/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=NARROWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-examples/sorting_bubblesort_2_ground.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 04:41:57,909 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 04:41:57,911 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 04:41:57,934 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 04:41:57,934 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 04:41:57,935 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 04:41:57,937 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 04:41:57,938 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 04:41:57,940 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 04:41:57,941 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 04:41:57,942 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 04:41:57,943 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 04:41:57,943 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 04:41:57,944 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 04:41:57,945 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 04:41:57,946 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 04:41:57,947 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 04:41:57,948 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 04:41:57,950 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 04:41:57,952 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 04:41:57,953 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 04:41:57,954 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 04:41:57,955 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 04:41:57,956 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 04:41:57,961 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 04:41:57,961 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 04:41:57,962 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 04:41:57,963 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 04:41:57,965 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 04:41:57,966 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 04:41:57,967 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 04:41:57,967 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 04:41:57,968 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 04:41:57,969 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 04:41:57,970 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 04:41:57,970 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 04:41:57,971 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 04:41:57,971 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 04:41:57,971 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 04:41:57,972 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 04:41:57,973 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 04:41:57,974 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-13 04:41:57,995 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 04:41:57,996 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 04:41:57,997 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 04:41:57,997 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 04:41:57,997 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 04:41:57,998 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 04:41:57,998 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 04:41:57,998 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 04:41:57,998 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 04:41:57,998 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 04:41:57,998 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 04:41:57,999 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 04:41:57,999 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 04:41:57,999 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 04:41:57,999 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 04:41:57,999 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 04:41:58,000 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 04:41:58,000 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 04:41:58,000 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 04:41:58,000 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 04:41:58,000 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 04:41:58,001 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 04:41:58,001 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 04:41:58,001 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 04:41:58,001 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 04:41:58,001 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 04:41:58,002 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 04:41:58,002 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 04:41:58,002 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 04:41:58,002 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; [2020-10-13 04:41:58,284 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 04:41:58,300 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 04:41:58,306 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 04:41:58,308 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 04:41:58,309 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 04:41:58,310 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/sorting_bubblesort_2_ground.i [2020-10-13 04:41:58,384 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/26e3d62c2/946efd14067843178897ae379ae47101/FLAG9fefd38c4 [2020-10-13 04:41:58,868 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 04:41:58,869 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/sorting_bubblesort_2_ground.i [2020-10-13 04:41:58,876 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/26e3d62c2/946efd14067843178897ae379ae47101/FLAG9fefd38c4 [2020-10-13 04:41:59,254 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/26e3d62c2/946efd14067843178897ae379ae47101 [2020-10-13 04:41:59,262 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 04:41:59,263 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 04:41:59,264 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 04:41:59,264 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 04:41:59,269 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 04:41:59,270 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 04:41:59" (1/1) ... [2020-10-13 04:41:59,273 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@490952e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:41:59, skipping insertion in model container [2020-10-13 04:41:59,273 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 04:41:59" (1/1) ... [2020-10-13 04:41:59,282 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 04:41:59,304 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 04:41:59,488 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 04:41:59,492 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 04:41:59,518 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 04:41:59,538 INFO L208 MainTranslator]: Completed translation [2020-10-13 04:41:59,539 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:41:59 WrapperNode [2020-10-13 04:41:59,539 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 04:41:59,540 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 04:41:59,540 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 04:41:59,540 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 04:41:59,627 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:41:59" (1/1) ... [2020-10-13 04:41:59,627 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:41:59" (1/1) ... [2020-10-13 04:41:59,635 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:41:59" (1/1) ... [2020-10-13 04:41:59,635 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:41:59" (1/1) ... [2020-10-13 04:41:59,644 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:41:59" (1/1) ... [2020-10-13 04:41:59,650 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:41:59" (1/1) ... [2020-10-13 04:41:59,651 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:41:59" (1/1) ... [2020-10-13 04:41:59,654 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 04:41:59,654 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 04:41:59,654 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 04:41:59,655 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 04:41:59,655 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:41:59" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 04:41:59,724 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 04:41:59,724 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 04:41:59,724 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-13 04:41:59,724 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 04:41:59,725 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 04:41:59,725 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-13 04:41:59,725 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-13 04:41:59,725 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 04:41:59,725 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-13 04:41:59,725 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-13 04:41:59,726 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-13 04:41:59,726 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-13 04:41:59,726 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 04:41:59,726 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 04:42:00,047 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 04:42:00,047 INFO L295 CfgBuilder]: Removed 5 assume(true) statements. [2020-10-13 04:42:00,051 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 04:42:00 BoogieIcfgContainer [2020-10-13 04:42:00,051 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 04:42:00,052 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 04:42:00,052 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 04:42:00,055 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 04:42:00,056 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 04:41:59" (1/3) ... [2020-10-13 04:42:00,057 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c17ecf2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 04:42:00, skipping insertion in model container [2020-10-13 04:42:00,057 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:41:59" (2/3) ... [2020-10-13 04:42:00,057 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c17ecf2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 04:42:00, skipping insertion in model container [2020-10-13 04:42:00,058 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 04:42:00" (3/3) ... [2020-10-13 04:42:00,059 INFO L109 eAbstractionObserver]: Analyzing ICFG sorting_bubblesort_2_ground.i [2020-10-13 04:42:00,070 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 04:42:00,078 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 04:42:00,092 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 04:42:00,113 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 04:42:00,113 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 04:42:00,113 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 04:42:00,113 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 04:42:00,114 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 04:42:00,114 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 04:42:00,114 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 04:42:00,114 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 04:42:00,131 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states. [2020-10-13 04:42:00,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-13 04:42:00,137 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:42:00,138 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:42:00,138 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:42:00,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:42:00,143 INFO L82 PathProgramCache]: Analyzing trace with hash -1296691801, now seen corresponding path program 1 times [2020-10-13 04:42:00,150 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:42:00,150 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1853162505] [2020-10-13 04:42:00,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:42:00,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:00,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:00,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:00,386 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:42:00,386 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-13 04:42:00,387 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:42:00,387 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 132 [2020-10-13 04:42:00,389 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:42:00,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:42:00,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 04:42:00,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:42:00,391 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-13 04:42:00,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:42:00,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:00,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:00,468 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:42:00,468 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:42:00,469 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:42:00,469 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-13 04:42:00,469 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:42:00,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:42:00,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:42:00,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:42:00,471 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:42:00,480 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:42:00,481 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1853162505] [2020-10-13 04:42:00,484 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 04:42:00,484 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 04:42:00,485 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15371974] [2020-10-13 04:42:00,492 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-13 04:42:00,492 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:42:00,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-13 04:42:00,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 04:42:00,509 INFO L87 Difference]: Start difference. First operand 31 states. Second operand 3 states. [2020-10-13 04:42:00,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:42:00,610 INFO L93 Difference]: Finished difference Result 54 states and 75 transitions. [2020-10-13 04:42:00,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-13 04:42:00,612 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2020-10-13 04:42:00,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:42:00,621 INFO L225 Difference]: With dead ends: 54 [2020-10-13 04:42:00,621 INFO L226 Difference]: Without dead ends: 26 [2020-10-13 04:42:00,625 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 04:42:00,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-10-13 04:42:00,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-10-13 04:42:00,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-13 04:42:00,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2020-10-13 04:42:00,667 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 16 [2020-10-13 04:42:00,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:42:00,667 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2020-10-13 04:42:00,667 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-13 04:42:00,668 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2020-10-13 04:42:00,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-13 04:42:00,668 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:42:00,669 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:42:00,669 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 04:42:00,669 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:42:00,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:42:00,670 INFO L82 PathProgramCache]: Analyzing trace with hash -1547542812, now seen corresponding path program 1 times [2020-10-13 04:42:00,670 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:42:00,671 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2106924195] [2020-10-13 04:42:00,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:42:00,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:00,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:00,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:00,897 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:42:00,897 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-13 04:42:00,897 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:42:00,897 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 211 [2020-10-13 04:42:00,898 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:42:00,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 04:42:00,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:42:00,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 04:42:00,902 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-13 04:42:00,927 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:42:00,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:00,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:00,937 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:42:00,937 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:42:00,937 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:42:00,937 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 04:42:00,938 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:42:00,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:42:00,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:42:00,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:42:00,939 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:42:00,943 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:42:00,944 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2106924195] [2020-10-13 04:42:00,944 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 04:42:00,944 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 04:42:00,944 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64716788] [2020-10-13 04:42:00,946 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 04:42:00,947 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:42:00,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 04:42:00,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 04:42:00,947 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand 4 states. [2020-10-13 04:42:01,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:42:01,024 INFO L93 Difference]: Finished difference Result 46 states and 56 transitions. [2020-10-13 04:42:01,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 04:42:01,025 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2020-10-13 04:42:01,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:42:01,026 INFO L225 Difference]: With dead ends: 46 [2020-10-13 04:42:01,026 INFO L226 Difference]: Without dead ends: 28 [2020-10-13 04:42:01,028 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 04:42:01,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-13 04:42:01,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2020-10-13 04:42:01,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-13 04:42:01,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2020-10-13 04:42:01,036 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 16 [2020-10-13 04:42:01,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:42:01,036 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2020-10-13 04:42:01,036 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 04:42:01,037 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2020-10-13 04:42:01,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-13 04:42:01,037 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:42:01,038 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:42:01,038 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 04:42:01,038 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:42:01,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:42:01,039 INFO L82 PathProgramCache]: Analyzing trace with hash -1387426810, now seen corresponding path program 1 times [2020-10-13 04:42:01,039 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:42:01,039 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1582319607] [2020-10-13 04:42:01,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:42:01,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:01,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:01,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:01,311 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:42:01,312 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-13 04:42:01,312 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:42:01,312 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 258 [2020-10-13 04:42:01,312 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:42:01,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 04:42:01,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-13 04:42:01,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 04:42:01,314 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:42:01,357 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:42:01,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:01,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:01,364 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:42:01,364 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:42:01,364 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:42:01,365 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 04:42:01,365 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:42:01,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:42:01,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:42:01,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:42:01,366 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:42:01,370 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 04:42:01,370 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1582319607] [2020-10-13 04:42:01,370 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 04:42:01,371 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 04:42:01,371 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571937095] [2020-10-13 04:42:01,372 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 04:42:01,372 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:42:01,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 04:42:01,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 04:42:01,373 INFO L87 Difference]: Start difference. First operand 27 states and 32 transitions. Second operand 4 states. [2020-10-13 04:42:01,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:42:01,448 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2020-10-13 04:42:01,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 04:42:01,449 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2020-10-13 04:42:01,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:42:01,450 INFO L225 Difference]: With dead ends: 44 [2020-10-13 04:42:01,450 INFO L226 Difference]: Without dead ends: 31 [2020-10-13 04:42:01,451 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 04:42:01,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-13 04:42:01,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-10-13 04:42:01,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-13 04:42:01,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 38 transitions. [2020-10-13 04:42:01,458 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 38 transitions. Word has length 18 [2020-10-13 04:42:01,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:42:01,459 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 38 transitions. [2020-10-13 04:42:01,459 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 04:42:01,459 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 38 transitions. [2020-10-13 04:42:01,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-13 04:42:01,460 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:42:01,460 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:42:01,460 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 04:42:01,461 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:42:01,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:42:01,461 INFO L82 PathProgramCache]: Analyzing trace with hash 1108929549, now seen corresponding path program 1 times [2020-10-13 04:42:01,461 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:42:01,462 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [926477822] [2020-10-13 04:42:01,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:42:01,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:01,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:01,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:01,596 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:42:01,596 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-13 04:42:01,596 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:42:01,597 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 124 [2020-10-13 04:42:01,597 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:42:01,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 04:42:01,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-13 04:42:01,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 04:42:01,598 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:42:01,637 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:42:01,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:01,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:01,646 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:42:01,647 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:42:01,648 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:42:01,648 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 04:42:01,648 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:42:01,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:42:01,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:42:01,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:42:01,650 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:42:01,655 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 04:42:01,657 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [926477822] [2020-10-13 04:42:01,657 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 04:42:01,657 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 04:42:01,658 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572818300] [2020-10-13 04:42:01,658 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 04:42:01,658 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:42:01,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 04:42:01,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 04:42:01,660 INFO L87 Difference]: Start difference. First operand 31 states and 38 transitions. Second operand 4 states. [2020-10-13 04:42:01,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:42:01,734 INFO L93 Difference]: Finished difference Result 56 states and 71 transitions. [2020-10-13 04:42:01,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 04:42:01,735 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2020-10-13 04:42:01,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:42:01,736 INFO L225 Difference]: With dead ends: 56 [2020-10-13 04:42:01,737 INFO L226 Difference]: Without dead ends: 35 [2020-10-13 04:42:01,737 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 04:42:01,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-13 04:42:01,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32. [2020-10-13 04:42:01,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-13 04:42:01,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2020-10-13 04:42:01,744 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 20 [2020-10-13 04:42:01,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:42:01,744 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2020-10-13 04:42:01,745 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 04:42:01,745 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2020-10-13 04:42:01,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-13 04:42:01,746 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:42:01,746 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:42:01,746 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 04:42:01,746 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:42:01,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:42:01,747 INFO L82 PathProgramCache]: Analyzing trace with hash -2055572838, now seen corresponding path program 1 times [2020-10-13 04:42:01,747 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:42:01,748 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1548340988] [2020-10-13 04:42:01,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:42:01,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:01,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:01,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:01,921 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:42:01,921 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-13 04:42:01,921 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:42:01,922 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 163 [2020-10-13 04:42:01,922 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:42:01,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 04:42:01,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:42:01,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-13 04:42:01,923 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:42:01,948 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:42:01,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:01,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:01,952 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:42:01,952 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:42:01,952 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:42:01,953 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:42:01,953 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:42:01,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:42:01,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:42:01,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:42:01,954 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:42:01,956 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 04:42:01,957 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1548340988] [2020-10-13 04:42:01,957 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:42:01,957 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 04:42:01,957 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959294679] [2020-10-13 04:42:01,958 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 04:42:01,958 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:42:01,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 04:42:01,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 04:42:01,959 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand 5 states. [2020-10-13 04:42:02,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:42:02,033 INFO L93 Difference]: Finished difference Result 58 states and 72 transitions. [2020-10-13 04:42:02,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 04:42:02,033 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 23 [2020-10-13 04:42:02,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:42:02,034 INFO L225 Difference]: With dead ends: 58 [2020-10-13 04:42:02,034 INFO L226 Difference]: Without dead ends: 35 [2020-10-13 04:42:02,035 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 04:42:02,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-13 04:42:02,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2020-10-13 04:42:02,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-13 04:42:02,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 41 transitions. [2020-10-13 04:42:02,042 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 41 transitions. Word has length 23 [2020-10-13 04:42:02,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:42:02,042 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 41 transitions. [2020-10-13 04:42:02,042 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 04:42:02,043 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 41 transitions. [2020-10-13 04:42:02,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-13 04:42:02,043 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:42:02,044 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:42:02,044 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 04:42:02,044 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:42:02,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:42:02,045 INFO L82 PathProgramCache]: Analyzing trace with hash 442145592, now seen corresponding path program 2 times [2020-10-13 04:42:02,045 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:42:02,045 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1331360937] [2020-10-13 04:42:02,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:42:02,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:02,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:02,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:02,317 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:42:02,317 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-13 04:42:02,317 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:42:02,318 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 260 [2020-10-13 04:42:02,318 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:42:02,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 04:42:02,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-13 04:42:02,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-13 04:42:02,319 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:42:02,347 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:42:02,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:02,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:02,351 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:42:02,352 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:42:02,352 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:42:02,352 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:42:02,352 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:42:02,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:42:02,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:42:02,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:42:02,353 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:42:02,356 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-13 04:42:02,356 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1331360937] [2020-10-13 04:42:02,357 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:42:02,357 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 04:42:02,357 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839743158] [2020-10-13 04:42:02,358 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 04:42:02,358 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:42:02,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 04:42:02,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 04:42:02,359 INFO L87 Difference]: Start difference. First operand 34 states and 41 transitions. Second operand 5 states. [2020-10-13 04:42:02,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:42:02,434 INFO L93 Difference]: Finished difference Result 65 states and 83 transitions. [2020-10-13 04:42:02,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 04:42:02,435 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 25 [2020-10-13 04:42:02,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:42:02,435 INFO L225 Difference]: With dead ends: 65 [2020-10-13 04:42:02,436 INFO L226 Difference]: Without dead ends: 43 [2020-10-13 04:42:02,436 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 04:42:02,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-13 04:42:02,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 39. [2020-10-13 04:42:02,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-13 04:42:02,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 47 transitions. [2020-10-13 04:42:02,443 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 47 transitions. Word has length 25 [2020-10-13 04:42:02,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:42:02,443 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 47 transitions. [2020-10-13 04:42:02,443 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 04:42:02,443 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 47 transitions. [2020-10-13 04:42:02,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-13 04:42:02,444 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:42:02,445 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:42:02,445 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 04:42:02,445 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:42:02,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:42:02,446 INFO L82 PathProgramCache]: Analyzing trace with hash -1992691825, now seen corresponding path program 3 times [2020-10-13 04:42:02,446 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:42:02,446 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [438321791] [2020-10-13 04:42:02,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:42:02,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:02,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:02,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:02,837 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:42:02,837 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-13 04:42:02,838 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:42:02,838 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 380 [2020-10-13 04:42:02,838 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:42:02,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 04:42:02,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:42:02,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 04:42:02,840 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:42:02,899 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:42:02,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:02,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:02,907 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:42:02,907 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:42:02,908 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:42:02,909 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 04:42:02,909 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:42:02,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:42:02,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:42:02,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:42:02,910 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:42:02,914 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 04:42:02,915 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [438321791] [2020-10-13 04:42:02,915 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:42:02,916 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 04:42:02,917 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087120428] [2020-10-13 04:42:02,920 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 04:42:02,920 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:42:02,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 04:42:02,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 04:42:02,921 INFO L87 Difference]: Start difference. First operand 39 states and 47 transitions. Second operand 6 states. [2020-10-13 04:42:03,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:42:03,061 INFO L93 Difference]: Finished difference Result 70 states and 86 transitions. [2020-10-13 04:42:03,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 04:42:03,061 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 28 [2020-10-13 04:42:03,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:42:03,062 INFO L225 Difference]: With dead ends: 70 [2020-10-13 04:42:03,062 INFO L226 Difference]: Without dead ends: 42 [2020-10-13 04:42:03,064 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 04:42:03,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-13 04:42:03,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2020-10-13 04:42:03,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-13 04:42:03,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2020-10-13 04:42:03,076 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 28 [2020-10-13 04:42:03,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:42:03,078 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2020-10-13 04:42:03,078 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 04:42:03,078 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2020-10-13 04:42:03,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-13 04:42:03,081 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:42:03,081 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:42:03,081 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 04:42:03,082 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:42:03,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:42:03,082 INFO L82 PathProgramCache]: Analyzing trace with hash 1339062705, now seen corresponding path program 4 times [2020-10-13 04:42:03,083 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:42:03,083 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1108012663] [2020-10-13 04:42:03,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:42:03,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:03,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:03,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:03,717 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:42:03,718 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-13 04:42:03,718 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:42:03,718 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 614 [2020-10-13 04:42:03,718 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:42:03,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 04:42:03,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:42:03,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 04:42:03,719 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:42:03,762 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:42:03,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:03,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:03,766 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:42:03,767 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:42:03,767 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:42:03,767 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:42:03,767 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:42:03,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:42:03,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:42:03,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:42:03,768 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:42:03,771 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-13 04:42:03,772 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1108012663] [2020-10-13 04:42:03,772 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:42:03,773 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-13 04:42:03,773 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530698702] [2020-10-13 04:42:03,773 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 04:42:03,774 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:42:03,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 04:42:03,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 04:42:03,774 INFO L87 Difference]: Start difference. First operand 41 states and 49 transitions. Second operand 7 states. [2020-10-13 04:42:03,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:42:03,860 INFO L93 Difference]: Finished difference Result 72 states and 88 transitions. [2020-10-13 04:42:03,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 04:42:03,860 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 30 [2020-10-13 04:42:03,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:42:03,861 INFO L225 Difference]: With dead ends: 72 [2020-10-13 04:42:03,861 INFO L226 Difference]: Without dead ends: 44 [2020-10-13 04:42:03,862 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 04:42:03,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-13 04:42:03,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2020-10-13 04:42:03,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-13 04:42:03,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 51 transitions. [2020-10-13 04:42:03,868 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 51 transitions. Word has length 30 [2020-10-13 04:42:03,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:42:03,869 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 51 transitions. [2020-10-13 04:42:03,869 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 04:42:03,869 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 51 transitions. [2020-10-13 04:42:03,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-13 04:42:03,870 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:42:03,870 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:42:03,870 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 04:42:03,871 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:42:03,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:42:03,871 INFO L82 PathProgramCache]: Analyzing trace with hash -890436781, now seen corresponding path program 5 times [2020-10-13 04:42:03,871 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:42:03,872 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [483615534] [2020-10-13 04:42:03,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:42:03,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:03,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:03,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:04,531 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:42:04,532 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-13 04:42:04,532 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:42:04,532 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 649 [2020-10-13 04:42:04,532 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:42:04,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 04:42:04,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-13 04:42:04,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 04:42:04,533 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:42:04,575 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:42:04,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:04,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:04,579 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:42:04,579 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:42:04,579 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:42:04,579 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:42:04,580 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:42:04,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:42:04,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:42:04,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:42:04,580 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:42:04,584 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-13 04:42:04,588 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [483615534] [2020-10-13 04:42:04,590 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:42:04,590 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 04:42:04,590 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574134656] [2020-10-13 04:42:04,591 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 04:42:04,591 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:42:04,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 04:42:04,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 04:42:04,592 INFO L87 Difference]: Start difference. First operand 43 states and 51 transitions. Second operand 6 states. [2020-10-13 04:42:04,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:42:04,684 INFO L93 Difference]: Finished difference Result 80 states and 101 transitions. [2020-10-13 04:42:04,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 04:42:04,685 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 32 [2020-10-13 04:42:04,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:42:04,686 INFO L225 Difference]: With dead ends: 80 [2020-10-13 04:42:04,686 INFO L226 Difference]: Without dead ends: 53 [2020-10-13 04:42:04,687 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 04:42:04,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-13 04:42:04,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 49. [2020-10-13 04:42:04,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-13 04:42:04,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 59 transitions. [2020-10-13 04:42:04,697 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 59 transitions. Word has length 32 [2020-10-13 04:42:04,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:42:04,697 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 59 transitions. [2020-10-13 04:42:04,697 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 04:42:04,698 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 59 transitions. [2020-10-13 04:42:04,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-13 04:42:04,699 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:42:04,699 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:42:04,699 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 04:42:04,699 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:42:04,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:42:04,700 INFO L82 PathProgramCache]: Analyzing trace with hash 1723518356, now seen corresponding path program 6 times [2020-10-13 04:42:04,700 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:42:04,700 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [820769868] [2020-10-13 04:42:04,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:42:04,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:04,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:04,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:05,481 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:42:05,481 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-13 04:42:05,481 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:42:05,481 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 768 [2020-10-13 04:42:05,482 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:42:05,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 04:42:05,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:42:05,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-13 04:42:05,482 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:42:05,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:42:05,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:05,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:05,549 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:42:05,549 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:42:05,550 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:42:05,550 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 04:42:05,550 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:42:05,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:42:05,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:42:05,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:42:05,551 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:42:05,555 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-10-13 04:42:05,556 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [820769868] [2020-10-13 04:42:05,556 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:42:05,556 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 04:42:05,556 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796614293] [2020-10-13 04:42:05,557 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 04:42:05,557 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:42:05,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 04:42:05,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-13 04:42:05,558 INFO L87 Difference]: Start difference. First operand 49 states and 59 transitions. Second operand 8 states. [2020-10-13 04:42:05,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:42:05,675 INFO L93 Difference]: Finished difference Result 86 states and 106 transitions. [2020-10-13 04:42:05,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-13 04:42:05,675 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 35 [2020-10-13 04:42:05,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:42:05,676 INFO L225 Difference]: With dead ends: 86 [2020-10-13 04:42:05,677 INFO L226 Difference]: Without dead ends: 52 [2020-10-13 04:42:05,677 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-13 04:42:05,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-13 04:42:05,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2020-10-13 04:42:05,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-13 04:42:05,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 61 transitions. [2020-10-13 04:42:05,691 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 61 transitions. Word has length 35 [2020-10-13 04:42:05,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:42:05,692 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 61 transitions. [2020-10-13 04:42:05,692 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 04:42:05,692 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 61 transitions. [2020-10-13 04:42:05,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-13 04:42:05,698 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:42:05,698 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:42:05,698 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 04:42:05,698 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:42:05,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:42:05,699 INFO L82 PathProgramCache]: Analyzing trace with hash 1501362482, now seen corresponding path program 7 times [2020-10-13 04:42:05,699 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:42:05,699 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [896374189] [2020-10-13 04:42:05,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:42:05,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:05,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:05,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:06,640 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:42:06,640 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-13 04:42:06,640 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:42:06,641 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 923 [2020-10-13 04:42:06,641 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:42:06,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 04:42:06,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-13 04:42:06,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-13 04:42:06,642 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:42:06,694 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:42:06,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:06,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:06,698 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:42:06,699 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:42:06,699 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:42:06,699 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:42:06,699 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:42:06,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:42:06,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:42:06,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:42:06,700 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:42:06,705 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-13 04:42:06,706 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [896374189] [2020-10-13 04:42:06,706 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:42:06,706 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-13 04:42:06,707 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644419153] [2020-10-13 04:42:06,708 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 04:42:06,709 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:42:06,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 04:42:06,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 04:42:06,710 INFO L87 Difference]: Start difference. First operand 51 states and 61 transitions. Second operand 7 states. [2020-10-13 04:42:06,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:42:06,819 INFO L93 Difference]: Finished difference Result 94 states and 119 transitions. [2020-10-13 04:42:06,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 04:42:06,820 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 37 [2020-10-13 04:42:06,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:42:06,822 INFO L225 Difference]: With dead ends: 94 [2020-10-13 04:42:06,825 INFO L226 Difference]: Without dead ends: 61 [2020-10-13 04:42:06,826 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 04:42:06,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-13 04:42:06,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 57. [2020-10-13 04:42:06,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-13 04:42:06,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 69 transitions. [2020-10-13 04:42:06,841 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 69 transitions. Word has length 37 [2020-10-13 04:42:06,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:42:06,842 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 69 transitions. [2020-10-13 04:42:06,843 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 04:42:06,844 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 69 transitions. [2020-10-13 04:42:06,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-13 04:42:06,846 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:42:06,846 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:42:06,846 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 04:42:06,847 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:42:06,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:42:06,850 INFO L82 PathProgramCache]: Analyzing trace with hash -1987045547, now seen corresponding path program 8 times [2020-10-13 04:42:06,850 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:42:06,850 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [236648566] [2020-10-13 04:42:06,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:42:06,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:06,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:06,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:08,131 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:42:08,132 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-13 04:42:08,132 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:42:08,132 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1252 [2020-10-13 04:42:08,132 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:42:08,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 04:42:08,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:42:08,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-13 04:42:08,133 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:42:08,206 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:42:08,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:08,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:08,209 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:42:08,210 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:42:08,210 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:42:08,210 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:42:08,210 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:42:08,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:42:08,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:42:08,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:42:08,211 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:42:08,215 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2020-10-13 04:42:08,215 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [236648566] [2020-10-13 04:42:08,216 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:42:08,216 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 04:42:08,216 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369762042] [2020-10-13 04:42:08,216 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 04:42:08,217 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:42:08,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 04:42:08,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-13 04:42:08,217 INFO L87 Difference]: Start difference. First operand 57 states and 69 transitions. Second operand 9 states. [2020-10-13 04:42:08,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:42:08,314 INFO L93 Difference]: Finished difference Result 100 states and 124 transitions. [2020-10-13 04:42:08,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 04:42:08,315 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 40 [2020-10-13 04:42:08,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:42:08,316 INFO L225 Difference]: With dead ends: 100 [2020-10-13 04:42:08,316 INFO L226 Difference]: Without dead ends: 60 [2020-10-13 04:42:08,316 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-13 04:42:08,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-13 04:42:08,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2020-10-13 04:42:08,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-13 04:42:08,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 71 transitions. [2020-10-13 04:42:08,327 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 71 transitions. Word has length 40 [2020-10-13 04:42:08,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:42:08,327 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 71 transitions. [2020-10-13 04:42:08,327 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 04:42:08,327 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 71 transitions. [2020-10-13 04:42:08,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-13 04:42:08,330 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:42:08,330 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:42:08,330 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-13 04:42:08,330 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:42:08,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:42:08,331 INFO L82 PathProgramCache]: Analyzing trace with hash 1846443639, now seen corresponding path program 9 times [2020-10-13 04:42:08,331 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:42:08,331 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1059673467] [2020-10-13 04:42:08,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:42:08,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:08,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:08,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:09,783 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:42:09,784 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-13 04:42:09,785 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:42:09,785 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1439 [2020-10-13 04:42:09,785 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:42:09,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 04:42:09,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:42:09,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 04:42:09,786 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:42:09,870 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:42:09,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:09,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:09,873 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:42:09,874 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:42:09,874 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:42:09,874 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:42:09,874 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:42:09,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:42:09,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:42:09,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:42:09,875 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:42:09,879 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2020-10-13 04:42:09,879 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1059673467] [2020-10-13 04:42:09,880 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:42:09,880 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 04:42:09,880 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827696708] [2020-10-13 04:42:09,881 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 04:42:09,881 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:42:09,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 04:42:09,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-13 04:42:09,882 INFO L87 Difference]: Start difference. First operand 59 states and 71 transitions. Second operand 10 states. [2020-10-13 04:42:09,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:42:09,993 INFO L93 Difference]: Finished difference Result 102 states and 126 transitions. [2020-10-13 04:42:09,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 04:42:09,993 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 42 [2020-10-13 04:42:09,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:42:09,994 INFO L225 Difference]: With dead ends: 102 [2020-10-13 04:42:09,994 INFO L226 Difference]: Without dead ends: 62 [2020-10-13 04:42:09,995 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-13 04:42:09,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-13 04:42:10,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2020-10-13 04:42:10,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-13 04:42:10,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 73 transitions. [2020-10-13 04:42:10,003 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 73 transitions. Word has length 42 [2020-10-13 04:42:10,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:42:10,004 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 73 transitions. [2020-10-13 04:42:10,004 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 04:42:10,004 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 73 transitions. [2020-10-13 04:42:10,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-13 04:42:10,005 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:42:10,007 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:42:10,007 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-13 04:42:10,007 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:42:10,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:42:10,008 INFO L82 PathProgramCache]: Analyzing trace with hash 747611417, now seen corresponding path program 10 times [2020-10-13 04:42:10,008 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:42:10,008 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [598335910] [2020-10-13 04:42:10,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:42:10,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:10,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:10,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:11,843 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:42:11,844 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-13 04:42:11,844 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:42:11,844 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1821 [2020-10-13 04:42:11,844 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:42:11,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 04:42:11,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-13 04:42:11,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 04:42:11,845 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:42:11,909 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:42:11,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:11,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:11,914 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:42:11,914 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:42:11,914 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:42:11,915 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:42:11,915 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:42:11,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:42:11,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:42:11,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:42:11,917 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:42:11,922 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 1 proven. 22 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-10-13 04:42:11,922 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [598335910] [2020-10-13 04:42:11,923 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:42:11,923 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 04:42:11,924 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449147662] [2020-10-13 04:42:11,924 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 04:42:11,924 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:42:11,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 04:42:11,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-13 04:42:11,925 INFO L87 Difference]: Start difference. First operand 61 states and 73 transitions. Second operand 8 states. [2020-10-13 04:42:12,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:42:12,080 INFO L93 Difference]: Finished difference Result 110 states and 139 transitions. [2020-10-13 04:42:12,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-13 04:42:12,081 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 44 [2020-10-13 04:42:12,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:42:12,082 INFO L225 Difference]: With dead ends: 110 [2020-10-13 04:42:12,082 INFO L226 Difference]: Without dead ends: 71 [2020-10-13 04:42:12,083 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-13 04:42:12,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-13 04:42:12,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 67. [2020-10-13 04:42:12,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-13 04:42:12,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 81 transitions. [2020-10-13 04:42:12,090 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 81 transitions. Word has length 44 [2020-10-13 04:42:12,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:42:12,091 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 81 transitions. [2020-10-13 04:42:12,091 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 04:42:12,091 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 81 transitions. [2020-10-13 04:42:12,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-13 04:42:12,092 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:42:12,093 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:42:12,093 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-13 04:42:12,093 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:42:12,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:42:12,094 INFO L82 PathProgramCache]: Analyzing trace with hash 1398967822, now seen corresponding path program 11 times [2020-10-13 04:42:12,094 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:42:12,095 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1455850761] [2020-10-13 04:42:12,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:42:12,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:12,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:12,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:14,085 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:42:14,085 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-13 04:42:14,086 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:42:14,086 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1977 [2020-10-13 04:42:14,086 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:42:14,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 04:42:14,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:42:14,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 04:42:14,087 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:42:14,214 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:42:14,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:14,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:14,217 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:42:14,217 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:42:14,218 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:42:14,218 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:42:14,218 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:42:14,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:42:14,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:42:14,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:42:14,219 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:42:14,223 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-13 04:42:14,224 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1455850761] [2020-10-13 04:42:14,224 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:42:14,224 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-13 04:42:14,224 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527385708] [2020-10-13 04:42:14,225 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 04:42:14,225 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:42:14,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 04:42:14,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-13 04:42:14,226 INFO L87 Difference]: Start difference. First operand 67 states and 81 transitions. Second operand 11 states. [2020-10-13 04:42:14,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:42:14,314 INFO L93 Difference]: Finished difference Result 116 states and 144 transitions. [2020-10-13 04:42:14,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 04:42:14,315 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 47 [2020-10-13 04:42:14,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:42:14,316 INFO L225 Difference]: With dead ends: 116 [2020-10-13 04:42:14,316 INFO L226 Difference]: Without dead ends: 70 [2020-10-13 04:42:14,317 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-13 04:42:14,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-13 04:42:14,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 69. [2020-10-13 04:42:14,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-13 04:42:14,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 83 transitions. [2020-10-13 04:42:14,332 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 83 transitions. Word has length 47 [2020-10-13 04:42:14,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:42:14,333 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 83 transitions. [2020-10-13 04:42:14,333 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 04:42:14,333 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 83 transitions. [2020-10-13 04:42:14,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-13 04:42:14,333 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:42:14,334 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:42:14,334 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-13 04:42:14,336 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:42:14,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:42:14,336 INFO L82 PathProgramCache]: Analyzing trace with hash 1780104364, now seen corresponding path program 12 times [2020-10-13 04:42:14,336 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:42:14,337 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1578429958] [2020-10-13 04:42:14,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:42:14,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:14,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:14,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:16,506 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:42:16,506 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-13 04:42:16,506 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:42:16,507 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2156 [2020-10-13 04:42:16,507 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:42:16,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 04:42:16,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-10-13 04:42:16,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-13 04:42:16,508 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:42:16,574 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:42:16,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:16,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:16,577 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:42:16,577 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:42:16,577 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:42:16,577 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:42:16,578 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:42:16,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:42:16,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:42:16,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:42:16,579 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:42:16,586 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-10-13 04:42:16,587 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1578429958] [2020-10-13 04:42:16,589 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:42:16,589 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 04:42:16,590 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170526051] [2020-10-13 04:42:16,590 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 04:42:16,590 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:42:16,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 04:42:16,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-13 04:42:16,591 INFO L87 Difference]: Start difference. First operand 69 states and 83 transitions. Second operand 9 states. [2020-10-13 04:42:16,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:42:16,686 INFO L93 Difference]: Finished difference Result 124 states and 157 transitions. [2020-10-13 04:42:16,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 04:42:16,686 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 49 [2020-10-13 04:42:16,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:42:16,687 INFO L225 Difference]: With dead ends: 124 [2020-10-13 04:42:16,687 INFO L226 Difference]: Without dead ends: 79 [2020-10-13 04:42:16,688 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-13 04:42:16,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-13 04:42:16,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 75. [2020-10-13 04:42:16,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-13 04:42:16,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 91 transitions. [2020-10-13 04:42:16,693 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 91 transitions. Word has length 49 [2020-10-13 04:42:16,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:42:16,693 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 91 transitions. [2020-10-13 04:42:16,693 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 04:42:16,693 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 91 transitions. [2020-10-13 04:42:16,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-13 04:42:16,694 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:42:16,694 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:42:16,694 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-13 04:42:16,694 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:42:16,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:42:16,695 INFO L82 PathProgramCache]: Analyzing trace with hash -159422053, now seen corresponding path program 13 times [2020-10-13 04:42:16,695 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:42:16,695 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [326247486] [2020-10-13 04:42:16,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:42:16,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:16,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:16,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:19,207 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:42:19,208 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-13 04:42:19,208 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:42:19,208 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2502 [2020-10-13 04:42:19,208 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:42:19,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 04:42:19,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:42:19,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-13 04:42:19,209 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:42:19,323 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:42:19,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:19,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:19,327 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:42:19,328 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:42:19,328 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:42:19,328 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:42:19,329 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:42:19,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:42:19,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:42:19,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:42:19,330 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:42:19,337 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2020-10-13 04:42:19,337 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [326247486] [2020-10-13 04:42:19,338 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:42:19,338 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 04:42:19,338 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296981373] [2020-10-13 04:42:19,339 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 04:42:19,340 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:42:19,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 04:42:19,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-13 04:42:19,341 INFO L87 Difference]: Start difference. First operand 75 states and 91 transitions. Second operand 12 states. [2020-10-13 04:42:19,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:42:19,498 INFO L93 Difference]: Finished difference Result 130 states and 162 transitions. [2020-10-13 04:42:19,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-13 04:42:19,499 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 52 [2020-10-13 04:42:19,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:42:19,500 INFO L225 Difference]: With dead ends: 130 [2020-10-13 04:42:19,501 INFO L226 Difference]: Without dead ends: 78 [2020-10-13 04:42:19,501 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-13 04:42:19,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-13 04:42:19,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 77. [2020-10-13 04:42:19,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-13 04:42:19,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 93 transitions. [2020-10-13 04:42:19,507 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 93 transitions. Word has length 52 [2020-10-13 04:42:19,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:42:19,509 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 93 transitions. [2020-10-13 04:42:19,509 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 04:42:19,509 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 93 transitions. [2020-10-13 04:42:19,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-13 04:42:19,510 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:42:19,510 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:42:19,510 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-13 04:42:19,510 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:42:19,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:42:19,511 INFO L82 PathProgramCache]: Analyzing trace with hash 1929522621, now seen corresponding path program 14 times [2020-10-13 04:42:19,511 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:42:19,511 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [82356963] [2020-10-13 04:42:19,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:42:19,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:19,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:19,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:22,128 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:42:22,129 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-13 04:42:22,129 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:42:22,129 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2606 [2020-10-13 04:42:22,129 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:42:22,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 04:42:22,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:42:22,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-13 04:42:22,130 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:42:22,239 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:42:22,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:22,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:22,242 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:42:22,243 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:42:22,243 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:42:22,243 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:42:22,243 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:42:22,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:42:22,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:42:22,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:42:22,244 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:42:22,249 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2020-10-13 04:42:22,249 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [82356963] [2020-10-13 04:42:22,250 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:42:22,250 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-13 04:42:22,253 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576567455] [2020-10-13 04:42:22,254 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-13 04:42:22,254 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:42:22,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-13 04:42:22,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-13 04:42:22,255 INFO L87 Difference]: Start difference. First operand 77 states and 93 transitions. Second operand 13 states. [2020-10-13 04:42:22,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:42:22,383 INFO L93 Difference]: Finished difference Result 132 states and 164 transitions. [2020-10-13 04:42:22,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 04:42:22,384 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 54 [2020-10-13 04:42:22,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:42:22,385 INFO L225 Difference]: With dead ends: 132 [2020-10-13 04:42:22,385 INFO L226 Difference]: Without dead ends: 80 [2020-10-13 04:42:22,386 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-13 04:42:22,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-13 04:42:22,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2020-10-13 04:42:22,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-13 04:42:22,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 95 transitions. [2020-10-13 04:42:22,396 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 95 transitions. Word has length 54 [2020-10-13 04:42:22,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:42:22,396 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 95 transitions. [2020-10-13 04:42:22,396 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-13 04:42:22,397 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 95 transitions. [2020-10-13 04:42:22,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-13 04:42:22,397 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:42:22,397 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:42:22,398 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-13 04:42:22,398 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:42:22,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:42:22,398 INFO L82 PathProgramCache]: Analyzing trace with hash -639340193, now seen corresponding path program 15 times [2020-10-13 04:42:22,399 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:42:22,399 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2120181667] [2020-10-13 04:42:22,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:42:22,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:22,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:22,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:25,327 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:42:25,327 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-13 04:42:25,328 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:42:25,328 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2915 [2020-10-13 04:42:25,328 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:42:25,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 04:42:25,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 34 [2020-10-13 04:42:25,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-13 04:42:25,329 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:42:25,397 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:42:25,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:25,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:25,400 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:42:25,400 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:42:25,401 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:42:25,401 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:42:25,401 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:42:25,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:42:25,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:42:25,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:42:25,402 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:42:25,406 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 1 proven. 51 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-10-13 04:42:25,407 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2120181667] [2020-10-13 04:42:25,407 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:42:25,407 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 04:42:25,407 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930134861] [2020-10-13 04:42:25,409 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 04:42:25,409 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:42:25,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 04:42:25,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-13 04:42:25,410 INFO L87 Difference]: Start difference. First operand 79 states and 95 transitions. Second operand 10 states. [2020-10-13 04:42:25,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:42:25,510 INFO L93 Difference]: Finished difference Result 140 states and 177 transitions. [2020-10-13 04:42:25,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 04:42:25,511 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 56 [2020-10-13 04:42:25,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:42:25,512 INFO L225 Difference]: With dead ends: 140 [2020-10-13 04:42:25,512 INFO L226 Difference]: Without dead ends: 89 [2020-10-13 04:42:25,513 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-13 04:42:25,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-13 04:42:25,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 85. [2020-10-13 04:42:25,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-13 04:42:25,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 103 transitions. [2020-10-13 04:42:25,518 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 103 transitions. Word has length 56 [2020-10-13 04:42:25,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:42:25,519 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 103 transitions. [2020-10-13 04:42:25,519 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 04:42:25,519 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 103 transitions. [2020-10-13 04:42:25,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-13 04:42:25,520 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:42:25,520 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:42:25,521 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-13 04:42:25,521 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:42:25,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:42:25,521 INFO L82 PathProgramCache]: Analyzing trace with hash 308941832, now seen corresponding path program 16 times [2020-10-13 04:42:25,522 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:42:25,522 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1744441715] [2020-10-13 04:42:25,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:42:25,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:25,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:25,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:28,112 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:42:28,112 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-13 04:42:28,113 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:42:28,113 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2576 [2020-10-13 04:42:28,113 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:42:28,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 04:42:28,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:42:28,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-13 04:42:28,114 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:42:28,228 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:42:28,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:28,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:28,230 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:42:28,231 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:42:28,231 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:42:28,231 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:42:28,231 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:42:28,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:42:28,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:42:28,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:42:28,232 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:42:28,237 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2020-10-13 04:42:28,237 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1744441715] [2020-10-13 04:42:28,237 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:42:28,237 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 04:42:28,237 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279754980] [2020-10-13 04:42:28,238 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 04:42:28,238 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:42:28,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 04:42:28,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-13 04:42:28,239 INFO L87 Difference]: Start difference. First operand 85 states and 103 transitions. Second operand 14 states. [2020-10-13 04:42:28,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:42:28,360 INFO L93 Difference]: Finished difference Result 146 states and 182 transitions. [2020-10-13 04:42:28,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 04:42:28,361 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 59 [2020-10-13 04:42:28,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:42:28,363 INFO L225 Difference]: With dead ends: 146 [2020-10-13 04:42:28,363 INFO L226 Difference]: Without dead ends: 88 [2020-10-13 04:42:28,364 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-13 04:42:28,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-13 04:42:28,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 87. [2020-10-13 04:42:28,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-13 04:42:28,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 105 transitions. [2020-10-13 04:42:28,369 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 105 transitions. Word has length 59 [2020-10-13 04:42:28,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:42:28,370 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 105 transitions. [2020-10-13 04:42:28,370 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 04:42:28,370 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 105 transitions. [2020-10-13 04:42:28,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-13 04:42:28,371 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:42:28,371 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:42:28,371 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-13 04:42:28,371 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:42:28,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:42:28,372 INFO L82 PathProgramCache]: Analyzing trace with hash 300598694, now seen corresponding path program 17 times [2020-10-13 04:42:28,372 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:42:28,372 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1438443188] [2020-10-13 04:42:28,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:42:28,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:28,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:28,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:31,403 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:42:31,403 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-13 04:42:31,403 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:42:31,403 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3014 [2020-10-13 04:42:31,403 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:42:31,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 04:42:31,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-10-13 04:42:31,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-13 04:42:31,404 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:42:31,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:42:31,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:31,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:31,499 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:42:31,500 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:42:31,500 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:42:31,500 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-13 04:42:31,501 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:42:31,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:42:31,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:42:31,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:42:31,504 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-13 04:42:31,520 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 1 proven. 70 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2020-10-13 04:42:31,521 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1438443188] [2020-10-13 04:42:31,523 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:42:31,523 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-13 04:42:31,524 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442260645] [2020-10-13 04:42:31,524 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 04:42:31,525 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:42:31,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 04:42:31,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-13 04:42:31,526 INFO L87 Difference]: Start difference. First operand 87 states and 105 transitions. Second operand 11 states. [2020-10-13 04:42:31,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:42:31,706 INFO L93 Difference]: Finished difference Result 154 states and 195 transitions. [2020-10-13 04:42:31,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 04:42:31,706 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 61 [2020-10-13 04:42:31,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:42:31,708 INFO L225 Difference]: With dead ends: 154 [2020-10-13 04:42:31,708 INFO L226 Difference]: Without dead ends: 97 [2020-10-13 04:42:31,709 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-13 04:42:31,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-13 04:42:31,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 93. [2020-10-13 04:42:31,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-13 04:42:31,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 113 transitions. [2020-10-13 04:42:31,715 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 113 transitions. Word has length 61 [2020-10-13 04:42:31,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:42:31,716 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 113 transitions. [2020-10-13 04:42:31,716 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 04:42:31,716 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 113 transitions. [2020-10-13 04:42:31,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-13 04:42:31,717 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:42:31,717 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:42:31,717 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-13 04:42:31,717 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:42:31,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:42:31,718 INFO L82 PathProgramCache]: Analyzing trace with hash -1158445471, now seen corresponding path program 18 times [2020-10-13 04:42:31,718 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:42:31,720 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1675613158] [2020-10-13 04:42:31,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:42:31,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:31,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:31,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:35,354 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:42:35,355 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-13 04:42:35,355 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:42:35,355 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3613 [2020-10-13 04:42:35,355 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:42:35,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-13 04:42:35,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:42:35,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-13 04:42:35,356 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:42:35,507 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:42:35,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:35,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:35,510 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:42:35,511 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:42:35,511 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:42:35,511 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:42:35,512 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:42:35,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:42:35,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:42:35,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:42:35,512 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:42:35,519 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2020-10-13 04:42:35,519 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1675613158] [2020-10-13 04:42:35,520 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:42:35,520 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-13 04:42:35,520 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099107414] [2020-10-13 04:42:35,521 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-13 04:42:35,521 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:42:35,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-13 04:42:35,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-13 04:42:35,522 INFO L87 Difference]: Start difference. First operand 93 states and 113 transitions. Second operand 15 states. [2020-10-13 04:42:35,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:42:35,671 INFO L93 Difference]: Finished difference Result 160 states and 200 transitions. [2020-10-13 04:42:35,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-13 04:42:35,674 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 64 [2020-10-13 04:42:35,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:42:35,675 INFO L225 Difference]: With dead ends: 160 [2020-10-13 04:42:35,675 INFO L226 Difference]: Without dead ends: 96 [2020-10-13 04:42:35,675 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-13 04:42:35,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-13 04:42:35,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 95. [2020-10-13 04:42:35,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-13 04:42:35,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 115 transitions. [2020-10-13 04:42:35,683 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 115 transitions. Word has length 64 [2020-10-13 04:42:35,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:42:35,684 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 115 transitions. [2020-10-13 04:42:35,684 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-13 04:42:35,684 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 115 transitions. [2020-10-13 04:42:35,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-13 04:42:35,685 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:42:35,685 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:42:35,685 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-13 04:42:35,685 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:42:35,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:42:35,686 INFO L82 PathProgramCache]: Analyzing trace with hash -2099828861, now seen corresponding path program 19 times [2020-10-13 04:42:35,686 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:42:35,689 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [707385188] [2020-10-13 04:42:35,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:42:35,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:35,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:35,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:39,200 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:42:39,200 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-13 04:42:39,200 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:42:39,201 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3496 [2020-10-13 04:42:39,201 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:42:39,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 04:42:39,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:42:39,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-13 04:42:39,201 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:42:39,346 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:42:39,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:39,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:39,350 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:42:39,350 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:42:39,350 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:42:39,350 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:42:39,351 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:42:39,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:42:39,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:42:39,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:42:39,351 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:42:39,357 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2020-10-13 04:42:39,357 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [707385188] [2020-10-13 04:42:39,359 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:42:39,359 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 04:42:39,361 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500265394] [2020-10-13 04:42:39,361 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 04:42:39,361 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:42:39,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 04:42:39,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-13 04:42:39,362 INFO L87 Difference]: Start difference. First operand 95 states and 115 transitions. Second operand 16 states. [2020-10-13 04:42:39,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:42:39,482 INFO L93 Difference]: Finished difference Result 162 states and 202 transitions. [2020-10-13 04:42:39,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-13 04:42:39,483 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 66 [2020-10-13 04:42:39,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:42:39,484 INFO L225 Difference]: With dead ends: 162 [2020-10-13 04:42:39,484 INFO L226 Difference]: Without dead ends: 98 [2020-10-13 04:42:39,485 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-13 04:42:39,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-13 04:42:39,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97. [2020-10-13 04:42:39,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-13 04:42:39,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 117 transitions. [2020-10-13 04:42:39,491 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 117 transitions. Word has length 66 [2020-10-13 04:42:39,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:42:39,491 INFO L479 AbstractCegarLoop]: Abstraction has 97 states and 117 transitions. [2020-10-13 04:42:39,491 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 04:42:39,492 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 117 transitions. [2020-10-13 04:42:39,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-13 04:42:39,492 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:42:39,492 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:42:39,493 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-13 04:42:39,493 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:42:39,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:42:39,493 INFO L82 PathProgramCache]: Analyzing trace with hash -531167195, now seen corresponding path program 20 times [2020-10-13 04:42:39,493 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:42:39,494 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [476126145] [2020-10-13 04:42:39,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:42:39,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:39,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:39,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:43,513 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:42:43,513 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-13 04:42:43,513 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:42:43,513 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4005 [2020-10-13 04:42:43,513 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:42:43,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 04:42:43,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 40 [2020-10-13 04:42:43,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-13 04:42:43,514 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:42:43,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:42:43,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:43,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:43,599 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:42:43,599 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:42:43,599 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:42:43,599 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:42:43,599 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:42:43,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:42:43,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:42:43,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:42:43,600 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:42:43,605 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 1 proven. 92 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2020-10-13 04:42:43,605 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [476126145] [2020-10-13 04:42:43,605 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:42:43,605 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 04:42:43,606 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328333225] [2020-10-13 04:42:43,606 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 04:42:43,606 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:42:43,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 04:42:43,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-13 04:42:43,607 INFO L87 Difference]: Start difference. First operand 97 states and 117 transitions. Second operand 12 states. [2020-10-13 04:42:43,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:42:43,733 INFO L93 Difference]: Finished difference Result 170 states and 215 transitions. [2020-10-13 04:42:43,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-13 04:42:43,734 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 68 [2020-10-13 04:42:43,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:42:43,735 INFO L225 Difference]: With dead ends: 170 [2020-10-13 04:42:43,735 INFO L226 Difference]: Without dead ends: 107 [2020-10-13 04:42:43,736 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-13 04:42:43,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-13 04:42:43,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 103. [2020-10-13 04:42:43,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-10-13 04:42:43,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 125 transitions. [2020-10-13 04:42:43,741 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 125 transitions. Word has length 68 [2020-10-13 04:42:43,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:42:43,741 INFO L479 AbstractCegarLoop]: Abstraction has 103 states and 125 transitions. [2020-10-13 04:42:43,741 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 04:42:43,741 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 125 transitions. [2020-10-13 04:42:43,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-13 04:42:43,742 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:42:43,742 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:42:43,743 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-13 04:42:43,743 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:42:43,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:42:43,743 INFO L82 PathProgramCache]: Analyzing trace with hash 1665253250, now seen corresponding path program 21 times [2020-10-13 04:42:43,743 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:42:43,743 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1688151079] [2020-10-13 04:42:43,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:42:43,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:43,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:43,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:48,652 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:42:48,652 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-13 04:42:48,652 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:42:48,653 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4896 [2020-10-13 04:42:48,653 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:42:48,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-13 04:42:48,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:42:48,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-13 04:42:48,653 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:42:48,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:42:48,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:48,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:48,815 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:42:48,815 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:42:48,815 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:42:48,815 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:42:48,815 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:42:48,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:42:48,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:42:48,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:42:48,816 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:42:48,821 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2020-10-13 04:42:48,822 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1688151079] [2020-10-13 04:42:48,822 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:42:48,822 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-13 04:42:48,822 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877438850] [2020-10-13 04:42:48,823 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-13 04:42:48,823 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:42:48,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-13 04:42:48,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-13 04:42:48,823 INFO L87 Difference]: Start difference. First operand 103 states and 125 transitions. Second operand 17 states. [2020-10-13 04:42:48,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:42:48,966 INFO L93 Difference]: Finished difference Result 176 states and 220 transitions. [2020-10-13 04:42:48,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-13 04:42:48,967 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 71 [2020-10-13 04:42:48,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:42:48,968 INFO L225 Difference]: With dead ends: 176 [2020-10-13 04:42:48,968 INFO L226 Difference]: Without dead ends: 106 [2020-10-13 04:42:48,969 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-13 04:42:48,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-13 04:42:48,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 105. [2020-10-13 04:42:48,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-13 04:42:48,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 127 transitions. [2020-10-13 04:42:48,974 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 127 transitions. Word has length 71 [2020-10-13 04:42:48,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:42:48,974 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 127 transitions. [2020-10-13 04:42:48,974 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-13 04:42:48,975 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 127 transitions. [2020-10-13 04:42:48,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-13 04:42:48,975 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:42:48,975 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:42:48,976 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-13 04:42:48,976 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:42:48,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:42:48,976 INFO L82 PathProgramCache]: Analyzing trace with hash -283184096, now seen corresponding path program 22 times [2020-10-13 04:42:48,976 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:42:48,976 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1641035637] [2020-10-13 04:42:48,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:42:48,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:48,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:49,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:54,005 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:42:54,006 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-13 04:42:54,006 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:42:54,006 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-13 04:42:54,006 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:42:54,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 04:42:54,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 42 [2020-10-13 04:42:54,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-13 04:42:54,007 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:42:54,115 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:42:54,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:54,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:54,118 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:42:54,119 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:42:54,119 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:42:54,119 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:42:54,119 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:42:54,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:42:54,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:42:54,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:42:54,120 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:42:54,123 INFO L134 CoverageAnalysis]: Checked inductivity of 314 backedges. 1 proven. 117 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2020-10-13 04:42:54,123 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1641035637] [2020-10-13 04:42:54,124 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:42:54,124 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-13 04:42:54,124 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148631282] [2020-10-13 04:42:54,124 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-13 04:42:54,124 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:42:54,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-13 04:42:54,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-13 04:42:54,125 INFO L87 Difference]: Start difference. First operand 105 states and 127 transitions. Second operand 13 states. [2020-10-13 04:42:54,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:42:54,242 INFO L93 Difference]: Finished difference Result 184 states and 233 transitions. [2020-10-13 04:42:54,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 04:42:54,243 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 73 [2020-10-13 04:42:54,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:42:54,244 INFO L225 Difference]: With dead ends: 184 [2020-10-13 04:42:54,244 INFO L226 Difference]: Without dead ends: 115 [2020-10-13 04:42:54,245 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-13 04:42:54,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-13 04:42:54,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 111. [2020-10-13 04:42:54,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-10-13 04:42:54,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 135 transitions. [2020-10-13 04:42:54,249 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 135 transitions. Word has length 73 [2020-10-13 04:42:54,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:42:54,250 INFO L479 AbstractCegarLoop]: Abstraction has 111 states and 135 transitions. [2020-10-13 04:42:54,250 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-13 04:42:54,250 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 135 transitions. [2020-10-13 04:42:54,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-13 04:42:54,251 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:42:54,251 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:42:54,251 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-13 04:42:54,251 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:42:54,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:42:54,252 INFO L82 PathProgramCache]: Analyzing trace with hash 1986006439, now seen corresponding path program 23 times [2020-10-13 04:42:54,252 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:42:54,252 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1666834310] [2020-10-13 04:42:54,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:42:54,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:54,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:54,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:59,273 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:42:59,273 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-13 04:42:59,273 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:42:59,273 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-13 04:42:59,273 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:42:59,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 04:42:59,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:42:59,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-13 04:42:59,274 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:42:59,451 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:42:59,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:59,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:59,454 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:42:59,454 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:42:59,454 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:42:59,455 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:42:59,455 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:42:59,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:42:59,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:42:59,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:42:59,455 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:42:59,460 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2020-10-13 04:42:59,461 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1666834310] [2020-10-13 04:42:59,461 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:42:59,461 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-13 04:42:59,461 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25658575] [2020-10-13 04:42:59,462 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-13 04:42:59,462 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:42:59,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-13 04:42:59,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-13 04:42:59,463 INFO L87 Difference]: Start difference. First operand 111 states and 135 transitions. Second operand 18 states. [2020-10-13 04:42:59,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:42:59,557 INFO L93 Difference]: Finished difference Result 190 states and 238 transitions. [2020-10-13 04:42:59,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-13 04:42:59,558 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 76 [2020-10-13 04:42:59,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:42:59,559 INFO L225 Difference]: With dead ends: 190 [2020-10-13 04:42:59,559 INFO L226 Difference]: Without dead ends: 114 [2020-10-13 04:42:59,560 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-13 04:42:59,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-13 04:42:59,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 113. [2020-10-13 04:42:59,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-10-13 04:42:59,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 137 transitions. [2020-10-13 04:42:59,566 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 137 transitions. Word has length 76 [2020-10-13 04:42:59,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:42:59,566 INFO L479 AbstractCegarLoop]: Abstraction has 113 states and 137 transitions. [2020-10-13 04:42:59,566 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-13 04:42:59,567 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 137 transitions. [2020-10-13 04:42:59,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-13 04:42:59,567 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:42:59,567 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:42:59,568 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-13 04:42:59,568 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:42:59,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:42:59,568 INFO L82 PathProgramCache]: Analyzing trace with hash -1774122039, now seen corresponding path program 24 times [2020-10-13 04:42:59,568 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:42:59,568 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1256086088] [2020-10-13 04:42:59,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:42:59,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:59,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:59,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:43:04,595 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:43:04,595 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-13 04:43:04,596 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:43:04,596 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-13 04:43:04,596 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:43:04,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-13 04:43:04,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:43:04,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-13 04:43:04,596 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:43:04,782 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:43:04,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:43:04,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:43:04,784 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:43:04,784 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:43:04,784 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:43:04,784 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:43:04,785 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:43:04,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:43:04,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:43:04,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:43:04,785 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:43:04,790 INFO L134 CoverageAnalysis]: Checked inductivity of 371 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2020-10-13 04:43:04,790 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1256086088] [2020-10-13 04:43:04,790 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:43:04,790 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-13 04:43:04,791 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367553581] [2020-10-13 04:43:04,791 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-13 04:43:04,791 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:43:04,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-13 04:43:04,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-13 04:43:04,792 INFO L87 Difference]: Start difference. First operand 113 states and 137 transitions. Second operand 19 states. [2020-10-13 04:43:04,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:43:04,905 INFO L93 Difference]: Finished difference Result 192 states and 240 transitions. [2020-10-13 04:43:04,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-13 04:43:04,906 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 78 [2020-10-13 04:43:04,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:43:04,907 INFO L225 Difference]: With dead ends: 192 [2020-10-13 04:43:04,907 INFO L226 Difference]: Without dead ends: 116 [2020-10-13 04:43:04,908 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-13 04:43:04,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-13 04:43:04,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 115. [2020-10-13 04:43:04,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-10-13 04:43:04,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 139 transitions. [2020-10-13 04:43:04,914 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 139 transitions. Word has length 78 [2020-10-13 04:43:04,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:43:04,914 INFO L479 AbstractCegarLoop]: Abstraction has 115 states and 139 transitions. [2020-10-13 04:43:04,914 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-13 04:43:04,914 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 139 transitions. [2020-10-13 04:43:04,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-13 04:43:04,915 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:43:04,915 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:43:04,915 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-13 04:43:04,916 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:43:04,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:43:04,916 INFO L82 PathProgramCache]: Analyzing trace with hash 1104873835, now seen corresponding path program 25 times [2020-10-13 04:43:04,916 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:43:04,916 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [573425688] [2020-10-13 04:43:04,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:43:04,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:43:04,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:43:04,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:43:09,938 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:43:09,938 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-13 04:43:09,939 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:43:09,939 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-13 04:43:09,939 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:43:09,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 04:43:09,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 46 [2020-10-13 04:43:09,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-13 04:43:09,940 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:43:10,045 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:43:10,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:43:10,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:43:10,048 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:43:10,048 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:43:10,048 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:43:10,048 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:43:10,048 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:43:10,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:43:10,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:43:10,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:43:10,049 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:43:10,053 INFO L134 CoverageAnalysis]: Checked inductivity of 402 backedges. 1 proven. 145 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2020-10-13 04:43:10,053 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [573425688] [2020-10-13 04:43:10,054 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:43:10,054 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 04:43:10,054 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643350587] [2020-10-13 04:43:10,054 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 04:43:10,054 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:43:10,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 04:43:10,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-13 04:43:10,055 INFO L87 Difference]: Start difference. First operand 115 states and 139 transitions. Second operand 14 states. [2020-10-13 04:43:10,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:43:10,172 INFO L93 Difference]: Finished difference Result 200 states and 253 transitions. [2020-10-13 04:43:10,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 04:43:10,174 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 80 [2020-10-13 04:43:10,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:43:10,175 INFO L225 Difference]: With dead ends: 200 [2020-10-13 04:43:10,176 INFO L226 Difference]: Without dead ends: 125 [2020-10-13 04:43:10,176 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-13 04:43:10,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-13 04:43:10,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 121. [2020-10-13 04:43:10,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-13 04:43:10,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 147 transitions. [2020-10-13 04:43:10,182 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 147 transitions. Word has length 80 [2020-10-13 04:43:10,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:43:10,182 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 147 transitions. [2020-10-13 04:43:10,182 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 04:43:10,182 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 147 transitions. [2020-10-13 04:43:10,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-13 04:43:10,183 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:43:10,183 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:43:10,183 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-13 04:43:10,184 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:43:10,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:43:10,184 INFO L82 PathProgramCache]: Analyzing trace with hash 1674702972, now seen corresponding path program 26 times [2020-10-13 04:43:10,184 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:43:10,184 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [943529748] [2020-10-13 04:43:10,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:43:10,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:43:10,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:43:10,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:43:15,203 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:43:15,203 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-13 04:43:15,203 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:43:15,203 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-13 04:43:15,204 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:43:15,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-13 04:43:15,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:43:15,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-13 04:43:15,204 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:43:15,408 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:43:15,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:43:15,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:43:15,411 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:43:15,411 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:43:15,411 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:43:15,411 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:43:15,412 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:43:15,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:43:15,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:43:15,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:43:15,412 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:43:15,416 INFO L134 CoverageAnalysis]: Checked inductivity of 433 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 177 trivial. 0 not checked. [2020-10-13 04:43:15,417 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [943529748] [2020-10-13 04:43:15,417 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:43:15,417 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-13 04:43:15,417 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173971290] [2020-10-13 04:43:15,418 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-13 04:43:15,418 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:43:15,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-13 04:43:15,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-13 04:43:15,419 INFO L87 Difference]: Start difference. First operand 121 states and 147 transitions. Second operand 20 states. [2020-10-13 04:43:15,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:43:15,588 INFO L93 Difference]: Finished difference Result 206 states and 258 transitions. [2020-10-13 04:43:15,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-13 04:43:15,589 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 83 [2020-10-13 04:43:15,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:43:15,590 INFO L225 Difference]: With dead ends: 206 [2020-10-13 04:43:15,590 INFO L226 Difference]: Without dead ends: 124 [2020-10-13 04:43:15,591 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-13 04:43:15,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-10-13 04:43:15,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 123. [2020-10-13 04:43:15,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-10-13 04:43:15,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 149 transitions. [2020-10-13 04:43:15,600 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 149 transitions. Word has length 83 [2020-10-13 04:43:15,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:43:15,600 INFO L479 AbstractCegarLoop]: Abstraction has 123 states and 149 transitions. [2020-10-13 04:43:15,600 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-13 04:43:15,600 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 149 transitions. [2020-10-13 04:43:15,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-13 04:43:15,601 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:43:15,602 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:43:15,602 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-13 04:43:15,602 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:43:15,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:43:15,602 INFO L82 PathProgramCache]: Analyzing trace with hash -564189158, now seen corresponding path program 27 times [2020-10-13 04:43:15,602 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:43:15,603 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1965979872] [2020-10-13 04:43:15,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:43:15,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:43:15,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:43:15,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:43:20,619 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:43:20,620 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-13 04:43:20,620 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:43:20,620 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-13 04:43:20,620 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:43:20,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-13 04:43:20,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 48 [2020-10-13 04:43:20,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-13 04:43:20,621 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:43:20,743 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:43:20,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:43:20,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:43:20,746 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:43:20,746 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:43:20,746 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:43:20,746 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:43:20,746 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:43:20,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:43:20,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:43:20,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:43:20,747 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:43:20,751 INFO L134 CoverageAnalysis]: Checked inductivity of 466 backedges. 1 proven. 176 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2020-10-13 04:43:20,752 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1965979872] [2020-10-13 04:43:20,752 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:43:20,752 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-13 04:43:20,752 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931696791] [2020-10-13 04:43:20,752 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-13 04:43:20,752 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:43:20,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-13 04:43:20,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-13 04:43:20,753 INFO L87 Difference]: Start difference. First operand 123 states and 149 transitions. Second operand 15 states. [2020-10-13 04:43:20,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:43:20,911 INFO L93 Difference]: Finished difference Result 214 states and 271 transitions. [2020-10-13 04:43:20,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-13 04:43:20,912 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 85 [2020-10-13 04:43:20,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:43:20,913 INFO L225 Difference]: With dead ends: 214 [2020-10-13 04:43:20,913 INFO L226 Difference]: Without dead ends: 133 [2020-10-13 04:43:20,914 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-13 04:43:20,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-10-13 04:43:20,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 129. [2020-10-13 04:43:20,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-10-13 04:43:20,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 157 transitions. [2020-10-13 04:43:20,920 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 157 transitions. Word has length 85 [2020-10-13 04:43:20,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:43:20,921 INFO L479 AbstractCegarLoop]: Abstraction has 129 states and 157 transitions. [2020-10-13 04:43:20,921 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-13 04:43:20,921 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 157 transitions. [2020-10-13 04:43:20,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-10-13 04:43:20,922 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:43:20,922 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:43:20,922 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-13 04:43:20,923 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:43:20,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:43:20,923 INFO L82 PathProgramCache]: Analyzing trace with hash 1455464301, now seen corresponding path program 28 times [2020-10-13 04:43:20,923 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:43:20,924 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [57863258] [2020-10-13 04:43:20,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:43:20,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:43:20,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:43:20,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:43:25,935 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:43:25,935 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-13 04:43:25,936 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:43:25,936 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-13 04:43:25,936 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:43:25,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-13 04:43:25,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:43:25,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-13 04:43:25,936 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:43:26,165 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:43:26,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:43:26,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:43:26,168 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:43:26,168 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:43:26,168 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:43:26,169 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:43:26,169 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:43:26,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:43:26,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:43:26,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:43:26,170 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:43:26,177 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 211 trivial. 0 not checked. [2020-10-13 04:43:26,177 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [57863258] [2020-10-13 04:43:26,177 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:43:26,178 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-13 04:43:26,178 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171844678] [2020-10-13 04:43:26,178 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-13 04:43:26,178 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:43:26,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-13 04:43:26,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-13 04:43:26,179 INFO L87 Difference]: Start difference. First operand 129 states and 157 transitions. Second operand 21 states. [2020-10-13 04:43:26,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:43:26,327 INFO L93 Difference]: Finished difference Result 220 states and 276 transitions. [2020-10-13 04:43:26,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-13 04:43:26,327 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 88 [2020-10-13 04:43:26,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:43:26,328 INFO L225 Difference]: With dead ends: 220 [2020-10-13 04:43:26,328 INFO L226 Difference]: Without dead ends: 132 [2020-10-13 04:43:26,329 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-13 04:43:26,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-10-13 04:43:26,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 131. [2020-10-13 04:43:26,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-10-13 04:43:26,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 159 transitions. [2020-10-13 04:43:26,334 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 159 transitions. Word has length 88 [2020-10-13 04:43:26,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:43:26,335 INFO L479 AbstractCegarLoop]: Abstraction has 131 states and 159 transitions. [2020-10-13 04:43:26,335 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-13 04:43:26,335 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 159 transitions. [2020-10-13 04:43:26,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-10-13 04:43:26,336 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:43:26,336 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:43:26,337 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-13 04:43:26,337 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:43:26,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:43:26,337 INFO L82 PathProgramCache]: Analyzing trace with hash 1417378447, now seen corresponding path program 29 times [2020-10-13 04:43:26,337 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:43:26,338 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [271472291] [2020-10-13 04:43:26,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:43:26,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:43:26,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:43:26,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:43:31,363 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:43:31,363 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 98 [2020-10-13 04:43:31,363 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:43:31,364 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-13 04:43:31,364 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:43:31,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-13 04:43:31,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:43:31,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-13 04:43:31,364 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:43:31,609 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:43:31,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:43:31,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:43:31,612 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:43:31,612 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:43:31,613 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:43:31,613 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:43:31,613 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:43:31,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:43:31,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:43:31,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:43:31,613 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:43:31,618 INFO L134 CoverageAnalysis]: Checked inductivity of 535 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 211 trivial. 0 not checked. [2020-10-13 04:43:31,619 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [271472291] [2020-10-13 04:43:31,619 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:43:31,619 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-13 04:43:31,619 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098905423] [2020-10-13 04:43:31,619 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-13 04:43:31,619 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:43:31,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-13 04:43:31,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-13 04:43:31,620 INFO L87 Difference]: Start difference. First operand 131 states and 159 transitions. Second operand 22 states. [2020-10-13 04:43:31,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:43:31,779 INFO L93 Difference]: Finished difference Result 222 states and 278 transitions. [2020-10-13 04:43:31,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-13 04:43:31,779 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 90 [2020-10-13 04:43:31,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:43:31,781 INFO L225 Difference]: With dead ends: 222 [2020-10-13 04:43:31,781 INFO L226 Difference]: Without dead ends: 134 [2020-10-13 04:43:31,782 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-13 04:43:31,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-10-13 04:43:31,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 133. [2020-10-13 04:43:31,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-10-13 04:43:31,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 161 transitions. [2020-10-13 04:43:31,788 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 161 transitions. Word has length 90 [2020-10-13 04:43:31,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:43:31,788 INFO L479 AbstractCegarLoop]: Abstraction has 133 states and 161 transitions. [2020-10-13 04:43:31,789 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-13 04:43:31,789 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 161 transitions. [2020-10-13 04:43:31,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-10-13 04:43:31,790 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:43:31,790 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:43:31,790 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-13 04:43:31,790 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:43:31,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:43:31,790 INFO L82 PathProgramCache]: Analyzing trace with hash -823388879, now seen corresponding path program 30 times [2020-10-13 04:43:31,791 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:43:31,791 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [554661877] [2020-10-13 04:43:31,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:43:31,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:43:31,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:43:31,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:43:36,814 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:43:36,815 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-10-13 04:43:36,815 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:43:36,815 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-13 04:43:36,815 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:43:36,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 04:43:36,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 52 [2020-10-13 04:43:36,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-13 04:43:36,816 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:43:36,945 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:43:36,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:43:36,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:43:36,948 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:43:36,948 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:43:36,949 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:43:36,949 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:43:36,949 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:43:36,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:43:36,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:43:36,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:43:36,949 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:43:36,956 INFO L134 CoverageAnalysis]: Checked inductivity of 572 backedges. 1 proven. 210 refuted. 0 times theorem prover too weak. 361 trivial. 0 not checked. [2020-10-13 04:43:36,956 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [554661877] [2020-10-13 04:43:36,956 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:43:36,956 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 04:43:36,956 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792685432] [2020-10-13 04:43:36,957 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 04:43:36,957 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:43:36,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 04:43:36,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-13 04:43:36,958 INFO L87 Difference]: Start difference. First operand 133 states and 161 transitions. Second operand 16 states. [2020-10-13 04:43:37,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:43:37,130 INFO L93 Difference]: Finished difference Result 230 states and 291 transitions. [2020-10-13 04:43:37,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-13 04:43:37,130 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 92 [2020-10-13 04:43:37,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:43:37,132 INFO L225 Difference]: With dead ends: 230 [2020-10-13 04:43:37,132 INFO L226 Difference]: Without dead ends: 143 [2020-10-13 04:43:37,132 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-13 04:43:37,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-10-13 04:43:37,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 139. [2020-10-13 04:43:37,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-13 04:43:37,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 169 transitions. [2020-10-13 04:43:37,138 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 169 transitions. Word has length 92 [2020-10-13 04:43:37,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:43:37,138 INFO L479 AbstractCegarLoop]: Abstraction has 139 states and 169 transitions. [2020-10-13 04:43:37,138 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 04:43:37,138 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 169 transitions. [2020-10-13 04:43:37,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-10-13 04:43:37,139 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:43:37,139 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:43:37,139 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-13 04:43:37,139 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:43:37,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:43:37,140 INFO L82 PathProgramCache]: Analyzing trace with hash 1987774198, now seen corresponding path program 31 times [2020-10-13 04:43:37,140 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:43:37,140 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1125390372] [2020-10-13 04:43:37,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:43:37,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:43:37,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:43:37,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:43:42,155 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:43:42,155 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-10-13 04:43:42,155 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:43:42,155 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 04:43:42,156 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:43:42,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-13 04:43:42,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:43:42,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-13 04:43:42,156 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:43:42,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:43:42,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:43:42,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:43:42,419 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:43:42,419 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:43:42,419 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:43:42,419 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:43:42,419 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:43:42,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:43:42,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:43:42,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:43:42,420 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:43:42,425 INFO L134 CoverageAnalysis]: Checked inductivity of 609 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 248 trivial. 0 not checked. [2020-10-13 04:43:42,426 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1125390372] [2020-10-13 04:43:42,426 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:43:42,426 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-13 04:43:42,426 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737004830] [2020-10-13 04:43:42,426 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-13 04:43:42,427 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:43:42,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-13 04:43:42,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-13 04:43:42,427 INFO L87 Difference]: Start difference. First operand 139 states and 169 transitions. Second operand 23 states. [2020-10-13 04:43:42,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:43:42,590 INFO L93 Difference]: Finished difference Result 236 states and 296 transitions. [2020-10-13 04:43:42,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-13 04:43:42,591 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 95 [2020-10-13 04:43:42,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:43:42,593 INFO L225 Difference]: With dead ends: 236 [2020-10-13 04:43:42,593 INFO L226 Difference]: Without dead ends: 142 [2020-10-13 04:43:42,594 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-13 04:43:42,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-10-13 04:43:42,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 141. [2020-10-13 04:43:42,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-13 04:43:42,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 171 transitions. [2020-10-13 04:43:42,599 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 171 transitions. Word has length 95 [2020-10-13 04:43:42,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:43:42,599 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 171 transitions. [2020-10-13 04:43:42,599 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-13 04:43:42,599 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 171 transitions. [2020-10-13 04:43:42,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-10-13 04:43:42,600 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:43:42,600 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:43:42,600 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-13 04:43:42,601 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:43:42,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:43:42,601 INFO L82 PathProgramCache]: Analyzing trace with hash -523517548, now seen corresponding path program 32 times [2020-10-13 04:43:42,601 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:43:42,601 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1855092405] [2020-10-13 04:43:42,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:43:42,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:43:42,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:43:42,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:43:47,615 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:43:47,616 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 105 [2020-10-13 04:43:47,616 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:43:47,616 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 04:43:47,616 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:43:47,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-13 04:43:47,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 54 [2020-10-13 04:43:47,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-13 04:43:47,616 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:43:47,769 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:43:47,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:43:47,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:43:47,771 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:43:47,772 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:43:47,772 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:43:47,772 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 04:43:47,772 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:43:47,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:43:47,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:43:47,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:43:47,772 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:43:47,779 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 1 proven. 247 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2020-10-13 04:43:47,779 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1855092405] [2020-10-13 04:43:47,779 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:43:47,779 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-13 04:43:47,779 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720070210] [2020-10-13 04:43:47,779 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-13 04:43:47,780 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:43:47,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-13 04:43:47,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-13 04:43:47,780 INFO L87 Difference]: Start difference. First operand 141 states and 171 transitions. Second operand 17 states. [2020-10-13 04:43:47,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:43:47,950 INFO L93 Difference]: Finished difference Result 244 states and 309 transitions. [2020-10-13 04:43:47,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-13 04:43:47,950 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 97 [2020-10-13 04:43:47,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:43:47,952 INFO L225 Difference]: With dead ends: 244 [2020-10-13 04:43:47,953 INFO L226 Difference]: Without dead ends: 151 [2020-10-13 04:43:47,953 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-13 04:43:47,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-10-13 04:43:47,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 147. [2020-10-13 04:43:47,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-10-13 04:43:47,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 179 transitions. [2020-10-13 04:43:47,959 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 179 transitions. Word has length 97 [2020-10-13 04:43:47,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:43:47,959 INFO L479 AbstractCegarLoop]: Abstraction has 147 states and 179 transitions. [2020-10-13 04:43:47,960 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-13 04:43:47,960 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 179 transitions. [2020-10-13 04:43:47,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-10-13 04:43:47,961 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:43:47,961 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:43:47,961 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-13 04:43:47,961 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:43:47,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:43:47,962 INFO L82 PathProgramCache]: Analyzing trace with hash 1922620339, now seen corresponding path program 33 times [2020-10-13 04:43:47,962 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:43:47,962 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1599464980] [2020-10-13 04:43:47,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:43:47,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:43:47,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:43:48,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:43:52,994 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:43:52,994 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 108 [2020-10-13 04:43:52,994 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:43:52,995 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5020 [2020-10-13 04:43:52,995 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:43:52,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-13 04:43:52,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:43:52,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-13 04:43:52,995 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:43:53,282 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:43:53,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:43:53,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:43:53,286 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:43:53,286 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:43:53,286 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:43:53,286 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:43:53,286 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:43:53,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:43:53,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:43:53,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:43:53,287 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:43:53,293 INFO L134 CoverageAnalysis]: Checked inductivity of 688 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2020-10-13 04:43:53,293 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1599464980] [2020-10-13 04:43:53,293 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:43:53,294 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-13 04:43:53,294 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136014668] [2020-10-13 04:43:53,294 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-13 04:43:53,294 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:43:53,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-13 04:43:53,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-13 04:43:53,295 INFO L87 Difference]: Start difference. First operand 147 states and 179 transitions. Second operand 24 states. [2020-10-13 04:43:53,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:43:53,452 INFO L93 Difference]: Finished difference Result 250 states and 314 transitions. [2020-10-13 04:43:53,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-13 04:43:53,452 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 100 [2020-10-13 04:43:53,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:43:53,454 INFO L225 Difference]: With dead ends: 250 [2020-10-13 04:43:53,454 INFO L226 Difference]: Without dead ends: 150 [2020-10-13 04:43:53,455 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-13 04:43:53,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-10-13 04:43:53,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 149. [2020-10-13 04:43:53,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-10-13 04:43:53,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 181 transitions. [2020-10-13 04:43:53,469 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 181 transitions. Word has length 100 [2020-10-13 04:43:53,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:43:53,469 INFO L479 AbstractCegarLoop]: Abstraction has 149 states and 181 transitions. [2020-10-13 04:43:53,469 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-13 04:43:53,469 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 181 transitions. [2020-10-13 04:43:53,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-10-13 04:43:53,471 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:43:53,471 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:43:53,471 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-13 04:43:53,471 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:43:53,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:43:53,472 INFO L82 PathProgramCache]: Analyzing trace with hash 1833571285, now seen corresponding path program 34 times [2020-10-13 04:43:53,472 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:43:53,472 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [848587172] [2020-10-13 04:43:53,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:43:53,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:43:53,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:43:54,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:43:58,523 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:43:58,523 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 110 [2020-10-13 04:43:58,523 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:43:58,524 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5038 [2020-10-13 04:43:58,524 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:43:58,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 04:43:58,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 56 [2020-10-13 04:43:58,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-13 04:43:58,524 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:43:58,703 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:43:58,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:43:58,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:43:58,706 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:43:58,706 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:43:58,706 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:43:58,706 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:43:58,706 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:43:58,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:43:58,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:43:58,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:43:58,707 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:43:58,713 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 1 proven. 287 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2020-10-13 04:43:58,713 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [848587172] [2020-10-13 04:43:58,714 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:43:58,714 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-13 04:43:58,714 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928546079] [2020-10-13 04:43:58,714 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-13 04:43:58,714 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:43:58,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-13 04:43:58,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-13 04:43:58,715 INFO L87 Difference]: Start difference. First operand 149 states and 181 transitions. Second operand 18 states. [2020-10-13 04:43:58,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:43:58,897 INFO L93 Difference]: Finished difference Result 258 states and 327 transitions. [2020-10-13 04:43:58,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-13 04:43:58,898 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 102 [2020-10-13 04:43:58,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:43:58,900 INFO L225 Difference]: With dead ends: 258 [2020-10-13 04:43:58,900 INFO L226 Difference]: Without dead ends: 159 [2020-10-13 04:43:58,900 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-13 04:43:58,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-10-13 04:43:58,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 155. [2020-10-13 04:43:58,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-10-13 04:43:58,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 189 transitions. [2020-10-13 04:43:58,910 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 189 transitions. Word has length 102 [2020-10-13 04:43:58,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:43:58,911 INFO L479 AbstractCegarLoop]: Abstraction has 155 states and 189 transitions. [2020-10-13 04:43:58,911 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-13 04:43:58,911 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 189 transitions. [2020-10-13 04:43:58,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-10-13 04:43:58,911 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:43:58,912 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:43:58,912 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-13 04:43:58,912 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:43:58,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:43:58,912 INFO L82 PathProgramCache]: Analyzing trace with hash -759245358, now seen corresponding path program 35 times [2020-10-13 04:43:58,912 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:43:58,912 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [768111012] [2020-10-13 04:43:58,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:43:58,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:43:58,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:43:59,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:44:03,926 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:44:03,926 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 113 [2020-10-13 04:44:03,926 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:44:03,926 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 04:44:03,926 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:44:03,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-13 04:44:03,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:44:03,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-13 04:44:03,927 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:44:04,239 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:44:04,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:44:04,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:44:04,242 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:44:04,242 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:44:04,242 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:44:04,242 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:44:04,243 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:44:04,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:44:04,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:44:04,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:44:04,243 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:44:04,250 INFO L134 CoverageAnalysis]: Checked inductivity of 772 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 331 trivial. 0 not checked. [2020-10-13 04:44:04,250 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [768111012] [2020-10-13 04:44:04,250 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:44:04,250 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-13 04:44:04,250 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077684058] [2020-10-13 04:44:04,251 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-13 04:44:04,251 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:44:04,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-13 04:44:04,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-13 04:44:04,251 INFO L87 Difference]: Start difference. First operand 155 states and 189 transitions. Second operand 25 states. [2020-10-13 04:44:04,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:44:04,390 INFO L93 Difference]: Finished difference Result 264 states and 332 transitions. [2020-10-13 04:44:04,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-13 04:44:04,391 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 105 [2020-10-13 04:44:04,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:44:04,393 INFO L225 Difference]: With dead ends: 264 [2020-10-13 04:44:04,393 INFO L226 Difference]: Without dead ends: 158 [2020-10-13 04:44:04,394 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-13 04:44:04,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2020-10-13 04:44:04,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 157. [2020-10-13 04:44:04,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-10-13 04:44:04,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 191 transitions. [2020-10-13 04:44:04,402 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 191 transitions. Word has length 105 [2020-10-13 04:44:04,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:44:04,402 INFO L479 AbstractCegarLoop]: Abstraction has 157 states and 191 transitions. [2020-10-13 04:44:04,402 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-13 04:44:04,403 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 191 transitions. [2020-10-13 04:44:04,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-10-13 04:44:04,404 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:44:04,404 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:44:04,404 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-13 04:44:04,404 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:44:04,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:44:04,405 INFO L82 PathProgramCache]: Analyzing trace with hash -1474993424, now seen corresponding path program 36 times [2020-10-13 04:44:04,405 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:44:04,405 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1544369686] [2020-10-13 04:44:04,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:44:04,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:44:04,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:44:05,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:44:09,443 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:44:09,443 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 115 [2020-10-13 04:44:09,443 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:44:09,443 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5020 [2020-10-13 04:44:09,444 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:44:09,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-13 04:44:09,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:44:09,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-13 04:44:09,444 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:44:09,776 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:44:09,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:44:09,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:44:09,779 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:44:09,779 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:44:09,779 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:44:09,779 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:44:09,779 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:44:09,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:44:09,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:44:09,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:44:09,780 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:44:09,787 INFO L134 CoverageAnalysis]: Checked inductivity of 815 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 331 trivial. 0 not checked. [2020-10-13 04:44:09,787 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1544369686] [2020-10-13 04:44:09,787 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:44:09,787 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-13 04:44:09,787 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250845067] [2020-10-13 04:44:09,788 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-13 04:44:09,788 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:44:09,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-13 04:44:09,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-13 04:44:09,789 INFO L87 Difference]: Start difference. First operand 157 states and 191 transitions. Second operand 26 states. [2020-10-13 04:44:09,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:44:09,936 INFO L93 Difference]: Finished difference Result 266 states and 334 transitions. [2020-10-13 04:44:09,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-13 04:44:09,937 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 107 [2020-10-13 04:44:09,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:44:09,938 INFO L225 Difference]: With dead ends: 266 [2020-10-13 04:44:09,938 INFO L226 Difference]: Without dead ends: 160 [2020-10-13 04:44:09,939 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-13 04:44:09,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-10-13 04:44:09,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 159. [2020-10-13 04:44:09,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-10-13 04:44:09,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 193 transitions. [2020-10-13 04:44:09,945 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 193 transitions. Word has length 107 [2020-10-13 04:44:09,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:44:09,945 INFO L479 AbstractCegarLoop]: Abstraction has 159 states and 193 transitions. [2020-10-13 04:44:09,945 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-13 04:44:09,946 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 193 transitions. [2020-10-13 04:44:09,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-10-13 04:44:09,946 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:44:09,946 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:44:09,947 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-13 04:44:09,947 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:44:09,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:44:09,947 INFO L82 PathProgramCache]: Analyzing trace with hash -2114117490, now seen corresponding path program 37 times [2020-10-13 04:44:09,947 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:44:09,947 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1802482916] [2020-10-13 04:44:09,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:44:09,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:44:09,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:44:11,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:44:14,974 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:44:14,974 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-13 04:44:14,974 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:44:14,975 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-13 04:44:14,975 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:44:14,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-13 04:44:14,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 60 [2020-10-13 04:44:14,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-13 04:44:14,975 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:44:15,161 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:44:15,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:44:15,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:44:15,164 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:44:15,164 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:44:15,164 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:44:15,165 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:44:15,165 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:44:15,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:44:15,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:44:15,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:44:15,165 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:44:15,172 INFO L134 CoverageAnalysis]: Checked inductivity of 860 backedges. 1 proven. 330 refuted. 0 times theorem prover too weak. 529 trivial. 0 not checked. [2020-10-13 04:44:15,173 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1802482916] [2020-10-13 04:44:15,173 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:44:15,173 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-13 04:44:15,173 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520847057] [2020-10-13 04:44:15,173 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-13 04:44:15,173 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:44:15,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-13 04:44:15,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-13 04:44:15,174 INFO L87 Difference]: Start difference. First operand 159 states and 193 transitions. Second operand 19 states. [2020-10-13 04:44:15,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:44:15,361 INFO L93 Difference]: Finished difference Result 274 states and 347 transitions. [2020-10-13 04:44:15,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-13 04:44:15,361 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 109 [2020-10-13 04:44:15,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:44:15,362 INFO L225 Difference]: With dead ends: 274 [2020-10-13 04:44:15,363 INFO L226 Difference]: Without dead ends: 169 [2020-10-13 04:44:15,363 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-13 04:44:15,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2020-10-13 04:44:15,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 165. [2020-10-13 04:44:15,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-10-13 04:44:15,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 201 transitions. [2020-10-13 04:44:15,370 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 201 transitions. Word has length 109 [2020-10-13 04:44:15,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:44:15,371 INFO L479 AbstractCegarLoop]: Abstraction has 165 states and 201 transitions. [2020-10-13 04:44:15,371 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-13 04:44:15,371 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 201 transitions. [2020-10-13 04:44:15,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-10-13 04:44:15,372 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:44:15,372 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:44:15,372 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-13 04:44:15,372 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:44:15,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:44:15,373 INFO L82 PathProgramCache]: Analyzing trace with hash -1561042311, now seen corresponding path program 38 times [2020-10-13 04:44:15,373 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:44:15,373 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1953385549] [2020-10-13 04:44:15,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:44:15,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:44:15,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:44:16,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:44:20,426 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:44:20,426 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 120 [2020-10-13 04:44:20,426 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:44:20,426 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5040 [2020-10-13 04:44:20,427 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:44:20,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-13 04:44:20,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:44:20,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-13 04:44:20,427 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:44:20,792 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:44:20,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:44:20,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:44:20,795 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:44:20,795 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:44:20,796 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:44:20,796 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:44:20,796 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:44:20,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:44:20,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:44:20,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:44:20,797 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:44:20,805 INFO L134 CoverageAnalysis]: Checked inductivity of 906 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 377 trivial. 0 not checked. [2020-10-13 04:44:20,805 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1953385549] [2020-10-13 04:44:20,806 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:44:20,806 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-13 04:44:20,806 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213040063] [2020-10-13 04:44:20,806 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-13 04:44:20,806 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:44:20,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-13 04:44:20,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-13 04:44:20,807 INFO L87 Difference]: Start difference. First operand 165 states and 201 transitions. Second operand 27 states. [2020-10-13 04:44:21,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:44:21,012 INFO L93 Difference]: Finished difference Result 280 states and 352 transitions. [2020-10-13 04:44:21,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-13 04:44:21,013 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 112 [2020-10-13 04:44:21,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:44:21,014 INFO L225 Difference]: With dead ends: 280 [2020-10-13 04:44:21,014 INFO L226 Difference]: Without dead ends: 168 [2020-10-13 04:44:21,015 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-13 04:44:21,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2020-10-13 04:44:21,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 167. [2020-10-13 04:44:21,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-10-13 04:44:21,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 203 transitions. [2020-10-13 04:44:21,022 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 203 transitions. Word has length 112 [2020-10-13 04:44:21,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:44:21,022 INFO L479 AbstractCegarLoop]: Abstraction has 167 states and 203 transitions. [2020-10-13 04:44:21,022 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-13 04:44:21,022 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 203 transitions. [2020-10-13 04:44:21,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-10-13 04:44:21,023 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:44:21,023 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:44:21,023 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-13 04:44:21,024 INFO L427 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:44:21,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:44:21,024 INFO L82 PathProgramCache]: Analyzing trace with hash 1928886171, now seen corresponding path program 39 times [2020-10-13 04:44:21,024 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:44:21,024 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [861732866] [2020-10-13 04:44:21,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:44:21,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:44:21,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:44:22,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:44:26,076 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:44:26,076 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 122 [2020-10-13 04:44:26,076 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:44:26,076 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5036 [2020-10-13 04:44:26,076 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:44:26,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-13 04:44:26,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:44:26,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-13 04:44:26,077 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:44:26,552 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:44:26,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:44:26,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:44:26,554 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:44:26,555 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:44:26,555 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:44:26,555 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:44:26,555 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:44:26,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:44:26,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:44:26,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:44:26,556 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:44:26,567 INFO L134 CoverageAnalysis]: Checked inductivity of 953 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 377 trivial. 0 not checked. [2020-10-13 04:44:26,568 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [861732866] [2020-10-13 04:44:26,568 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:44:26,568 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-13 04:44:26,568 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273030662] [2020-10-13 04:44:26,569 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-13 04:44:26,569 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:44:26,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-13 04:44:26,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-13 04:44:26,570 INFO L87 Difference]: Start difference. First operand 167 states and 203 transitions. Second operand 28 states. [2020-10-13 04:44:26,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:44:26,689 INFO L93 Difference]: Finished difference Result 282 states and 354 transitions. [2020-10-13 04:44:26,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-13 04:44:26,689 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 114 [2020-10-13 04:44:26,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:44:26,691 INFO L225 Difference]: With dead ends: 282 [2020-10-13 04:44:26,691 INFO L226 Difference]: Without dead ends: 170 [2020-10-13 04:44:26,692 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-13 04:44:26,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-10-13 04:44:26,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 169. [2020-10-13 04:44:26,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-10-13 04:44:26,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 205 transitions. [2020-10-13 04:44:26,699 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 205 transitions. Word has length 114 [2020-10-13 04:44:26,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:44:26,700 INFO L479 AbstractCegarLoop]: Abstraction has 169 states and 205 transitions. [2020-10-13 04:44:26,700 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-13 04:44:26,700 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 205 transitions. [2020-10-13 04:44:26,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-10-13 04:44:26,701 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:44:26,701 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:44:26,701 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-13 04:44:26,701 INFO L427 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:44:26,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:44:26,702 INFO L82 PathProgramCache]: Analyzing trace with hash 1380699197, now seen corresponding path program 40 times [2020-10-13 04:44:26,702 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:44:26,702 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [745602773] [2020-10-13 04:44:26,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:44:26,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:44:26,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:44:28,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:44:31,730 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:44:31,730 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 124 [2020-10-13 04:44:31,730 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:44:31,731 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-13 04:44:31,731 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:44:31,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-13 04:44:31,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 64 [2020-10-13 04:44:31,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-13 04:44:31,731 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:44:31,963 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:44:31,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:44:31,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:44:31,965 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:44:31,965 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:44:31,965 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:44:31,966 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:44:31,966 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:44:31,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:44:31,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:44:31,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:44:31,966 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:44:31,979 INFO L134 CoverageAnalysis]: Checked inductivity of 1002 backedges. 1 proven. 376 refuted. 0 times theorem prover too weak. 625 trivial. 0 not checked. [2020-10-13 04:44:31,980 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [745602773] [2020-10-13 04:44:31,980 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:44:31,980 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-13 04:44:31,981 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573273260] [2020-10-13 04:44:31,981 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-13 04:44:31,981 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:44:31,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-13 04:44:31,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-13 04:44:31,982 INFO L87 Difference]: Start difference. First operand 169 states and 205 transitions. Second operand 20 states. [2020-10-13 04:44:32,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:44:32,141 INFO L93 Difference]: Finished difference Result 290 states and 367 transitions. [2020-10-13 04:44:32,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-13 04:44:32,141 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 116 [2020-10-13 04:44:32,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:44:32,143 INFO L225 Difference]: With dead ends: 290 [2020-10-13 04:44:32,143 INFO L226 Difference]: Without dead ends: 179 [2020-10-13 04:44:32,143 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-13 04:44:32,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2020-10-13 04:44:32,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 175. [2020-10-13 04:44:32,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2020-10-13 04:44:32,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 213 transitions. [2020-10-13 04:44:32,150 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 213 transitions. Word has length 116 [2020-10-13 04:44:32,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:44:32,150 INFO L479 AbstractCegarLoop]: Abstraction has 175 states and 213 transitions. [2020-10-13 04:44:32,150 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-13 04:44:32,150 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 213 transitions. [2020-10-13 04:44:32,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2020-10-13 04:44:32,151 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:44:32,151 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:44:32,151 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-13 04:44:32,152 INFO L427 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:44:32,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:44:32,152 INFO L82 PathProgramCache]: Analyzing trace with hash -1779342230, now seen corresponding path program 41 times [2020-10-13 04:44:32,152 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:44:32,152 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1268934266] [2020-10-13 04:44:32,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:44:32,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:44:32,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:44:34,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:44:37,173 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:44:37,173 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 127 [2020-10-13 04:44:37,174 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:44:37,174 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 04:44:37,174 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:44:37,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-13 04:44:37,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:44:37,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-13 04:44:37,174 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:44:37,592 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:44:37,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:44:37,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:44:37,594 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:44:37,595 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:44:37,595 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:44:37,595 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:44:37,595 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:44:37,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:44:37,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:44:37,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:44:37,596 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:44:37,608 INFO L134 CoverageAnalysis]: Checked inductivity of 1051 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 426 trivial. 0 not checked. [2020-10-13 04:44:37,609 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1268934266] [2020-10-13 04:44:37,609 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:44:37,609 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-13 04:44:37,609 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716092870] [2020-10-13 04:44:37,610 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-13 04:44:37,610 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:44:37,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-13 04:44:37,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-13 04:44:37,611 INFO L87 Difference]: Start difference. First operand 175 states and 213 transitions. Second operand 29 states. [2020-10-13 04:44:37,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:44:37,843 INFO L93 Difference]: Finished difference Result 296 states and 372 transitions. [2020-10-13 04:44:37,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-13 04:44:37,844 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 119 [2020-10-13 04:44:37,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:44:37,845 INFO L225 Difference]: With dead ends: 296 [2020-10-13 04:44:37,845 INFO L226 Difference]: Without dead ends: 178 [2020-10-13 04:44:37,846 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-13 04:44:37,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-10-13 04:44:37,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 177. [2020-10-13 04:44:37,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2020-10-13 04:44:37,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 215 transitions. [2020-10-13 04:44:37,853 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 215 transitions. Word has length 119 [2020-10-13 04:44:37,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:44:37,853 INFO L479 AbstractCegarLoop]: Abstraction has 177 states and 215 transitions. [2020-10-13 04:44:37,853 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-13 04:44:37,854 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 215 transitions. [2020-10-13 04:44:37,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-10-13 04:44:37,855 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:44:37,855 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:44:37,855 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-13 04:44:37,855 INFO L427 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:44:37,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:44:37,856 INFO L82 PathProgramCache]: Analyzing trace with hash -1107057400, now seen corresponding path program 42 times [2020-10-13 04:44:37,856 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:44:37,856 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [870827651] [2020-10-13 04:44:37,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:44:37,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:44:37,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:44:37,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:44:42,911 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:44:42,912 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 129 [2020-10-13 04:44:42,912 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:44:42,912 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5034 [2020-10-13 04:44:42,912 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:44:42,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-13 04:44:42,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 66 [2020-10-13 04:44:42,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-13 04:44:42,913 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:44:43,128 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:44:43,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:44:43,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:44:43,130 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:44:43,130 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:44:43,130 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:44:43,130 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:44:43,130 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:44:43,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:44:43,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:44:43,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:44:43,131 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:44:43,139 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 1 proven. 425 refuted. 0 times theorem prover too weak. 676 trivial. 0 not checked. [2020-10-13 04:44:43,140 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [870827651] [2020-10-13 04:44:43,140 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:44:43,140 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-13 04:44:43,140 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651349975] [2020-10-13 04:44:43,141 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-13 04:44:43,141 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:44:43,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-13 04:44:43,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-13 04:44:43,141 INFO L87 Difference]: Start difference. First operand 177 states and 215 transitions. Second operand 21 states. [2020-10-13 04:44:43,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:44:43,339 INFO L93 Difference]: Finished difference Result 304 states and 385 transitions. [2020-10-13 04:44:43,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-13 04:44:43,341 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 121 [2020-10-13 04:44:43,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:44:43,342 INFO L225 Difference]: With dead ends: 304 [2020-10-13 04:44:43,342 INFO L226 Difference]: Without dead ends: 187 [2020-10-13 04:44:43,344 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-13 04:44:43,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-10-13 04:44:43,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 183. [2020-10-13 04:44:43,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2020-10-13 04:44:43,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 223 transitions. [2020-10-13 04:44:43,352 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 223 transitions. Word has length 121 [2020-10-13 04:44:43,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:44:43,352 INFO L479 AbstractCegarLoop]: Abstraction has 183 states and 223 transitions. [2020-10-13 04:44:43,352 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-13 04:44:43,352 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 223 transitions. [2020-10-13 04:44:43,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-10-13 04:44:43,353 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:44:43,353 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:44:43,354 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-13 04:44:43,354 INFO L427 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:44:43,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:44:43,354 INFO L82 PathProgramCache]: Analyzing trace with hash -580463681, now seen corresponding path program 43 times [2020-10-13 04:44:43,354 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:44:43,354 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1437153541] [2020-10-13 04:44:43,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:44:43,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:44:43,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:44:44,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:44:48,386 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:44:48,387 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 132 [2020-10-13 04:44:48,387 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:44:48,387 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-13 04:44:48,387 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:44:48,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-13 04:44:48,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:44:48,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-13 04:44:48,387 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:44:48,855 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:44:48,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:44:48,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:44:48,857 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:44:48,858 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:44:48,858 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:44:48,858 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:44:48,858 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:44:48,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:44:48,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:44:48,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:44:48,859 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:44:48,873 INFO L134 CoverageAnalysis]: Checked inductivity of 1154 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 478 trivial. 0 not checked. [2020-10-13 04:44:48,874 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1437153541] [2020-10-13 04:44:48,874 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:44:48,874 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-13 04:44:48,874 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102993189] [2020-10-13 04:44:48,875 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-13 04:44:48,875 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:44:48,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-13 04:44:48,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-13 04:44:48,876 INFO L87 Difference]: Start difference. First operand 183 states and 223 transitions. Second operand 30 states. [2020-10-13 04:44:49,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:44:49,075 INFO L93 Difference]: Finished difference Result 310 states and 390 transitions. [2020-10-13 04:44:49,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-13 04:44:49,075 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 124 [2020-10-13 04:44:49,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:44:49,077 INFO L225 Difference]: With dead ends: 310 [2020-10-13 04:44:49,078 INFO L226 Difference]: Without dead ends: 186 [2020-10-13 04:44:49,079 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-13 04:44:49,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-10-13 04:44:49,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 185. [2020-10-13 04:44:49,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2020-10-13 04:44:49,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 225 transitions. [2020-10-13 04:44:49,086 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 225 transitions. Word has length 124 [2020-10-13 04:44:49,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:44:49,086 INFO L479 AbstractCegarLoop]: Abstraction has 185 states and 225 transitions. [2020-10-13 04:44:49,086 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-13 04:44:49,086 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 225 transitions. [2020-10-13 04:44:49,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-10-13 04:44:49,087 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:44:49,087 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:44:49,087 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-13 04:44:49,088 INFO L427 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:44:49,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:44:49,088 INFO L82 PathProgramCache]: Analyzing trace with hash 878331361, now seen corresponding path program 44 times [2020-10-13 04:44:49,088 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:44:49,088 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [307433984] [2020-10-13 04:44:49,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:44:49,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:44:49,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:44:50,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:44:54,119 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:44:54,119 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 134 [2020-10-13 04:44:54,119 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:44:54,119 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-13 04:44:54,120 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:44:54,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-13 04:44:54,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:44:54,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-13 04:44:54,120 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:44:54,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:44:54,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:44:54,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:44:54,635 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:44:54,635 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:44:54,635 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:44:54,636 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:44:54,636 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:44:54,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:44:54,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:44:54,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:44:54,637 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:44:54,661 INFO L134 CoverageAnalysis]: Checked inductivity of 1207 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 478 trivial. 0 not checked. [2020-10-13 04:44:54,661 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [307433984] [2020-10-13 04:44:54,661 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:44:54,662 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-13 04:44:54,662 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52165387] [2020-10-13 04:44:54,663 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-13 04:44:54,663 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:44:54,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-13 04:44:54,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-13 04:44:54,664 INFO L87 Difference]: Start difference. First operand 185 states and 225 transitions. Second operand 31 states. [2020-10-13 04:44:54,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:44:54,884 INFO L93 Difference]: Finished difference Result 312 states and 392 transitions. [2020-10-13 04:44:54,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-13 04:44:54,885 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 126 [2020-10-13 04:44:54,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:44:54,886 INFO L225 Difference]: With dead ends: 312 [2020-10-13 04:44:54,886 INFO L226 Difference]: Without dead ends: 188 [2020-10-13 04:44:54,887 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-13 04:44:54,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2020-10-13 04:44:54,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 187. [2020-10-13 04:44:54,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2020-10-13 04:44:54,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 227 transitions. [2020-10-13 04:44:54,893 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 227 transitions. Word has length 126 [2020-10-13 04:44:54,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:44:54,893 INFO L479 AbstractCegarLoop]: Abstraction has 187 states and 227 transitions. [2020-10-13 04:44:54,893 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-13 04:44:54,894 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 227 transitions. [2020-10-13 04:44:54,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-10-13 04:44:54,894 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:44:54,894 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:44:54,894 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-13 04:44:54,894 INFO L427 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:44:54,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:44:54,895 INFO L82 PathProgramCache]: Analyzing trace with hash -1673939069, now seen corresponding path program 45 times [2020-10-13 04:44:54,895 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:44:54,895 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [722431967] [2020-10-13 04:44:54,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:44:54,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:44:54,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:44:56,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:44:59,913 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:44:59,914 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 136 [2020-10-13 04:44:59,914 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:44:59,914 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 04:44:59,914 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:44:59,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-13 04:44:59,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 70 [2020-10-13 04:44:59,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-13 04:44:59,914 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:45:00,156 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:45:00,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:45:00,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:45:00,159 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:45:00,159 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:45:00,159 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:45:00,159 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:45:00,160 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:45:00,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:45:00,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:45:00,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:45:00,160 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:45:00,170 INFO L134 CoverageAnalysis]: Checked inductivity of 1262 backedges. 1 proven. 477 refuted. 0 times theorem prover too weak. 784 trivial. 0 not checked. [2020-10-13 04:45:00,170 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [722431967] [2020-10-13 04:45:00,170 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:45:00,170 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-13 04:45:00,170 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788695606] [2020-10-13 04:45:00,171 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-13 04:45:00,171 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:45:00,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-13 04:45:00,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-13 04:45:00,171 INFO L87 Difference]: Start difference. First operand 187 states and 227 transitions. Second operand 22 states. [2020-10-13 04:45:00,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:45:00,317 INFO L93 Difference]: Finished difference Result 320 states and 405 transitions. [2020-10-13 04:45:00,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-13 04:45:00,317 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 128 [2020-10-13 04:45:00,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:45:00,319 INFO L225 Difference]: With dead ends: 320 [2020-10-13 04:45:00,319 INFO L226 Difference]: Without dead ends: 197 [2020-10-13 04:45:00,320 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-13 04:45:00,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2020-10-13 04:45:00,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 193. [2020-10-13 04:45:00,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2020-10-13 04:45:00,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 235 transitions. [2020-10-13 04:45:00,327 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 235 transitions. Word has length 128 [2020-10-13 04:45:00,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:45:00,327 INFO L479 AbstractCegarLoop]: Abstraction has 193 states and 235 transitions. [2020-10-13 04:45:00,327 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-13 04:45:00,327 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 235 transitions. [2020-10-13 04:45:00,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-10-13 04:45:00,328 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:45:00,329 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:45:00,329 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-13 04:45:00,329 INFO L427 AbstractCegarLoop]: === Iteration 50 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:45:00,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:45:00,329 INFO L82 PathProgramCache]: Analyzing trace with hash -740856988, now seen corresponding path program 46 times [2020-10-13 04:45:00,329 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:45:00,330 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [469002265] [2020-10-13 04:45:00,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:45:00,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:45:00,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:45:02,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:45:05,446 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:45:05,447 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 139 [2020-10-13 04:45:05,447 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:45:05,447 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5095 [2020-10-13 04:45:05,447 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:45:05,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-13 04:45:05,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:45:05,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-13 04:45:05,448 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:45:05,941 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:45:05,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:45:05,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:45:05,944 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:45:05,944 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:45:05,945 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:45:05,945 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:45:05,945 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:45:05,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:45:05,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:45:05,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:45:05,946 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:45:05,956 INFO L134 CoverageAnalysis]: Checked inductivity of 1317 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 533 trivial. 0 not checked. [2020-10-13 04:45:05,956 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [469002265] [2020-10-13 04:45:05,957 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:45:05,957 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-13 04:45:05,957 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2148731] [2020-10-13 04:45:05,957 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-13 04:45:05,957 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:45:05,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-13 04:45:05,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-13 04:45:05,958 INFO L87 Difference]: Start difference. First operand 193 states and 235 transitions. Second operand 32 states. [2020-10-13 04:45:06,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:45:06,195 INFO L93 Difference]: Finished difference Result 326 states and 410 transitions. [2020-10-13 04:45:06,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-13 04:45:06,196 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 131 [2020-10-13 04:45:06,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:45:06,198 INFO L225 Difference]: With dead ends: 326 [2020-10-13 04:45:06,198 INFO L226 Difference]: Without dead ends: 196 [2020-10-13 04:45:06,199 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-13 04:45:06,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-10-13 04:45:06,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 195. [2020-10-13 04:45:06,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2020-10-13 04:45:06,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 237 transitions. [2020-10-13 04:45:06,205 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 237 transitions. Word has length 131 [2020-10-13 04:45:06,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:45:06,205 INFO L479 AbstractCegarLoop]: Abstraction has 195 states and 237 transitions. [2020-10-13 04:45:06,206 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-13 04:45:06,206 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 237 transitions. [2020-10-13 04:45:06,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-10-13 04:45:06,207 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:45:06,207 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:45:06,207 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-10-13 04:45:06,207 INFO L427 AbstractCegarLoop]: === Iteration 51 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:45:06,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:45:06,208 INFO L82 PathProgramCache]: Analyzing trace with hash 1734848258, now seen corresponding path program 47 times [2020-10-13 04:45:06,208 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:45:06,208 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [931053149] [2020-10-13 04:45:06,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:45:06,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:45:06,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:45:08,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:45:11,300 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:45:11,301 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 141 [2020-10-13 04:45:11,301 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:45:11,301 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5070 [2020-10-13 04:45:11,301 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:45:11,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-13 04:45:11,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 72 [2020-10-13 04:45:11,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-13 04:45:11,302 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:45:11,568 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:45:11,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:45:11,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:45:11,571 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:45:11,571 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:45:11,571 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:45:11,571 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:45:11,571 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:45:11,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:45:11,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:45:11,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:45:11,572 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:45:11,582 INFO L134 CoverageAnalysis]: Checked inductivity of 1374 backedges. 1 proven. 532 refuted. 0 times theorem prover too weak. 841 trivial. 0 not checked. [2020-10-13 04:45:11,583 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [931053149] [2020-10-13 04:45:11,583 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:45:11,583 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-13 04:45:11,583 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115403893] [2020-10-13 04:45:11,583 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-13 04:45:11,583 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:45:11,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-13 04:45:11,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-13 04:45:11,584 INFO L87 Difference]: Start difference. First operand 195 states and 237 transitions. Second operand 23 states. [2020-10-13 04:45:11,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:45:11,814 INFO L93 Difference]: Finished difference Result 334 states and 423 transitions. [2020-10-13 04:45:11,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-13 04:45:11,815 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 133 [2020-10-13 04:45:11,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:45:11,817 INFO L225 Difference]: With dead ends: 334 [2020-10-13 04:45:11,818 INFO L226 Difference]: Without dead ends: 205 [2020-10-13 04:45:11,818 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-13 04:45:11,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2020-10-13 04:45:11,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 201. [2020-10-13 04:45:11,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 201 states. [2020-10-13 04:45:11,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 245 transitions. [2020-10-13 04:45:11,825 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 245 transitions. Word has length 133 [2020-10-13 04:45:11,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:45:11,825 INFO L479 AbstractCegarLoop]: Abstraction has 201 states and 245 transitions. [2020-10-13 04:45:11,825 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-13 04:45:11,825 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 245 transitions. [2020-10-13 04:45:11,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-10-13 04:45:11,826 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:45:11,826 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:45:11,826 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-10-13 04:45:11,827 INFO L427 AbstractCegarLoop]: === Iteration 52 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:45:11,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:45:11,827 INFO L82 PathProgramCache]: Analyzing trace with hash 235655045, now seen corresponding path program 48 times [2020-10-13 04:45:11,827 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:45:11,827 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1451145567] [2020-10-13 04:45:11,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:45:11,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:45:11,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:45:11,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:45:16,917 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:45:16,917 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 144 [2020-10-13 04:45:16,917 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:45:16,917 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5068 [2020-10-13 04:45:16,917 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:45:16,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-13 04:45:16,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:45:16,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-13 04:45:16,918 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:45:17,453 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:45:17,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:45:17,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:45:17,457 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:45:17,457 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:45:17,457 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:45:17,457 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:45:17,457 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:45:17,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:45:17,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:45:17,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:45:17,458 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:45:17,469 INFO L134 CoverageAnalysis]: Checked inductivity of 1432 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 591 trivial. 0 not checked. [2020-10-13 04:45:17,469 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1451145567] [2020-10-13 04:45:17,470 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:45:17,470 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-13 04:45:17,470 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277761294] [2020-10-13 04:45:17,470 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-13 04:45:17,470 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:45:17,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-13 04:45:17,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-13 04:45:17,471 INFO L87 Difference]: Start difference. First operand 201 states and 245 transitions. Second operand 33 states. [2020-10-13 04:45:17,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:45:17,719 INFO L93 Difference]: Finished difference Result 340 states and 428 transitions. [2020-10-13 04:45:17,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-13 04:45:17,719 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 136 [2020-10-13 04:45:17,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:45:17,721 INFO L225 Difference]: With dead ends: 340 [2020-10-13 04:45:17,722 INFO L226 Difference]: Without dead ends: 204 [2020-10-13 04:45:17,723 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-13 04:45:17,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2020-10-13 04:45:17,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 203. [2020-10-13 04:45:17,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2020-10-13 04:45:17,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 247 transitions. [2020-10-13 04:45:17,729 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 247 transitions. Word has length 136 [2020-10-13 04:45:17,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:45:17,729 INFO L479 AbstractCegarLoop]: Abstraction has 203 states and 247 transitions. [2020-10-13 04:45:17,729 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-13 04:45:17,729 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 247 transitions. [2020-10-13 04:45:17,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-10-13 04:45:17,730 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:45:17,730 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:45:17,731 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-10-13 04:45:17,731 INFO L427 AbstractCegarLoop]: === Iteration 53 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:45:17,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:45:17,731 INFO L82 PathProgramCache]: Analyzing trace with hash -1765073241, now seen corresponding path program 49 times [2020-10-13 04:45:17,731 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:45:17,731 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1215119574] [2020-10-13 04:45:17,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:45:17,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:45:17,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:45:20,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:45:22,809 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:45:22,809 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 146 [2020-10-13 04:45:22,809 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:45:22,809 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5042 [2020-10-13 04:45:22,809 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:45:22,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-13 04:45:22,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:45:22,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-13 04:45:22,810 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:45:23,379 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:45:23,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:45:23,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:45:23,381 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:45:23,382 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:45:23,382 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:45:23,382 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:45:23,382 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:45:23,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:45:23,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:45:23,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:45:23,383 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:45:23,395 INFO L134 CoverageAnalysis]: Checked inductivity of 1491 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 591 trivial. 0 not checked. [2020-10-13 04:45:23,396 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1215119574] [2020-10-13 04:45:23,396 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:45:23,396 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-13 04:45:23,396 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361900710] [2020-10-13 04:45:23,396 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-13 04:45:23,396 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:45:23,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-13 04:45:23,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-13 04:45:23,397 INFO L87 Difference]: Start difference. First operand 203 states and 247 transitions. Second operand 34 states. [2020-10-13 04:45:23,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:45:23,652 INFO L93 Difference]: Finished difference Result 342 states and 430 transitions. [2020-10-13 04:45:23,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-13 04:45:23,653 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 138 [2020-10-13 04:45:23,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:45:23,654 INFO L225 Difference]: With dead ends: 342 [2020-10-13 04:45:23,654 INFO L226 Difference]: Without dead ends: 206 [2020-10-13 04:45:23,655 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-13 04:45:23,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-10-13 04:45:23,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 205. [2020-10-13 04:45:23,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2020-10-13 04:45:23,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 249 transitions. [2020-10-13 04:45:23,661 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 249 transitions. Word has length 138 [2020-10-13 04:45:23,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:45:23,662 INFO L479 AbstractCegarLoop]: Abstraction has 205 states and 249 transitions. [2020-10-13 04:45:23,662 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-13 04:45:23,662 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 249 transitions. [2020-10-13 04:45:23,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2020-10-13 04:45:23,663 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:45:23,663 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:45:23,663 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-10-13 04:45:23,663 INFO L427 AbstractCegarLoop]: === Iteration 54 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:45:23,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:45:23,664 INFO L82 PathProgramCache]: Analyzing trace with hash -319607479, now seen corresponding path program 50 times [2020-10-13 04:45:23,664 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:45:23,664 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [863515844] [2020-10-13 04:45:23,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:45:23,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:45:23,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:45:23,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:45:28,782 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:45:28,782 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 148 [2020-10-13 04:45:28,782 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:45:28,782 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5094 [2020-10-13 04:45:28,782 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:45:28,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-13 04:45:28,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 76 [2020-10-13 04:45:28,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-13 04:45:28,783 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:45:29,077 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:45:29,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:45:29,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:45:29,080 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:45:29,080 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:45:29,080 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:45:29,080 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:45:29,080 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:45:29,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:45:29,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:45:29,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:45:29,081 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:45:29,092 INFO L134 CoverageAnalysis]: Checked inductivity of 1552 backedges. 1 proven. 590 refuted. 0 times theorem prover too weak. 961 trivial. 0 not checked. [2020-10-13 04:45:29,092 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [863515844] [2020-10-13 04:45:29,092 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:45:29,092 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-13 04:45:29,092 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158949968] [2020-10-13 04:45:29,093 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-13 04:45:29,093 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:45:29,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-13 04:45:29,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-13 04:45:29,093 INFO L87 Difference]: Start difference. First operand 205 states and 249 transitions. Second operand 24 states. [2020-10-13 04:45:29,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:45:29,305 INFO L93 Difference]: Finished difference Result 350 states and 443 transitions. [2020-10-13 04:45:29,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-13 04:45:29,306 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 140 [2020-10-13 04:45:29,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:45:29,308 INFO L225 Difference]: With dead ends: 350 [2020-10-13 04:45:29,308 INFO L226 Difference]: Without dead ends: 215 [2020-10-13 04:45:29,309 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-13 04:45:29,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2020-10-13 04:45:29,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 211. [2020-10-13 04:45:29,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211 states. [2020-10-13 04:45:29,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 257 transitions. [2020-10-13 04:45:29,315 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 257 transitions. Word has length 140 [2020-10-13 04:45:29,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:45:29,315 INFO L479 AbstractCegarLoop]: Abstraction has 211 states and 257 transitions. [2020-10-13 04:45:29,316 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-13 04:45:29,316 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 257 transitions. [2020-10-13 04:45:29,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2020-10-13 04:45:29,317 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:45:29,317 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:45:29,317 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-10-13 04:45:29,318 INFO L427 AbstractCegarLoop]: === Iteration 55 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:45:29,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:45:29,318 INFO L82 PathProgramCache]: Analyzing trace with hash -771237922, now seen corresponding path program 51 times [2020-10-13 04:45:29,318 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:45:29,319 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [816474593] [2020-10-13 04:45:29,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:45:29,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:45:29,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:45:32,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:45:34,414 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:45:34,414 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 151 [2020-10-13 04:45:34,414 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:45:34,414 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5068 [2020-10-13 04:45:34,414 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:45:34,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-13 04:45:34,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:45:34,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-13 04:45:34,415 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:45:35,020 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:45:35,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:45:35,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:45:35,023 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:45:35,023 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:45:35,023 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:45:35,024 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:45:35,024 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:45:35,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:45:35,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:45:35,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:45:35,024 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:45:35,036 INFO L134 CoverageAnalysis]: Checked inductivity of 1613 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 652 trivial. 0 not checked. [2020-10-13 04:45:35,036 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [816474593] [2020-10-13 04:45:35,036 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:45:35,036 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-13 04:45:35,036 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104248080] [2020-10-13 04:45:35,036 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-13 04:45:35,037 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:45:35,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-13 04:45:35,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-13 04:45:35,037 INFO L87 Difference]: Start difference. First operand 211 states and 257 transitions. Second operand 35 states. [2020-10-13 04:45:35,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:45:35,300 INFO L93 Difference]: Finished difference Result 356 states and 448 transitions. [2020-10-13 04:45:35,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-13 04:45:35,300 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 143 [2020-10-13 04:45:35,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:45:35,302 INFO L225 Difference]: With dead ends: 356 [2020-10-13 04:45:35,302 INFO L226 Difference]: Without dead ends: 214 [2020-10-13 04:45:35,303 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-13 04:45:35,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2020-10-13 04:45:35,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 213. [2020-10-13 04:45:35,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 213 states. [2020-10-13 04:45:35,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 259 transitions. [2020-10-13 04:45:35,310 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 259 transitions. Word has length 143 [2020-10-13 04:45:35,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:45:35,310 INFO L479 AbstractCegarLoop]: Abstraction has 213 states and 259 transitions. [2020-10-13 04:45:35,310 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-13 04:45:35,310 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 259 transitions. [2020-10-13 04:45:35,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2020-10-13 04:45:35,311 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:45:35,312 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:45:35,312 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2020-10-13 04:45:35,312 INFO L427 AbstractCegarLoop]: === Iteration 56 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:45:35,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:45:35,313 INFO L82 PathProgramCache]: Analyzing trace with hash 220831356, now seen corresponding path program 52 times [2020-10-13 04:45:35,313 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:45:35,313 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1669418690] [2020-10-13 04:45:35,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:45:35,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:45:35,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:45:37,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:45:40,368 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:45:40,369 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 153 [2020-10-13 04:45:40,369 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:45:40,369 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5033 [2020-10-13 04:45:40,369 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:45:40,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-13 04:45:40,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 78 [2020-10-13 04:45:40,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-13 04:45:40,369 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:45:40,683 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:45:40,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:45:40,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:45:40,686 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:45:40,686 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:45:40,686 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:45:40,686 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:45:40,686 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:45:40,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:45:40,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:45:40,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:45:40,686 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:45:40,698 INFO L134 CoverageAnalysis]: Checked inductivity of 1676 backedges. 1 proven. 651 refuted. 0 times theorem prover too weak. 1024 trivial. 0 not checked. [2020-10-13 04:45:40,698 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1669418690] [2020-10-13 04:45:40,698 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:45:40,698 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-13 04:45:40,698 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365032831] [2020-10-13 04:45:40,698 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-13 04:45:40,699 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:45:40,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-13 04:45:40,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-13 04:45:40,699 INFO L87 Difference]: Start difference. First operand 213 states and 259 transitions. Second operand 25 states. [2020-10-13 04:45:40,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:45:40,921 INFO L93 Difference]: Finished difference Result 364 states and 461 transitions. [2020-10-13 04:45:40,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-13 04:45:40,922 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 145 [2020-10-13 04:45:40,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:45:40,924 INFO L225 Difference]: With dead ends: 364 [2020-10-13 04:45:40,924 INFO L226 Difference]: Without dead ends: 223 [2020-10-13 04:45:40,924 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-13 04:45:40,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-10-13 04:45:40,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 219. [2020-10-13 04:45:40,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 219 states. [2020-10-13 04:45:40,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 267 transitions. [2020-10-13 04:45:40,930 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 267 transitions. Word has length 145 [2020-10-13 04:45:40,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:45:40,930 INFO L479 AbstractCegarLoop]: Abstraction has 219 states and 267 transitions. [2020-10-13 04:45:40,930 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-13 04:45:40,930 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 267 transitions. [2020-10-13 04:45:40,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-10-13 04:45:40,931 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:45:40,931 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:45:40,932 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2020-10-13 04:45:40,932 INFO L427 AbstractCegarLoop]: === Iteration 57 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:45:40,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:45:40,932 INFO L82 PathProgramCache]: Analyzing trace with hash 1904670155, now seen corresponding path program 53 times [2020-10-13 04:45:40,932 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:45:40,932 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [636973347] [2020-10-13 04:45:40,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:45:40,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:45:40,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:45:41,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:45:45,955 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:45:45,955 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 156 [2020-10-13 04:45:45,955 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:45:45,956 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-13 04:45:45,956 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:45:45,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-13 04:45:45,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:45:45,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-13 04:45:45,956 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:45:46,600 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:45:46,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:45:46,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:45:46,602 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:45:46,602 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:45:46,603 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:45:46,603 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:45:46,603 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:45:46,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:45:46,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:45:46,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:45:46,603 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:45:46,618 INFO L134 CoverageAnalysis]: Checked inductivity of 1740 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 716 trivial. 0 not checked. [2020-10-13 04:45:46,618 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [636973347] [2020-10-13 04:45:46,618 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:45:46,618 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-13 04:45:46,618 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466810] [2020-10-13 04:45:46,619 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-13 04:45:46,619 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:45:46,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-13 04:45:46,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-13 04:45:46,619 INFO L87 Difference]: Start difference. First operand 219 states and 267 transitions. Second operand 36 states. [2020-10-13 04:45:46,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:45:46,879 INFO L93 Difference]: Finished difference Result 370 states and 466 transitions. [2020-10-13 04:45:46,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-13 04:45:46,880 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 148 [2020-10-13 04:45:46,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:45:46,882 INFO L225 Difference]: With dead ends: 370 [2020-10-13 04:45:46,882 INFO L226 Difference]: Without dead ends: 222 [2020-10-13 04:45:46,883 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-13 04:45:46,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2020-10-13 04:45:46,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 221. [2020-10-13 04:45:46,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 221 states. [2020-10-13 04:45:46,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 269 transitions. [2020-10-13 04:45:46,889 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 269 transitions. Word has length 148 [2020-10-13 04:45:46,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:45:46,889 INFO L479 AbstractCegarLoop]: Abstraction has 221 states and 269 transitions. [2020-10-13 04:45:46,889 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-13 04:45:46,889 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 269 transitions. [2020-10-13 04:45:46,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2020-10-13 04:45:46,890 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:45:46,890 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:45:46,891 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2020-10-13 04:45:46,891 INFO L427 AbstractCegarLoop]: === Iteration 58 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:45:46,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:45:46,891 INFO L82 PathProgramCache]: Analyzing trace with hash -265379347, now seen corresponding path program 54 times [2020-10-13 04:45:46,891 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:45:46,892 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1321935866] [2020-10-13 04:45:46,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:45:46,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:45:46,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:45:50,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:45:52,032 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:45:52,032 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 158 [2020-10-13 04:45:52,032 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:45:52,032 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5116 [2020-10-13 04:45:52,033 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:45:52,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-13 04:45:52,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:45:52,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-13 04:45:52,033 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:45:52,739 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:45:52,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:45:52,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:45:52,742 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:45:52,742 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:45:52,743 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:45:52,743 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:45:52,743 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:45:52,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:45:52,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:45:52,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:45:52,744 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:45:52,760 INFO L134 CoverageAnalysis]: Checked inductivity of 1805 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 716 trivial. 0 not checked. [2020-10-13 04:45:52,761 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1321935866] [2020-10-13 04:45:52,761 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:45:52,761 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-13 04:45:52,761 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567714840] [2020-10-13 04:45:52,762 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-13 04:45:52,762 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:45:52,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-13 04:45:52,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-13 04:45:52,762 INFO L87 Difference]: Start difference. First operand 221 states and 269 transitions. Second operand 37 states. [2020-10-13 04:45:52,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:45:52,986 INFO L93 Difference]: Finished difference Result 372 states and 468 transitions. [2020-10-13 04:45:52,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-13 04:45:52,986 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 150 [2020-10-13 04:45:52,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:45:52,988 INFO L225 Difference]: With dead ends: 372 [2020-10-13 04:45:52,988 INFO L226 Difference]: Without dead ends: 224 [2020-10-13 04:45:52,989 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-13 04:45:52,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2020-10-13 04:45:52,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 223. [2020-10-13 04:45:52,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 223 states. [2020-10-13 04:45:52,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 271 transitions. [2020-10-13 04:45:52,995 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 271 transitions. Word has length 150 [2020-10-13 04:45:52,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:45:52,995 INFO L479 AbstractCegarLoop]: Abstraction has 223 states and 271 transitions. [2020-10-13 04:45:52,995 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-13 04:45:52,995 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 271 transitions. [2020-10-13 04:45:52,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2020-10-13 04:45:52,996 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:45:52,996 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:45:52,997 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2020-10-13 04:45:52,997 INFO L427 AbstractCegarLoop]: === Iteration 59 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:45:52,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:45:52,997 INFO L82 PathProgramCache]: Analyzing trace with hash 1671155087, now seen corresponding path program 55 times [2020-10-13 04:45:52,997 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:45:52,997 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1214172698] [2020-10-13 04:45:52,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:45:53,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:45:53,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:45:53,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:45:58,138 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:45:58,138 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 160 [2020-10-13 04:45:58,138 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:45:58,138 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5116 [2020-10-13 04:45:58,138 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:45:58,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-13 04:45:58,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 82 [2020-10-13 04:45:58,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-13 04:45:58,139 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:45:58,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:45:58,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:45:58,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:45:58,478 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:45:58,478 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:45:58,478 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:45:58,478 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:45:58,478 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:45:58,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:45:58,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:45:58,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:45:58,478 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:45:58,491 INFO L134 CoverageAnalysis]: Checked inductivity of 1872 backedges. 1 proven. 715 refuted. 0 times theorem prover too weak. 1156 trivial. 0 not checked. [2020-10-13 04:45:58,492 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1214172698] [2020-10-13 04:45:58,492 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:45:58,492 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-13 04:45:58,492 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37401660] [2020-10-13 04:45:58,492 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-13 04:45:58,492 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:45:58,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-13 04:45:58,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-13 04:45:58,493 INFO L87 Difference]: Start difference. First operand 223 states and 271 transitions. Second operand 26 states. [2020-10-13 04:45:58,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:45:58,716 INFO L93 Difference]: Finished difference Result 380 states and 481 transitions. [2020-10-13 04:45:58,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-13 04:45:58,716 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 152 [2020-10-13 04:45:58,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:45:58,718 INFO L225 Difference]: With dead ends: 380 [2020-10-13 04:45:58,718 INFO L226 Difference]: Without dead ends: 233 [2020-10-13 04:45:58,719 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-13 04:45:58,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-10-13 04:45:58,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 229. [2020-10-13 04:45:58,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 229 states. [2020-10-13 04:45:58,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 279 transitions. [2020-10-13 04:45:58,725 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 279 transitions. Word has length 152 [2020-10-13 04:45:58,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:45:58,726 INFO L479 AbstractCegarLoop]: Abstraction has 229 states and 279 transitions. [2020-10-13 04:45:58,726 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-13 04:45:58,726 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 279 transitions. [2020-10-13 04:45:58,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2020-10-13 04:45:58,727 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:45:58,727 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:45:58,727 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2020-10-13 04:45:58,727 INFO L427 AbstractCegarLoop]: === Iteration 60 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:45:58,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:45:58,728 INFO L82 PathProgramCache]: Analyzing trace with hash 1127942616, now seen corresponding path program 56 times [2020-10-13 04:45:58,728 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:45:58,728 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1944768657] [2020-10-13 04:45:58,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:45:58,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:45:58,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking...