/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.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=SHALLOWEST --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 language data_model -i ../../../trunk/examples/svcomp/array-examples/standard_two_index_02.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-26 19:33:05,848 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-26 19:33:05,853 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-26 19:33:05,907 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-26 19:33:05,907 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-26 19:33:05,914 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-26 19:33:05,916 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-26 19:33:05,920 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-26 19:33:05,924 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-26 19:33:05,932 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-26 19:33:05,933 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-26 19:33:05,935 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-26 19:33:05,936 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-26 19:33:05,939 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-26 19:33:05,941 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-26 19:33:05,943 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-26 19:33:05,944 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-26 19:33:05,948 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-26 19:33:05,956 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-26 19:33:05,963 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-26 19:33:05,966 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-26 19:33:05,967 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-26 19:33:05,969 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-26 19:33:05,971 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-26 19:33:05,977 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-26 19:33:05,978 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-26 19:33:05,982 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-26 19:33:05,983 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-26 19:33:05,984 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-26 19:33:05,986 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-26 19:33:05,986 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-26 19:33:05,987 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-26 19:33:05,989 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-26 19:33:05,990 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-26 19:33:05,991 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-26 19:33:05,991 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-26 19:33:05,992 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-26 19:33:05,992 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-26 19:33:05,992 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-26 19:33:05,993 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-26 19:33:05,994 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-26 19:33:06,001 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-26 19:33:06,051 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-26 19:33:06,051 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-26 19:33:06,055 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-26 19:33:06,056 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-26 19:33:06,056 INFO L138 SettingsManager]: * Use SBE=true [2020-10-26 19:33:06,056 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-26 19:33:06,056 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-26 19:33:06,057 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-26 19:33:06,057 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-26 19:33:06,057 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-26 19:33:06,058 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-26 19:33:06,058 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-26 19:33:06,059 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-26 19:33:06,059 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-26 19:33:06,059 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-26 19:33:06,059 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-26 19:33:06,059 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-26 19:33:06,060 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-26 19:33:06,060 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-26 19:33:06,060 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-26 19:33:06,060 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-26 19:33:06,060 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 19:33:06,061 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-26 19:33:06,061 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-26 19:33:06,061 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-26 19:33:06,061 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-26 19:33:06,061 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-26 19:33:06,062 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-26 19:33:06,062 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-26 19:33:06,062 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-26 19:33:06,508 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-26 19:33:06,561 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-26 19:33:06,564 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-26 19:33:06,566 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-26 19:33:06,566 INFO L275 PluginConnector]: CDTParser initialized [2020-10-26 19:33:06,567 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_two_index_02.i [2020-10-26 19:33:06,641 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/de05e07bf/199c66e247764618ad03b1a693ae50bb/FLAGaa70f3104 [2020-10-26 19:33:07,368 INFO L306 CDTParser]: Found 1 translation units. [2020-10-26 19:33:07,369 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/standard_two_index_02.i [2020-10-26 19:33:07,376 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/de05e07bf/199c66e247764618ad03b1a693ae50bb/FLAGaa70f3104 [2020-10-26 19:33:07,742 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/de05e07bf/199c66e247764618ad03b1a693ae50bb [2020-10-26 19:33:07,747 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-26 19:33:07,755 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-26 19:33:07,760 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-26 19:33:07,760 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-26 19:33:07,765 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-26 19:33:07,766 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 07:33:07" (1/1) ... [2020-10-26 19:33:07,772 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@b9ad935 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:33:07, skipping insertion in model container [2020-10-26 19:33:07,772 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 07:33:07" (1/1) ... [2020-10-26 19:33:07,781 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-26 19:33:07,801 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-26 19:33:08,010 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 19:33:08,018 INFO L203 MainTranslator]: Completed pre-run [2020-10-26 19:33:08,041 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 19:33:08,058 INFO L208 MainTranslator]: Completed translation [2020-10-26 19:33:08,059 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:33:08 WrapperNode [2020-10-26 19:33:08,059 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-26 19:33:08,061 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-26 19:33:08,063 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-26 19:33:08,063 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-26 19:33:08,077 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:33:08" (1/1) ... [2020-10-26 19:33:08,077 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:33:08" (1/1) ... [2020-10-26 19:33:08,085 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:33:08" (1/1) ... [2020-10-26 19:33:08,086 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:33:08" (1/1) ... [2020-10-26 19:33:08,094 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:33:08" (1/1) ... [2020-10-26 19:33:08,099 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:33:08" (1/1) ... [2020-10-26 19:33:08,101 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:33:08" (1/1) ... [2020-10-26 19:33:08,103 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-26 19:33:08,104 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-26 19:33:08,105 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-26 19:33:08,105 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-26 19:33:08,106 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:33:08" (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 [2020-10-26 19:33:08,177 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-26 19:33:08,178 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-26 19:33:08,178 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-26 19:33:08,178 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-26 19:33:08,178 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-26 19:33:08,178 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-26 19:33:08,179 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-26 19:33:08,179 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-26 19:33:08,179 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-26 19:33:08,179 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-26 19:33:08,179 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-26 19:33:08,179 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-26 19:33:08,180 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-26 19:33:08,180 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-26 19:33:08,180 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-26 19:33:08,180 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-26 19:33:08,180 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-26 19:33:08,181 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-26 19:33:08,181 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-26 19:33:08,181 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-26 19:33:08,475 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-26 19:33:08,476 INFO L298 CfgBuilder]: Removed 3 assume(true) statements. [2020-10-26 19:33:08,478 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 07:33:08 BoogieIcfgContainer [2020-10-26 19:33:08,478 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-26 19:33:08,480 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-26 19:33:08,480 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-26 19:33:08,483 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-26 19:33:08,484 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 07:33:07" (1/3) ... [2020-10-26 19:33:08,484 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65a791da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 07:33:08, skipping insertion in model container [2020-10-26 19:33:08,485 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:33:08" (2/3) ... [2020-10-26 19:33:08,488 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65a791da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 07:33:08, skipping insertion in model container [2020-10-26 19:33:08,488 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 07:33:08" (3/3) ... [2020-10-26 19:33:08,493 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_two_index_02.i [2020-10-26 19:33:08,518 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-26 19:33:08,526 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-26 19:33:08,546 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-26 19:33:08,578 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-26 19:33:08,578 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-26 19:33:08,578 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-26 19:33:08,578 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-26 19:33:08,579 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-26 19:33:08,579 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-26 19:33:08,579 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-26 19:33:08,579 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-26 19:33:08,599 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2020-10-26 19:33:08,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-26 19:33:08,605 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:33:08,606 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:33:08,606 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:33:08,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:33:08,613 INFO L82 PathProgramCache]: Analyzing trace with hash 1774182118, now seen corresponding path program 1 times [2020-10-26 19:33:08,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:33:08,623 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [599030488] [2020-10-26 19:33:08,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:33:08,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:33:08,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:08,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:09,131 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:33:09,131 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-26 19:33:09,132 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:33:09,132 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 341 [2020-10-26 19:33:09,134 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:33:09,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:33:09,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:33:09,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 19:33:09,135 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-26 19:33:09,221 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:33:09,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:33:09,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:09,237 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:33:09,237 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:33:09,237 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:33:09,237 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-26 19:33:09,238 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:33:09,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:33:09,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:33:09,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:33:09,238 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:33:09,249 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:33:09,250 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [599030488] [2020-10-26 19:33:09,252 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 19:33:09,252 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-26 19:33:09,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788550427] [2020-10-26 19:33:09,258 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 19:33:09,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:33:09,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 19:33:09,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 19:33:09,277 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 4 states. [2020-10-26 19:33:09,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:33:09,389 INFO L93 Difference]: Finished difference Result 49 states and 65 transitions. [2020-10-26 19:33:09,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-26 19:33:09,391 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2020-10-26 19:33:09,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:33:09,399 INFO L225 Difference]: With dead ends: 49 [2020-10-26 19:33:09,399 INFO L226 Difference]: Without dead ends: 22 [2020-10-26 19:33:09,403 INFO L677 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 [2020-10-26 19:33:09,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-10-26 19:33:09,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-10-26 19:33:09,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-26 19:33:09,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2020-10-26 19:33:09,447 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 17 [2020-10-26 19:33:09,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:33:09,447 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2020-10-26 19:33:09,447 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 19:33:09,447 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2020-10-26 19:33:09,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-26 19:33:09,448 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:33:09,449 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:33:09,449 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-26 19:33:09,449 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:33:09,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:33:09,450 INFO L82 PathProgramCache]: Analyzing trace with hash -577359468, now seen corresponding path program 1 times [2020-10-26 19:33:09,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:33:09,451 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1819871504] [2020-10-26 19:33:09,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:33:09,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:33:09,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:09,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:09,775 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:33:09,775 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-26 19:33:09,775 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:33:09,776 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 304 [2020-10-26 19:33:09,780 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:33:09,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-26 19:33:09,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:33:09,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-26 19:33:09,781 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:33:09,847 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:33:09,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:33:09,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:09,859 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:33:09,859 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:33:09,860 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:33:09,860 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-26 19:33:09,860 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:33:09,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:33:09,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:33:09,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:33:09,861 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:33:09,867 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:33:09,868 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1819871504] [2020-10-26 19:33:09,868 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:33:09,868 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-26 19:33:09,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788002012] [2020-10-26 19:33:09,870 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-26 19:33:09,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:33:09,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-26 19:33:09,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-26 19:33:09,872 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand 5 states. [2020-10-26 19:33:09,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:33:09,965 INFO L93 Difference]: Finished difference Result 41 states and 47 transitions. [2020-10-26 19:33:09,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 19:33:09,966 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2020-10-26 19:33:09,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:33:09,969 INFO L225 Difference]: With dead ends: 41 [2020-10-26 19:33:09,969 INFO L226 Difference]: Without dead ends: 27 [2020-10-26 19:33:09,970 INFO L677 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 [2020-10-26 19:33:09,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-26 19:33:09,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 24. [2020-10-26 19:33:09,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-26 19:33:09,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2020-10-26 19:33:09,981 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 18 [2020-10-26 19:33:09,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:33:09,982 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2020-10-26 19:33:09,982 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-26 19:33:09,982 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2020-10-26 19:33:09,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-26 19:33:09,983 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:33:09,983 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:33:09,984 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-26 19:33:09,984 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:33:09,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:33:09,985 INFO L82 PathProgramCache]: Analyzing trace with hash -446889165, now seen corresponding path program 1 times [2020-10-26 19:33:09,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:33:09,985 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2082966687] [2020-10-26 19:33:09,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:33:10,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:33:10,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:10,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:10,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:10,737 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:33:10,737 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-26 19:33:10,737 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:33:10,737 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 735 [2020-10-26 19:33:10,738 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:33:10,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 19:33:10,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:33:10,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-26 19:33:10,738 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:33:10,788 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:33:10,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:33:10,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:10,796 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:33:10,796 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:33:10,796 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:33:10,796 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:33:10,797 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:33:10,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:33:10,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:33:10,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:33:10,797 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:33:10,801 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 19:33:10,802 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2082966687] [2020-10-26 19:33:10,802 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:33:10,802 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-26 19:33:10,802 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984037446] [2020-10-26 19:33:10,803 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-26 19:33:10,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:33:10,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-26 19:33:10,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-26 19:33:10,804 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 6 states. [2020-10-26 19:33:10,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:33:10,882 INFO L93 Difference]: Finished difference Result 43 states and 48 transitions. [2020-10-26 19:33:10,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-26 19:33:10,883 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2020-10-26 19:33:10,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:33:10,884 INFO L225 Difference]: With dead ends: 43 [2020-10-26 19:33:10,884 INFO L226 Difference]: Without dead ends: 28 [2020-10-26 19:33:10,885 INFO L677 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 [2020-10-26 19:33:10,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-26 19:33:10,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 25. [2020-10-26 19:33:10,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-26 19:33:10,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2020-10-26 19:33:10,892 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 20 [2020-10-26 19:33:10,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:33:10,893 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2020-10-26 19:33:10,893 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-26 19:33:10,893 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2020-10-26 19:33:10,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-26 19:33:10,894 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:33:10,894 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:33:10,894 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-26 19:33:10,894 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:33:10,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:33:10,895 INFO L82 PathProgramCache]: Analyzing trace with hash 505618241, now seen corresponding path program 2 times [2020-10-26 19:33:10,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:33:10,896 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1696680510] [2020-10-26 19:33:10,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:33:10,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:33:10,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:10,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:10,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:11,587 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:33:11,587 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-26 19:33:11,588 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:33:11,588 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 665 [2020-10-26 19:33:11,588 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:33:11,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 19:33:11,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:33:11,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-26 19:33:11,589 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:33:11,728 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:33:11,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:33:11,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:11,736 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:33:11,736 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:33:11,736 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:33:11,737 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 19:33:11,737 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:33:11,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:33:11,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:33:11,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:33:11,738 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:33:11,742 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-26 19:33:11,743 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1696680510] [2020-10-26 19:33:11,743 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:33:11,743 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-26 19:33:11,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929056623] [2020-10-26 19:33:11,744 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-26 19:33:11,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:33:11,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-26 19:33:11,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-26 19:33:11,746 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 10 states. [2020-10-26 19:33:11,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:33:11,993 INFO L93 Difference]: Finished difference Result 41 states and 45 transitions. [2020-10-26 19:33:11,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 19:33:11,993 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 21 [2020-10-26 19:33:11,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:33:11,995 INFO L225 Difference]: With dead ends: 41 [2020-10-26 19:33:11,995 INFO L226 Difference]: Without dead ends: 37 [2020-10-26 19:33:11,996 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2020-10-26 19:33:11,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-26 19:33:12,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 33. [2020-10-26 19:33:12,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-26 19:33:12,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2020-10-26 19:33:12,004 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 21 [2020-10-26 19:33:12,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:33:12,005 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2020-10-26 19:33:12,005 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-26 19:33:12,005 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2020-10-26 19:33:12,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-26 19:33:12,006 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:33:12,006 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:33:12,006 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-26 19:33:12,006 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:33:12,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:33:12,009 INFO L82 PathProgramCache]: Analyzing trace with hash -1957781260, now seen corresponding path program 3 times [2020-10-26 19:33:12,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:33:12,010 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2134531731] [2020-10-26 19:33:12,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:33:12,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:33:12,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:12,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:12,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:13,211 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:33:13,211 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-26 19:33:13,212 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:33:13,212 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1183 [2020-10-26 19:33:13,212 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:33:13,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-26 19:33:13,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:33:13,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-26 19:33:13,213 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:33:13,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:33:13,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:33:13,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:13,432 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:33:13,432 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:33:13,432 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:33:13,432 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:33:13,433 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:33:13,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:33:13,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:33:13,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:33:13,433 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:33:13,438 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-26 19:33:13,439 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2134531731] [2020-10-26 19:33:13,439 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:33:13,439 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-26 19:33:13,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917339659] [2020-10-26 19:33:13,440 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-26 19:33:13,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:33:13,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-26 19:33:13,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-10-26 19:33:13,441 INFO L87 Difference]: Start difference. First operand 33 states and 36 transitions. Second operand 11 states. [2020-10-26 19:33:13,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:33:13,740 INFO L93 Difference]: Finished difference Result 52 states and 58 transitions. [2020-10-26 19:33:13,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 19:33:13,741 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 22 [2020-10-26 19:33:13,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:33:13,743 INFO L225 Difference]: With dead ends: 52 [2020-10-26 19:33:13,744 INFO L226 Difference]: Without dead ends: 48 [2020-10-26 19:33:13,744 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-10-26 19:33:13,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-26 19:33:13,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 34. [2020-10-26 19:33:13,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-26 19:33:13,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2020-10-26 19:33:13,754 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 22 [2020-10-26 19:33:13,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:33:13,754 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2020-10-26 19:33:13,755 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-26 19:33:13,755 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2020-10-26 19:33:13,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-26 19:33:13,756 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:33:13,756 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:33:13,756 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-26 19:33:13,756 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:33:13,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:33:13,757 INFO L82 PathProgramCache]: Analyzing trace with hash -1013754463, now seen corresponding path program 4 times [2020-10-26 19:33:13,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:33:13,757 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [697952003] [2020-10-26 19:33:13,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:33:13,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:33:13,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:13,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:13,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:14,986 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:33:14,986 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-26 19:33:14,986 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:33:14,986 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1216 [2020-10-26 19:33:14,987 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:33:14,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 19:33:14,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:33:14,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-26 19:33:14,987 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:33:15,035 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:33:15,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:33:15,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:15,042 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:33:15,042 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:33:15,042 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:33:15,042 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:33:15,042 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:33:15,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:33:15,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:33:15,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:33:15,043 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:33:15,047 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-26 19:33:15,047 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [697952003] [2020-10-26 19:33:15,047 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:33:15,048 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 19:33:15,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052605861] [2020-10-26 19:33:15,048 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 19:33:15,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:33:15,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 19:33:15,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-26 19:33:15,049 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand 7 states. [2020-10-26 19:33:15,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:33:15,147 INFO L93 Difference]: Finished difference Result 65 states and 75 transitions. [2020-10-26 19:33:15,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-26 19:33:15,147 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 23 [2020-10-26 19:33:15,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:33:15,149 INFO L225 Difference]: With dead ends: 65 [2020-10-26 19:33:15,149 INFO L226 Difference]: Without dead ends: 41 [2020-10-26 19:33:15,149 INFO L677 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 [2020-10-26 19:33:15,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-26 19:33:15,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 35. [2020-10-26 19:33:15,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-26 19:33:15,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 38 transitions. [2020-10-26 19:33:15,158 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 38 transitions. Word has length 23 [2020-10-26 19:33:15,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:33:15,158 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 38 transitions. [2020-10-26 19:33:15,158 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 19:33:15,159 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 38 transitions. [2020-10-26 19:33:15,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-26 19:33:15,159 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:33:15,160 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:33:15,160 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-26 19:33:15,160 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:33:15,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:33:15,161 INFO L82 PathProgramCache]: Analyzing trace with hash -1714546989, now seen corresponding path program 5 times [2020-10-26 19:33:15,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:33:15,161 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [908364844] [2020-10-26 19:33:15,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:33:15,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:33:15,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:15,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:15,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:16,314 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:33:16,315 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-26 19:33:16,315 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:33:16,315 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1142 [2020-10-26 19:33:16,315 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:33:16,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 19:33:16,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:33:16,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:33:16,316 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:33:16,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:33:16,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:33:16,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:16,377 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:33:16,377 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:33:16,377 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:33:16,377 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:33:16,378 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:33:16,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:33:16,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:33:16,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:33:16,378 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:33:16,382 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-26 19:33:16,382 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [908364844] [2020-10-26 19:33:16,382 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:33:16,383 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-26 19:33:16,383 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638554579] [2020-10-26 19:33:16,384 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 19:33:16,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:33:16,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 19:33:16,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-26 19:33:16,385 INFO L87 Difference]: Start difference. First operand 35 states and 38 transitions. Second operand 8 states. [2020-10-26 19:33:16,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:33:16,512 INFO L93 Difference]: Finished difference Result 66 states and 74 transitions. [2020-10-26 19:33:16,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-26 19:33:16,513 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 24 [2020-10-26 19:33:16,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:33:16,515 INFO L225 Difference]: With dead ends: 66 [2020-10-26 19:33:16,515 INFO L226 Difference]: Without dead ends: 42 [2020-10-26 19:33:16,515 INFO L677 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 [2020-10-26 19:33:16,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-26 19:33:16,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 36. [2020-10-26 19:33:16,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-26 19:33:16,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 39 transitions. [2020-10-26 19:33:16,524 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 39 transitions. Word has length 24 [2020-10-26 19:33:16,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:33:16,525 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 39 transitions. [2020-10-26 19:33:16,525 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 19:33:16,525 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 39 transitions. [2020-10-26 19:33:16,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-26 19:33:16,526 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:33:16,526 INFO L422 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:33:16,527 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-26 19:33:16,527 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:33:16,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:33:16,527 INFO L82 PathProgramCache]: Analyzing trace with hash -1964278815, now seen corresponding path program 6 times [2020-10-26 19:33:16,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:33:16,528 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [546372034] [2020-10-26 19:33:16,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:33:16,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:33:16,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:16,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:16,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:18,232 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:33:18,232 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-26 19:33:18,232 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:33:18,232 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1688 [2020-10-26 19:33:18,232 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:33:18,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-26 19:33:18,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:33:18,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-26 19:33:18,233 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:33:18,320 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:33:18,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:33:18,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:18,326 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:33:18,326 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:33:18,326 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:33:18,326 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:33:18,326 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:33:18,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:33:18,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:33:18,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:33:18,327 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:33:18,330 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-26 19:33:18,330 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [546372034] [2020-10-26 19:33:18,331 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:33:18,331 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-26 19:33:18,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410944059] [2020-10-26 19:33:18,331 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-26 19:33:18,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:33:18,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-26 19:33:18,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-26 19:33:18,333 INFO L87 Difference]: Start difference. First operand 36 states and 39 transitions. Second operand 9 states. [2020-10-26 19:33:18,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:33:18,449 INFO L93 Difference]: Finished difference Result 63 states and 72 transitions. [2020-10-26 19:33:18,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-26 19:33:18,450 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 25 [2020-10-26 19:33:18,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:33:18,451 INFO L225 Difference]: With dead ends: 63 [2020-10-26 19:33:18,451 INFO L226 Difference]: Without dead ends: 39 [2020-10-26 19:33:18,451 INFO L677 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 [2020-10-26 19:33:18,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-26 19:33:18,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 30. [2020-10-26 19:33:18,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-26 19:33:18,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2020-10-26 19:33:18,458 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 25 [2020-10-26 19:33:18,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:33:18,458 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2020-10-26 19:33:18,458 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-26 19:33:18,458 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2020-10-26 19:33:18,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-26 19:33:18,459 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:33:18,459 INFO L422 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:33:18,460 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-26 19:33:18,460 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:33:18,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:33:18,460 INFO L82 PathProgramCache]: Analyzing trace with hash -1116030829, now seen corresponding path program 7 times [2020-10-26 19:33:18,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:33:18,461 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [158866723] [2020-10-26 19:33:18,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:33:18,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:33:18,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:18,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:18,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:20,367 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:33:20,367 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-26 19:33:20,367 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:33:20,367 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1892 [2020-10-26 19:33:20,368 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:33:20,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-26 19:33:20,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:33:20,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-26 19:33:20,368 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:33:20,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:33:20,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:33:20,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:20,570 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:33:20,571 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:33:20,571 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:33:20,571 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 19:33:20,571 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:33:20,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:33:20,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:33:20,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:33:20,572 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:33:20,579 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-10-26 19:33:20,580 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [158866723] [2020-10-26 19:33:20,580 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:33:20,580 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-26 19:33:20,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091149867] [2020-10-26 19:33:20,582 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-26 19:33:20,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:33:20,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-26 19:33:20,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2020-10-26 19:33:20,589 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 12 states. [2020-10-26 19:33:20,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:33:20,906 INFO L93 Difference]: Finished difference Result 41 states and 43 transitions. [2020-10-26 19:33:20,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 19:33:20,907 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 26 [2020-10-26 19:33:20,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:33:20,907 INFO L225 Difference]: With dead ends: 41 [2020-10-26 19:33:20,908 INFO L226 Difference]: Without dead ends: 37 [2020-10-26 19:33:20,908 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2020-10-26 19:33:20,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-26 19:33:20,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2020-10-26 19:33:20,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-26 19:33:20,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2020-10-26 19:33:20,916 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 26 [2020-10-26 19:33:20,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:33:20,917 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2020-10-26 19:33:20,917 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-26 19:33:20,917 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2020-10-26 19:33:20,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-26 19:33:20,920 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:33:20,920 INFO L422 BasicCegarLoop]: trace histogram [6, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:33:20,920 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-26 19:33:20,921 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:33:20,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:33:20,922 INFO L82 PathProgramCache]: Analyzing trace with hash -1785453919, now seen corresponding path program 1 times [2020-10-26 19:33:20,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:33:20,922 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1505079254] [2020-10-26 19:33:20,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:33:20,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:33:20,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:21,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:21,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:23,303 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:33:23,304 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-26 19:33:23,304 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:33:23,304 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2364 [2020-10-26 19:33:23,304 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:33:23,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 19:33:23,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:33:23,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-26 19:33:23,305 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:33:23,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:33:23,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:33:23,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:23,404 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:33:23,404 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:33:23,405 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:33:23,405 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:33:23,405 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:33:23,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:33:23,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:33:23,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:33:23,406 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:33:23,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-26 19:33:23,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:33:23,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:23,412 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:33:23,412 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:33:23,412 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:33:23,413 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:33:23,413 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:33:23,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:33:23,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:33:23,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:33:23,414 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:33:23,416 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-26 19:33:23,417 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1505079254] [2020-10-26 19:33:23,417 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:33:23,418 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-26 19:33:23,418 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273728465] [2020-10-26 19:33:23,418 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-26 19:33:23,418 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:33:23,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-26 19:33:23,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-26 19:33:23,419 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand 10 states. [2020-10-26 19:33:23,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:33:23,600 INFO L93 Difference]: Finished difference Result 67 states and 73 transitions. [2020-10-26 19:33:23,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 19:33:23,600 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 33 [2020-10-26 19:33:23,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:33:23,601 INFO L225 Difference]: With dead ends: 67 [2020-10-26 19:33:23,601 INFO L226 Difference]: Without dead ends: 44 [2020-10-26 19:33:23,602 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-26 19:33:23,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-26 19:33:23,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 37. [2020-10-26 19:33:23,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-26 19:33:23,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2020-10-26 19:33:23,621 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 33 [2020-10-26 19:33:23,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:33:23,624 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2020-10-26 19:33:23,624 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-26 19:33:23,624 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2020-10-26 19:33:23,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-26 19:33:23,627 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:33:23,627 INFO L422 BasicCegarLoop]: trace histogram [7, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:33:23,628 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-26 19:33:23,628 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:33:23,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:33:23,628 INFO L82 PathProgramCache]: Analyzing trace with hash -356741805, now seen corresponding path program 2 times [2020-10-26 19:33:23,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:33:23,629 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [201630650] [2020-10-26 19:33:23,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:33:23,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:33:23,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:23,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:24,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:26,418 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:33:26,419 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-26 19:33:26,419 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:33:26,419 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2768 [2020-10-26 19:33:26,419 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:33:26,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-26 19:33:26,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:33:26,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-26 19:33:26,420 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:33:26,533 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:33:26,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:33:26,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:26,539 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:33:26,539 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:33:26,539 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:33:26,540 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:33:26,540 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:33:26,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:33:26,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:33:26,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:33:26,541 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:33:26,544 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-10-26 19:33:26,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:33:26,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:26,548 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:33:26,549 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:33:26,549 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:33:26,549 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:33:26,550 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:33:26,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:33:26,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:33:26,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:33:26,551 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:33:26,554 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-26 19:33:26,555 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [201630650] [2020-10-26 19:33:26,555 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:33:26,555 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-26 19:33:26,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760800523] [2020-10-26 19:33:26,557 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-26 19:33:26,557 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:33:26,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-26 19:33:26,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-26 19:33:26,558 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand 11 states. [2020-10-26 19:33:26,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:33:26,748 INFO L93 Difference]: Finished difference Result 72 states and 80 transitions. [2020-10-26 19:33:26,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 19:33:26,749 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 34 [2020-10-26 19:33:26,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:33:26,750 INFO L225 Difference]: With dead ends: 72 [2020-10-26 19:33:26,750 INFO L226 Difference]: Without dead ends: 49 [2020-10-26 19:33:26,751 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-26 19:33:26,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-26 19:33:26,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 39. [2020-10-26 19:33:26,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-26 19:33:26,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2020-10-26 19:33:26,766 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 34 [2020-10-26 19:33:26,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:33:26,767 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2020-10-26 19:33:26,767 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-26 19:33:26,767 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2020-10-26 19:33:26,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-26 19:33:26,768 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:33:26,770 INFO L422 BasicCegarLoop]: trace histogram [8, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:33:26,771 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-26 19:33:26,771 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:33:26,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:33:26,771 INFO L82 PathProgramCache]: Analyzing trace with hash 1251267634, now seen corresponding path program 3 times [2020-10-26 19:33:26,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:33:26,772 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1983888232] [2020-10-26 19:33:26,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:33:26,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:33:26,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:26,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:27,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:30,629 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:33:30,630 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-26 19:33:30,630 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:33:30,630 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3839 [2020-10-26 19:33:30,630 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:33:30,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-26 19:33:30,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:33:30,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-26 19:33:30,631 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:33:30,898 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:33:30,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:33:30,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:30,904 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:33:30,905 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:33:30,905 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:33:30,905 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:33:30,905 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:33:30,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:33:30,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:33:30,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:33:30,906 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:33:30,909 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-26 19:33:30,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:33:30,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:30,916 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:33:30,916 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:33:30,916 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:33:30,916 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:33:30,917 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:33:30,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:33:30,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:33:30,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:33:30,917 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:33:30,925 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-26 19:33:30,925 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1983888232] [2020-10-26 19:33:30,925 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:33:30,926 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-26 19:33:30,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688089479] [2020-10-26 19:33:30,926 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-26 19:33:30,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:33:30,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-26 19:33:30,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2020-10-26 19:33:30,927 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand 14 states. [2020-10-26 19:33:31,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:33:31,541 INFO L93 Difference]: Finished difference Result 51 states and 53 transitions. [2020-10-26 19:33:31,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-26 19:33:31,541 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 36 [2020-10-26 19:33:31,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:33:31,543 INFO L225 Difference]: With dead ends: 51 [2020-10-26 19:33:31,543 INFO L226 Difference]: Without dead ends: 47 [2020-10-26 19:33:31,543 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2020-10-26 19:33:31,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-26 19:33:31,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2020-10-26 19:33:31,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-26 19:33:31,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 48 transitions. [2020-10-26 19:33:31,552 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 48 transitions. Word has length 36 [2020-10-26 19:33:31,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:33:31,552 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 48 transitions. [2020-10-26 19:33:31,552 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-26 19:33:31,552 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 48 transitions. [2020-10-26 19:33:31,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-26 19:33:31,553 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:33:31,553 INFO L422 BasicCegarLoop]: trace histogram [8, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:33:31,553 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-26 19:33:31,553 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:33:31,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:33:31,554 INFO L82 PathProgramCache]: Analyzing trace with hash 1003521570, now seen corresponding path program 4 times [2020-10-26 19:33:31,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:33:31,554 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1511208334] [2020-10-26 19:33:31,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:33:31,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:33:31,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:31,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:32,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:35,604 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:33:35,605 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-26 19:33:35,605 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:33:35,605 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4033 [2020-10-26 19:33:35,605 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:33:35,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-26 19:33:35,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:33:35,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-26 19:33:35,606 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:33:35,869 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:33:35,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:33:35,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:35,874 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:33:35,875 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:33:35,875 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:33:35,875 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:33:35,875 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:33:35,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:33:35,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:33:35,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:33:35,876 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:33:35,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-26 19:33:35,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:33:35,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:35,886 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:33:35,887 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:33:35,887 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:33:35,887 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:33:35,887 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:33:35,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:33:35,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:33:35,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:33:35,889 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:33:35,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-10-26 19:33:35,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:33:35,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:35,901 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:33:35,901 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:33:35,901 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:33:35,901 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 19:33:35,902 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:33:35,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:33:35,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:33:35,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:33:35,902 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:33:35,915 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 4 proven. 17 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-10-26 19:33:35,915 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1511208334] [2020-10-26 19:33:35,915 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:33:35,915 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-26 19:33:35,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523002976] [2020-10-26 19:33:35,916 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-26 19:33:35,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:33:35,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-26 19:33:35,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2020-10-26 19:33:35,917 INFO L87 Difference]: Start difference. First operand 46 states and 48 transitions. Second operand 15 states. [2020-10-26 19:33:36,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:33:36,617 INFO L93 Difference]: Finished difference Result 71 states and 78 transitions. [2020-10-26 19:33:36,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-26 19:33:36,618 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 43 [2020-10-26 19:33:36,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:33:36,620 INFO L225 Difference]: With dead ends: 71 [2020-10-26 19:33:36,620 INFO L226 Difference]: Without dead ends: 67 [2020-10-26 19:33:36,621 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2020-10-26 19:33:36,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-26 19:33:36,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 60. [2020-10-26 19:33:36,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-26 19:33:36,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 65 transitions. [2020-10-26 19:33:36,634 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 65 transitions. Word has length 43 [2020-10-26 19:33:36,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:33:36,634 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 65 transitions. [2020-10-26 19:33:36,634 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-26 19:33:36,634 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 65 transitions. [2020-10-26 19:33:36,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-26 19:33:36,636 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:33:36,636 INFO L422 BasicCegarLoop]: trace histogram [8, 5, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:33:36,636 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-26 19:33:36,636 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:33:36,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:33:36,637 INFO L82 PathProgramCache]: Analyzing trace with hash -438304653, now seen corresponding path program 5 times [2020-10-26 19:33:36,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:33:36,637 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1134488560] [2020-10-26 19:33:36,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:33:36,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:33:36,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:36,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:36,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:40,549 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:33:40,550 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-26 19:33:40,550 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:33:40,550 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3888 [2020-10-26 19:33:40,550 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:33:40,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-26 19:33:40,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:33:40,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-26 19:33:40,550 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:33:40,681 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:33:40,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:33:40,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:40,688 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:33:40,689 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:33:40,689 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:33:40,689 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:33:40,689 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:33:40,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:33:40,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:33:40,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:33:40,690 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:33:40,691 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-10-26 19:33:40,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:33:40,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:40,696 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:33:40,696 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:33:40,696 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:33:40,696 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:33:40,697 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:33:40,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:33:40,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:33:40,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:33:40,697 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:33:40,698 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-10-26 19:33:40,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:33:40,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:40,702 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:33:40,702 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:33:40,703 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:33:40,703 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:33:40,703 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:33:40,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:33:40,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:33:40,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:33:40,703 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:33:40,712 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 4 proven. 36 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-10-26 19:33:40,712 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1134488560] [2020-10-26 19:33:40,712 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:33:40,712 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-26 19:33:40,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799829574] [2020-10-26 19:33:40,713 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-26 19:33:40,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:33:40,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-26 19:33:40,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-26 19:33:40,716 INFO L87 Difference]: Start difference. First operand 60 states and 65 transitions. Second operand 12 states. [2020-10-26 19:33:40,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:33:40,937 INFO L93 Difference]: Finished difference Result 113 states and 125 transitions. [2020-10-26 19:33:40,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-26 19:33:40,937 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 44 [2020-10-26 19:33:40,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:33:40,939 INFO L225 Difference]: With dead ends: 113 [2020-10-26 19:33:40,939 INFO L226 Difference]: Without dead ends: 68 [2020-10-26 19:33:40,940 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-26 19:33:40,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-26 19:33:40,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 61. [2020-10-26 19:33:40,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-26 19:33:40,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 66 transitions. [2020-10-26 19:33:40,954 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 66 transitions. Word has length 44 [2020-10-26 19:33:40,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:33:40,954 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 66 transitions. [2020-10-26 19:33:40,954 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-26 19:33:40,954 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 66 transitions. [2020-10-26 19:33:40,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-26 19:33:40,955 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:33:40,955 INFO L422 BasicCegarLoop]: trace histogram [9, 5, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:33:40,955 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-26 19:33:40,956 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:33:40,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:33:40,956 INFO L82 PathProgramCache]: Analyzing trace with hash 800477825, now seen corresponding path program 6 times [2020-10-26 19:33:40,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:33:40,957 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2137990058] [2020-10-26 19:33:40,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:33:40,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:33:40,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:41,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:41,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:45,332 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:33:45,332 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-26 19:33:45,332 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:33:45,332 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4350 [2020-10-26 19:33:45,333 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:33:45,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-26 19:33:45,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:33:45,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-26 19:33:45,333 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:33:45,494 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:33:45,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:33:45,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:45,501 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:33:45,501 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:33:45,501 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:33:45,501 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:33:45,501 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:33:45,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:33:45,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:33:45,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:33:45,502 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:33:45,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-10-26 19:33:45,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:33:45,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:45,506 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:33:45,506 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:33:45,506 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:33:45,507 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:33:45,507 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:33:45,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:33:45,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:33:45,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:33:45,507 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:33:45,508 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-10-26 19:33:45,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:33:45,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:45,511 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:33:45,511 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:33:45,511 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:33:45,511 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:33:45,511 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:33:45,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:33:45,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:33:45,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:33:45,512 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:33:45,516 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 4 proven. 45 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-10-26 19:33:45,516 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2137990058] [2020-10-26 19:33:45,516 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:33:45,517 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-26 19:33:45,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652318367] [2020-10-26 19:33:45,517 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-26 19:33:45,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:33:45,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-26 19:33:45,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-26 19:33:45,518 INFO L87 Difference]: Start difference. First operand 61 states and 66 transitions. Second operand 13 states. [2020-10-26 19:33:45,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:33:45,744 INFO L93 Difference]: Finished difference Result 104 states and 115 transitions. [2020-10-26 19:33:45,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-26 19:33:45,744 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 45 [2020-10-26 19:33:45,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:33:45,745 INFO L225 Difference]: With dead ends: 104 [2020-10-26 19:33:45,745 INFO L226 Difference]: Without dead ends: 59 [2020-10-26 19:33:45,746 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-26 19:33:45,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-26 19:33:45,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 49. [2020-10-26 19:33:45,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-26 19:33:45,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 51 transitions. [2020-10-26 19:33:45,755 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 51 transitions. Word has length 45 [2020-10-26 19:33:45,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:33:45,756 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 51 transitions. [2020-10-26 19:33:45,756 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-26 19:33:45,756 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 51 transitions. [2020-10-26 19:33:45,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-26 19:33:45,757 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:33:45,757 INFO L422 BasicCegarLoop]: trace histogram [10, 5, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:33:45,757 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-26 19:33:45,757 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:33:45,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:33:45,758 INFO L82 PathProgramCache]: Analyzing trace with hash 548028979, now seen corresponding path program 7 times [2020-10-26 19:33:45,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:33:45,758 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [502175938] [2020-10-26 19:33:45,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:33:45,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:33:45,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:45,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:46,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:48,958 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:33:48,958 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-26 19:33:48,959 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:33:48,959 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3186 [2020-10-26 19:33:48,959 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:33:48,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-26 19:33:48,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:33:48,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 19:33:48,959 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:33:49,116 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:33:49,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:33:49,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:49,122 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:33:49,122 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:33:49,122 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:33:49,122 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:33:49,122 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:33:49,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:33:49,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:33:49,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:33:49,123 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:33:49,124 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-10-26 19:33:49,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:33:49,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:49,127 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:33:49,127 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:33:49,127 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:33:49,128 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:33:49,128 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:33:49,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:33:49,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:33:49,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:33:49,128 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:33:49,129 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-10-26 19:33:49,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:33:49,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:49,132 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:33:49,132 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:33:49,132 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:33:49,132 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:33:49,132 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:33:49,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:33:49,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:33:49,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:33:49,133 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:33:49,137 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 4 proven. 55 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-10-26 19:33:49,137 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [502175938] [2020-10-26 19:33:49,137 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:33:49,137 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-26 19:33:49,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887348308] [2020-10-26 19:33:49,138 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-26 19:33:49,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:33:49,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-26 19:33:49,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-26 19:33:49,139 INFO L87 Difference]: Start difference. First operand 49 states and 51 transitions. Second operand 14 states. [2020-10-26 19:33:49,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:33:49,372 INFO L93 Difference]: Finished difference Result 92 states and 99 transitions. [2020-10-26 19:33:49,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-26 19:33:49,372 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 46 [2020-10-26 19:33:49,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:33:49,373 INFO L225 Difference]: With dead ends: 92 [2020-10-26 19:33:49,373 INFO L226 Difference]: Without dead ends: 60 [2020-10-26 19:33:49,374 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-26 19:33:49,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-26 19:33:49,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 50. [2020-10-26 19:33:49,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-26 19:33:49,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 52 transitions. [2020-10-26 19:33:49,387 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 52 transitions. Word has length 46 [2020-10-26 19:33:49,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:33:49,388 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 52 transitions. [2020-10-26 19:33:49,388 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-26 19:33:49,388 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 52 transitions. [2020-10-26 19:33:49,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-26 19:33:49,394 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:33:49,394 INFO L422 BasicCegarLoop]: trace histogram [11, 5, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:33:49,394 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-26 19:33:49,395 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:33:49,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:33:49,395 INFO L82 PathProgramCache]: Analyzing trace with hash 1312049345, now seen corresponding path program 8 times [2020-10-26 19:33:49,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:33:49,395 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1858092251] [2020-10-26 19:33:49,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:33:49,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:33:49,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:49,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:50,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:52,826 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:33:52,826 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-26 19:33:52,826 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:33:52,826 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3411 [2020-10-26 19:33:52,826 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:33:52,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-26 19:33:52,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:33:52,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-26 19:33:52,827 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:33:53,006 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:33:53,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:33:53,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:53,013 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:33:53,013 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:33:53,014 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:33:53,014 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:33:53,014 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:33:53,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:33:53,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:33:53,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:33:53,014 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:33:53,016 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-10-26 19:33:53,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:33:53,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:53,018 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:33:53,018 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:33:53,018 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:33:53,018 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:33:53,019 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:33:53,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:33:53,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:33:53,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:33:53,019 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:33:53,020 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-10-26 19:33:53,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:33:53,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:53,022 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:33:53,022 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:33:53,023 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:33:53,023 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:33:53,023 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:33:53,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:33:53,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:33:53,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:33:53,023 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:33:53,029 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 4 proven. 66 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-10-26 19:33:53,029 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1858092251] [2020-10-26 19:33:53,030 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:33:53,030 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-26 19:33:53,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639783327] [2020-10-26 19:33:53,031 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-26 19:33:53,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:33:53,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-26 19:33:53,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-26 19:33:53,033 INFO L87 Difference]: Start difference. First operand 50 states and 52 transitions. Second operand 15 states. [2020-10-26 19:33:53,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:33:53,306 INFO L93 Difference]: Finished difference Result 97 states and 106 transitions. [2020-10-26 19:33:53,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-26 19:33:53,307 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 47 [2020-10-26 19:33:53,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:33:53,308 INFO L225 Difference]: With dead ends: 97 [2020-10-26 19:33:53,308 INFO L226 Difference]: Without dead ends: 65 [2020-10-26 19:33:53,309 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-26 19:33:53,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-26 19:33:53,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 52. [2020-10-26 19:33:53,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-26 19:33:53,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 54 transitions. [2020-10-26 19:33:53,322 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 54 transitions. Word has length 47 [2020-10-26 19:33:53,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:33:53,322 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 54 transitions. [2020-10-26 19:33:53,323 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-26 19:33:53,323 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 54 transitions. [2020-10-26 19:33:53,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-26 19:33:53,326 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:33:53,327 INFO L422 BasicCegarLoop]: trace histogram [12, 6, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:33:53,327 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-26 19:33:53,327 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:33:53,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:33:53,328 INFO L82 PathProgramCache]: Analyzing trace with hash 320285890, now seen corresponding path program 9 times [2020-10-26 19:33:53,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:33:53,329 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1790904014] [2020-10-26 19:33:53,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:33:53,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:33:53,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:53,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:54,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:57,300 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:33:57,301 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-26 19:33:57,301 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:33:57,301 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3953 [2020-10-26 19:33:57,301 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:33:57,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-26 19:33:57,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:33:57,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-26 19:33:57,301 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:33:57,512 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:33:57,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:33:57,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:57,517 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:33:57,517 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:33:57,518 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:33:57,518 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:33:57,518 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:33:57,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:33:57,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:33:57,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:33:57,518 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:33:57,520 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-26 19:33:57,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:33:57,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:57,522 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:33:57,522 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:33:57,522 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:33:57,523 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:33:57,523 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:33:57,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:33:57,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:33:57,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:33:57,523 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:33:57,524 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-10-26 19:33:57,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:33:57,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:57,526 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:33:57,527 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:33:57,527 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:33:57,527 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:33:57,527 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:33:57,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:33:57,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:33:57,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:33:57,527 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:33:57,532 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 4 proven. 78 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2020-10-26 19:33:57,532 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1790904014] [2020-10-26 19:33:57,532 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:33:57,532 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-26 19:33:57,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185945749] [2020-10-26 19:33:57,535 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-26 19:33:57,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:33:57,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-26 19:33:57,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-26 19:33:57,543 INFO L87 Difference]: Start difference. First operand 52 states and 54 transitions. Second operand 16 states. [2020-10-26 19:33:57,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:33:57,814 INFO L93 Difference]: Finished difference Result 99 states and 107 transitions. [2020-10-26 19:33:57,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-26 19:33:57,814 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 49 [2020-10-26 19:33:57,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:33:57,815 INFO L225 Difference]: With dead ends: 99 [2020-10-26 19:33:57,815 INFO L226 Difference]: Without dead ends: 66 [2020-10-26 19:33:57,816 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-26 19:33:57,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-26 19:33:57,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 53. [2020-10-26 19:33:57,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-26 19:33:57,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 55 transitions. [2020-10-26 19:33:57,827 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 55 transitions. Word has length 49 [2020-10-26 19:33:57,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:33:57,828 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 55 transitions. [2020-10-26 19:33:57,828 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-26 19:33:57,828 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 55 transitions. [2020-10-26 19:33:57,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-26 19:33:57,828 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:33:57,829 INFO L422 BasicCegarLoop]: trace histogram [13, 6, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:33:57,829 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-26 19:33:57,829 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:33:57,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:33:57,830 INFO L82 PathProgramCache]: Analyzing trace with hash -2075659404, now seen corresponding path program 10 times [2020-10-26 19:33:57,830 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:33:57,832 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [503930497] [2020-10-26 19:33:57,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:33:57,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:33:57,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:57,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:59,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:02,131 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:34:02,131 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-26 19:34:02,131 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:34:02,132 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4280 [2020-10-26 19:34:02,132 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:34:02,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-26 19:34:02,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:34:02,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-26 19:34:02,132 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:34:02,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:34:02,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:34:02,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:02,388 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:34:02,388 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:34:02,388 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:34:02,388 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:34:02,389 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:34:02,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:34:02,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:34:02,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:34:02,389 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:34:02,391 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-10-26 19:34:02,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:34:02,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:02,397 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:34:02,400 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:34:02,400 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:34:02,400 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:34:02,401 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:34:02,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:34:02,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:34:02,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:34:02,402 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:34:02,403 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-10-26 19:34:02,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:34:02,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:02,408 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:34:02,409 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:34:02,409 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:34:02,409 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:34:02,409 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:34:02,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:34:02,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:34:02,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:34:02,410 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:34:02,417 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 4 proven. 91 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2020-10-26 19:34:02,417 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [503930497] [2020-10-26 19:34:02,418 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:34:02,418 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-26 19:34:02,418 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564881564] [2020-10-26 19:34:02,421 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-26 19:34:02,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:34:02,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-26 19:34:02,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-26 19:34:02,422 INFO L87 Difference]: Start difference. First operand 53 states and 55 transitions. Second operand 17 states. [2020-10-26 19:34:02,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:34:02,823 INFO L93 Difference]: Finished difference Result 104 states and 114 transitions. [2020-10-26 19:34:02,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-26 19:34:02,824 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 50 [2020-10-26 19:34:02,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:34:02,825 INFO L225 Difference]: With dead ends: 104 [2020-10-26 19:34:02,825 INFO L226 Difference]: Without dead ends: 71 [2020-10-26 19:34:02,825 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-26 19:34:02,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-26 19:34:02,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 55. [2020-10-26 19:34:02,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-26 19:34:02,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 57 transitions. [2020-10-26 19:34:02,839 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 57 transitions. Word has length 50 [2020-10-26 19:34:02,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:34:02,840 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 57 transitions. [2020-10-26 19:34:02,840 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-26 19:34:02,840 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 57 transitions. [2020-10-26 19:34:02,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-26 19:34:02,840 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:34:02,841 INFO L422 BasicCegarLoop]: trace histogram [14, 7, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:34:02,841 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-26 19:34:02,841 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:34:02,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:34:02,841 INFO L82 PathProgramCache]: Analyzing trace with hash -1804591213, now seen corresponding path program 11 times [2020-10-26 19:34:02,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:34:02,842 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [59547987] [2020-10-26 19:34:02,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:34:02,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:34:02,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:02,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:05,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:07,867 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:34:07,867 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-26 19:34:07,867 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:34:07,867 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-26 19:34:07,867 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:34:07,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-26 19:34:07,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:34:07,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-26 19:34:07,868 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:34:08,399 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:34:08,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:34:08,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:08,406 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:34:08,406 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:34:08,406 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:34:08,406 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:34:08,406 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:34:08,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:34:08,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:34:08,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:34:08,408 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:34:08,410 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-10-26 19:34:08,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:34:08,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:08,425 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:34:08,425 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:34:08,425 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:34:08,425 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-26 19:34:08,426 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:34:08,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:34:08,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:34:08,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:34:08,426 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:34:08,428 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-10-26 19:34:08,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:34:08,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:08,437 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:34:08,437 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:34:08,437 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:34:08,437 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:34:08,437 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:34:08,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:34:08,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:34:08,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:34:08,438 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:34:08,459 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 4 proven. 35 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2020-10-26 19:34:08,460 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [59547987] [2020-10-26 19:34:08,460 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:34:08,460 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-26 19:34:08,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795657116] [2020-10-26 19:34:08,461 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-26 19:34:08,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:34:08,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-26 19:34:08,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2020-10-26 19:34:08,463 INFO L87 Difference]: Start difference. First operand 55 states and 57 transitions. Second operand 18 states. [2020-10-26 19:34:09,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:34:09,200 INFO L93 Difference]: Finished difference Result 77 states and 83 transitions. [2020-10-26 19:34:09,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-26 19:34:09,201 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 52 [2020-10-26 19:34:09,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:34:09,202 INFO L225 Difference]: With dead ends: 77 [2020-10-26 19:34:09,202 INFO L226 Difference]: Without dead ends: 73 [2020-10-26 19:34:09,203 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2020-10-26 19:34:09,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-26 19:34:09,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 69. [2020-10-26 19:34:09,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-26 19:34:09,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 74 transitions. [2020-10-26 19:34:09,218 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 74 transitions. Word has length 52 [2020-10-26 19:34:09,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:34:09,223 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 74 transitions. [2020-10-26 19:34:09,223 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-26 19:34:09,223 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 74 transitions. [2020-10-26 19:34:09,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-26 19:34:09,224 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:34:09,224 INFO L422 BasicCegarLoop]: trace histogram [14, 8, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:34:09,224 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-26 19:34:09,225 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:34:09,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:34:09,225 INFO L82 PathProgramCache]: Analyzing trace with hash -1590455006, now seen corresponding path program 12 times [2020-10-26 19:34:09,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:34:09,225 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1163311356] [2020-10-26 19:34:09,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:34:09,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:34:09,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:09,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:12,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:14,257 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:34:14,257 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-26 19:34:14,257 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:34:14,257 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-26 19:34:14,257 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:34:14,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-26 19:34:14,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:34:14,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-26 19:34:14,258 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:34:14,686 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:34:14,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:34:14,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:14,694 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:34:14,694 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:34:14,694 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:34:14,694 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 19:34:14,694 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:34:14,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:34:14,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:34:14,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:34:14,695 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:34:14,697 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-10-26 19:34:14,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:34:14,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:14,702 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:34:14,702 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:34:14,702 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:34:14,702 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:34:14,702 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:34:14,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:34:14,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:34:14,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:34:14,703 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:34:14,704 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-10-26 19:34:14,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:34:14,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:14,713 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:34:14,713 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:34:14,713 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:34:14,713 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:34:14,714 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:34:14,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:34:14,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:34:14,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:34:14,714 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:34:14,728 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 10 proven. 37 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2020-10-26 19:34:14,730 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1163311356] [2020-10-26 19:34:14,730 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:34:14,730 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-26 19:34:14,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571331498] [2020-10-26 19:34:14,732 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-26 19:34:14,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:34:14,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-26 19:34:14,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2020-10-26 19:34:14,733 INFO L87 Difference]: Start difference. First operand 69 states and 74 transitions. Second operand 19 states. [2020-10-26 19:34:15,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:34:15,547 INFO L93 Difference]: Finished difference Result 90 states and 98 transitions. [2020-10-26 19:34:15,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-26 19:34:15,548 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 53 [2020-10-26 19:34:15,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:34:15,549 INFO L225 Difference]: With dead ends: 90 [2020-10-26 19:34:15,549 INFO L226 Difference]: Without dead ends: 86 [2020-10-26 19:34:15,550 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=91, Invalid=559, Unknown=0, NotChecked=0, Total=650 [2020-10-26 19:34:15,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-26 19:34:15,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 62. [2020-10-26 19:34:15,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-26 19:34:15,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 64 transitions. [2020-10-26 19:34:15,561 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 64 transitions. Word has length 53 [2020-10-26 19:34:15,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:34:15,562 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 64 transitions. [2020-10-26 19:34:15,562 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-26 19:34:15,562 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 64 transitions. [2020-10-26 19:34:15,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-26 19:34:15,563 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:34:15,563 INFO L422 BasicCegarLoop]: trace histogram [14, 7, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:34:15,563 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-26 19:34:15,563 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:34:15,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:34:15,564 INFO L82 PathProgramCache]: Analyzing trace with hash -1978868831, now seen corresponding path program 13 times [2020-10-26 19:34:15,564 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:34:15,564 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1145074343] [2020-10-26 19:34:15,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:34:15,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:34:15,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:15,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:17,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:20,585 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:34:20,585 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-26 19:34:20,585 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:34:20,585 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-26 19:34:20,585 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:34:20,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-26 19:34:20,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:34:20,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-26 19:34:20,586 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:34:20,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:34:20,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:34:20,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:20,826 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:34:20,826 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:34:20,826 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:34:20,826 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:34:20,826 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:34:20,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:34:20,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:34:20,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:34:20,826 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:34:20,828 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-10-26 19:34:20,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:34:20,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:20,830 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:34:20,830 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:34:20,830 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:34:20,830 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:34:20,830 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:34:20,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:34:20,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:34:20,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:34:20,830 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:34:20,831 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-10-26 19:34:20,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:34:20,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:20,833 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:34:20,833 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:34:20,833 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:34:20,833 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:34:20,833 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:34:20,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:34:20,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:34:20,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:34:20,833 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:34:20,834 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-10-26 19:34:20,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:34:20,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:20,836 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:34:20,836 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:34:20,836 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:34:20,836 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:34:20,837 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:34:20,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:34:20,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:34:20,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:34:20,837 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:34:20,840 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 6 proven. 105 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2020-10-26 19:34:20,840 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1145074343] [2020-10-26 19:34:20,840 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:34:20,840 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-26 19:34:20,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964899625] [2020-10-26 19:34:20,841 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-26 19:34:20,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:34:20,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-26 19:34:20,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-26 19:34:20,842 INFO L87 Difference]: Start difference. First operand 62 states and 64 transitions. Second operand 18 states. [2020-10-26 19:34:21,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:34:21,176 INFO L93 Difference]: Finished difference Result 117 states and 125 transitions. [2020-10-26 19:34:21,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-26 19:34:21,186 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 59 [2020-10-26 19:34:21,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:34:21,186 INFO L225 Difference]: With dead ends: 117 [2020-10-26 19:34:21,187 INFO L226 Difference]: Without dead ends: 76 [2020-10-26 19:34:21,187 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-26 19:34:21,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-26 19:34:21,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 63. [2020-10-26 19:34:21,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-26 19:34:21,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 65 transitions. [2020-10-26 19:34:21,201 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 65 transitions. Word has length 59 [2020-10-26 19:34:21,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:34:21,202 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 65 transitions. [2020-10-26 19:34:21,202 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-26 19:34:21,202 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 65 transitions. [2020-10-26 19:34:21,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-26 19:34:21,202 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:34:21,203 INFO L422 BasicCegarLoop]: trace histogram [15, 7, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:34:21,203 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-26 19:34:21,203 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:34:21,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:34:21,203 INFO L82 PathProgramCache]: Analyzing trace with hash -1467847725, now seen corresponding path program 14 times [2020-10-26 19:34:21,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:34:21,204 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [800324199] [2020-10-26 19:34:21,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:34:21,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:34:21,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:21,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:23,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:26,225 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:34:26,226 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-26 19:34:26,226 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:34:26,226 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-26 19:34:26,226 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:34:26,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-26 19:34:26,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:34:26,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-26 19:34:26,226 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:34:26,667 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:34:26,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:34:26,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:26,671 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:34:26,671 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:34:26,671 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:34:26,671 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:34:26,671 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:34:26,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:34:26,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:34:26,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:34:26,671 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:34:26,673 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-10-26 19:34:26,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:34:26,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:26,676 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:34:26,676 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:34:26,676 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:34:26,676 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:34:26,677 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:34:26,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:34:26,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:34:26,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:34:26,677 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:34:26,678 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-10-26 19:34:26,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:34:26,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:26,681 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:34:26,681 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:34:26,681 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:34:26,681 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:34:26,681 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:34:26,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:34:26,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:34:26,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:34:26,682 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:34:26,682 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-10-26 19:34:26,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:34:26,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:26,685 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:34:26,685 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:34:26,685 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:34:26,686 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:34:26,686 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:34:26,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:34:26,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:34:26,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:34:26,686 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:34:26,702 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2020-10-26 19:34:26,702 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [800324199] [2020-10-26 19:34:26,702 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:34:26,702 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-26 19:34:26,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513310376] [2020-10-26 19:34:26,703 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-26 19:34:26,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:34:26,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-26 19:34:26,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2020-10-26 19:34:26,704 INFO L87 Difference]: Start difference. First operand 63 states and 65 transitions. Second operand 19 states. [2020-10-26 19:34:27,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:34:27,456 INFO L93 Difference]: Finished difference Result 75 states and 77 transitions. [2020-10-26 19:34:27,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-26 19:34:27,456 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 60 [2020-10-26 19:34:27,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:34:27,457 INFO L225 Difference]: With dead ends: 75 [2020-10-26 19:34:27,458 INFO L226 Difference]: Without dead ends: 71 [2020-10-26 19:34:27,458 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=80, Invalid=622, Unknown=0, NotChecked=0, Total=702 [2020-10-26 19:34:27,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-26 19:34:27,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 70. [2020-10-26 19:34:27,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-26 19:34:27,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 72 transitions. [2020-10-26 19:34:27,476 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 72 transitions. Word has length 60 [2020-10-26 19:34:27,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:34:27,476 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 72 transitions. [2020-10-26 19:34:27,476 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-26 19:34:27,476 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 72 transitions. [2020-10-26 19:34:27,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-26 19:34:27,477 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:34:27,477 INFO L422 BasicCegarLoop]: trace histogram [15, 7, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:34:27,477 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-26 19:34:27,477 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:34:27,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:34:27,478 INFO L82 PathProgramCache]: Analyzing trace with hash -279427231, now seen corresponding path program 15 times [2020-10-26 19:34:27,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:34:27,478 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [527920838] [2020-10-26 19:34:27,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:34:27,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:34:27,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:27,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:30,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:32,499 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:34:32,499 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-26 19:34:32,500 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:34:32,500 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-26 19:34:32,500 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:34:32,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-26 19:34:32,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:34:32,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-26 19:34:32,500 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:34:32,756 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:34:32,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:34:32,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:32,761 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:34:32,761 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:34:32,761 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:34:32,762 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:34:32,762 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:34:32,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:34:32,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:34:32,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:34:32,762 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:34:32,764 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-10-26 19:34:32,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:34:32,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:32,766 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:34:32,766 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:34:32,767 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:34:32,767 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:34:32,767 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:34:32,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:34:32,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:34:32,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:34:32,767 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:34:32,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-10-26 19:34:32,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:34:32,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:32,771 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:34:32,771 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:34:32,771 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:34:32,771 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:34:32,771 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:34:32,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:34:32,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:34:32,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:34:32,772 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:34:32,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-10-26 19:34:32,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:34:32,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:32,775 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:34:32,775 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:34:32,775 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:34:32,775 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:34:32,775 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:34:32,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:34:32,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:34:32,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:34:32,776 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:34:32,777 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-10-26 19:34:32,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:34:32,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:32,779 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:34:32,779 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:34:32,779 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:34:32,779 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:34:32,779 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:34:32,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:34:32,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:34:32,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:34:32,780 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:34:32,785 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 8 proven. 120 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2020-10-26 19:34:32,785 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [527920838] [2020-10-26 19:34:32,785 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:34:32,785 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-26 19:34:32,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861693339] [2020-10-26 19:34:32,786 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-26 19:34:32,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:34:32,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-26 19:34:32,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-26 19:34:32,787 INFO L87 Difference]: Start difference. First operand 70 states and 72 transitions. Second operand 19 states. [2020-10-26 19:34:33,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:34:33,147 INFO L93 Difference]: Finished difference Result 133 states and 142 transitions. [2020-10-26 19:34:33,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-26 19:34:33,147 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 67 [2020-10-26 19:34:33,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:34:33,148 INFO L225 Difference]: With dead ends: 133 [2020-10-26 19:34:33,148 INFO L226 Difference]: Without dead ends: 85 [2020-10-26 19:34:33,149 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-26 19:34:33,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-26 19:34:33,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 72. [2020-10-26 19:34:33,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-26 19:34:33,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 74 transitions. [2020-10-26 19:34:33,161 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 74 transitions. Word has length 67 [2020-10-26 19:34:33,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:34:33,161 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 74 transitions. [2020-10-26 19:34:33,161 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-26 19:34:33,161 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 74 transitions. [2020-10-26 19:34:33,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-26 19:34:33,162 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:34:33,162 INFO L422 BasicCegarLoop]: trace histogram [16, 8, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:34:33,162 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-26 19:34:33,162 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:34:33,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:34:33,163 INFO L82 PathProgramCache]: Analyzing trace with hash 1967122786, now seen corresponding path program 16 times [2020-10-26 19:34:33,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:34:33,163 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [967590090] [2020-10-26 19:34:33,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:34:33,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:34:33,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:33,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:37,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:38,196 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:34:38,196 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-26 19:34:38,196 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:34:38,197 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-26 19:34:38,197 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:34:38,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-26 19:34:38,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:34:38,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-26 19:34:38,197 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:34:38,497 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:34:38,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:34:38,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:38,502 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:34:38,502 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:34:38,502 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:34:38,502 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:34:38,502 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:34:38,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:34:38,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:34:38,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:34:38,503 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:34:38,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-10-26 19:34:38,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:34:38,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:38,507 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:34:38,507 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:34:38,507 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:34:38,507 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:34:38,507 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:34:38,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:34:38,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:34:38,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:34:38,508 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:34:38,509 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-10-26 19:34:38,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:34:38,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:38,511 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:34:38,511 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:34:38,511 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:34:38,511 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:34:38,511 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:34:38,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:34:38,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:34:38,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:34:38,512 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:34:38,513 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-10-26 19:34:38,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:34:38,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:38,514 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:34:38,514 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:34:38,515 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:34:38,515 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:34:38,515 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:34:38,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:34:38,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:34:38,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:34:38,515 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:34:38,516 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-10-26 19:34:38,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:34:38,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:38,518 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:34:38,518 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:34:38,518 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:34:38,518 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:34:38,518 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:34:38,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:34:38,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:34:38,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:34:38,519 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:34:38,523 INFO L134 CoverageAnalysis]: Checked inductivity of 230 backedges. 8 proven. 136 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2020-10-26 19:34:38,524 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [967590090] [2020-10-26 19:34:38,524 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:34:38,524 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-26 19:34:38,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67922506] [2020-10-26 19:34:38,525 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-26 19:34:38,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:34:38,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-26 19:34:38,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-26 19:34:38,525 INFO L87 Difference]: Start difference. First operand 72 states and 74 transitions. Second operand 20 states. [2020-10-26 19:34:38,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:34:38,835 INFO L93 Difference]: Finished difference Result 135 states and 143 transitions. [2020-10-26 19:34:38,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-26 19:34:38,836 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 69 [2020-10-26 19:34:38,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:34:38,837 INFO L225 Difference]: With dead ends: 135 [2020-10-26 19:34:38,837 INFO L226 Difference]: Without dead ends: 86 [2020-10-26 19:34:38,838 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-26 19:34:38,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-26 19:34:38,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 73. [2020-10-26 19:34:38,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-26 19:34:38,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 75 transitions. [2020-10-26 19:34:38,850 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 75 transitions. Word has length 69 [2020-10-26 19:34:38,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:34:38,851 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 75 transitions. [2020-10-26 19:34:38,851 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-26 19:34:38,851 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 75 transitions. [2020-10-26 19:34:38,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-26 19:34:38,852 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:34:38,852 INFO L422 BasicCegarLoop]: trace histogram [17, 8, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:34:38,852 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-26 19:34:38,852 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:34:38,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:34:38,853 INFO L82 PathProgramCache]: Analyzing trace with hash 2125226772, now seen corresponding path program 17 times [2020-10-26 19:34:38,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:34:38,853 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [131664325] [2020-10-26 19:34:38,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:34:38,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:34:38,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:38,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:43,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:43,883 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:34:43,883 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-26 19:34:43,883 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:34:43,883 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-26 19:34:43,884 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:34:43,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-26 19:34:43,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:34:43,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-26 19:34:43,884 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:34:44,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:34:44,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:34:44,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:44,206 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:34:44,206 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:34:44,206 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:34:44,206 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:34:44,206 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:34:44,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:34:44,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:34:44,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:34:44,207 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:34:44,208 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-10-26 19:34:44,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:34:44,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:44,210 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:34:44,210 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:34:44,210 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:34:44,210 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:34:44,210 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:34:44,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:34:44,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:34:44,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:34:44,211 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:34:44,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-10-26 19:34:44,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:34:44,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:44,213 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:34:44,213 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:34:44,213 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:34:44,213 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:34:44,214 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:34:44,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:34:44,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:34:44,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:34:44,214 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:34:44,215 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-10-26 19:34:44,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:34:44,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:44,217 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:34:44,217 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:34:44,217 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:34:44,218 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:34:44,218 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:34:44,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:34:44,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:34:44,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:34:44,218 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:34:44,219 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-10-26 19:34:44,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:34:44,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:44,221 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:34:44,221 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:34:44,221 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:34:44,222 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:34:44,222 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:34:44,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:34:44,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:34:44,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:34:44,222 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:34:44,227 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 8 proven. 153 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2020-10-26 19:34:44,228 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [131664325] [2020-10-26 19:34:44,228 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:34:44,228 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-26 19:34:44,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145064577] [2020-10-26 19:34:44,228 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-26 19:34:44,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:34:44,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-26 19:34:44,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-26 19:34:44,229 INFO L87 Difference]: Start difference. First operand 73 states and 75 transitions. Second operand 21 states. [2020-10-26 19:34:44,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:34:44,569 INFO L93 Difference]: Finished difference Result 140 states and 150 transitions. [2020-10-26 19:34:44,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-26 19:34:44,570 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 70 [2020-10-26 19:34:44,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:34:44,571 INFO L225 Difference]: With dead ends: 140 [2020-10-26 19:34:44,571 INFO L226 Difference]: Without dead ends: 91 [2020-10-26 19:34:44,572 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-26 19:34:44,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-26 19:34:44,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 75. [2020-10-26 19:34:44,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-26 19:34:44,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 77 transitions. [2020-10-26 19:34:44,587 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 77 transitions. Word has length 70 [2020-10-26 19:34:44,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:34:44,587 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 77 transitions. [2020-10-26 19:34:44,587 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-26 19:34:44,587 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 77 transitions. [2020-10-26 19:34:44,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-26 19:34:44,588 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:34:44,588 INFO L422 BasicCegarLoop]: trace histogram [18, 9, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:34:44,588 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-26 19:34:44,588 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:34:44,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:34:44,589 INFO L82 PathProgramCache]: Analyzing trace with hash -713060045, now seen corresponding path program 18 times [2020-10-26 19:34:44,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:34:44,589 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [40569191] [2020-10-26 19:34:44,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:34:44,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:34:44,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:44,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:48,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:49,620 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:34:49,621 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-26 19:34:49,621 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:34:49,621 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-26 19:34:49,621 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:34:49,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-26 19:34:49,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:34:49,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-26 19:34:49,621 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:34:49,918 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:34:49,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:34:49,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:49,925 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:34:49,925 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:34:49,925 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:34:49,925 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:34:49,925 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:34:49,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:34:49,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:34:49,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:34:49,926 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:34:49,928 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-10-26 19:34:49,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:34:49,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:49,930 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:34:49,930 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:34:49,930 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:34:49,931 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:34:49,931 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:34:49,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:34:49,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:34:49,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:34:49,931 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:34:49,933 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-10-26 19:34:49,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:34:49,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:49,937 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:34:49,937 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:34:49,938 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:34:49,938 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:34:49,938 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:34:49,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:34:49,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:34:49,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:34:49,938 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:34:49,939 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2020-10-26 19:34:49,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:34:49,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:49,942 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:34:49,942 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:34:49,942 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:34:49,943 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:34:49,943 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:34:49,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:34:49,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:34:49,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:34:49,943 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:34:49,944 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-10-26 19:34:49,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:34:49,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:49,946 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:34:49,946 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:34:49,946 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:34:49,946 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:34:49,946 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:34:49,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:34:49,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:34:49,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:34:49,947 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:34:49,953 INFO L134 CoverageAnalysis]: Checked inductivity of 274 backedges. 8 proven. 171 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2020-10-26 19:34:49,953 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [40569191] [2020-10-26 19:34:49,953 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:34:49,953 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-26 19:34:49,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648845923] [2020-10-26 19:34:49,954 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-26 19:34:49,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:34:49,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-26 19:34:49,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-26 19:34:49,955 INFO L87 Difference]: Start difference. First operand 75 states and 77 transitions. Second operand 22 states. [2020-10-26 19:34:50,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:34:50,323 INFO L93 Difference]: Finished difference Result 142 states and 151 transitions. [2020-10-26 19:34:50,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-26 19:34:50,324 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 72 [2020-10-26 19:34:50,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:34:50,325 INFO L225 Difference]: With dead ends: 142 [2020-10-26 19:34:50,325 INFO L226 Difference]: Without dead ends: 92 [2020-10-26 19:34:50,326 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-26 19:34:50,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-26 19:34:50,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 76. [2020-10-26 19:34:50,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-26 19:34:50,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 78 transitions. [2020-10-26 19:34:50,338 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 78 transitions. Word has length 72 [2020-10-26 19:34:50,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:34:50,339 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 78 transitions. [2020-10-26 19:34:50,339 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-26 19:34:50,339 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 78 transitions. [2020-10-26 19:34:50,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-26 19:34:50,339 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:34:50,340 INFO L422 BasicCegarLoop]: trace histogram [19, 9, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:34:50,340 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-26 19:34:50,340 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:34:50,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:34:50,340 INFO L82 PathProgramCache]: Analyzing trace with hash 2078630465, now seen corresponding path program 19 times [2020-10-26 19:34:50,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:34:50,341 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [823393672] [2020-10-26 19:34:50,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:34:50,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:34:50,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:50,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:55,361 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:34:55,361 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-26 19:34:55,361 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:34:55,361 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-26 19:34:55,362 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:34:55,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-26 19:34:55,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:34:55,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-26 19:34:55,362 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:34:55,737 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:34:55,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:34:55,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:55,741 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:34:55,741 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:34:55,741 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:34:55,741 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:34:55,741 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:34:55,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:34:55,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:34:55,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:34:55,742 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:34:55,743 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-10-26 19:34:55,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:34:55,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:55,745 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:34:55,745 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:34:55,745 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:34:55,745 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:34:55,745 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:34:55,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:34:55,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:34:55,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:34:55,746 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:34:55,746 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-10-26 19:34:55,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:34:55,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:55,748 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:34:55,748 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:34:55,748 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:34:55,748 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:34:55,748 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:34:55,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:34:55,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:34:55,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:34:55,749 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:34:55,749 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-10-26 19:34:55,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:34:55,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:55,751 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:34:55,751 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:34:55,751 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:34:55,751 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:34:55,752 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:34:55,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:34:55,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:34:55,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:34:55,752 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:34:55,753 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2020-10-26 19:34:55,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:34:55,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:55,755 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:34:55,755 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:34:55,755 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:34:55,755 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:34:55,755 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:34:55,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:34:55,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:34:55,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:34:55,755 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:34:55,760 INFO L134 CoverageAnalysis]: Checked inductivity of 293 backedges. 8 proven. 190 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2020-10-26 19:34:55,760 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [823393672] [2020-10-26 19:34:55,760 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:34:55,760 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-26 19:34:55,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690883236] [2020-10-26 19:34:55,761 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-26 19:34:55,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:34:55,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-26 19:34:55,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-26 19:34:55,762 INFO L87 Difference]: Start difference. First operand 76 states and 78 transitions. Second operand 23 states. [2020-10-26 19:34:56,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:34:56,190 INFO L93 Difference]: Finished difference Result 147 states and 158 transitions. [2020-10-26 19:34:56,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-26 19:34:56,191 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 73 [2020-10-26 19:34:56,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:34:56,192 INFO L225 Difference]: With dead ends: 147 [2020-10-26 19:34:56,192 INFO L226 Difference]: Without dead ends: 97 [2020-10-26 19:34:56,193 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-26 19:34:56,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-26 19:34:56,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 78. [2020-10-26 19:34:56,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-26 19:34:56,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 80 transitions. [2020-10-26 19:34:56,206 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 80 transitions. Word has length 73 [2020-10-26 19:34:56,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:34:56,206 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 80 transitions. [2020-10-26 19:34:56,206 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-26 19:34:56,206 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 80 transitions. [2020-10-26 19:34:56,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-26 19:34:56,207 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:34:56,207 INFO L422 BasicCegarLoop]: trace histogram [20, 10, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:34:56,208 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-26 19:34:56,208 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:34:56,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:34:56,208 INFO L82 PathProgramCache]: Analyzing trace with hash -1016633342, now seen corresponding path program 20 times [2020-10-26 19:34:56,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:34:56,208 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [312083375] [2020-10-26 19:34:56,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:34:56,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:34:56,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:56,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:01,238 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:35:01,239 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-26 19:35:01,239 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:35:01,239 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-26 19:35:01,239 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:35:01,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-26 19:35:01,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:35:01,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-26 19:35:01,239 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:35:01,656 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:35:01,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:35:01,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:01,661 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:35:01,661 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:35:01,661 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:35:01,661 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:35:01,661 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:35:01,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:35:01,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:35:01,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:35:01,662 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:35:01,663 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-10-26 19:35:01,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:35:01,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:01,665 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:35:01,666 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:35:01,666 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:35:01,666 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:35:01,666 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:35:01,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:35:01,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:35:01,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:35:01,666 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:35:01,667 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-10-26 19:35:01,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:35:01,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:01,669 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:35:01,670 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:35:01,670 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:35:01,670 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:35:01,670 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:35:01,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:35:01,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:35:01,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:35:01,670 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:35:01,671 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-10-26 19:35:01,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:35:01,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:01,674 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:35:01,674 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:35:01,674 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:35:01,674 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:35:01,674 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:35:01,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:35:01,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:35:01,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:35:01,675 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:35:01,676 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-10-26 19:35:01,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:35:01,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:01,678 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:35:01,678 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:35:01,678 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:35:01,678 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:35:01,678 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:35:01,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:35:01,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:35:01,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:35:01,679 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:35:01,685 INFO L134 CoverageAnalysis]: Checked inductivity of 323 backedges. 8 proven. 210 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2020-10-26 19:35:01,685 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [312083375] [2020-10-26 19:35:01,685 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:35:01,685 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-26 19:35:01,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168918551] [2020-10-26 19:35:01,686 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-26 19:35:01,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:35:01,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-26 19:35:01,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-26 19:35:01,687 INFO L87 Difference]: Start difference. First operand 78 states and 80 transitions. Second operand 24 states. [2020-10-26 19:35:02,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:35:02,149 INFO L93 Difference]: Finished difference Result 149 states and 159 transitions. [2020-10-26 19:35:02,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-26 19:35:02,150 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 75 [2020-10-26 19:35:02,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:35:02,152 INFO L225 Difference]: With dead ends: 149 [2020-10-26 19:35:02,152 INFO L226 Difference]: Without dead ends: 98 [2020-10-26 19:35:02,153 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-26 19:35:02,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-26 19:35:02,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 79. [2020-10-26 19:35:02,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-26 19:35:02,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 81 transitions. [2020-10-26 19:35:02,164 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 81 transitions. Word has length 75 [2020-10-26 19:35:02,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:35:02,165 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 81 transitions. [2020-10-26 19:35:02,165 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-26 19:35:02,165 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 81 transitions. [2020-10-26 19:35:02,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-26 19:35:02,165 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:35:02,166 INFO L422 BasicCegarLoop]: trace histogram [21, 10, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:35:02,166 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-26 19:35:02,166 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:35:02,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:35:02,166 INFO L82 PathProgramCache]: Analyzing trace with hash -1511369676, now seen corresponding path program 21 times [2020-10-26 19:35:02,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:35:02,167 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2141723801] [2020-10-26 19:35:02,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:35:02,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:35:02,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:02,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:07,184 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:35:07,185 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-26 19:35:07,185 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:35:07,185 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-26 19:35:07,185 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:35:07,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-26 19:35:07,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:35:07,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-26 19:35:07,186 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:35:07,582 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:35:07,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:35:07,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:07,587 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:35:07,587 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:35:07,588 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:35:07,588 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:35:07,588 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:35:07,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:35:07,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:35:07,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:35:07,588 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:35:07,589 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-10-26 19:35:07,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:35:07,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:07,591 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:35:07,591 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:35:07,591 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:35:07,591 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:35:07,591 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:35:07,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:35:07,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:35:07,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:35:07,592 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:35:07,593 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-10-26 19:35:07,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:35:07,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:07,595 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:35:07,595 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:35:07,595 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:35:07,595 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:35:07,595 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:35:07,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:35:07,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:35:07,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:35:07,596 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:35:07,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-10-26 19:35:07,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:35:07,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:07,599 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:35:07,599 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:35:07,599 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:35:07,599 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:35:07,599 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:35:07,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:35:07,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:35:07,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:35:07,600 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:35:07,600 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-10-26 19:35:07,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:35:07,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:07,602 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:35:07,603 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:35:07,603 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:35:07,603 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:35:07,603 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:35:07,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:35:07,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:35:07,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:35:07,603 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:35:07,609 INFO L134 CoverageAnalysis]: Checked inductivity of 344 backedges. 8 proven. 231 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2020-10-26 19:35:07,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2141723801] [2020-10-26 19:35:07,610 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:35:07,610 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-26 19:35:07,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695132642] [2020-10-26 19:35:07,611 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-26 19:35:07,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:35:07,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-26 19:35:07,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-26 19:35:07,612 INFO L87 Difference]: Start difference. First operand 79 states and 81 transitions. Second operand 25 states. [2020-10-26 19:35:07,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:35:07,994 INFO L93 Difference]: Finished difference Result 154 states and 166 transitions. [2020-10-26 19:35:07,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-26 19:35:07,995 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 76 [2020-10-26 19:35:07,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:35:07,997 INFO L225 Difference]: With dead ends: 154 [2020-10-26 19:35:07,997 INFO L226 Difference]: Without dead ends: 103 [2020-10-26 19:35:07,998 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-26 19:35:07,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-26 19:35:08,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 81. [2020-10-26 19:35:08,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-26 19:35:08,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 83 transitions. [2020-10-26 19:35:08,013 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 83 transitions. Word has length 76 [2020-10-26 19:35:08,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:35:08,013 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 83 transitions. [2020-10-26 19:35:08,013 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-26 19:35:08,013 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 83 transitions. [2020-10-26 19:35:08,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-26 19:35:08,014 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:35:08,014 INFO L422 BasicCegarLoop]: trace histogram [22, 11, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:35:08,014 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-26 19:35:08,014 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:35:08,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:35:08,015 INFO L82 PathProgramCache]: Analyzing trace with hash -2092722541, now seen corresponding path program 22 times [2020-10-26 19:35:08,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:35:08,015 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1509636772] [2020-10-26 19:35:08,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:35:08,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:35:08,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:08,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:13,054 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:35:13,054 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-26 19:35:13,054 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:35:13,054 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5019 [2020-10-26 19:35:13,054 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:35:13,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-26 19:35:13,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:35:13,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-26 19:35:13,055 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:35:13,544 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:35:13,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:35:13,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:13,548 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:35:13,549 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:35:13,549 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:35:13,549 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:35:13,549 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:35:13,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:35:13,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:35:13,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:35:13,549 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:35:13,550 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-10-26 19:35:13,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:35:13,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:13,552 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:35:13,552 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:35:13,552 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:35:13,553 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:35:13,553 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:35:13,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:35:13,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:35:13,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:35:13,553 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:35:13,554 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-10-26 19:35:13,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:35:13,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:13,555 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:35:13,555 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:35:13,555 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:35:13,555 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:35:13,555 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:35:13,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:35:13,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:35:13,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:35:13,556 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:35:13,556 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-10-26 19:35:13,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:35:13,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:13,558 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:35:13,558 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:35:13,558 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:35:13,558 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:35:13,558 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:35:13,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:35:13,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:35:13,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:35:13,559 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:35:13,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-10-26 19:35:13,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:35:13,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:13,561 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:35:13,561 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:35:13,561 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:35:13,561 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:35:13,561 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:35:13,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:35:13,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:35:13,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:35:13,561 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:35:13,566 INFO L134 CoverageAnalysis]: Checked inductivity of 377 backedges. 8 proven. 253 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2020-10-26 19:35:13,566 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1509636772] [2020-10-26 19:35:13,566 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:35:13,566 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-26 19:35:13,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663523849] [2020-10-26 19:35:13,567 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-26 19:35:13,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:35:13,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-26 19:35:13,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-26 19:35:13,568 INFO L87 Difference]: Start difference. First operand 81 states and 83 transitions. Second operand 26 states. [2020-10-26 19:35:14,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:35:14,029 INFO L93 Difference]: Finished difference Result 156 states and 167 transitions. [2020-10-26 19:35:14,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-26 19:35:14,030 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 78 [2020-10-26 19:35:14,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:35:14,032 INFO L225 Difference]: With dead ends: 156 [2020-10-26 19:35:14,032 INFO L226 Difference]: Without dead ends: 104 [2020-10-26 19:35:14,033 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-26 19:35:14,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-26 19:35:14,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 82. [2020-10-26 19:35:14,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-26 19:35:14,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 84 transitions. [2020-10-26 19:35:14,044 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 84 transitions. Word has length 78 [2020-10-26 19:35:14,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:35:14,045 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 84 transitions. [2020-10-26 19:35:14,045 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-26 19:35:14,045 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 84 transitions. [2020-10-26 19:35:14,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-26 19:35:14,046 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:35:14,046 INFO L422 BasicCegarLoop]: trace histogram [23, 11, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:35:14,046 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-26 19:35:14,046 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:35:14,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:35:14,047 INFO L82 PathProgramCache]: Analyzing trace with hash -455088863, now seen corresponding path program 23 times [2020-10-26 19:35:14,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:35:14,047 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2072355412] [2020-10-26 19:35:14,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:35:14,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:35:14,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:14,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:19,073 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:35:19,073 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 97 [2020-10-26 19:35:19,074 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:35:19,074 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-26 19:35:19,074 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:35:19,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-26 19:35:19,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:35:19,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-26 19:35:19,074 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:35:19,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:35:19,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:35:19,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:19,598 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:35:19,599 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:35:19,599 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:35:19,599 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:35:19,599 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:35:19,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:35:19,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:35:19,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:35:19,599 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:35:19,600 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-10-26 19:35:19,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:35:19,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:19,602 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:35:19,602 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:35:19,602 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:35:19,602 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:35:19,602 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:35:19,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:35:19,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:35:19,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:35:19,602 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:35:19,603 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2020-10-26 19:35:19,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:35:19,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:19,604 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:35:19,605 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:35:19,605 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:35:19,605 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:35:19,605 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:35:19,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:35:19,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:35:19,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:35:19,605 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:35:19,607 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-10-26 19:35:19,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:35:19,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:19,609 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:35:19,609 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:35:19,609 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:35:19,609 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:35:19,609 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:35:19,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:35:19,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:35:19,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:35:19,610 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:35:19,610 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-10-26 19:35:19,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:35:19,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:19,612 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:35:19,612 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:35:19,612 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:35:19,612 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:35:19,612 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:35:19,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:35:19,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:35:19,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:35:19,612 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:35:19,617 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 8 proven. 276 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2020-10-26 19:35:19,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2072355412] [2020-10-26 19:35:19,617 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:35:19,617 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-26 19:35:19,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074892605] [2020-10-26 19:35:19,618 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-26 19:35:19,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:35:19,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-26 19:35:19,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-26 19:35:19,618 INFO L87 Difference]: Start difference. First operand 82 states and 84 transitions. Second operand 27 states. [2020-10-26 19:35:20,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:35:20,043 INFO L93 Difference]: Finished difference Result 161 states and 174 transitions. [2020-10-26 19:35:20,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-26 19:35:20,043 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 79 [2020-10-26 19:35:20,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:35:20,045 INFO L225 Difference]: With dead ends: 161 [2020-10-26 19:35:20,045 INFO L226 Difference]: Without dead ends: 109 [2020-10-26 19:35:20,046 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-26 19:35:20,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-26 19:35:20,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 84. [2020-10-26 19:35:20,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-26 19:35:20,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 86 transitions. [2020-10-26 19:35:20,061 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 86 transitions. Word has length 79 [2020-10-26 19:35:20,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:35:20,061 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 86 transitions. [2020-10-26 19:35:20,061 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-26 19:35:20,062 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 86 transitions. [2020-10-26 19:35:20,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-26 19:35:20,062 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:35:20,063 INFO L422 BasicCegarLoop]: trace histogram [24, 12, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:35:20,063 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-26 19:35:20,063 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:35:20,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:35:20,065 INFO L82 PathProgramCache]: Analyzing trace with hash 1095392930, now seen corresponding path program 24 times [2020-10-26 19:35:20,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:35:20,065 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [744223154] [2020-10-26 19:35:20,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:35:20,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:35:20,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:20,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:25,094 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:35:25,095 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 99 [2020-10-26 19:35:25,095 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:35:25,095 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-26 19:35:25,095 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:35:25,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-26 19:35:25,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:35:25,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-26 19:35:25,095 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:35:25,663 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:35:25,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:35:25,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:25,668 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:35:25,669 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:35:25,669 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:35:25,669 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:35:25,669 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:35:25,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:35:25,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:35:25,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:35:25,669 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:35:25,673 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-10-26 19:35:25,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:35:25,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:25,675 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:35:25,675 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:35:25,675 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:35:25,675 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:35:25,675 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:35:25,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:35:25,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:35:25,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:35:25,676 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:35:25,676 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-10-26 19:35:25,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:35:25,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:25,678 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:35:25,678 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:35:25,679 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:35:25,679 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:35:25,679 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:35:25,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:35:25,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:35:25,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:35:25,679 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:35:25,680 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-10-26 19:35:25,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:35:25,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:25,682 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:35:25,682 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:35:25,682 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:35:25,682 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:35:25,683 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:35:25,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:35:25,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:35:25,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:35:25,683 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:35:25,684 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2020-10-26 19:35:25,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:35:25,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:25,686 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:35:25,686 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:35:25,686 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:35:25,686 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:35:25,687 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:35:25,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:35:25,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:35:25,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:35:25,687 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:35:25,694 INFO L134 CoverageAnalysis]: Checked inductivity of 436 backedges. 8 proven. 300 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2020-10-26 19:35:25,694 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [744223154] [2020-10-26 19:35:25,694 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:35:25,694 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-26 19:35:25,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301591450] [2020-10-26 19:35:25,695 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-26 19:35:25,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:35:25,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-26 19:35:25,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-26 19:35:25,696 INFO L87 Difference]: Start difference. First operand 84 states and 86 transitions. Second operand 28 states. [2020-10-26 19:35:26,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:35:26,156 INFO L93 Difference]: Finished difference Result 163 states and 175 transitions. [2020-10-26 19:35:26,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-26 19:35:26,157 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 81 [2020-10-26 19:35:26,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:35:26,159 INFO L225 Difference]: With dead ends: 163 [2020-10-26 19:35:26,159 INFO L226 Difference]: Without dead ends: 110 [2020-10-26 19:35:26,160 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-26 19:35:26,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-10-26 19:35:26,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 85. [2020-10-26 19:35:26,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-26 19:35:26,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 87 transitions. [2020-10-26 19:35:26,174 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 87 transitions. Word has length 81 [2020-10-26 19:35:26,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:35:26,174 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 87 transitions. [2020-10-26 19:35:26,174 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-26 19:35:26,174 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 87 transitions. [2020-10-26 19:35:26,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-26 19:35:26,175 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:35:26,175 INFO L422 BasicCegarLoop]: trace histogram [25, 12, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:35:26,175 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-26 19:35:26,176 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:35:26,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:35:26,176 INFO L82 PathProgramCache]: Analyzing trace with hash 1306778964, now seen corresponding path program 25 times [2020-10-26 19:35:26,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:35:26,176 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [927311668] [2020-10-26 19:35:26,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:35:26,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:35:26,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:26,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:31,222 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:35:31,222 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-10-26 19:35:31,222 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:35:31,222 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5022 [2020-10-26 19:35:31,222 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:35:31,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-26 19:35:31,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:35:31,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-26 19:35:31,223 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:35:31,830 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:35:31,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:35:31,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:31,835 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:35:31,835 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:35:31,835 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:35:31,835 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:35:31,835 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:35:31,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:35:31,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:35:31,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:35:31,836 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:35:31,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-10-26 19:35:31,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:35:31,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:31,838 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:35:31,839 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:35:31,839 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:35:31,839 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:35:31,841 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:35:31,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:35:31,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:35:31,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:35:31,842 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:35:31,842 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-10-26 19:35:31,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:35:31,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:31,844 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:35:31,844 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:35:31,845 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:35:31,845 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:35:31,845 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:35:31,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:35:31,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:35:31,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:35:31,845 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:35:31,846 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-10-26 19:35:31,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:35:31,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:31,851 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:35:31,851 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:35:31,851 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:35:31,851 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:35:31,852 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:35:31,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:35:31,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:35:31,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:35:31,852 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:35:31,853 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-10-26 19:35:31,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:35:31,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:31,855 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:35:31,855 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:35:31,855 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:35:31,856 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:35:31,856 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:35:31,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:35:31,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:35:31,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:35:31,856 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:35:31,861 INFO L134 CoverageAnalysis]: Checked inductivity of 461 backedges. 8 proven. 325 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2020-10-26 19:35:31,861 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [927311668] [2020-10-26 19:35:31,861 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:35:31,861 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-26 19:35:31,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149087527] [2020-10-26 19:35:31,862 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-26 19:35:31,862 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:35:31,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-26 19:35:31,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-26 19:35:31,863 INFO L87 Difference]: Start difference. First operand 85 states and 87 transitions. Second operand 29 states. [2020-10-26 19:35:32,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:35:32,444 INFO L93 Difference]: Finished difference Result 168 states and 182 transitions. [2020-10-26 19:35:32,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-26 19:35:32,445 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 82 [2020-10-26 19:35:32,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:35:32,446 INFO L225 Difference]: With dead ends: 168 [2020-10-26 19:35:32,446 INFO L226 Difference]: Without dead ends: 115 [2020-10-26 19:35:32,447 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-26 19:35:32,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-26 19:35:32,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 87. [2020-10-26 19:35:32,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-26 19:35:32,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 89 transitions. [2020-10-26 19:35:32,461 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 89 transitions. Word has length 82 [2020-10-26 19:35:32,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:35:32,461 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 89 transitions. [2020-10-26 19:35:32,461 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-26 19:35:32,461 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 89 transitions. [2020-10-26 19:35:32,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-26 19:35:32,462 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:35:32,462 INFO L422 BasicCegarLoop]: trace histogram [26, 13, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:35:32,462 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-26 19:35:32,462 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:35:32,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:35:32,463 INFO L82 PathProgramCache]: Analyzing trace with hash -650697741, now seen corresponding path program 26 times [2020-10-26 19:35:32,463 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:35:32,463 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1011944686] [2020-10-26 19:35:32,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:35:32,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:35:32,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:32,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:37,492 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:35:37,492 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-26 19:35:37,492 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:35:37,492 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-26 19:35:37,492 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:35:37,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-26 19:35:37,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:35:37,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-26 19:35:37,492 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:35:38,128 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:35:38,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:35:38,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:38,136 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:35:38,136 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:35:38,136 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:35:38,136 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:35:38,137 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:35:38,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:35:38,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:35:38,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:35:38,137 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:35:38,139 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-10-26 19:35:38,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:35:38,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:38,141 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:35:38,141 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:35:38,141 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:35:38,141 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:35:38,141 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:35:38,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:35:38,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:35:38,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:35:38,142 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:35:38,143 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-10-26 19:35:38,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:35:38,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:38,145 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:35:38,145 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:35:38,145 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:35:38,145 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:35:38,145 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:35:38,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:35:38,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:35:38,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:35:38,146 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:35:38,146 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-10-26 19:35:38,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:35:38,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:38,148 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:35:38,148 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:35:38,149 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:35:38,149 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:35:38,149 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:35:38,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:35:38,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:35:38,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:35:38,149 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:35:38,150 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-10-26 19:35:38,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:35:38,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:38,152 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:35:38,152 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:35:38,152 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:35:38,152 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:35:38,152 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:35:38,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:35:38,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:35:38,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:35:38,153 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:35:38,160 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 8 proven. 351 refuted. 0 times theorem prover too weak. 141 trivial. 0 not checked. [2020-10-26 19:35:38,161 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1011944686] [2020-10-26 19:35:38,161 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:35:38,161 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-26 19:35:38,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173327199] [2020-10-26 19:35:38,161 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-26 19:35:38,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:35:38,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-26 19:35:38,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-26 19:35:38,163 INFO L87 Difference]: Start difference. First operand 87 states and 89 transitions. Second operand 30 states. [2020-10-26 19:35:38,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:35:38,762 INFO L93 Difference]: Finished difference Result 170 states and 183 transitions. [2020-10-26 19:35:38,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-26 19:35:38,762 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 84 [2020-10-26 19:35:38,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:35:38,764 INFO L225 Difference]: With dead ends: 170 [2020-10-26 19:35:38,764 INFO L226 Difference]: Without dead ends: 116 [2020-10-26 19:35:38,764 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-26 19:35:38,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-26 19:35:38,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 88. [2020-10-26 19:35:38,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-26 19:35:38,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 90 transitions. [2020-10-26 19:35:38,778 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 90 transitions. Word has length 84 [2020-10-26 19:35:38,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:35:38,778 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 90 transitions. [2020-10-26 19:35:38,778 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-26 19:35:38,778 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 90 transitions. [2020-10-26 19:35:38,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-26 19:35:38,779 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:35:38,779 INFO L422 BasicCegarLoop]: trace histogram [27, 13, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:35:38,779 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-26 19:35:38,779 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:35:38,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:35:38,780 INFO L82 PathProgramCache]: Analyzing trace with hash 328585217, now seen corresponding path program 27 times [2020-10-26 19:35:38,780 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:35:38,780 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [55116002] [2020-10-26 19:35:38,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:35:38,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:35:38,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:38,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:43,810 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:35:43,810 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-10-26 19:35:43,810 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:35:43,810 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-26 19:35:43,811 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:35:43,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-26 19:35:43,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:35:43,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-26 19:35:43,811 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:35:44,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:35:44,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:35:44,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:44,487 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:35:44,487 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:35:44,487 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:35:44,487 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:35:44,488 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:35:44,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:35:44,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:35:44,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:35:44,488 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:35:44,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-10-26 19:35:44,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:35:44,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:44,490 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:35:44,491 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:35:44,491 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:35:44,491 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:35:44,491 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:35:44,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:35:44,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:35:44,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:35:44,491 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:35:44,492 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-10-26 19:35:44,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:35:44,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:44,493 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:35:44,493 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:35:44,493 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:35:44,493 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:35:44,493 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:35:44,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:35:44,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:35:44,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:35:44,494 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:35:44,494 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-10-26 19:35:44,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:35:44,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:44,495 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:35:44,495 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:35:44,495 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:35:44,495 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:35:44,496 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:35:44,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:35:44,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:35:44,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:35:44,496 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:35:44,497 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2020-10-26 19:35:44,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:35:44,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:44,498 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:35:44,498 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:35:44,498 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:35:44,499 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:35:44,499 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:35:44,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:35:44,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:35:44,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:35:44,499 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:35:44,506 INFO L134 CoverageAnalysis]: Checked inductivity of 527 backedges. 8 proven. 378 refuted. 0 times theorem prover too weak. 141 trivial. 0 not checked. [2020-10-26 19:35:44,506 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [55116002] [2020-10-26 19:35:44,507 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:35:44,507 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-26 19:35:44,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573451316] [2020-10-26 19:35:44,507 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-26 19:35:44,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:35:44,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-26 19:35:44,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-26 19:35:44,508 INFO L87 Difference]: Start difference. First operand 88 states and 90 transitions. Second operand 31 states. [2020-10-26 19:35:45,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:35:45,160 INFO L93 Difference]: Finished difference Result 175 states and 190 transitions. [2020-10-26 19:35:45,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-26 19:35:45,161 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 85 [2020-10-26 19:35:45,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:35:45,163 INFO L225 Difference]: With dead ends: 175 [2020-10-26 19:35:45,163 INFO L226 Difference]: Without dead ends: 121 [2020-10-26 19:35:45,164 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-26 19:35:45,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-26 19:35:45,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 90. [2020-10-26 19:35:45,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-26 19:35:45,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 92 transitions. [2020-10-26 19:35:45,178 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 92 transitions. Word has length 85 [2020-10-26 19:35:45,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:35:45,178 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 92 transitions. [2020-10-26 19:35:45,178 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-26 19:35:45,179 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 92 transitions. [2020-10-26 19:35:45,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-26 19:35:45,179 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:35:45,180 INFO L422 BasicCegarLoop]: trace histogram [28, 14, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:35:45,180 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-26 19:35:45,180 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:35:45,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:35:45,180 INFO L82 PathProgramCache]: Analyzing trace with hash -1695363774, now seen corresponding path program 28 times [2020-10-26 19:35:45,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:35:45,181 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1974432095] [2020-10-26 19:35:45,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:35:45,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:35:45,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:45,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:50,212 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:35:50,213 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 105 [2020-10-26 19:35:50,213 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:35:50,213 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-26 19:35:50,213 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:35:50,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-26 19:35:50,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:35:50,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-26 19:35:50,213 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:35:50,935 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:35:50,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:35:50,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:50,938 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:35:50,938 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:35:50,938 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:35:50,939 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:35:50,939 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:35:50,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:35:50,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:35:50,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:35:50,939 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:35:50,940 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-10-26 19:35:50,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:35:50,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:50,942 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:35:50,942 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:35:50,942 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:35:50,942 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:35:50,942 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:35:50,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:35:50,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:35:50,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:35:50,942 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:35:50,943 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2020-10-26 19:35:50,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:35:50,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:50,945 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:35:50,945 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:35:50,945 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:35:50,945 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:35:50,945 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:35:50,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:35:50,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:35:50,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:35:50,946 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:35:50,947 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-10-26 19:35:50,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:35:50,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:50,948 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:35:50,949 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:35:50,949 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:35:50,949 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:35:50,949 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:35:50,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:35:50,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:35:50,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:35:50,949 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:35:50,950 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2020-10-26 19:35:50,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:35:50,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:50,952 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:35:50,952 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:35:50,952 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:35:50,952 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:35:50,952 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:35:50,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:35:50,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:35:50,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:35:50,953 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:35:50,958 INFO L134 CoverageAnalysis]: Checked inductivity of 569 backedges. 8 proven. 406 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2020-10-26 19:35:50,958 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1974432095] [2020-10-26 19:35:50,958 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:35:50,958 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-26 19:35:50,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305697036] [2020-10-26 19:35:50,959 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-26 19:35:50,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:35:50,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-26 19:35:50,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-26 19:35:50,960 INFO L87 Difference]: Start difference. First operand 90 states and 92 transitions. Second operand 32 states. [2020-10-26 19:35:51,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:35:51,458 INFO L93 Difference]: Finished difference Result 177 states and 191 transitions. [2020-10-26 19:35:51,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-26 19:35:51,459 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 87 [2020-10-26 19:35:51,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:35:51,460 INFO L225 Difference]: With dead ends: 177 [2020-10-26 19:35:51,460 INFO L226 Difference]: Without dead ends: 122 [2020-10-26 19:35:51,461 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-26 19:35:51,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-10-26 19:35:51,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 91. [2020-10-26 19:35:51,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-26 19:35:51,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 93 transitions. [2020-10-26 19:35:51,476 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 93 transitions. Word has length 87 [2020-10-26 19:35:51,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:35:51,476 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 93 transitions. [2020-10-26 19:35:51,476 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-26 19:35:51,477 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 93 transitions. [2020-10-26 19:35:51,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-10-26 19:35:51,477 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:35:51,478 INFO L422 BasicCegarLoop]: trace histogram [29, 14, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:35:51,478 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-26 19:35:51,478 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:35:51,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:35:51,478 INFO L82 PathProgramCache]: Analyzing trace with hash 705363572, now seen corresponding path program 29 times [2020-10-26 19:35:51,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:35:51,479 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1385117649] [2020-10-26 19:35:51,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:35:51,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:35:51,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:51,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:56,514 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:35:56,515 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-10-26 19:35:56,515 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:35:56,515 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-26 19:35:56,515 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:35:56,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-26 19:35:56,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:35:56,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-26 19:35:56,515 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:35:57,310 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:35:57,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:35:57,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:57,315 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:35:57,315 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:35:57,315 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:35:57,315 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:35:57,315 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:35:57,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:35:57,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:35:57,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:35:57,316 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:35:57,317 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-10-26 19:35:57,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:35:57,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:57,320 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:35:57,320 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:35:57,320 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:35:57,320 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:35:57,320 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:35:57,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:35:57,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:35:57,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:35:57,321 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:35:57,322 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-10-26 19:35:57,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:35:57,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:57,324 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:35:57,324 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:35:57,324 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:35:57,324 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:35:57,324 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:35:57,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:35:57,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:35:57,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:35:57,325 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:35:57,325 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2020-10-26 19:35:57,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:35:57,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:57,327 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:35:57,328 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:35:57,328 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:35:57,328 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:35:57,328 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:35:57,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:35:57,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:35:57,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:35:57,328 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:35:57,330 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-10-26 19:35:57,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:35:57,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:57,332 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:35:57,332 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:35:57,332 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:35:57,332 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:35:57,332 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:35:57,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:35:57,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:35:57,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:35:57,333 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:35:57,341 INFO L134 CoverageAnalysis]: Checked inductivity of 598 backedges. 8 proven. 435 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2020-10-26 19:35:57,341 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1385117649] [2020-10-26 19:35:57,341 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:35:57,341 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-26 19:35:57,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638094194] [2020-10-26 19:35:57,343 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-26 19:35:57,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:35:57,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-26 19:35:57,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-26 19:35:57,344 INFO L87 Difference]: Start difference. First operand 91 states and 93 transitions. Second operand 33 states. [2020-10-26 19:35:57,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:35:57,854 INFO L93 Difference]: Finished difference Result 182 states and 198 transitions. [2020-10-26 19:35:57,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-26 19:35:57,855 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 88 [2020-10-26 19:35:57,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:35:57,856 INFO L225 Difference]: With dead ends: 182 [2020-10-26 19:35:57,856 INFO L226 Difference]: Without dead ends: 127 [2020-10-26 19:35:57,857 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-26 19:35:57,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-10-26 19:35:57,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 93. [2020-10-26 19:35:57,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-26 19:35:57,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 95 transitions. [2020-10-26 19:35:57,878 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 95 transitions. Word has length 88 [2020-10-26 19:35:57,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:35:57,878 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 95 transitions. [2020-10-26 19:35:57,878 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-26 19:35:57,878 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 95 transitions. [2020-10-26 19:35:57,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-10-26 19:35:57,880 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:35:57,880 INFO L422 BasicCegarLoop]: trace histogram [30, 15, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:35:57,880 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-26 19:35:57,880 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:35:57,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:35:57,881 INFO L82 PathProgramCache]: Analyzing trace with hash 1603287379, now seen corresponding path program 30 times [2020-10-26 19:35:57,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:35:57,881 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1241417913] [2020-10-26 19:35:57,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:35:57,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:35:57,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:58,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:36:02,914 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:36:02,915 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 108 [2020-10-26 19:36:02,915 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:36:02,915 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-26 19:36:02,915 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:36:02,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-26 19:36:02,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:36:02,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-26 19:36:02,915 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:36:03,731 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:36:03,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:36:03,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:36:03,736 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:36:03,736 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:36:03,736 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:36:03,736 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:36:03,737 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:36:03,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:36:03,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:36:03,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:36:03,737 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:36:03,739 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-10-26 19:36:03,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:36:03,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:36:03,740 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:36:03,741 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:36:03,741 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:36:03,741 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:36:03,741 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:36:03,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:36:03,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:36:03,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:36:03,741 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:36:03,743 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-10-26 19:36:03,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:36:03,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:36:03,745 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:36:03,745 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:36:03,745 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:36:03,745 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:36:03,746 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:36:03,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:36:03,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:36:03,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:36:03,746 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:36:03,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2020-10-26 19:36:03,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:36:03,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:36:03,750 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:36:03,750 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:36:03,750 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:36:03,750 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:36:03,750 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:36:03,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:36:03,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:36:03,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:36:03,751 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:36:03,752 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2020-10-26 19:36:03,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:36:03,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:36:03,754 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:36:03,754 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:36:03,754 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:36:03,754 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:36:03,754 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:36:03,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:36:03,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:36:03,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:36:03,755 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:36:03,764 INFO L134 CoverageAnalysis]: Checked inductivity of 643 backedges. 8 proven. 465 refuted. 0 times theorem prover too weak. 170 trivial. 0 not checked. [2020-10-26 19:36:03,764 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1241417913] [2020-10-26 19:36:03,764 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:36:03,764 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-26 19:36:03,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353324851] [2020-10-26 19:36:03,765 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-26 19:36:03,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:36:03,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-26 19:36:03,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-26 19:36:03,766 INFO L87 Difference]: Start difference. First operand 93 states and 95 transitions. Second operand 34 states. [2020-10-26 19:36:04,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:36:04,322 INFO L93 Difference]: Finished difference Result 184 states and 199 transitions. [2020-10-26 19:36:04,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-26 19:36:04,323 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 90 [2020-10-26 19:36:04,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:36:04,324 INFO L225 Difference]: With dead ends: 184 [2020-10-26 19:36:04,324 INFO L226 Difference]: Without dead ends: 128 [2020-10-26 19:36:04,325 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-26 19:36:04,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-26 19:36:04,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 94. [2020-10-26 19:36:04,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-26 19:36:04,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 96 transitions. [2020-10-26 19:36:04,343 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 96 transitions. Word has length 90 [2020-10-26 19:36:04,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:36:04,343 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 96 transitions. [2020-10-26 19:36:04,343 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-26 19:36:04,343 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 96 transitions. [2020-10-26 19:36:04,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-10-26 19:36:04,344 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:36:04,344 INFO L422 BasicCegarLoop]: trace histogram [31, 15, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:36:04,344 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-26 19:36:04,344 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:36:04,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:36:04,344 INFO L82 PathProgramCache]: Analyzing trace with hash 1876239073, now seen corresponding path program 31 times [2020-10-26 19:36:04,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:36:04,345 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [433041575] [2020-10-26 19:36:04,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:36:04,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:36:04,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:36:04,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:36:09,388 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:36:09,388 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 109 [2020-10-26 19:36:09,388 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:36:09,388 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-26 19:36:09,388 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:36:09,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-26 19:36:09,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:36:09,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-26 19:36:09,389 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:36:10,177 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:36:10,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:36:10,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:36:10,182 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:36:10,182 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:36:10,182 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:36:10,182 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:36:10,183 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:36:10,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:36:10,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:36:10,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:36:10,183 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:36:10,185 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-10-26 19:36:10,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:36:10,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:36:10,187 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:36:10,187 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:36:10,187 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:36:10,188 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:36:10,188 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:36:10,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:36:10,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:36:10,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:36:10,188 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:36:10,198 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-10-26 19:36:10,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:36:10,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:36:10,202 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:36:10,202 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:36:10,202 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:36:10,202 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:36:10,202 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:36:10,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:36:10,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:36:10,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:36:10,203 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:36:10,203 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-10-26 19:36:10,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:36:10,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:36:10,211 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:36:10,212 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:36:10,212 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:36:10,212 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 19:36:10,212 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:36:10,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:36:10,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:36:10,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:36:10,212 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:36:10,215 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2020-10-26 19:36:10,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:36:10,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:36:10,217 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:36:10,218 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:36:10,218 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:36:10,218 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:36:10,218 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:36:10,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:36:10,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:36:10,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:36:10,219 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:36:10,228 INFO L134 CoverageAnalysis]: Checked inductivity of 674 backedges. 8 proven. 496 refuted. 0 times theorem prover too weak. 170 trivial. 0 not checked. [2020-10-26 19:36:10,228 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [433041575] [2020-10-26 19:36:10,228 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:36:10,228 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-26 19:36:10,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786884441] [2020-10-26 19:36:10,229 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-26 19:36:10,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:36:10,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-26 19:36:10,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-26 19:36:10,230 INFO L87 Difference]: Start difference. First operand 94 states and 96 transitions. Second operand 35 states. [2020-10-26 19:36:10,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:36:10,935 INFO L93 Difference]: Finished difference Result 189 states and 206 transitions. [2020-10-26 19:36:10,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-26 19:36:10,936 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 91 [2020-10-26 19:36:10,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:36:10,938 INFO L225 Difference]: With dead ends: 189 [2020-10-26 19:36:10,938 INFO L226 Difference]: Without dead ends: 133 [2020-10-26 19:36:10,939 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-26 19:36:10,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-10-26 19:36:10,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 96. [2020-10-26 19:36:10,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-26 19:36:10,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 98 transitions. [2020-10-26 19:36:10,960 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 98 transitions. Word has length 91 [2020-10-26 19:36:10,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:36:10,960 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 98 transitions. [2020-10-26 19:36:10,960 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-26 19:36:10,960 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 98 transitions. [2020-10-26 19:36:10,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-10-26 19:36:10,961 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:36:10,961 INFO L422 BasicCegarLoop]: trace histogram [32, 16, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:36:10,961 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-26 19:36:10,962 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:36:10,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:36:10,962 INFO L82 PathProgramCache]: Analyzing trace with hash -1142246430, now seen corresponding path program 32 times [2020-10-26 19:36:10,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:36:10,962 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1852989181] [2020-10-26 19:36:10,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:36:11,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:36:11,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:36:11,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:36:16,012 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:36:16,012 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 111 [2020-10-26 19:36:16,012 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:36:16,012 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-26 19:36:16,012 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:36:16,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-26 19:36:16,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:36:16,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-26 19:36:16,013 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:36:16,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:36:16,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:36:16,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:36:16,883 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:36:16,883 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:36:16,883 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:36:16,883 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:36:16,883 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:36:16,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:36:16,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:36:16,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:36:16,883 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:36:16,884 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-10-26 19:36:16,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:36:16,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:36:16,886 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:36:16,886 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:36:16,886 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:36:16,886 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:36:16,886 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:36:16,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:36:16,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:36:16,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:36:16,887 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:36:16,887 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-10-26 19:36:16,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:36:16,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:36:16,889 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:36:16,889 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:36:16,889 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:36:16,889 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:36:16,890 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:36:16,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:36:16,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:36:16,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:36:16,890 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:36:16,891 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-10-26 19:36:16,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:36:16,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:36:16,892 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:36:16,892 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:36:16,893 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:36:16,893 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:36:16,893 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:36:16,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:36:16,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:36:16,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:36:16,893 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:36:16,894 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2020-10-26 19:36:16,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:36:16,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:36:16,895 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:36:16,895 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:36:16,895 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:36:16,895 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:36:16,895 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:36:16,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:36:16,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:36:16,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:36:16,896 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:36:16,902 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 8 proven. 528 refuted. 0 times theorem prover too weak. 186 trivial. 0 not checked. [2020-10-26 19:36:16,902 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1852989181] [2020-10-26 19:36:16,902 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:36:16,902 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-26 19:36:16,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112238891] [2020-10-26 19:36:16,903 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-26 19:36:16,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:36:16,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-26 19:36:16,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-26 19:36:16,904 INFO L87 Difference]: Start difference. First operand 96 states and 98 transitions. Second operand 36 states. [2020-10-26 19:36:17,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:36:17,654 INFO L93 Difference]: Finished difference Result 191 states and 207 transitions. [2020-10-26 19:36:17,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-26 19:36:17,655 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 93 [2020-10-26 19:36:17,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:36:17,657 INFO L225 Difference]: With dead ends: 191 [2020-10-26 19:36:17,657 INFO L226 Difference]: Without dead ends: 134 [2020-10-26 19:36:17,658 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-26 19:36:17,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-10-26 19:36:17,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 97. [2020-10-26 19:36:17,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-26 19:36:17,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 99 transitions. [2020-10-26 19:36:17,674 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 99 transitions. Word has length 93 [2020-10-26 19:36:17,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:36:17,674 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 99 transitions. [2020-10-26 19:36:17,675 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-26 19:36:17,675 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 99 transitions. [2020-10-26 19:36:17,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-10-26 19:36:17,675 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:36:17,675 INFO L422 BasicCegarLoop]: trace histogram [33, 16, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:36:17,676 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-26 19:36:17,676 INFO L429 AbstractCegarLoop]: === Iteration 42 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:36:17,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:36:17,676 INFO L82 PathProgramCache]: Analyzing trace with hash -11421804, now seen corresponding path program 33 times [2020-10-26 19:36:17,676 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:36:17,676 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [623049501] [2020-10-26 19:36:17,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:36:17,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:36:17,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:36:17,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:36:22,726 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:36:22,726 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-26 19:36:22,726 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:36:22,726 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5023 [2020-10-26 19:36:22,726 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:36:22,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-26 19:36:22,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:36:22,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-26 19:36:22,726 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:36:23,618 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:36:23,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:36:23,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:36:23,622 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:36:23,623 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:36:23,623 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:36:23,623 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:36:23,623 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:36:23,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:36:23,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:36:23,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:36:23,623 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:36:23,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2020-10-26 19:36:23,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:36:23,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:36:23,626 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:36:23,626 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:36:23,626 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:36:23,626 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:36:23,626 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:36:23,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:36:23,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:36:23,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:36:23,626 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:36:23,627 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-10-26 19:36:23,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:36:23,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:36:23,628 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:36:23,628 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:36:23,628 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:36:23,628 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:36:23,629 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:36:23,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:36:23,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:36:23,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:36:23,629 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:36:23,630 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2020-10-26 19:36:23,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:36:23,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:36:23,631 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:36:23,631 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:36:23,631 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:36:23,631 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:36:23,632 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:36:23,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:36:23,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:36:23,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:36:23,632 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:36:23,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-10-26 19:36:23,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:36:23,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:36:23,634 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:36:23,634 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:36:23,634 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:36:23,634 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:36:23,634 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:36:23,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:36:23,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:36:23,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:36:23,635 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:36:23,641 INFO L134 CoverageAnalysis]: Checked inductivity of 755 backedges. 8 proven. 561 refuted. 0 times theorem prover too weak. 186 trivial. 0 not checked. [2020-10-26 19:36:23,641 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [623049501] [2020-10-26 19:36:23,642 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:36:23,642 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-26 19:36:23,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779322408] [2020-10-26 19:36:23,642 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-26 19:36:23,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:36:23,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-26 19:36:23,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-26 19:36:23,643 INFO L87 Difference]: Start difference. First operand 97 states and 99 transitions. Second operand 37 states. [2020-10-26 19:36:24,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:36:24,325 INFO L93 Difference]: Finished difference Result 196 states and 214 transitions. [2020-10-26 19:36:24,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-26 19:36:24,326 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 94 [2020-10-26 19:36:24,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:36:24,328 INFO L225 Difference]: With dead ends: 196 [2020-10-26 19:36:24,328 INFO L226 Difference]: Without dead ends: 139 [2020-10-26 19:36:24,329 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-26 19:36:24,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-10-26 19:36:24,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 99. [2020-10-26 19:36:24,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-26 19:36:24,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 101 transitions. [2020-10-26 19:36:24,348 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 101 transitions. Word has length 94 [2020-10-26 19:36:24,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:36:24,348 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 101 transitions. [2020-10-26 19:36:24,348 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-26 19:36:24,348 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 101 transitions. [2020-10-26 19:36:24,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-10-26 19:36:24,349 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:36:24,349 INFO L422 BasicCegarLoop]: trace histogram [34, 17, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:36:24,349 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-26 19:36:24,349 INFO L429 AbstractCegarLoop]: === Iteration 43 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:36:24,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:36:24,350 INFO L82 PathProgramCache]: Analyzing trace with hash 251975347, now seen corresponding path program 34 times [2020-10-26 19:36:24,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:36:24,350 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1352979350] [2020-10-26 19:36:24,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:36:24,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:36:24,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:36:24,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:36:29,385 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:36:29,385 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 114 [2020-10-26 19:36:29,385 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:36:29,385 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-26 19:36:29,385 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:36:29,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-26 19:36:29,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:36:29,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-26 19:36:29,385 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:36:30,341 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:36:30,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:36:30,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:36:30,346 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:36:30,346 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:36:30,346 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:36:30,346 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:36:30,346 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:36:30,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:36:30,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:36:30,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:36:30,347 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:36:30,348 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-10-26 19:36:30,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:36:30,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:36:30,350 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:36:30,351 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:36:30,351 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:36:30,351 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:36:30,351 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:36:30,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:36:30,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:36:30,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:36:30,351 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:36:30,352 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-10-26 19:36:30,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:36:30,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:36:30,354 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:36:30,354 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:36:30,354 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:36:30,355 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:36:30,355 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:36:30,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:36:30,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:36:30,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:36:30,355 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:36:30,356 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2020-10-26 19:36:30,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:36:30,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:36:30,358 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:36:30,358 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:36:30,358 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:36:30,358 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:36:30,358 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:36:30,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:36:30,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:36:30,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:36:30,359 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:36:30,359 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-10-26 19:36:30,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:36:30,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:36:30,362 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:36:30,362 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:36:30,362 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:36:30,362 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:36:30,362 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:36:30,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:36:30,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:36:30,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:36:30,363 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:36:30,370 INFO L134 CoverageAnalysis]: Checked inductivity of 806 backedges. 8 proven. 595 refuted. 0 times theorem prover too weak. 203 trivial. 0 not checked. [2020-10-26 19:36:30,371 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1352979350] [2020-10-26 19:36:30,371 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:36:30,371 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-26 19:36:30,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423042111] [2020-10-26 19:36:30,371 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-26 19:36:30,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:36:30,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-26 19:36:30,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-26 19:36:30,373 INFO L87 Difference]: Start difference. First operand 99 states and 101 transitions. Second operand 38 states. [2020-10-26 19:36:31,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:36:31,040 INFO L93 Difference]: Finished difference Result 198 states and 215 transitions. [2020-10-26 19:36:31,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-26 19:36:31,040 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 96 [2020-10-26 19:36:31,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:36:31,042 INFO L225 Difference]: With dead ends: 198 [2020-10-26 19:36:31,042 INFO L226 Difference]: Without dead ends: 140 [2020-10-26 19:36:31,044 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-26 19:36:31,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-10-26 19:36:31,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 100. [2020-10-26 19:36:31,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-26 19:36:31,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 102 transitions. [2020-10-26 19:36:31,060 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 102 transitions. Word has length 96 [2020-10-26 19:36:31,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:36:31,060 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 102 transitions. [2020-10-26 19:36:31,060 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-26 19:36:31,061 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 102 transitions. [2020-10-26 19:36:31,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-10-26 19:36:31,061 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:36:31,061 INFO L422 BasicCegarLoop]: trace histogram [35, 17, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:36:31,062 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-26 19:36:31,062 INFO L429 AbstractCegarLoop]: === Iteration 44 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:36:31,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:36:31,062 INFO L82 PathProgramCache]: Analyzing trace with hash -1075061311, now seen corresponding path program 35 times [2020-10-26 19:36:31,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:36:31,062 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [445329977] [2020-10-26 19:36:31,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:36:31,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:36:31,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:36:31,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:36:36,093 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:36:36,093 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 115 [2020-10-26 19:36:36,093 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:36:36,093 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-26 19:36:36,093 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:36:36,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-26 19:36:36,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:36:36,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-26 19:36:36,093 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:36:37,123 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:36:37,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:36:37,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:36:37,127 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:36:37,127 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:36:37,127 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:36:37,127 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:36:37,127 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:36:37,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:36:37,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:36:37,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:36:37,128 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:36:37,129 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-10-26 19:36:37,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:36:37,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:36:37,130 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:36:37,130 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:36:37,132 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:36:37,132 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:36:37,133 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:36:37,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:36:37,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:36:37,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:36:37,133 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:36:37,134 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2020-10-26 19:36:37,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:36:37,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:36:37,136 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:36:37,136 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:36:37,136 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:36:37,136 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:36:37,136 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:36:37,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:36:37,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:36:37,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:36:37,136 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:36:37,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2020-10-26 19:36:37,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:36:37,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:36:37,138 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:36:37,139 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:36:37,139 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:36:37,139 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:36:37,139 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:36:37,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:36:37,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:36:37,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:36:37,139 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:36:37,140 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2020-10-26 19:36:37,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:36:37,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:36:37,141 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:36:37,141 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:36:37,141 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:36:37,142 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:36:37,142 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:36:37,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:36:37,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:36:37,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:36:37,142 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:36:37,149 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 8 proven. 630 refuted. 0 times theorem prover too weak. 203 trivial. 0 not checked. [2020-10-26 19:36:37,149 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [445329977] [2020-10-26 19:36:37,149 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:36:37,149 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-26 19:36:37,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286609345] [2020-10-26 19:36:37,149 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-26 19:36:37,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:36:37,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-26 19:36:37,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-26 19:36:37,151 INFO L87 Difference]: Start difference. First operand 100 states and 102 transitions. Second operand 39 states. [2020-10-26 19:36:38,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:36:38,061 INFO L93 Difference]: Finished difference Result 203 states and 222 transitions. [2020-10-26 19:36:38,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-26 19:36:38,061 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 97 [2020-10-26 19:36:38,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:36:38,063 INFO L225 Difference]: With dead ends: 203 [2020-10-26 19:36:38,063 INFO L226 Difference]: Without dead ends: 145 [2020-10-26 19:36:38,064 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-26 19:36:38,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-10-26 19:36:38,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 102. [2020-10-26 19:36:38,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-26 19:36:38,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 104 transitions. [2020-10-26 19:36:38,083 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 104 transitions. Word has length 97 [2020-10-26 19:36:38,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:36:38,083 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 104 transitions. [2020-10-26 19:36:38,083 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-26 19:36:38,083 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 104 transitions. [2020-10-26 19:36:38,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-10-26 19:36:38,084 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:36:38,084 INFO L422 BasicCegarLoop]: trace histogram [36, 18, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:36:38,084 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-26 19:36:38,084 INFO L429 AbstractCegarLoop]: === Iteration 45 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:36:38,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:36:38,085 INFO L82 PathProgramCache]: Analyzing trace with hash 1866207874, now seen corresponding path program 36 times [2020-10-26 19:36:38,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:36:38,085 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1985819855] [2020-10-26 19:36:38,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:36:38,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:36:38,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:36:38,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:36:43,125 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:36:43,125 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-26 19:36:43,126 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:36:43,126 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-26 19:36:43,126 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:36:43,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-26 19:36:43,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:36:43,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-26 19:36:43,126 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:36:44,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:36:44,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:36:44,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:36:44,235 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:36:44,235 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:36:44,235 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:36:44,235 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:36:44,236 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:36:44,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:36:44,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:36:44,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:36:44,236 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:36:44,237 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-10-26 19:36:44,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:36:44,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:36:44,238 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:36:44,238 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:36:44,238 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:36:44,239 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:36:44,239 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:36:44,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:36:44,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:36:44,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:36:44,239 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:36:44,240 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2020-10-26 19:36:44,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:36:44,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:36:44,241 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:36:44,241 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:36:44,241 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:36:44,241 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:36:44,241 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:36:44,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:36:44,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:36:44,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:36:44,242 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:36:44,242 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2020-10-26 19:36:44,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:36:44,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:36:44,243 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:36:44,243 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:36:44,243 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:36:44,243 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:36:44,243 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:36:44,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:36:44,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:36:44,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:36:44,244 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:36:44,244 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2020-10-26 19:36:44,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:36:44,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:36:44,246 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:36:44,246 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:36:44,246 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:36:44,246 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:36:44,246 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:36:44,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:36:44,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:36:44,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:36:44,247 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:36:44,254 INFO L134 CoverageAnalysis]: Checked inductivity of 895 backedges. 8 proven. 666 refuted. 0 times theorem prover too weak. 221 trivial. 0 not checked. [2020-10-26 19:36:44,255 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1985819855] [2020-10-26 19:36:44,255 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:36:44,255 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-26 19:36:44,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98703737] [2020-10-26 19:36:44,255 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-26 19:36:44,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:36:44,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-26 19:36:44,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-26 19:36:44,256 INFO L87 Difference]: Start difference. First operand 102 states and 104 transitions. Second operand 40 states. [2020-10-26 19:36:44,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:36:44,956 INFO L93 Difference]: Finished difference Result 205 states and 223 transitions. [2020-10-26 19:36:44,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-26 19:36:44,957 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 99 [2020-10-26 19:36:44,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:36:44,958 INFO L225 Difference]: With dead ends: 205 [2020-10-26 19:36:44,959 INFO L226 Difference]: Without dead ends: 146 [2020-10-26 19:36:44,960 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-26 19:36:44,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-10-26 19:36:44,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 103. [2020-10-26 19:36:44,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-10-26 19:36:44,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 105 transitions. [2020-10-26 19:36:44,980 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 105 transitions. Word has length 99 [2020-10-26 19:36:44,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:36:44,981 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 105 transitions. [2020-10-26 19:36:44,981 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-26 19:36:44,981 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 105 transitions. [2020-10-26 19:36:44,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-10-26 19:36:44,981 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:36:44,981 INFO L422 BasicCegarLoop]: trace histogram [37, 18, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:36:44,982 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-26 19:36:44,982 INFO L429 AbstractCegarLoop]: === Iteration 46 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:36:44,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:36:44,982 INFO L82 PathProgramCache]: Analyzing trace with hash -1003878220, now seen corresponding path program 37 times [2020-10-26 19:36:44,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:36:44,982 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1408611519] [2020-10-26 19:36:44,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:36:45,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:36:45,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:36:45,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:36:50,049 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:36:50,049 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 118 [2020-10-26 19:36:50,049 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:36:50,049 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5035 [2020-10-26 19:36:50,049 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:36:50,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-26 19:36:50,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:36:50,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-26 19:36:50,050 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:36:51,246 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:36:51,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:36:51,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:36:51,250 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:36:51,250 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:36:51,251 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:36:51,251 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:36:51,251 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:36:51,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:36:51,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:36:51,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:36:51,251 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:36:51,252 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-10-26 19:36:51,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:36:51,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:36:51,254 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:36:51,254 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:36:51,254 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:36:51,254 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:36:51,254 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:36:51,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:36:51,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:36:51,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:36:51,254 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:36:51,255 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-10-26 19:36:51,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:36:51,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:36:51,257 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:36:51,257 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:36:51,257 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:36:51,257 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:36:51,257 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:36:51,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:36:51,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:36:51,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:36:51,258 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:36:51,258 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2020-10-26 19:36:51,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:36:51,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:36:51,260 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:36:51,260 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:36:51,260 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:36:51,260 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:36:51,260 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:36:51,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:36:51,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:36:51,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:36:51,260 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:36:51,261 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2020-10-26 19:36:51,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:36:51,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:36:51,262 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:36:51,262 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:36:51,262 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:36:51,262 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:36:51,263 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:36:51,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:36:51,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:36:51,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:36:51,263 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:36:51,270 INFO L134 CoverageAnalysis]: Checked inductivity of 932 backedges. 8 proven. 703 refuted. 0 times theorem prover too weak. 221 trivial. 0 not checked. [2020-10-26 19:36:51,270 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1408611519] [2020-10-26 19:36:51,270 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:36:51,270 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-26 19:36:51,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585379408] [2020-10-26 19:36:51,271 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-26 19:36:51,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:36:51,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-26 19:36:51,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-26 19:36:51,272 INFO L87 Difference]: Start difference. First operand 103 states and 105 transitions. Second operand 41 states. [2020-10-26 19:36:52,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:36:52,035 INFO L93 Difference]: Finished difference Result 210 states and 230 transitions. [2020-10-26 19:36:52,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-26 19:36:52,036 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 100 [2020-10-26 19:36:52,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:36:52,037 INFO L225 Difference]: With dead ends: 210 [2020-10-26 19:36:52,037 INFO L226 Difference]: Without dead ends: 151 [2020-10-26 19:36:52,038 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-26 19:36:52,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-10-26 19:36:52,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 105. [2020-10-26 19:36:52,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-26 19:36:52,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 107 transitions. [2020-10-26 19:36:52,060 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 107 transitions. Word has length 100 [2020-10-26 19:36:52,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:36:52,060 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 107 transitions. [2020-10-26 19:36:52,060 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-26 19:36:52,060 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 107 transitions. [2020-10-26 19:36:52,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-10-26 19:36:52,061 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:36:52,061 INFO L422 BasicCegarLoop]: trace histogram [38, 19, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:36:52,061 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-26 19:36:52,061 INFO L429 AbstractCegarLoop]: === Iteration 47 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:36:52,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:36:52,062 INFO L82 PathProgramCache]: Analyzing trace with hash -1328874477, now seen corresponding path program 38 times [2020-10-26 19:36:52,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:36:52,062 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [638849866] [2020-10-26 19:36:52,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:36:52,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:36:52,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:36:52,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking...