. Second operand 8 states. [2020-10-13 10:56:01,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:56:01,458 INFO L93 Difference]: Finished difference Result 147 states and 179 transitions. [2020-10-13 10:56:01,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-13 10:56:01,459 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 22 [2020-10-13 10:56:01,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:56:01,460 INFO L225 Difference]: With dead ends: 147 [2020-10-13 10:56:01,460 INFO L226 Difference]: Without dead ends: 128 [2020-10-13 10:56:01,461 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-10-13 10:56:01,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-13 10:56:01,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 96. [2020-10-13 10:56:01,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-13 10:56:01,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 123 transitions. [2020-10-13 10:56:01,474 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 123 transitions. Word has length 22 [2020-10-13 10:56:01,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:56:01,474 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 123 transitions. [2020-10-13 10:56:01,474 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 10:56:01,474 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 123 transitions. [2020-10-13 10:56:01,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-13 10:56:01,475 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:56:01,475 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:56:01,475 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-13 10:56:01,475 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:56:01,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:56:01,476 INFO L82 PathProgramCache]: Analyzing trace with hash 1859614010, now seen corresponding path program 7 times [2020-10-13 10:56:01,476 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:56:01,476 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2107655341] [2020-10-13 10:56:01,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:56:01,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:56:01,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:01,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:02,008 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:56:02,008 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-13 10:56:02,009 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:56:02,009 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 523 [2020-10-13 10:56:02,009 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:56:02,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 10:56:02,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-13 10:56:02,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 10:56:02,010 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:56:02,093 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:56:02,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:56:02,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:02,095 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:56:02,095 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:56:02,096 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:56:02,096 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:56:02,096 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:56:02,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:56:02,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:56:02,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:56:02,097 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:56:02,100 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-13 10:56:02,100 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2107655341] [2020-10-13 10:56:02,100 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:56:02,100 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 10:56:02,101 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327740017] [2020-10-13 10:56:02,101 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 10:56:02,101 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:56:02,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 10:56:02,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-13 10:56:02,102 INFO L87 Difference]: Start difference. First operand 96 states and 123 transitions. Second operand 8 states. [2020-10-13 10:56:02,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:56:02,263 INFO L93 Difference]: Finished difference Result 119 states and 148 transitions. [2020-10-13 10:56:02,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 10:56:02,264 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 24 [2020-10-13 10:56:02,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:56:02,265 INFO L225 Difference]: With dead ends: 119 [2020-10-13 10:56:02,265 INFO L226 Difference]: Without dead ends: 87 [2020-10-13 10:56:02,266 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-10-13 10:56:02,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-13 10:56:02,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 81. [2020-10-13 10:56:02,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-13 10:56:02,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 101 transitions. [2020-10-13 10:56:02,282 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 101 transitions. Word has length 24 [2020-10-13 10:56:02,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:56:02,282 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 101 transitions. [2020-10-13 10:56:02,282 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 10:56:02,282 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 101 transitions. [2020-10-13 10:56:02,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-13 10:56:02,283 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:56:02,283 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:56:02,283 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-13 10:56:02,283 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:56:02,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:56:02,284 INFO L82 PathProgramCache]: Analyzing trace with hash 246350748, now seen corresponding path program 8 times [2020-10-13 10:56:02,284 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:56:02,287 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1520628347] [2020-10-13 10:56:02,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:56:02,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:56:02,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:02,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:02,549 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:56:02,550 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-13 10:56:02,550 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:56:02,550 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 249 [2020-10-13 10:56:02,550 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:56:02,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 10:56:02,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-13 10:56:02,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-13 10:56:02,551 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:56:02,627 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:56:02,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:56:02,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:02,631 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:56:02,632 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:56:02,632 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:56:02,633 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:56:02,633 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:56:02,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:56:02,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:56:02,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:56:02,634 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:56:02,636 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-13 10:56:02,637 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1520628347] [2020-10-13 10:56:02,637 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:56:02,637 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-13 10:56:02,638 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027480291] [2020-10-13 10:56:02,638 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 10:56:02,640 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:56:02,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 10:56:02,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-10-13 10:56:02,641 INFO L87 Difference]: Start difference. First operand 81 states and 101 transitions. Second operand 7 states. [2020-10-13 10:56:02,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:56:02,738 INFO L93 Difference]: Finished difference Result 109 states and 140 transitions. [2020-10-13 10:56:02,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 10:56:02,741 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 24 [2020-10-13 10:56:02,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:56:02,742 INFO L225 Difference]: With dead ends: 109 [2020-10-13 10:56:02,742 INFO L226 Difference]: Without dead ends: 103 [2020-10-13 10:56:02,743 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-10-13 10:56:02,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-13 10:56:02,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2020-10-13 10:56:02,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-10-13 10:56:02,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 130 transitions. [2020-10-13 10:56:02,759 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 130 transitions. Word has length 24 [2020-10-13 10:56:02,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:56:02,760 INFO L479 AbstractCegarLoop]: Abstraction has 103 states and 130 transitions. [2020-10-13 10:56:02,760 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 10:56:02,760 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 130 transitions. [2020-10-13 10:56:02,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-13 10:56:02,760 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:56:02,760 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:56:02,761 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-13 10:56:02,761 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:56:02,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:56:02,761 INFO L82 PathProgramCache]: Analyzing trace with hash 1764180408, now seen corresponding path program 9 times [2020-10-13 10:56:02,761 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:56:02,767 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1683523174] [2020-10-13 10:56:02,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:56:02,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:56:02,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:02,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:02,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:03,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:05,435 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:56:05,436 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-13 10:56:05,436 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 10:56:05,436 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2653 [2020-10-13 10:56:05,436 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:56:05,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 10:56:05,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:56:05,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-13 10:56:05,437 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:56:05,571 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:56:05,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:56:05,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:05,573 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:56:05,573 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:56:05,573 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:56:05,574 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:56:05,574 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:56:05,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:56:05,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:56:05,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:56:05,575 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:56:05,578 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-13 10:56:05,581 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1683523174] [2020-10-13 10:56:05,583 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:56:05,584 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 10:56:05,584 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589222445] [2020-10-13 10:56:05,585 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 10:56:05,585 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:56:05,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 10:56:05,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-13 10:56:05,586 INFO L87 Difference]: Start difference. First operand 103 states and 130 transitions. Second operand 10 states. [2020-10-13 10:56:05,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:56:05,858 INFO L93 Difference]: Finished difference Result 127 states and 154 transitions. [2020-10-13 10:56:05,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-13 10:56:05,859 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 25 [2020-10-13 10:56:05,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:56:05,860 INFO L225 Difference]: With dead ends: 127 [2020-10-13 10:56:05,860 INFO L226 Difference]: Without dead ends: 110 [2020-10-13 10:56:05,861 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2020-10-13 10:56:05,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-10-13 10:56:05,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 101. [2020-10-13 10:56:05,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-13 10:56:05,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 125 transitions. [2020-10-13 10:56:05,875 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 125 transitions. Word has length 25 [2020-10-13 10:56:05,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:56:05,875 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 125 transitions. [2020-10-13 10:56:05,875 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 10:56:05,875 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 125 transitions. [2020-10-13 10:56:05,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-13 10:56:05,876 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:56:05,876 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:56:05,876 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-13 10:56:05,876 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:56:05,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:56:05,877 INFO L82 PathProgramCache]: Analyzing trace with hash 1657076444, now seen corresponding path program 10 times [2020-10-13 10:56:05,877 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:56:05,877 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [330843443] [2020-10-13 10:56:05,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:56:05,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:56:05,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:05,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:06,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:06,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:06,933 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:56:06,933 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-13 10:56:06,933 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 10:56:06,934 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1042 [2020-10-13 10:56:06,934 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:56:06,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 10:56:06,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:56:06,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-13 10:56:06,934 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:56:07,189 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:56:07,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:56:07,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:07,192 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:56:07,192 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:56:07,192 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:56:07,193 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:56:07,193 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:56:07,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:56:07,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:56:07,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:56:07,194 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:56:07,203 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-13 10:56:07,204 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [330843443] [2020-10-13 10:56:07,204 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:56:07,204 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-13 10:56:07,205 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874991606] [2020-10-13 10:56:07,205 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-13 10:56:07,205 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:56:07,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-13 10:56:07,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-10-13 10:56:07,206 INFO L87 Difference]: Start difference. First operand 101 states and 125 transitions. Second operand 13 states. [2020-10-13 10:56:07,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:56:07,799 INFO L93 Difference]: Finished difference Result 114 states and 137 transitions. [2020-10-13 10:56:07,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-13 10:56:07,800 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 26 [2020-10-13 10:56:07,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:56:07,801 INFO L225 Difference]: With dead ends: 114 [2020-10-13 10:56:07,801 INFO L226 Difference]: Without dead ends: 96 [2020-10-13 10:56:07,802 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2020-10-13 10:56:07,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-13 10:56:07,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2020-10-13 10:56:07,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-13 10:56:07,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 119 transitions. [2020-10-13 10:56:07,828 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 119 transitions. Word has length 26 [2020-10-13 10:56:07,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:56:07,828 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 119 transitions. [2020-10-13 10:56:07,828 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-13 10:56:07,828 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 119 transitions. [2020-10-13 10:56:07,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-13 10:56:07,830 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:56:07,830 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:56:07,832 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-13 10:56:07,833 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:56:07,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:56:07,833 INFO L82 PathProgramCache]: Analyzing trace with hash -1522376698, now seen corresponding path program 11 times [2020-10-13 10:56:07,833 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:56:07,834 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1043230155] [2020-10-13 10:56:07,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:56:07,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:56:07,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:07,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:08,301 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:56:08,301 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-13 10:56:08,302 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:56:08,302 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 450 [2020-10-13 10:56:08,302 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:56:08,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 10:56:08,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-13 10:56:08,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 10:56:08,303 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:56:08,388 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:56:08,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:56:08,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:08,390 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:56:08,390 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:56:08,390 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:56:08,391 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:56:08,391 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:56:08,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:56:08,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:56:08,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:56:08,392 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:56:08,394 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-10-13 10:56:08,394 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1043230155] [2020-10-13 10:56:08,394 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:56:08,394 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 10:56:08,395 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826367955] [2020-10-13 10:56:08,395 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 10:56:08,395 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:56:08,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 10:56:08,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-13 10:56:08,396 INFO L87 Difference]: Start difference. First operand 96 states and 119 transitions. Second operand 8 states. [2020-10-13 10:56:08,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:56:08,506 INFO L93 Difference]: Finished difference Result 124 states and 158 transitions. [2020-10-13 10:56:08,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-13 10:56:08,507 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 27 [2020-10-13 10:56:08,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:56:08,508 INFO L225 Difference]: With dead ends: 124 [2020-10-13 10:56:08,508 INFO L226 Difference]: Without dead ends: 118 [2020-10-13 10:56:08,508 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-13 10:56:08,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-13 10:56:08,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 114. [2020-10-13 10:56:08,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-10-13 10:56:08,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 143 transitions. [2020-10-13 10:56:08,523 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 143 transitions. Word has length 27 [2020-10-13 10:56:08,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:56:08,523 INFO L479 AbstractCegarLoop]: Abstraction has 114 states and 143 transitions. [2020-10-13 10:56:08,523 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 10:56:08,523 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 143 transitions. [2020-10-13 10:56:08,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-13 10:56:08,524 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:56:08,524 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:56:08,524 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-13 10:56:08,524 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:56:08,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:56:08,525 INFO L82 PathProgramCache]: Analyzing trace with hash 2079985356, now seen corresponding path program 12 times [2020-10-13 10:56:08,525 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:56:08,525 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1476904917] [2020-10-13 10:56:08,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:56:08,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:56:08,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:08,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:09,617 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:56:09,618 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-13 10:56:09,618 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:56:09,618 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1082 [2020-10-13 10:56:09,618 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:56:09,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 10:56:09,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-13 10:56:09,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-13 10:56:09,619 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:56:09,725 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:56:09,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:56:09,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:09,727 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:56:09,728 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:56:09,728 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:56:09,728 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:56:09,728 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:56:09,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:56:09,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:56:09,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:56:09,729 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:56:09,731 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-13 10:56:09,731 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1476904917] [2020-10-13 10:56:09,731 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:56:09,732 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 10:56:09,732 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292127071] [2020-10-13 10:56:09,732 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 10:56:09,733 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:56:09,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 10:56:09,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-13 10:56:09,733 INFO L87 Difference]: Start difference. First operand 114 states and 143 transitions. Second operand 10 states. [2020-10-13 10:56:09,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:56:09,975 INFO L93 Difference]: Finished difference Result 148 states and 181 transitions. [2020-10-13 10:56:09,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-13 10:56:09,976 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 28 [2020-10-13 10:56:09,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:56:09,978 INFO L225 Difference]: With dead ends: 148 [2020-10-13 10:56:09,978 INFO L226 Difference]: Without dead ends: 118 [2020-10-13 10:56:09,978 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2020-10-13 10:56:09,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-13 10:56:09,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 106. [2020-10-13 10:56:09,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-10-13 10:56:09,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 130 transitions. [2020-10-13 10:56:09,998 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 130 transitions. Word has length 28 [2020-10-13 10:56:09,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:56:09,998 INFO L479 AbstractCegarLoop]: Abstraction has 106 states and 130 transitions. [2020-10-13 10:56:09,999 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 10:56:09,999 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 130 transitions. [2020-10-13 10:56:09,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-13 10:56:10,000 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:56:10,000 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:56:10,000 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-13 10:56:10,000 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:56:10,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:56:10,002 INFO L82 PathProgramCache]: Analyzing trace with hash -1640373556, now seen corresponding path program 13 times [2020-10-13 10:56:10,002 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:56:10,003 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1171065316] [2020-10-13 10:56:10,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:56:10,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:56:10,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:10,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:10,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:10,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:12,980 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:56:12,981 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-13 10:56:12,981 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 10:56:12,981 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2964 [2020-10-13 10:56:12,981 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:56:12,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 10:56:12,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:56:12,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-13 10:56:12,982 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:56:13,135 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:56:13,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:56:13,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:13,138 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:56:13,138 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:56:13,138 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:56:13,138 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:56:13,138 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:56:13,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:56:13,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:56:13,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:56:13,139 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:56:13,141 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-13 10:56:13,141 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1171065316] [2020-10-13 10:56:13,141 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:56:13,142 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 10:56:13,142 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455135928] [2020-10-13 10:56:13,142 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 10:56:13,142 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:56:13,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 10:56:13,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-10-13 10:56:13,143 INFO L87 Difference]: Start difference. First operand 106 states and 130 transitions. Second operand 12 states. [2020-10-13 10:56:13,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:56:13,498 INFO L93 Difference]: Finished difference Result 134 states and 158 transitions. [2020-10-13 10:56:13,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-13 10:56:13,498 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 28 [2020-10-13 10:56:13,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:56:13,499 INFO L225 Difference]: With dead ends: 134 [2020-10-13 10:56:13,499 INFO L226 Difference]: Without dead ends: 115 [2020-10-13 10:56:13,500 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=69, Invalid=483, Unknown=0, NotChecked=0, Total=552 [2020-10-13 10:56:13,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-13 10:56:13,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 104. [2020-10-13 10:56:13,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-13 10:56:13,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 125 transitions. [2020-10-13 10:56:13,518 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 125 transitions. Word has length 28 [2020-10-13 10:56:13,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:56:13,518 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 125 transitions. [2020-10-13 10:56:13,518 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 10:56:13,518 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 125 transitions. [2020-10-13 10:56:13,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-13 10:56:13,519 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:56:13,519 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:56:13,519 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-13 10:56:13,519 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:56:13,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:56:13,520 INFO L82 PathProgramCache]: Analyzing trace with hash -1635256468, now seen corresponding path program 14 times [2020-10-13 10:56:13,520 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:56:13,520 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [362523666] [2020-10-13 10:56:13,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:56:13,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:56:13,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:13,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:13,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:14,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:14,583 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:56:14,584 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-13 10:56:14,584 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 10:56:14,584 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1046 [2020-10-13 10:56:14,584 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:56:14,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 10:56:14,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:56:14,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-13 10:56:14,584 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:56:14,925 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:56:14,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:56:14,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:14,927 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:56:14,927 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:56:14,928 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:56:14,928 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:56:14,928 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:56:14,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:56:14,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:56:14,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:56:14,929 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:56:14,933 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-10-13 10:56:14,933 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [362523666] [2020-10-13 10:56:14,933 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:56:14,933 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-13 10:56:14,934 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708114442] [2020-10-13 10:56:14,934 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-13 10:56:14,934 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:56:14,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-13 10:56:14,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2020-10-13 10:56:14,935 INFO L87 Difference]: Start difference. First operand 104 states and 125 transitions. Second operand 15 states. [2020-10-13 10:56:15,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:56:15,533 INFO L93 Difference]: Finished difference Result 119 states and 139 transitions. [2020-10-13 10:56:15,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-13 10:56:15,534 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 30 [2020-10-13 10:56:15,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:56:15,535 INFO L225 Difference]: With dead ends: 119 [2020-10-13 10:56:15,536 INFO L226 Difference]: Without dead ends: 98 [2020-10-13 10:56:15,537 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=81, Invalid=569, Unknown=0, NotChecked=0, Total=650 [2020-10-13 10:56:15,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-13 10:56:15,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2020-10-13 10:56:15,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-13 10:56:15,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 118 transitions. [2020-10-13 10:56:15,549 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 118 transitions. Word has length 30 [2020-10-13 10:56:15,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:56:15,550 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 118 transitions. [2020-10-13 10:56:15,550 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-13 10:56:15,550 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 118 transitions. [2020-10-13 10:56:15,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-13 10:56:15,551 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:56:15,551 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:56:15,551 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-13 10:56:15,551 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:56:15,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:56:15,551 INFO L82 PathProgramCache]: Analyzing trace with hash 1421701084, now seen corresponding path program 15 times [2020-10-13 10:56:15,552 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:56:15,552 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [419542772] [2020-10-13 10:56:15,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:56:15,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:56:15,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:15,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:15,853 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:56:15,853 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-13 10:56:15,853 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:56:15,854 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 288 [2020-10-13 10:56:15,854 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:56:15,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 10:56:15,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-13 10:56:15,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 10:56:15,854 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:56:15,948 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:56:15,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:56:15,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:15,950 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:56:15,950 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:56:15,950 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:56:15,950 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:56:15,950 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:56:15,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:56:15,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:56:15,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:56:15,951 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:56:15,953 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-10-13 10:56:15,953 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [419542772] [2020-10-13 10:56:15,954 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:56:15,954 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 10:56:15,954 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126378254] [2020-10-13 10:56:15,954 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 10:56:15,954 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:56:15,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 10:56:15,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-13 10:56:15,955 INFO L87 Difference]: Start difference. First operand 98 states and 118 transitions. Second operand 9 states. [2020-10-13 10:56:16,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:56:16,100 INFO L93 Difference]: Finished difference Result 126 states and 157 transitions. [2020-10-13 10:56:16,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 10:56:16,101 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 30 [2020-10-13 10:56:16,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:56:16,102 INFO L225 Difference]: With dead ends: 126 [2020-10-13 10:56:16,102 INFO L226 Difference]: Without dead ends: 120 [2020-10-13 10:56:16,103 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-13 10:56:16,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-13 10:56:16,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 115. [2020-10-13 10:56:16,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-10-13 10:56:16,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 140 transitions. [2020-10-13 10:56:16,116 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 140 transitions. Word has length 30 [2020-10-13 10:56:16,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:56:16,116 INFO L479 AbstractCegarLoop]: Abstraction has 115 states and 140 transitions. [2020-10-13 10:56:16,116 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 10:56:16,116 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 140 transitions. [2020-10-13 10:56:16,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-13 10:56:16,117 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:56:16,117 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:56:16,117 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-13 10:56:16,117 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:56:16,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:56:16,117 INFO L82 PathProgramCache]: Analyzing trace with hash 204760376, now seen corresponding path program 16 times [2020-10-13 10:56:16,118 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:56:16,118 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1677660000] [2020-10-13 10:56:16,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:56:16,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:56:16,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:16,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:16,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:16,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:19,743 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:56:19,743 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-13 10:56:19,743 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 10:56:19,743 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3616 [2020-10-13 10:56:19,744 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:56:19,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-13 10:56:19,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-13 10:56:19,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 10:56:19,744 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:56:24,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:56:24,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:56:24,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:24,598 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:56:24,598 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:56:24,598 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:56:24,599 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:56:24,599 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:56:24,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:56:24,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:56:24,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:56:24,599 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:56:24,603 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 3 proven. 32 refuted. 1 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-13 10:56:24,603 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1677660000] [2020-10-13 10:56:24,604 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:56:24,604 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 10:56:24,604 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530164245] [2020-10-13 10:56:24,604 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 10:56:24,605 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:56:24,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 10:56:24,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=144, Unknown=1, NotChecked=0, Total=182 [2020-10-13 10:56:24,606 INFO L87 Difference]: Start difference. First operand 115 states and 140 transitions. Second operand 14 states. [2020-10-13 10:56:38,655 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2020-10-13 10:56:48,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:56:48,254 INFO L93 Difference]: Finished difference Result 164 states and 197 transitions. [2020-10-13 10:56:48,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 10:56:48,254 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 31 [2020-10-13 10:56:48,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:56:48,256 INFO L225 Difference]: With dead ends: 164 [2020-10-13 10:56:48,256 INFO L226 Difference]: Without dead ends: 143 [2020-10-13 10:56:48,256 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=44, Invalid=165, Unknown=1, NotChecked=0, Total=210 [2020-10-13 10:56:48,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-10-13 10:56:48,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 119. [2020-10-13 10:56:48,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-10-13 10:56:48,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 141 transitions. [2020-10-13 10:56:48,271 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 141 transitions. Word has length 31 [2020-10-13 10:56:48,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:56:48,271 INFO L479 AbstractCegarLoop]: Abstraction has 119 states and 141 transitions. [2020-10-13 10:56:48,271 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 10:56:48,271 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 141 transitions. [2020-10-13 10:56:48,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-13 10:56:48,272 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:56:48,272 INFO L422 BasicCegarLoop]: trace histogram [8, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:56:48,272 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-13 10:56:48,273 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:56:48,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:56:48,273 INFO L82 PathProgramCache]: Analyzing trace with hash -1199045641, now seen corresponding path program 17 times [2020-10-13 10:56:48,273 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:56:48,273 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1335460885] [2020-10-13 10:56:48,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:56:48,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:56:48,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:48,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:49,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:50,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:51,136 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:56:51,137 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-13 10:56:51,137 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 10:56:51,137 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2852 [2020-10-13 10:56:51,137 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:56:51,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 10:56:51,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:56:51,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-13 10:56:51,138 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:56:51,365 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:56:51,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:56:51,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:51,368 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:56:51,368 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:56:51,368 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:56:51,368 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:56:51,369 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:56:51,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:56:51,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:56:51,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:56:51,369 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:56:51,371 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-13 10:56:51,371 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1335460885] [2020-10-13 10:56:51,372 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:56:51,372 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-13 10:56:51,372 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702783043] [2020-10-13 10:56:51,372 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-13 10:56:51,372 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:56:51,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-13 10:56:51,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2020-10-13 10:56:51,373 INFO L87 Difference]: Start difference. First operand 119 states and 141 transitions. Second operand 15 states. [2020-10-13 10:56:52,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:56:52,039 INFO L93 Difference]: Finished difference Result 216 states and 275 transitions. [2020-10-13 10:56:52,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-13 10:56:52,048 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 31 [2020-10-13 10:56:52,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:56:52,049 INFO L225 Difference]: With dead ends: 216 [2020-10-13 10:56:52,049 INFO L226 Difference]: Without dead ends: 195 [2020-10-13 10:56:52,050 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2020-10-13 10:56:52,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2020-10-13 10:56:52,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 133. [2020-10-13 10:56:52,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-10-13 10:56:52,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 160 transitions. [2020-10-13 10:56:52,090 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 160 transitions. Word has length 31 [2020-10-13 10:56:52,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:56:52,090 INFO L479 AbstractCegarLoop]: Abstraction has 133 states and 160 transitions. [2020-10-13 10:56:52,090 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-13 10:56:52,090 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 160 transitions. [2020-10-13 10:56:52,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-13 10:56:52,091 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:56:52,092 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:56:52,092 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-13 10:56:52,092 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:56:52,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:56:52,092 INFO L82 PathProgramCache]: Analyzing trace with hash -892288646, now seen corresponding path program 18 times [2020-10-13 10:56:52,093 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:56:52,093 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1348212383] [2020-10-13 10:56:52,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:56:52,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:56:52,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:52,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:53,241 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:56:53,242 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-13 10:56:53,242 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:56:53,242 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1130 [2020-10-13 10:56:53,242 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:56:53,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 10:56:53,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-13 10:56:53,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-13 10:56:53,242 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:56:53,408 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:56:53,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:56:53,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:53,411 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:56:53,412 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:56:53,412 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:56:53,412 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:56:53,413 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:56:53,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:56:53,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:56:53,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:56:53,414 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:56:53,416 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-13 10:56:53,417 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1348212383] [2020-10-13 10:56:53,417 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:56:53,417 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 10:56:53,417 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797235517] [2020-10-13 10:56:53,417 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 10:56:53,418 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:56:53,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 10:56:53,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-10-13 10:56:53,418 INFO L87 Difference]: Start difference. First operand 133 states and 160 transitions. Second operand 12 states. [2020-10-13 10:56:53,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:56:53,859 INFO L93 Difference]: Finished difference Result 179 states and 212 transitions. [2020-10-13 10:56:53,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-13 10:56:53,861 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 32 [2020-10-13 10:56:53,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:56:53,862 INFO L225 Difference]: With dead ends: 179 [2020-10-13 10:56:53,862 INFO L226 Difference]: Without dead ends: 144 [2020-10-13 10:56:53,862 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2020-10-13 10:56:53,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-10-13 10:56:53,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 125. [2020-10-13 10:56:53,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-10-13 10:56:53,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 147 transitions. [2020-10-13 10:56:53,878 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 147 transitions. Word has length 32 [2020-10-13 10:56:53,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:56:53,878 INFO L479 AbstractCegarLoop]: Abstraction has 125 states and 147 transitions. [2020-10-13 10:56:53,878 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 10:56:53,878 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 147 transitions. [2020-10-13 10:56:53,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-13 10:56:53,879 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:56:53,879 INFO L422 BasicCegarLoop]: trace histogram [9, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:56:53,879 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-13 10:56:53,879 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:56:53,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:56:53,880 INFO L82 PathProgramCache]: Analyzing trace with hash -1934301956, now seen corresponding path program 19 times [2020-10-13 10:56:53,880 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:56:53,880 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [546735510] [2020-10-13 10:56:53,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:56:53,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:56:53,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:53,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:54,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:54,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:55,795 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:56:55,795 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-13 10:56:55,795 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 10:56:55,796 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1905 [2020-10-13 10:56:55,796 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:56:55,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-13 10:56:55,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:56:55,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 10:56:55,796 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:56:56,041 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:56:56,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:56:56,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:56,043 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:56:56,044 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:56:56,044 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:56:56,044 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:56:56,045 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:56:56,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:56:56,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:56:56,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:56:56,045 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:56:56,047 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-13 10:56:56,048 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [546735510] [2020-10-13 10:56:56,048 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:56:56,048 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 10:56:56,048 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575270537] [2020-10-13 10:56:56,048 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 10:56:56,048 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:56:56,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 10:56:56,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2020-10-13 10:56:56,049 INFO L87 Difference]: Start difference. First operand 125 states and 147 transitions. Second operand 16 states. [2020-10-13 10:56:56,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:56:56,835 INFO L93 Difference]: Finished difference Result 217 states and 273 transitions. [2020-10-13 10:56:56,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-13 10:56:56,836 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 32 [2020-10-13 10:56:56,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:56:56,837 INFO L225 Difference]: With dead ends: 217 [2020-10-13 10:56:56,838 INFO L226 Difference]: Without dead ends: 192 [2020-10-13 10:56:56,839 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=84, Invalid=566, Unknown=0, NotChecked=0, Total=650 [2020-10-13 10:56:56,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-10-13 10:56:56,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 138. [2020-10-13 10:56:56,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-10-13 10:56:56,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 164 transitions. [2020-10-13 10:56:56,857 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 164 transitions. Word has length 32 [2020-10-13 10:56:56,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:56:56,857 INFO L479 AbstractCegarLoop]: Abstraction has 138 states and 164 transitions. [2020-10-13 10:56:56,857 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 10:56:56,858 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 164 transitions. [2020-10-13 10:56:56,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-13 10:56:56,858 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:56:56,858 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:56:56,859 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-13 10:56:56,859 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:56:56,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:56:56,859 INFO L82 PathProgramCache]: Analyzing trace with hash 1308040262, now seen corresponding path program 20 times [2020-10-13 10:56:56,859 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:56:56,860 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1753414784] [2020-10-13 10:56:56,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:56:56,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:56:56,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:56,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:57,344 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:56:57,344 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-13 10:56:57,344 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:56:57,344 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 469 [2020-10-13 10:56:57,344 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:56:57,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 10:56:57,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-13 10:56:57,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-13 10:56:57,345 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:56:57,484 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:56:57,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:56:57,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:57,485 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:56:57,485 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:56:57,486 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:56:57,486 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:56:57,486 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:56:57,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:56:57,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:56:57,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:56:57,487 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:56:57,490 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2020-10-13 10:56:57,491 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1753414784] [2020-10-13 10:56:57,491 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:56:57,491 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 10:56:57,491 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287326096] [2020-10-13 10:56:57,491 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 10:56:57,492 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:56:57,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 10:56:57,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-13 10:56:57,492 INFO L87 Difference]: Start difference. First operand 138 states and 164 transitions. Second operand 10 states. [2020-10-13 10:56:59,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:56:59,766 INFO L93 Difference]: Finished difference Result 173 states and 212 transitions. [2020-10-13 10:56:59,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 10:56:59,769 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 33 [2020-10-13 10:56:59,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:56:59,770 INFO L225 Difference]: With dead ends: 173 [2020-10-13 10:56:59,770 INFO L226 Difference]: Without dead ends: 167 [2020-10-13 10:56:59,771 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-13 10:56:59,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-10-13 10:56:59,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 161. [2020-10-13 10:56:59,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-10-13 10:56:59,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 193 transitions. [2020-10-13 10:56:59,786 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 193 transitions. Word has length 33 [2020-10-13 10:56:59,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:56:59,786 INFO L479 AbstractCegarLoop]: Abstraction has 161 states and 193 transitions. [2020-10-13 10:56:59,787 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 10:56:59,787 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 193 transitions. [2020-10-13 10:56:59,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-13 10:56:59,787 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:56:59,788 INFO L422 BasicCegarLoop]: trace histogram [10, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:56:59,788 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-13 10:56:59,788 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:56:59,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:56:59,788 INFO L82 PathProgramCache]: Analyzing trace with hash 1042556055, now seen corresponding path program 21 times [2020-10-13 10:56:59,788 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:56:59,789 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [94215504] [2020-10-13 10:56:59,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:56:59,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:56:59,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:59,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:00,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:01,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:02,124 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:57:02,124 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-13 10:57:02,124 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 10:57:02,124 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2327 [2020-10-13 10:57:02,124 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:57:02,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 10:57:02,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:57:02,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-13 10:57:02,125 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:57:02,387 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:57:02,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:57:02,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:02,388 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:57:02,388 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:57:02,388 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:57:02,388 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:57:02,388 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:57:02,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:57:02,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:57:02,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:57:02,389 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:57:02,391 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-13 10:57:02,391 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [94215504] [2020-10-13 10:57:02,391 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:57:02,391 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-13 10:57:02,391 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251672869] [2020-10-13 10:57:02,392 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-13 10:57:02,392 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:57:02,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-13 10:57:02,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=238, Unknown=0, NotChecked=0, Total=272 [2020-10-13 10:57:02,393 INFO L87 Difference]: Start difference. First operand 161 states and 193 transitions. Second operand 17 states. [2020-10-13 10:57:03,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:57:03,240 INFO L93 Difference]: Finished difference Result 279 states and 356 transitions. [2020-10-13 10:57:03,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-13 10:57:03,240 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 33 [2020-10-13 10:57:03,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:57:03,242 INFO L225 Difference]: With dead ends: 279 [2020-10-13 10:57:03,242 INFO L226 Difference]: Without dead ends: 252 [2020-10-13 10:57:03,243 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=86, Invalid=616, Unknown=0, NotChecked=0, Total=702 [2020-10-13 10:57:03,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2020-10-13 10:57:03,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 176. [2020-10-13 10:57:03,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2020-10-13 10:57:03,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 213 transitions. [2020-10-13 10:57:03,271 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 213 transitions. Word has length 33 [2020-10-13 10:57:03,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:57:03,273 INFO L479 AbstractCegarLoop]: Abstraction has 176 states and 213 transitions. [2020-10-13 10:57:03,273 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-13 10:57:03,273 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 213 transitions. [2020-10-13 10:57:03,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-13 10:57:03,274 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:57:03,274 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:57:03,274 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-13 10:57:03,275 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:57:03,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:57:03,275 INFO L82 PathProgramCache]: Analyzing trace with hash -1917292964, now seen corresponding path program 22 times [2020-10-13 10:57:03,275 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:57:03,275 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1307733953] [2020-10-13 10:57:03,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:57:03,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:57:03,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:03,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:03,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:04,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:04,520 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:57:04,520 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-13 10:57:04,520 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 10:57:04,520 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1221 [2020-10-13 10:57:04,520 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:57:04,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 10:57:04,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:57:04,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-13 10:57:04,521 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:57:04,882 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:57:04,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:57:04,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:04,884 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:57:04,884 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:57:04,884 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:57:04,885 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:57:04,885 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:57:04,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:57:04,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:57:04,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:57:04,885 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:57:04,889 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-10-13 10:57:04,890 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1307733953] [2020-10-13 10:57:04,890 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:57:04,890 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-13 10:57:04,890 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787037343] [2020-10-13 10:57:04,891 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-13 10:57:04,891 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:57:04,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-13 10:57:04,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2020-10-13 10:57:04,892 INFO L87 Difference]: Start difference. First operand 176 states and 213 transitions. Second operand 17 states. [2020-10-13 10:57:05,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:57:05,702 INFO L93 Difference]: Finished difference Result 193 states and 229 transitions. [2020-10-13 10:57:05,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-13 10:57:05,702 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 34 [2020-10-13 10:57:05,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:57:05,703 INFO L225 Difference]: With dead ends: 193 [2020-10-13 10:57:05,703 INFO L226 Difference]: Without dead ends: 169 [2020-10-13 10:57:05,706 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=95, Invalid=775, Unknown=0, NotChecked=0, Total=870 [2020-10-13 10:57:05,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2020-10-13 10:57:05,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 169. [2020-10-13 10:57:05,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-10-13 10:57:05,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 205 transitions. [2020-10-13 10:57:05,732 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 205 transitions. Word has length 34 [2020-10-13 10:57:05,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:57:05,732 INFO L479 AbstractCegarLoop]: Abstraction has 169 states and 205 transitions. [2020-10-13 10:57:05,733 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-13 10:57:05,733 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 205 transitions. [2020-10-13 10:57:05,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-13 10:57:05,733 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:57:05,734 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:57:05,734 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-13 10:57:05,734 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:57:05,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:57:05,734 INFO L82 PathProgramCache]: Analyzing trace with hash -829448500, now seen corresponding path program 23 times [2020-10-13 10:57:05,734 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:57:05,735 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [316356122] [2020-10-13 10:57:05,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:57:05,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:57:05,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:05,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:05,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:06,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:10,623 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:57:10,623 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-13 10:57:10,623 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 10:57:10,623 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4880 [2020-10-13 10:57:10,624 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:57:10,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-13 10:57:10,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-13 10:57:10,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 10:57:10,624 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:57:10,927 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:57:10,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:57:10,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:10,929 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:57:10,929 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:57:10,930 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:57:10,930 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:57:10,930 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:57:10,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:57:10,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:57:10,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:57:10,931 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:57:10,933 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-10-13 10:57:10,933 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [316356122] [2020-10-13 10:57:10,934 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:57:10,934 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 10:57:10,934 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221422058] [2020-10-13 10:57:10,934 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 10:57:10,935 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:57:10,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 10:57:10,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2020-10-13 10:57:10,935 INFO L87 Difference]: Start difference. First operand 169 states and 205 transitions. Second operand 16 states. [2020-10-13 10:57:12,484 WARN L193 SmtUtils]: Spent 286.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-10-13 10:57:23,288 WARN L193 SmtUtils]: Spent 466.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2020-10-13 10:57:27,984 WARN L193 SmtUtils]: Spent 2.09 s on a formula simplification that was a NOOP. DAG size: 35 [2020-10-13 10:57:30,501 WARN L193 SmtUtils]: Spent 2.21 s on a formula simplification that was a NOOP. DAG size: 47 [2020-10-13 10:57:36,019 WARN L193 SmtUtils]: Spent 283.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2020-10-13 10:57:37,283 WARN L193 SmtUtils]: Spent 486.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2020-10-13 10:57:38,310 WARN L193 SmtUtils]: Spent 713.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2020-10-13 10:57:45,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:57:45,845 INFO L93 Difference]: Finished difference Result 323 states and 371 transitions. [2020-10-13 10:57:45,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-13 10:57:45,850 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 34 [2020-10-13 10:57:45,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:57:45,853 INFO L225 Difference]: With dead ends: 323 [2020-10-13 10:57:45,853 INFO L226 Difference]: Without dead ends: 287 [2020-10-13 10:57:45,855 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 522 ImplicationChecksByTransitivity, 19.8s TimeCoverageRelationStatistics Valid=379, Invalid=1970, Unknown=3, NotChecked=0, Total=2352 [2020-10-13 10:57:45,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2020-10-13 10:57:45,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 173. [2020-10-13 10:57:45,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2020-10-13 10:57:45,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 206 transitions. [2020-10-13 10:57:45,878 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 206 transitions. Word has length 34 [2020-10-13 10:57:45,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:57:45,879 INFO L479 AbstractCegarLoop]: Abstraction has 173 states and 206 transitions. [2020-10-13 10:57:45,879 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 10:57:45,879 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 206 transitions. [2020-10-13 10:57:45,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-13 10:57:45,880 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:57:45,880 INFO L422 BasicCegarLoop]: trace histogram [11, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:57:45,880 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-13 10:57:45,881 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:57:45,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:57:45,881 INFO L82 PathProgramCache]: Analyzing trace with hash -1164126116, now seen corresponding path program 24 times [2020-10-13 10:57:45,881 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:57:45,881 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [198160948] [2020-10-13 10:57:45,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:57:45,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:57:45,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:45,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:46,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:47,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:49,407 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:57:49,407 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-13 10:57:49,408 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 10:57:49,408 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3516 [2020-10-13 10:57:49,408 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:57:49,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-13 10:57:49,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:57:49,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-13 10:57:49,408 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:57:49,739 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:57:49,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:57:49,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:49,741 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:57:49,741 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:57:49,741 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:57:49,741 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:57:49,742 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:57:49,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:57:49,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:57:49,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:57:49,742 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:57:49,744 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-13 10:57:49,744 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [198160948] [2020-10-13 10:57:49,744 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:57:49,744 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-13 10:57:49,744 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462288563] [2020-10-13 10:57:49,745 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-13 10:57:49,745 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:57:49,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-13 10:57:49,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=270, Unknown=0, NotChecked=0, Total=306 [2020-10-13 10:57:49,746 INFO L87 Difference]: Start difference. First operand 173 states and 206 transitions. Second operand 18 states. [2020-10-13 10:57:50,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:57:50,650 INFO L93 Difference]: Finished difference Result 297 states and 375 transitions. [2020-10-13 10:57:50,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-13 10:57:50,651 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 34 [2020-10-13 10:57:50,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:57:50,653 INFO L225 Difference]: With dead ends: 297 [2020-10-13 10:57:50,653 INFO L226 Difference]: Without dead ends: 270 [2020-10-13 10:57:50,654 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=88, Invalid=668, Unknown=0, NotChecked=0, Total=756 [2020-10-13 10:57:50,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2020-10-13 10:57:50,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 188. [2020-10-13 10:57:50,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2020-10-13 10:57:50,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 226 transitions. [2020-10-13 10:57:50,673 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 226 transitions. Word has length 34 [2020-10-13 10:57:50,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:57:50,673 INFO L479 AbstractCegarLoop]: Abstraction has 188 states and 226 transitions. [2020-10-13 10:57:50,673 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-13 10:57:50,673 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 226 transitions. [2020-10-13 10:57:50,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-13 10:57:50,673 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:57:50,674 INFO L422 BasicCegarLoop]: trace histogram [12, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:57:50,674 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-13 10:57:50,674 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:57:50,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:57:50,674 INFO L82 PathProgramCache]: Analyzing trace with hash -851796681, now seen corresponding path program 25 times [2020-10-13 10:57:50,674 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:57:50,674 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1649893670] [2020-10-13 10:57:50,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:57:50,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:57:50,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:50,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:51,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:51,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:53,851 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:57:53,851 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-13 10:57:53,851 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 10:57:53,851 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3170 [2020-10-13 10:57:53,851 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:57:53,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-13 10:57:53,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:57:53,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-13 10:57:53,852 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:57:54,183 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:57:54,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:57:54,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:54,185 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:57:54,185 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:57:54,185 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:57:54,185 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:57:54,186 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:57:54,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:57:54,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:57:54,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:57:54,186 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:57:54,188 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-13 10:57:54,188 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1649893670] [2020-10-13 10:57:54,188 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:57:54,188 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-13 10:57:54,188 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831369429] [2020-10-13 10:57:54,189 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-13 10:57:54,189 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:57:54,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-13 10:57:54,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=304, Unknown=0, NotChecked=0, Total=342 [2020-10-13 10:57:54,189 INFO L87 Difference]: Start difference. First operand 188 states and 226 transitions. Second operand 19 states. [2020-10-13 10:57:55,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:57:55,172 INFO L93 Difference]: Finished difference Result 318 states and 406 transitions. [2020-10-13 10:57:55,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-13 10:57:55,172 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 35 [2020-10-13 10:57:55,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:57:55,174 INFO L225 Difference]: With dead ends: 318 [2020-10-13 10:57:55,174 INFO L226 Difference]: Without dead ends: 291 [2020-10-13 10:57:55,175 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=90, Invalid=722, Unknown=0, NotChecked=0, Total=812 [2020-10-13 10:57:55,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2020-10-13 10:57:55,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 203. [2020-10-13 10:57:55,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2020-10-13 10:57:55,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 246 transitions. [2020-10-13 10:57:55,201 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 246 transitions. Word has length 35 [2020-10-13 10:57:55,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:57:55,201 INFO L479 AbstractCegarLoop]: Abstraction has 203 states and 246 transitions. [2020-10-13 10:57:55,201 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-13 10:57:55,201 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 246 transitions. [2020-10-13 10:57:55,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-13 10:57:55,202 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:57:55,202 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:57:55,202 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-13 10:57:55,202 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:57:55,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:57:55,203 INFO L82 PathProgramCache]: Analyzing trace with hash 1722723356, now seen corresponding path program 26 times [2020-10-13 10:57:55,203 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:57:55,203 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1724925048] [2020-10-13 10:57:55,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:57:55,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:57:55,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:55,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:55,595 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:57:55,595 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-13 10:57:55,596 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:57:55,596 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 374 [2020-10-13 10:57:55,596 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:57:55,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 10:57:55,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-13 10:57:55,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-13 10:57:55,596 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:57:55,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:57:55,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:57:55,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:55,869 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:57:55,869 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:57:55,869 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:57:55,870 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:57:55,870 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:57:55,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:57:55,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:57:55,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:57:55,871 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:57:55,876 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2020-10-13 10:57:55,877 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1724925048] [2020-10-13 10:57:55,877 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:57:55,877 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-13 10:57:55,878 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350256333] [2020-10-13 10:57:55,878 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 10:57:55,878 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:57:55,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 10:57:55,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-10-13 10:57:55,879 INFO L87 Difference]: Start difference. First operand 203 states and 246 transitions. Second operand 11 states. [2020-10-13 10:57:56,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:57:56,268 INFO L93 Difference]: Finished difference Result 245 states and 304 transitions. [2020-10-13 10:57:56,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 10:57:56,269 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 36 [2020-10-13 10:57:56,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:57:56,271 INFO L225 Difference]: With dead ends: 245 [2020-10-13 10:57:56,271 INFO L226 Difference]: Without dead ends: 239 [2020-10-13 10:57:56,272 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-10-13 10:57:56,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2020-10-13 10:57:56,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 232. [2020-10-13 10:57:56,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2020-10-13 10:57:56,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 283 transitions. [2020-10-13 10:57:56,317 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 283 transitions. Word has length 36 [2020-10-13 10:57:56,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:57:56,317 INFO L479 AbstractCegarLoop]: Abstraction has 232 states and 283 transitions. [2020-10-13 10:57:56,317 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 10:57:56,317 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 283 transitions. [2020-10-13 10:57:56,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-13 10:57:56,319 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:57:56,319 INFO L422 BasicCegarLoop]: trace histogram [13, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:57:56,319 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-13 10:57:56,319 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:57:56,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:57:56,320 INFO L82 PathProgramCache]: Analyzing trace with hash 240481212, now seen corresponding path program 27 times [2020-10-13 10:57:56,320 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:57:56,320 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [478424153] [2020-10-13 10:57:56,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:57:56,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:57:56,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:56,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:57,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:58,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:58:00,511 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:58:00,512 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-13 10:58:00,512 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 10:58:00,512 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4176 [2020-10-13 10:58:00,512 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:58:00,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-13 10:58:00,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:58:00,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-13 10:58:00,513 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:58:00,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:58:00,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:58:00,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:58:00,879 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:58:00,880 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:58:00,880 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:58:00,880 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:58:00,880 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:58:00,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:58:00,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:58:00,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:58:00,881 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:58:00,882 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 0 proven. 97 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-13 10:58:00,883 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [478424153] [2020-10-13 10:58:00,883 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:58:00,883 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-13 10:58:00,883 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806593098] [2020-10-13 10:58:00,883 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-13 10:58:00,883 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:58:00,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-13 10:58:00,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=340, Unknown=0, NotChecked=0, Total=380 [2020-10-13 10:58:00,884 INFO L87 Difference]: Start difference. First operand 232 states and 283 transitions. Second operand 20 states. [2020-10-13 10:58:01,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:58:01,986 INFO L93 Difference]: Finished difference Result 393 states and 508 transitions. [2020-10-13 10:58:01,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-13 10:58:01,986 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 36 [2020-10-13 10:58:01,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:58:01,988 INFO L225 Difference]: With dead ends: 393 [2020-10-13 10:58:01,989 INFO L226 Difference]: Without dead ends: 364 [2020-10-13 10:58:01,989 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=92, Invalid=778, Unknown=0, NotChecked=0, Total=870 [2020-10-13 10:58:01,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2020-10-13 10:58:02,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 249. [2020-10-13 10:58:02,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 249 states. [2020-10-13 10:58:02,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 306 transitions. [2020-10-13 10:58:02,015 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 306 transitions. Word has length 36 [2020-10-13 10:58:02,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:58:02,016 INFO L479 AbstractCegarLoop]: Abstraction has 249 states and 306 transitions. [2020-10-13 10:58:02,016 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-13 10:58:02,016 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 306 transitions. [2020-10-13 10:58:02,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-13 10:58:02,017 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:58:02,017 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:58:02,017 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-13 10:58:02,017 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:58:02,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:58:02,017 INFO L82 PathProgramCache]: Analyzing trace with hash -1001011016, now seen corresponding path program 28 times [2020-10-13 10:58:02,018 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:58:02,018 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [710604705] [2020-10-13 10:58:02,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:58:02,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:58:02,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:58:02,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:58:02,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:58:02,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:58:07,038 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:58:07,039 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-13 10:58:07,039 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 10:58:07,039 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-13 10:58:07,039 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:58:07,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-13 10:58:07,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-13 10:58:07,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-13 10:58:07,039 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:58:20,750 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:58:20,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:58:20,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:58:20,752 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:58:20,752 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:58:20,752 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:58:20,752 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:58:20,752 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:58:20,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:58:20,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:58:20,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:58:20,753 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:58:20,757 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 2 proven. 60 refuted. 2 times theorem prover too weak. 29 trivial. 0 not checked. [2020-10-13 10:58:20,757 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [710604705] [2020-10-13 10:58:20,757 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:58:20,757 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-13 10:58:20,757 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112762713] [2020-10-13 10:58:20,757 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-13 10:58:20,757 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:58:20,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-13 10:58:20,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=261, Unknown=6, NotChecked=0, Total=306 [2020-10-13 10:58:20,758 INFO L87 Difference]: Start difference. First operand 249 states and 306 transitions. Second operand 18 states. [2020-10-13 10:58:21,800 WARN L193 SmtUtils]: Spent 835.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 36 [2020-10-13 10:58:36,377 WARN L193 SmtUtils]: Spent 733.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 34 [2020-10-13 10:58:45,666 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 36 [2020-10-13 10:58:55,490 WARN L193 SmtUtils]: Spent 1.37 s on a formula simplification. DAG size of input: 65 DAG size of output: 58 [2020-10-13 10:59:03,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:59:03,524 INFO L93 Difference]: Finished difference Result 416 states and 479 transitions. [2020-10-13 10:59:03,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-13 10:59:03,528 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 37 [2020-10-13 10:59:03,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:59:03,530 INFO L225 Difference]: With dead ends: 416 [2020-10-13 10:59:03,530 INFO L226 Difference]: Without dead ends: 391 [2020-10-13 10:59:03,531 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 26.8s TimeCoverageRelationStatistics Valid=132, Invalid=853, Unknown=7, NotChecked=0, Total=992 [2020-10-13 10:59:03,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2020-10-13 10:59:03,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 249. [2020-10-13 10:59:03,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 249 states. [2020-10-13 10:59:03,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 303 transitions. [2020-10-13 10:59:03,566 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 303 transitions. Word has length 37 [2020-10-13 10:59:03,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:59:03,566 INFO L479 AbstractCegarLoop]: Abstraction has 249 states and 303 transitions. [2020-10-13 10:59:03,567 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-13 10:59:03,567 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 303 transitions. [2020-10-13 10:59:03,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-13 10:59:03,568 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:59:03,568 INFO L422 BasicCegarLoop]: trace histogram [14, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:59:03,568 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-13 10:59:03,568 INFO L427 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:59:03,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:59:03,568 INFO L82 PathProgramCache]: Analyzing trace with hash -258642473, now seen corresponding path program 29 times [2020-10-13 10:59:03,569 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:59:03,569 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2095270985] [2020-10-13 10:59:03,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:59:03,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:59:03,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:03,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:05,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:05,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:07,797 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:59:07,797 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-13 10:59:07,797 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 10:59:07,797 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4217 [2020-10-13 10:59:07,797 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:59:07,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-13 10:59:07,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:59:07,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-13 10:59:07,798 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:59:08,320 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:59:08,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:59:08,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:08,322 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:59:08,322 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:59:08,322 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:59:08,322 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:59:08,323 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:59:08,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:59:08,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:59:08,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:59:08,324 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:59:08,327 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-13 10:59:08,327 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2095270985] [2020-10-13 10:59:08,327 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:59:08,327 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-13 10:59:08,327 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067697682] [2020-10-13 10:59:08,328 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-13 10:59:08,328 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:59:08,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-13 10:59:08,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=378, Unknown=0, NotChecked=0, Total=420 [2020-10-13 10:59:08,329 INFO L87 Difference]: Start difference. First operand 249 states and 303 transitions. Second operand 21 states. [2020-10-13 10:59:09,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:59:09,676 INFO L93 Difference]: Finished difference Result 417 states and 539 transitions. [2020-10-13 10:59:09,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-13 10:59:09,677 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 37 [2020-10-13 10:59:09,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:59:09,679 INFO L225 Difference]: With dead ends: 417 [2020-10-13 10:59:09,679 INFO L226 Difference]: Without dead ends: 388 [2020-10-13 10:59:09,679 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=94, Invalid=836, Unknown=0, NotChecked=0, Total=930 [2020-10-13 10:59:09,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states. [2020-10-13 10:59:09,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 266. [2020-10-13 10:59:09,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 266 states. [2020-10-13 10:59:09,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 326 transitions. [2020-10-13 10:59:09,721 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 326 transitions. Word has length 37 [2020-10-13 10:59:09,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:59:09,722 INFO L479 AbstractCegarLoop]: Abstraction has 266 states and 326 transitions. [2020-10-13 10:59:09,722 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-13 10:59:09,722 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 326 transitions. [2020-10-13 10:59:09,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-13 10:59:09,723 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:59:09,723 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:59:09,723 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-13 10:59:09,723 INFO L427 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:59:09,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:59:09,724 INFO L82 PathProgramCache]: Analyzing trace with hash 1145513580, now seen corresponding path program 30 times [2020-10-13 10:59:09,724 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:59:09,724 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [455808625] [2020-10-13 10:59:09,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:59:09,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:59:09,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:10,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:10,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:10,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:10,912 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:59:10,913 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-13 10:59:10,913 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 10:59:10,913 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1160 [2020-10-13 10:59:10,913 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:59:10,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-13 10:59:10,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:59:10,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-13 10:59:10,913 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:59:16,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:59:16,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:59:16,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:16,665 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:59:16,665 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:59:16,666 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:59:16,666 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:59:16,666 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:59:16,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:59:16,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:59:16,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:59:16,666 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:59:16,671 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-10-13 10:59:16,671 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [455808625] [2020-10-13 10:59:16,671 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:59:16,671 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-13 10:59:16,671 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572063278] [2020-10-13 10:59:16,672 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-13 10:59:16,672 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:59:16,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-13 10:59:16,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=495, Unknown=2, NotChecked=0, Total=552 [2020-10-13 10:59:16,672 INFO L87 Difference]: Start difference. First operand 266 states and 326 transitions. Second operand 24 states. [2020-10-13 10:59:28,039 WARN L193 SmtUtils]: Spent 4.18 s on a formula simplification. DAG size of input: 34 DAG size of output: 27 [2020-10-13 10:59:41,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:59:41,532 INFO L93 Difference]: Finished difference Result 285 states and 344 transitions. [2020-10-13 10:59:41,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-13 10:59:41,533 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 38 [2020-10-13 10:59:41,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:59:41,534 INFO L225 Difference]: With dead ends: 285 [2020-10-13 10:59:41,535 INFO L226 Difference]: Without dead ends: 258 [2020-10-13 10:59:41,535 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 10.8s TimeCoverageRelationStatistics Valid=104, Invalid=950, Unknown=2, NotChecked=0, Total=1056 [2020-10-13 10:59:41,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2020-10-13 10:59:41,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 258. [2020-10-13 10:59:41,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 258 states. [2020-10-13 10:59:41,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 317 transitions. [2020-10-13 10:59:41,571 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 317 transitions. Word has length 38 [2020-10-13 10:59:41,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:59:41,571 INFO L479 AbstractCegarLoop]: Abstraction has 258 states and 317 transitions. [2020-10-13 10:59:41,571 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-13 10:59:41,571 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 317 transitions. [2020-10-13 10:59:41,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-13 10:59:41,572 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:59:41,572 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:59:41,573 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-13 10:59:41,573 INFO L427 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:59:41,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:59:41,573 INFO L82 PathProgramCache]: Analyzing trace with hash -2048600292, now seen corresponding path program 31 times [2020-10-13 10:59:41,573 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:59:41,574 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2111139757] [2020-10-13 10:59:41,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:59:41,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:59:41,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:41,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:44,216 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:59:44,216 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-13 10:59:44,216 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:59:44,216 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2632 [2020-10-13 10:59:44,216 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:59:44,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-13 10:59:44,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-13 10:59:44,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-13 10:59:44,217 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:59:44,615 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:59:44,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:59:44,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:44,617 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:59:44,617 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:59:44,617 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:59:44,618 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:59:44,618 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:59:44,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:59:44,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:59:44,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:59:44,618 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:59:44,621 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 22 proven. 20 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2020-10-13 10:59:44,621 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2111139757] [2020-10-13 10:59:44,622 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:59:44,622 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 10:59:44,622 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670144921] [2020-10-13 10:59:44,625 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 10:59:44,625 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:59:44,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 10:59:44,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2020-10-13 10:59:44,626 INFO L87 Difference]: Start difference. First operand 258 states and 317 transitions. Second operand 14 states. [2020-10-13 10:59:45,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:59:45,484 INFO L93 Difference]: Finished difference Result 340 states and 403 transitions. [2020-10-13 10:59:45,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-13 10:59:45,486 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 38 [2020-10-13 10:59:45,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:59:45,488 INFO L225 Difference]: With dead ends: 340 [2020-10-13 10:59:45,488 INFO L226 Difference]: Without dead ends: 270 [2020-10-13 10:59:45,489 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2020-10-13 10:59:45,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2020-10-13 10:59:45,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 241. [2020-10-13 10:59:45,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 241 states. [2020-10-13 10:59:45,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 290 transitions. [2020-10-13 10:59:45,554 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 290 transitions. Word has length 38 [2020-10-13 10:59:45,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:59:45,555 INFO L479 AbstractCegarLoop]: Abstraction has 241 states and 290 transitions. [2020-10-13 10:59:45,555 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 10:59:45,555 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 290 transitions. [2020-10-13 10:59:45,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-13 10:59:45,563 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:59:45,563 INFO L422 BasicCegarLoop]: trace histogram [15, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:59:45,564 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-13 10:59:45,564 INFO L427 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:59:45,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:59:45,564 INFO L82 PathProgramCache]: Analyzing trace with hash 1448392476, now seen corresponding path program 32 times [2020-10-13 10:59:45,565 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:59:45,565 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1552144726] [2020-10-13 10:59:45,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:59:45,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:59:45,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:45,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:47,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:47,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:49,731 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:59:49,732 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-13 10:59:49,732 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 10:59:49,732 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4154 [2020-10-13 10:59:49,732 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:59:49,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-13 10:59:49,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:59:49,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-13 10:59:49,733 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:59:50,203 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:59:50,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:59:50,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:50,205 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:59:50,205 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:59:50,206 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:59:50,206 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:59:50,206 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:59:50,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:59:50,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:59:50,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:59:50,207 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:59:50,208 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-13 10:59:50,209 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1552144726] [2020-10-13 10:59:50,209 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:59:50,209 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-13 10:59:50,209 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850887406] [2020-10-13 10:59:50,209 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-13 10:59:50,209 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:59:50,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-13 10:59:50,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=418, Unknown=0, NotChecked=0, Total=462 [2020-10-13 10:59:50,210 INFO L87 Difference]: Start difference. First operand 241 states and 290 transitions. Second operand 22 states. [2020-10-13 10:59:51,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:59:51,899 INFO L93 Difference]: Finished difference Result 399 states and 511 transitions. [2020-10-13 10:59:51,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-13 10:59:51,901 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 38 [2020-10-13 10:59:51,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:59:51,903 INFO L225 Difference]: With dead ends: 399 [2020-10-13 10:59:51,904 INFO L226 Difference]: Without dead ends: 365 [2020-10-13 10:59:51,905 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=96, Invalid=896, Unknown=0, NotChecked=0, Total=992 [2020-10-13 10:59:51,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2020-10-13 10:59:51,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 257. [2020-10-13 10:59:51,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 257 states. [2020-10-13 10:59:51,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 311 transitions. [2020-10-13 10:59:51,944 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 311 transitions. Word has length 38 [2020-10-13 10:59:51,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:59:51,944 INFO L479 AbstractCegarLoop]: Abstraction has 257 states and 311 transitions. [2020-10-13 10:59:51,944 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-13 10:59:51,944 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 311 transitions. [2020-10-13 10:59:51,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-13 10:59:51,945 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:59:51,945 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:59:51,945 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-13 10:59:51,946 INFO L427 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:59:51,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:59:51,946 INFO L82 PathProgramCache]: Analyzing trace with hash 985450630, now seen corresponding path program 33 times [2020-10-13 10:59:51,946 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:59:51,946 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [261252960] [2020-10-13 10:59:51,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:59:51,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:59:51,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:52,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:52,626 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:59:52,626 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-13 10:59:52,626 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:59:52,626 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 665 [2020-10-13 10:59:52,627 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:59:52,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 10:59:52,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-13 10:59:52,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-13 10:59:52,627 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:59:52,896 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:59:52,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:59:52,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:52,897 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:59:52,897 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:59:52,897 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:59:52,897 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:59:52,898 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:59:52,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:59:52,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:59:52,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:59:52,898 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:59:52,902 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2020-10-13 10:59:52,902 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [261252960] [2020-10-13 10:59:52,902 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:59:52,902 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 10:59:52,902 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885489934] [2020-10-13 10:59:52,903 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 10:59:52,903 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:59:52,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 10:59:52,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-10-13 10:59:52,903 INFO L87 Difference]: Start difference. First operand 257 states and 311 transitions. Second operand 12 states. [2020-10-13 10:59:53,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:59:53,235 INFO L93 Difference]: Finished difference Result 306 states and 379 transitions. [2020-10-13 10:59:53,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-13 10:59:53,235 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 39 [2020-10-13 10:59:53,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:59:53,237 INFO L225 Difference]: With dead ends: 306 [2020-10-13 10:59:53,237 INFO L226 Difference]: Without dead ends: 300 [2020-10-13 10:59:53,238 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-10-13 10:59:53,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2020-10-13 10:59:53,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 292. [2020-10-13 10:59:53,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 292 states. [2020-10-13 10:59:53,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 356 transitions. [2020-10-13 10:59:53,270 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 356 transitions. Word has length 39 [2020-10-13 10:59:53,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:59:53,270 INFO L479 AbstractCegarLoop]: Abstraction has 292 states and 356 transitions. [2020-10-13 10:59:53,270 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 10:59:53,270 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 356 transitions. [2020-10-13 10:59:53,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-13 10:59:53,271 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:59:53,271 INFO L422 BasicCegarLoop]: trace histogram [16, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:59:53,272 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-13 10:59:53,272 INFO L427 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:59:53,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:59:53,272 INFO L82 PathProgramCache]: Analyzing trace with hash -1468098953, now seen corresponding path program 34 times [2020-10-13 10:59:53,272 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:59:53,272 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [23029924] [2020-10-13 10:59:53,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:59:53,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:59:53,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:53,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking...