/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=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --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-industry-pattern/array_of_struct_loop_dep.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 09:19:58,846 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 09:19:58,851 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 09:19:58,901 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 09:19:58,901 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 09:19:58,903 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 09:19:58,905 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 09:19:58,907 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 09:19:58,910 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 09:19:58,911 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 09:19:58,913 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 09:19:58,914 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 09:19:58,915 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 09:19:58,916 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 09:19:58,917 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 09:19:58,919 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 09:19:58,920 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 09:19:58,921 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 09:19:58,949 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 09:19:58,952 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 09:19:58,954 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 09:19:58,955 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 09:19:58,957 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 09:19:58,958 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 09:19:58,962 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 09:19:58,962 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 09:19:58,963 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 09:19:58,964 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 09:19:58,965 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 09:19:58,966 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 09:19:58,966 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 09:19:58,967 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 09:19:58,969 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 09:19:58,970 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 09:19:58,972 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 09:19:58,972 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 09:19:58,973 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 09:19:58,974 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 09:19:58,974 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 09:19:58,975 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 09:19:58,976 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 09:19:58,978 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 [2020-10-28 09:19:59,007 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 09:19:59,008 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 09:19:59,010 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 09:19:59,010 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 09:19:59,010 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 09:19:59,011 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 09:19:59,011 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 09:19:59,011 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 09:19:59,012 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 09:19:59,012 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 09:19:59,012 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 09:19:59,012 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 09:19:59,013 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 09:19:59,013 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 09:19:59,013 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 09:19:59,014 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 09:19:59,014 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 09:19:59,014 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 09:19:59,014 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 09:19:59,015 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 09:19:59,015 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 09:19:59,015 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 09:19:59,016 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 09:19:59,016 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 09:19:59,016 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 09:19:59,017 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 09:19:59,017 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 09:19:59,017 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 09:19:59,018 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 09:19:59,018 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 09:19:59,412 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 09:19:59,458 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 09:19:59,463 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 09:19:59,465 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 09:19:59,466 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 09:19:59,471 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-industry-pattern/array_of_struct_loop_dep.i [2020-10-28 09:19:59,571 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/77eae25b3/677ad62fea814826bc2d182344c523b2/FLAGc169c5214 [2020-10-28 09:20:00,256 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 09:20:00,257 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-industry-pattern/array_of_struct_loop_dep.i [2020-10-28 09:20:00,270 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/77eae25b3/677ad62fea814826bc2d182344c523b2/FLAGc169c5214 [2020-10-28 09:20:00,628 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/77eae25b3/677ad62fea814826bc2d182344c523b2 [2020-10-28 09:20:00,633 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 09:20:00,642 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 09:20:00,646 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 09:20:00,647 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 09:20:00,651 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 09:20:00,652 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 09:20:00" (1/1) ... [2020-10-28 09:20:00,657 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1853a320 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:20:00, skipping insertion in model container [2020-10-28 09:20:00,658 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 09:20:00" (1/1) ... [2020-10-28 09:20:00,669 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 09:20:00,692 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 09:20:00,958 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 09:20:02,402 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 09:20:02,425 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 09:20:02,452 INFO L208 MainTranslator]: Completed translation [2020-10-28 09:20:02,453 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:20:02 WrapperNode [2020-10-28 09:20:02,453 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 09:20:02,454 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 09:20:02,454 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 09:20:02,454 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 09:20:02,469 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:20:02" (1/1) ... [2020-10-28 09:20:02,469 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:20:02" (1/1) ... [2020-10-28 09:20:02,483 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:20:02" (1/1) ... [2020-10-28 09:20:02,483 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:20:02" (1/1) ... [2020-10-28 09:20:02,507 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:20:02" (1/1) ... [2020-10-28 09:20:02,514 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:20:02" (1/1) ... [2020-10-28 09:20:02,518 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:20:02" (1/1) ... [2020-10-28 09:20:02,521 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 09:20:02,523 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 09:20:02,524 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 09:20:02,524 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 09:20:02,525 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:20:02" (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 [2020-10-28 09:20:02,614 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 09:20:02,615 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 09:20:02,615 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 09:20:02,615 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-28 09:20:02,616 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 09:20:02,616 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 09:20:02,616 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 09:20:02,616 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-28 09:20:02,617 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-28 09:20:02,617 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 09:20:02,618 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 09:20:02,618 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-28 09:20:02,618 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 09:20:02,619 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 09:20:02,619 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 09:20:02,620 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 09:20:02,620 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 09:20:02,620 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 09:20:02,620 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 09:20:02,921 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 09:20:02,922 INFO L298 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-28 09:20:02,923 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 09:20:02 BoogieIcfgContainer [2020-10-28 09:20:02,924 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 09:20:02,927 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 09:20:02,927 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 09:20:02,932 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 09:20:02,932 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 09:20:00" (1/3) ... [2020-10-28 09:20:02,934 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@de6227d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 09:20:02, skipping insertion in model container [2020-10-28 09:20:02,934 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:20:02" (2/3) ... [2020-10-28 09:20:02,935 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@de6227d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 09:20:02, skipping insertion in model container [2020-10-28 09:20:02,935 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 09:20:02" (3/3) ... [2020-10-28 09:20:02,937 INFO L111 eAbstractionObserver]: Analyzing ICFG array_of_struct_loop_dep.i [2020-10-28 09:20:02,952 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 09:20:02,958 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 09:20:02,985 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 09:20:03,045 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 09:20:03,048 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 09:20:03,048 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 09:20:03,049 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 09:20:03,049 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 09:20:03,049 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 09:20:03,049 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 09:20:03,049 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 09:20:03,067 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states. [2020-10-28 09:20:03,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-28 09:20:03,074 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:20:03,074 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:20:03,075 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:20:03,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:20:03,082 INFO L82 PathProgramCache]: Analyzing trace with hash -110565287, now seen corresponding path program 1 times [2020-10-28 09:20:03,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:20:03,092 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [135995858] [2020-10-28 09:20:03,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:20:03,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:03,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:03,376 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:03,377 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-28 09:20:03,377 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:20:03,377 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 140 [2020-10-28 09:20:03,382 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:03,383 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:03,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:20:03,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 09:20:03,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:20:03,384 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-10-28 09:20:03,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:20:03,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:03,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:03,554 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:03,554 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:20:03,554 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:20:03,554 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-28 09:20:03,555 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:03,555 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:03,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:20:03,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:20:03,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:20:03,556 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:20:03,570 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 09:20:03,571 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [135995858] [2020-10-28 09:20:03,573 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 09:20:03,574 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-28 09:20:03,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919144289] [2020-10-28 09:20:03,579 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-28 09:20:03,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:20:03,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-28 09:20:03,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-28 09:20:03,598 INFO L87 Difference]: Start difference. First operand 30 states. Second operand 3 states. [2020-10-28 09:20:03,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:20:03,727 INFO L93 Difference]: Finished difference Result 59 states and 78 transitions. [2020-10-28 09:20:03,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-28 09:20:03,729 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2020-10-28 09:20:03,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:20:03,739 INFO L225 Difference]: With dead ends: 59 [2020-10-28 09:20:03,740 INFO L226 Difference]: Without dead ends: 29 [2020-10-28 09:20:03,743 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-28 09:20:03,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-28 09:20:03,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 22. [2020-10-28 09:20:03,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-28 09:20:03,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2020-10-28 09:20:03,795 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 15 [2020-10-28 09:20:03,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:20:03,796 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2020-10-28 09:20:03,796 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-28 09:20:03,796 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2020-10-28 09:20:03,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-28 09:20:03,797 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:20:03,798 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:20:03,798 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 09:20:03,798 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:20:03,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:20:03,800 INFO L82 PathProgramCache]: Analyzing trace with hash 2144226899, now seen corresponding path program 1 times [2020-10-28 09:20:03,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:20:03,800 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [472451848] [2020-10-28 09:20:03,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:20:03,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:03,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:04,000 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:04,001 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-28 09:20:04,001 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:20:04,001 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 180 [2020-10-28 09:20:04,001 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:04,001 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:04,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 09:20:04,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:20:04,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 09:20:04,002 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:04,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:20:04,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:04,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:04,078 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:04,078 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:20:04,079 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:20:04,079 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 09:20:04,079 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:04,079 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:04,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:20:04,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:20:04,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:20:04,080 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:04,088 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 09:20:04,088 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [472451848] [2020-10-28 09:20:04,088 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 09:20:04,089 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 09:20:04,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67620582] [2020-10-28 09:20:04,090 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 09:20:04,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:20:04,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 09:20:04,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 09:20:04,092 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand 4 states. [2020-10-28 09:20:04,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:20:04,223 INFO L93 Difference]: Finished difference Result 43 states and 49 transitions. [2020-10-28 09:20:04,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 09:20:04,224 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2020-10-28 09:20:04,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:20:04,225 INFO L225 Difference]: With dead ends: 43 [2020-10-28 09:20:04,226 INFO L226 Difference]: Without dead ends: 29 [2020-10-28 09:20:04,227 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 09:20:04,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-28 09:20:04,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2020-10-28 09:20:04,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-28 09:20:04,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2020-10-28 09:20:04,237 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 15 [2020-10-28 09:20:04,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:20:04,237 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2020-10-28 09:20:04,237 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 09:20:04,237 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2020-10-28 09:20:04,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-28 09:20:04,239 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:20:04,239 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:20:04,239 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 09:20:04,239 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:20:04,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:20:04,240 INFO L82 PathProgramCache]: Analyzing trace with hash -246080399, now seen corresponding path program 1 times [2020-10-28 09:20:04,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:20:04,241 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [571064277] [2020-10-28 09:20:04,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:20:04,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:04,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:04,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:04,684 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:04,685 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-28 09:20:04,685 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:20:04,685 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 425 [2020-10-28 09:20:04,686 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:04,686 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:04,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 09:20:04,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:20:04,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-28 09:20:04,687 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:20:04,736 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:20:04,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:04,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:04,748 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:04,748 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:20:04,748 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:20:04,748 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 09:20:04,749 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:04,749 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:04,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:20:04,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:20:04,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:20:04,749 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:04,756 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 09:20:04,756 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [571064277] [2020-10-28 09:20:04,757 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:20:04,757 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 09:20:04,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037139166] [2020-10-28 09:20:04,758 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 09:20:04,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:20:04,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 09:20:04,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 09:20:04,759 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand 5 states. [2020-10-28 09:20:04,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:20:04,920 INFO L93 Difference]: Finished difference Result 54 states and 62 transitions. [2020-10-28 09:20:04,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 09:20:04,920 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2020-10-28 09:20:04,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:20:04,922 INFO L225 Difference]: With dead ends: 54 [2020-10-28 09:20:04,922 INFO L226 Difference]: Without dead ends: 36 [2020-10-28 09:20:04,922 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-28 09:20:04,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-28 09:20:04,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2020-10-28 09:20:04,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-28 09:20:04,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2020-10-28 09:20:04,932 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 17 [2020-10-28 09:20:04,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:20:04,932 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2020-10-28 09:20:04,932 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 09:20:04,933 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2020-10-28 09:20:04,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-28 09:20:04,933 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:20:04,934 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:20:04,934 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 09:20:04,934 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:20:04,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:20:04,935 INFO L82 PathProgramCache]: Analyzing trace with hash 476109583, now seen corresponding path program 2 times [2020-10-28 09:20:04,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:20:04,935 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [362753770] [2020-10-28 09:20:04,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:20:04,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:04,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:04,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:05,424 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:05,425 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-28 09:20:05,425 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:20:05,425 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 476 [2020-10-28 09:20:05,425 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:05,425 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:05,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 09:20:05,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:20:05,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 09:20:05,429 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 09:20:05,500 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:20:05,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:05,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:05,512 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:05,513 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:20:05,513 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:20:05,513 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 09:20:05,513 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:05,514 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:05,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:20:05,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:20:05,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:20:05,514 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:05,518 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 09:20:05,519 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [362753770] [2020-10-28 09:20:05,519 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:20:05,519 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 09:20:05,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854687815] [2020-10-28 09:20:05,520 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 09:20:05,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:20:05,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 09:20:05,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-28 09:20:05,522 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand 6 states. [2020-10-28 09:20:05,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:20:05,687 INFO L93 Difference]: Finished difference Result 66 states and 76 transitions. [2020-10-28 09:20:05,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 09:20:05,688 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2020-10-28 09:20:05,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:20:05,689 INFO L225 Difference]: With dead ends: 66 [2020-10-28 09:20:05,690 INFO L226 Difference]: Without dead ends: 43 [2020-10-28 09:20:05,691 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-28 09:20:05,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-28 09:20:05,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 41. [2020-10-28 09:20:05,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-28 09:20:05,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 46 transitions. [2020-10-28 09:20:05,701 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 46 transitions. Word has length 19 [2020-10-28 09:20:05,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:20:05,702 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 46 transitions. [2020-10-28 09:20:05,702 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 09:20:05,702 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 46 transitions. [2020-10-28 09:20:05,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-28 09:20:05,703 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:20:05,703 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:20:05,703 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 09:20:05,704 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:20:05,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:20:05,704 INFO L82 PathProgramCache]: Analyzing trace with hash -1284019667, now seen corresponding path program 3 times [2020-10-28 09:20:05,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:20:05,705 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [489799285] [2020-10-28 09:20:05,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:20:05,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:05,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:05,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:06,481 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:06,483 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-28 09:20:06,483 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:20:06,483 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 763 [2020-10-28 09:20:06,483 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:06,484 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:06,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 09:20:06,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:20:06,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-28 09:20:06,486 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-28 09:20:06,554 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:20:06,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:06,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:06,563 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:06,564 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:20:06,564 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:20:06,564 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 09:20:06,565 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:06,565 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:06,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:20:06,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:20:06,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:20:06,566 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:20:06,571 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 09:20:06,571 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [489799285] [2020-10-28 09:20:06,572 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:20:06,572 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 09:20:06,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017627369] [2020-10-28 09:20:06,573 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 09:20:06,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:20:06,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 09:20:06,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-28 09:20:06,574 INFO L87 Difference]: Start difference. First operand 41 states and 46 transitions. Second operand 7 states. [2020-10-28 09:20:06,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:20:06,766 INFO L93 Difference]: Finished difference Result 78 states and 90 transitions. [2020-10-28 09:20:06,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 09:20:06,767 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 21 [2020-10-28 09:20:06,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:20:06,768 INFO L225 Difference]: With dead ends: 78 [2020-10-28 09:20:06,769 INFO L226 Difference]: Without dead ends: 50 [2020-10-28 09:20:06,770 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2020-10-28 09:20:06,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-28 09:20:06,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 48. [2020-10-28 09:20:06,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-28 09:20:06,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 54 transitions. [2020-10-28 09:20:06,780 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 54 transitions. Word has length 21 [2020-10-28 09:20:06,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:20:06,781 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 54 transitions. [2020-10-28 09:20:06,781 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 09:20:06,781 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 54 transitions. [2020-10-28 09:20:06,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-28 09:20:06,782 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:20:06,782 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:20:06,782 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 09:20:06,783 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:20:06,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:20:06,783 INFO L82 PathProgramCache]: Analyzing trace with hash -551114293, now seen corresponding path program 4 times [2020-10-28 09:20:06,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:20:06,784 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [310997144] [2020-10-28 09:20:06,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:20:06,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:06,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:06,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:07,494 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:07,494 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-28 09:20:07,494 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:20:07,494 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 696 [2020-10-28 09:20:07,495 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:07,495 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:07,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 09:20:07,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:20:07,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-28 09:20:07,495 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:07,578 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:20:07,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:07,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:07,588 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:07,588 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:20:07,589 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:20:07,589 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 09:20:07,589 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:07,589 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:07,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:20:07,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:20:07,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:20:07,590 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:07,594 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 09:20:07,595 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [310997144] [2020-10-28 09:20:07,595 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:20:07,595 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 09:20:07,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973388449] [2020-10-28 09:20:07,596 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 09:20:07,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:20:07,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 09:20:07,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-28 09:20:07,597 INFO L87 Difference]: Start difference. First operand 48 states and 54 transitions. Second operand 8 states. [2020-10-28 09:20:07,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:20:07,817 INFO L93 Difference]: Finished difference Result 90 states and 104 transitions. [2020-10-28 09:20:07,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 09:20:07,818 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 23 [2020-10-28 09:20:07,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:20:07,819 INFO L225 Difference]: With dead ends: 90 [2020-10-28 09:20:07,819 INFO L226 Difference]: Without dead ends: 57 [2020-10-28 09:20:07,820 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2020-10-28 09:20:07,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-28 09:20:07,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 55. [2020-10-28 09:20:07,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-28 09:20:07,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 62 transitions. [2020-10-28 09:20:07,829 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 62 transitions. Word has length 23 [2020-10-28 09:20:07,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:20:07,830 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 62 transitions. [2020-10-28 09:20:07,830 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 09:20:07,830 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 62 transitions. [2020-10-28 09:20:07,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-28 09:20:07,831 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:20:07,831 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:20:07,831 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 09:20:07,831 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:20:07,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:20:07,832 INFO L82 PathProgramCache]: Analyzing trace with hash -603686423, now seen corresponding path program 5 times [2020-10-28 09:20:07,832 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:20:07,832 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1115231165] [2020-10-28 09:20:07,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:20:07,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:07,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:07,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:08,769 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:08,769 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-28 09:20:08,770 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:20:08,770 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 925 [2020-10-28 09:20:08,770 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:08,770 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:08,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 09:20:08,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:20:08,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-28 09:20:08,771 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:08,909 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:20:08,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:08,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:08,917 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:08,917 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:20:08,918 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:20:08,918 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 09:20:08,918 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:08,918 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:08,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:20:08,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:20:08,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:20:08,919 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:08,924 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-10-28 09:20:08,924 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1115231165] [2020-10-28 09:20:08,925 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:20:08,925 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-28 09:20:08,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845223026] [2020-10-28 09:20:08,925 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 09:20:08,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:20:08,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 09:20:08,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-28 09:20:08,927 INFO L87 Difference]: Start difference. First operand 55 states and 62 transitions. Second operand 9 states. [2020-10-28 09:20:09,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:20:09,444 INFO L93 Difference]: Finished difference Result 71 states and 76 transitions. [2020-10-28 09:20:09,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 09:20:09,444 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 25 [2020-10-28 09:20:09,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:20:09,445 INFO L225 Difference]: With dead ends: 71 [2020-10-28 09:20:09,445 INFO L226 Difference]: Without dead ends: 67 [2020-10-28 09:20:09,446 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2020-10-28 09:20:09,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-28 09:20:09,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 63. [2020-10-28 09:20:09,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-28 09:20:09,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 69 transitions. [2020-10-28 09:20:09,456 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 69 transitions. Word has length 25 [2020-10-28 09:20:09,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:20:09,457 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 69 transitions. [2020-10-28 09:20:09,457 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 09:20:09,457 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 69 transitions. [2020-10-28 09:20:09,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-28 09:20:09,459 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:20:09,459 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:20:09,460 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 09:20:09,460 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:20:09,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:20:09,460 INFO L82 PathProgramCache]: Analyzing trace with hash -626965023, now seen corresponding path program 1 times [2020-10-28 09:20:09,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:20:09,461 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [925130318] [2020-10-28 09:20:09,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:20:09,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:09,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:09,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:09,984 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:09,984 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-28 09:20:09,985 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:20:09,985 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 507 [2020-10-28 09:20:09,985 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:09,985 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:09,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 09:20:09,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:20:09,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-28 09:20:09,986 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:20:10,077 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:20:10,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:10,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:10,085 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:10,085 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:20:10,085 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:20:10,085 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 09:20:10,085 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:10,086 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:10,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:20:10,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:20:10,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:20:10,086 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:20:10,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-28 09:20:10,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:10,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:10,093 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:10,093 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:20:10,094 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:20:10,094 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:20:10,094 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:10,094 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:10,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:20:10,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:20:10,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:20:10,095 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:10,100 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 25 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 09:20:10,100 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [925130318] [2020-10-28 09:20:10,101 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:20:10,101 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-28 09:20:10,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644762857] [2020-10-28 09:20:10,101 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 09:20:10,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:20:10,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 09:20:10,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-28 09:20:10,103 INFO L87 Difference]: Start difference. First operand 63 states and 69 transitions. Second operand 9 states. [2020-10-28 09:20:10,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:20:10,372 INFO L93 Difference]: Finished difference Result 118 states and 132 transitions. [2020-10-28 09:20:10,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 09:20:10,372 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 34 [2020-10-28 09:20:10,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:20:10,374 INFO L225 Difference]: With dead ends: 118 [2020-10-28 09:20:10,374 INFO L226 Difference]: Without dead ends: 72 [2020-10-28 09:20:10,375 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2020-10-28 09:20:10,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-28 09:20:10,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 70. [2020-10-28 09:20:10,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-28 09:20:10,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 77 transitions. [2020-10-28 09:20:10,385 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 77 transitions. Word has length 34 [2020-10-28 09:20:10,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:20:10,385 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 77 transitions. [2020-10-28 09:20:10,386 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 09:20:10,386 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 77 transitions. [2020-10-28 09:20:10,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-28 09:20:10,387 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:20:10,387 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:20:10,387 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 09:20:10,387 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:20:10,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:20:10,388 INFO L82 PathProgramCache]: Analyzing trace with hash 1590875907, now seen corresponding path program 2 times [2020-10-28 09:20:10,388 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:20:10,388 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [382779170] [2020-10-28 09:20:10,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:20:10,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:10,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:10,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:10,959 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:10,959 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-28 09:20:10,959 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:20:10,959 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 557 [2020-10-28 09:20:10,959 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:10,960 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:10,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 09:20:10,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:20:10,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-28 09:20:10,960 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:11,060 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:20:11,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:11,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:11,067 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:11,068 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:20:11,068 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:20:11,068 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 09:20:11,068 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:11,068 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:11,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:20:11,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:20:11,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:20:11,069 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:11,072 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-10-28 09:20:11,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:11,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:11,076 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:11,076 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:20:11,076 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:20:11,076 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:20:11,076 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:11,077 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:11,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:20:11,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:20:11,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:20:11,077 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:11,081 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 2 proven. 36 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 09:20:11,082 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [382779170] [2020-10-28 09:20:11,082 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:20:11,082 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 09:20:11,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99714050] [2020-10-28 09:20:11,083 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 09:20:11,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:20:11,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 09:20:11,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-28 09:20:11,084 INFO L87 Difference]: Start difference. First operand 70 states and 77 transitions. Second operand 10 states. [2020-10-28 09:20:11,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:20:11,319 INFO L93 Difference]: Finished difference Result 130 states and 146 transitions. [2020-10-28 09:20:11,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 09:20:11,319 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 36 [2020-10-28 09:20:11,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:20:11,320 INFO L225 Difference]: With dead ends: 130 [2020-10-28 09:20:11,321 INFO L226 Difference]: Without dead ends: 79 [2020-10-28 09:20:11,322 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=62, Unknown=0, NotChecked=0, Total=110 [2020-10-28 09:20:11,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-28 09:20:11,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 77. [2020-10-28 09:20:11,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-28 09:20:11,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 85 transitions. [2020-10-28 09:20:11,332 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 85 transitions. Word has length 36 [2020-10-28 09:20:11,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:20:11,332 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 85 transitions. [2020-10-28 09:20:11,333 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 09:20:11,333 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 85 transitions. [2020-10-28 09:20:11,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-28 09:20:11,334 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:20:11,334 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:20:11,334 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 09:20:11,334 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:20:11,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:20:11,335 INFO L82 PathProgramCache]: Analyzing trace with hash -1662736475, now seen corresponding path program 3 times [2020-10-28 09:20:11,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:20:11,335 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [510984107] [2020-10-28 09:20:11,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:20:11,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:11,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:11,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:12,138 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:12,139 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-28 09:20:12,139 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:20:12,139 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 790 [2020-10-28 09:20:12,140 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:12,140 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:12,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 09:20:12,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:20:12,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 09:20:12,141 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:20:12,265 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:20:12,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:12,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:12,272 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:12,273 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:20:12,273 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:20:12,273 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 09:20:12,273 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:12,273 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:12,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:20:12,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:20:12,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:20:12,274 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:12,277 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-28 09:20:12,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:12,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:12,280 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:12,280 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:20:12,280 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:20:12,281 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:20:12,281 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:12,281 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:12,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:20:12,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:20:12,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:20:12,282 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:12,285 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 2 proven. 49 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 09:20:12,286 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [510984107] [2020-10-28 09:20:12,286 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:20:12,286 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 09:20:12,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495473127] [2020-10-28 09:20:12,287 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 09:20:12,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:20:12,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 09:20:12,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-28 09:20:12,288 INFO L87 Difference]: Start difference. First operand 77 states and 85 transitions. Second operand 11 states. [2020-10-28 09:20:12,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:20:12,609 INFO L93 Difference]: Finished difference Result 142 states and 160 transitions. [2020-10-28 09:20:12,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 09:20:12,610 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 38 [2020-10-28 09:20:12,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:20:12,611 INFO L225 Difference]: With dead ends: 142 [2020-10-28 09:20:12,611 INFO L226 Difference]: Without dead ends: 86 [2020-10-28 09:20:12,612 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=74, Unknown=0, NotChecked=0, Total=132 [2020-10-28 09:20:12,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-28 09:20:12,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 84. [2020-10-28 09:20:12,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-28 09:20:12,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 93 transitions. [2020-10-28 09:20:12,623 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 93 transitions. Word has length 38 [2020-10-28 09:20:12,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:20:12,623 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 93 transitions. [2020-10-28 09:20:12,623 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 09:20:12,624 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 93 transitions. [2020-10-28 09:20:12,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-28 09:20:12,625 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:20:12,625 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:20:12,625 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 09:20:12,625 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:20:12,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:20:12,626 INFO L82 PathProgramCache]: Analyzing trace with hash -1648044089, now seen corresponding path program 4 times [2020-10-28 09:20:12,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:20:12,627 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2144834142] [2020-10-28 09:20:12,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:20:12,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:12,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:12,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:13,702 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:13,702 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-28 09:20:13,703 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:20:13,703 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1058 [2020-10-28 09:20:13,703 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:13,703 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:13,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 09:20:13,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:20:13,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-28 09:20:13,704 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:13,832 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:20:13,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:13,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:13,839 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:13,839 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:20:13,839 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:20:13,839 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:20:13,839 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:13,840 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:13,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:20:13,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:20:13,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:20:13,840 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:13,843 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-10-28 09:20:13,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:13,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:13,846 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:13,846 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:20:13,846 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:20:13,846 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:20:13,846 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:13,847 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:13,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:20:13,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:20:13,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:20:13,847 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:13,851 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 2 proven. 64 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 09:20:13,852 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2144834142] [2020-10-28 09:20:13,852 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:20:13,852 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 09:20:13,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446673619] [2020-10-28 09:20:13,853 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 09:20:13,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:20:13,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 09:20:13,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-28 09:20:13,854 INFO L87 Difference]: Start difference. First operand 84 states and 93 transitions. Second operand 12 states. [2020-10-28 09:20:14,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:20:14,171 INFO L93 Difference]: Finished difference Result 154 states and 174 transitions. [2020-10-28 09:20:14,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 09:20:14,172 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 40 [2020-10-28 09:20:14,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:20:14,173 INFO L225 Difference]: With dead ends: 154 [2020-10-28 09:20:14,173 INFO L226 Difference]: Without dead ends: 93 [2020-10-28 09:20:14,174 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=87, Unknown=0, NotChecked=0, Total=156 [2020-10-28 09:20:14,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-28 09:20:14,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 91. [2020-10-28 09:20:14,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-28 09:20:14,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 101 transitions. [2020-10-28 09:20:14,184 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 101 transitions. Word has length 40 [2020-10-28 09:20:14,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:20:14,184 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 101 transitions. [2020-10-28 09:20:14,184 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 09:20:14,184 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 101 transitions. [2020-10-28 09:20:14,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-28 09:20:14,185 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:20:14,186 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:20:14,186 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 09:20:14,186 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:20:14,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:20:14,187 INFO L82 PathProgramCache]: Analyzing trace with hash -413563031, now seen corresponding path program 5 times [2020-10-28 09:20:14,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:20:14,187 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [31390329] [2020-10-28 09:20:14,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:20:14,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:14,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:14,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:15,067 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:15,068 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-28 09:20:15,068 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:20:15,068 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 868 [2020-10-28 09:20:15,068 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:15,068 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:15,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 09:20:15,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:20:15,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-28 09:20:15,069 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:15,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:20:15,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:15,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:15,218 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:15,218 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:20:15,218 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:20:15,218 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:20:15,218 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:15,219 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:15,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:20:15,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:20:15,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:20:15,219 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:15,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-10-28 09:20:15,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:15,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:15,225 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:15,225 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:20:15,225 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:20:15,225 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:20:15,225 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:15,226 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:15,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:20:15,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:20:15,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:20:15,226 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:15,230 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 2 proven. 81 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 09:20:15,231 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [31390329] [2020-10-28 09:20:15,231 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:20:15,231 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 09:20:15,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268910625] [2020-10-28 09:20:15,232 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 09:20:15,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:20:15,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 09:20:15,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-28 09:20:15,233 INFO L87 Difference]: Start difference. First operand 91 states and 101 transitions. Second operand 13 states. [2020-10-28 09:20:15,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:20:15,609 INFO L93 Difference]: Finished difference Result 166 states and 188 transitions. [2020-10-28 09:20:15,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 09:20:15,609 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 42 [2020-10-28 09:20:15,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:20:15,611 INFO L225 Difference]: With dead ends: 166 [2020-10-28 09:20:15,611 INFO L226 Difference]: Without dead ends: 100 [2020-10-28 09:20:15,612 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=101, Unknown=0, NotChecked=0, Total=182 [2020-10-28 09:20:15,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-28 09:20:15,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 98. [2020-10-28 09:20:15,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-28 09:20:15,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 109 transitions. [2020-10-28 09:20:15,620 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 109 transitions. Word has length 42 [2020-10-28 09:20:15,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:20:15,620 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 109 transitions. [2020-10-28 09:20:15,621 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 09:20:15,621 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 109 transitions. [2020-10-28 09:20:15,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-28 09:20:15,622 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:20:15,622 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:20:15,622 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 09:20:15,622 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:20:15,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:20:15,623 INFO L82 PathProgramCache]: Analyzing trace with hash 511760011, now seen corresponding path program 6 times [2020-10-28 09:20:15,623 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:20:15,623 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [757113155] [2020-10-28 09:20:15,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:20:15,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:15,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:15,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:16,416 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:16,417 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-28 09:20:16,417 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:20:16,417 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 777 [2020-10-28 09:20:16,417 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:16,418 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:16,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 09:20:16,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:20:16,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-28 09:20:16,418 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:16,595 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:20:16,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:16,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:16,602 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:16,602 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:20:16,603 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:20:16,603 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 09:20:16,603 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:16,603 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:16,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:20:16,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:20:16,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:20:16,604 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:16,607 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-28 09:20:16,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:16,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:16,611 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:16,611 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:20:16,611 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:20:16,611 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:20:16,611 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:16,612 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:16,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:20:16,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:20:16,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:20:16,612 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:16,618 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 2 proven. 100 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 09:20:16,618 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [757113155] [2020-10-28 09:20:16,618 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:20:16,618 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 09:20:16,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836927223] [2020-10-28 09:20:16,619 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 09:20:16,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:20:16,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 09:20:16,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-28 09:20:16,620 INFO L87 Difference]: Start difference. First operand 98 states and 109 transitions. Second operand 14 states. [2020-10-28 09:20:17,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:20:17,000 INFO L93 Difference]: Finished difference Result 178 states and 202 transitions. [2020-10-28 09:20:17,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-28 09:20:17,001 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 44 [2020-10-28 09:20:17,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:20:17,002 INFO L225 Difference]: With dead ends: 178 [2020-10-28 09:20:17,002 INFO L226 Difference]: Without dead ends: 107 [2020-10-28 09:20:17,003 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=94, Invalid=116, Unknown=0, NotChecked=0, Total=210 [2020-10-28 09:20:17,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-28 09:20:17,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 105. [2020-10-28 09:20:17,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-28 09:20:17,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 117 transitions. [2020-10-28 09:20:17,012 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 117 transitions. Word has length 44 [2020-10-28 09:20:17,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:20:17,012 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 117 transitions. [2020-10-28 09:20:17,012 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 09:20:17,012 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 117 transitions. [2020-10-28 09:20:17,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-28 09:20:17,013 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:20:17,013 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:20:17,014 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-28 09:20:17,014 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:20:17,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:20:17,014 INFO L82 PathProgramCache]: Analyzing trace with hash 688973101, now seen corresponding path program 7 times [2020-10-28 09:20:17,014 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:20:17,015 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1569263488] [2020-10-28 09:20:17,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:20:17,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:17,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:17,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:17,925 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:17,925 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-28 09:20:17,925 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:20:17,926 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 896 [2020-10-28 09:20:17,926 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:17,926 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:17,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-28 09:20:17,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:20:17,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-28 09:20:17,927 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:18,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:20:18,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:18,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:18,139 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:18,139 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:20:18,140 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:20:18,140 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 09:20:18,140 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:18,140 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:18,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:20:18,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:20:18,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:20:18,142 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-28 09:20:18,145 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-10-28 09:20:18,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:18,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:18,150 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:18,151 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:20:18,151 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:20:18,151 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:20:18,151 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:18,151 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:18,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:20:18,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:20:18,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:20:18,152 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:18,156 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 2 proven. 121 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 09:20:18,157 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1569263488] [2020-10-28 09:20:18,157 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:20:18,157 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-28 09:20:18,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457142580] [2020-10-28 09:20:18,158 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-28 09:20:18,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:20:18,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-28 09:20:18,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-28 09:20:18,159 INFO L87 Difference]: Start difference. First operand 105 states and 117 transitions. Second operand 15 states. [2020-10-28 09:20:18,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:20:18,556 INFO L93 Difference]: Finished difference Result 190 states and 216 transitions. [2020-10-28 09:20:18,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-28 09:20:18,557 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 46 [2020-10-28 09:20:18,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:20:18,559 INFO L225 Difference]: With dead ends: 190 [2020-10-28 09:20:18,560 INFO L226 Difference]: Without dead ends: 114 [2020-10-28 09:20:18,560 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=108, Invalid=132, Unknown=0, NotChecked=0, Total=240 [2020-10-28 09:20:18,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-28 09:20:18,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 112. [2020-10-28 09:20:18,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-10-28 09:20:18,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 125 transitions. [2020-10-28 09:20:18,574 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 125 transitions. Word has length 46 [2020-10-28 09:20:18,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:20:18,575 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 125 transitions. [2020-10-28 09:20:18,575 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-28 09:20:18,575 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 125 transitions. [2020-10-28 09:20:18,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-28 09:20:18,578 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:20:18,578 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:20:18,579 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-28 09:20:18,579 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:20:18,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:20:18,580 INFO L82 PathProgramCache]: Analyzing trace with hash -807939249, now seen corresponding path program 8 times [2020-10-28 09:20:18,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:20:18,580 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1464656471] [2020-10-28 09:20:18,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:20:18,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:18,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:18,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:19,662 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:19,663 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-28 09:20:19,663 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:20:19,663 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1060 [2020-10-28 09:20:19,663 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:19,663 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:19,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 09:20:19,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:20:19,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-28 09:20:19,664 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:19,851 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:20:19,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:19,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:19,857 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:19,857 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:20:19,857 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:20:19,857 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:20:19,858 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:19,858 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:19,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:20:19,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:20:19,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:20:19,858 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:19,861 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-10-28 09:20:19,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:19,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:19,864 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:19,864 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:20:19,864 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:20:19,864 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:20:19,865 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:19,865 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:19,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:20:19,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:20:19,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:20:19,865 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:19,872 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 2 proven. 144 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 09:20:19,872 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1464656471] [2020-10-28 09:20:19,872 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:20:19,872 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-28 09:20:19,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80056531] [2020-10-28 09:20:19,874 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-28 09:20:19,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:20:19,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-28 09:20:19,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-28 09:20:19,876 INFO L87 Difference]: Start difference. First operand 112 states and 125 transitions. Second operand 16 states. [2020-10-28 09:20:20,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:20:20,238 INFO L93 Difference]: Finished difference Result 202 states and 230 transitions. [2020-10-28 09:20:20,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-28 09:20:20,239 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 48 [2020-10-28 09:20:20,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:20:20,240 INFO L225 Difference]: With dead ends: 202 [2020-10-28 09:20:20,240 INFO L226 Difference]: Without dead ends: 121 [2020-10-28 09:20:20,241 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=123, Invalid=149, Unknown=0, NotChecked=0, Total=272 [2020-10-28 09:20:20,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-28 09:20:20,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 119. [2020-10-28 09:20:20,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-10-28 09:20:20,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 133 transitions. [2020-10-28 09:20:20,250 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 133 transitions. Word has length 48 [2020-10-28 09:20:20,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:20:20,250 INFO L481 AbstractCegarLoop]: Abstraction has 119 states and 133 transitions. [2020-10-28 09:20:20,250 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-28 09:20:20,251 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 133 transitions. [2020-10-28 09:20:20,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-28 09:20:20,251 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:20:20,251 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:20:20,252 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-28 09:20:20,252 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:20:20,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:20:20,252 INFO L82 PathProgramCache]: Analyzing trace with hash -526663439, now seen corresponding path program 9 times [2020-10-28 09:20:20,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:20:20,253 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [823280661] [2020-10-28 09:20:20,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:20:20,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:20,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:20,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:21,646 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:21,646 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-28 09:20:21,646 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:20:21,646 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1379 [2020-10-28 09:20:21,646 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:21,647 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:21,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-28 09:20:21,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:20:21,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-28 09:20:21,647 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:21,853 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:20:21,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:21,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:21,859 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:21,859 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:20:21,859 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:20:21,860 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:20:21,860 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:21,860 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:21,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:20:21,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:20:21,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:20:21,860 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:21,865 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-10-28 09:20:21,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:21,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:21,869 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:21,869 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:20:21,869 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:20:21,869 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:20:21,870 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:21,870 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:21,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:20:21,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:20:21,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:20:21,870 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:21,879 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 2 proven. 169 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 09:20:21,879 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [823280661] [2020-10-28 09:20:21,881 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:20:21,882 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-28 09:20:21,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882212104] [2020-10-28 09:20:21,882 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-28 09:20:21,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:20:21,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-28 09:20:21,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-28 09:20:21,884 INFO L87 Difference]: Start difference. First operand 119 states and 133 transitions. Second operand 17 states. [2020-10-28 09:20:22,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:20:22,316 INFO L93 Difference]: Finished difference Result 214 states and 244 transitions. [2020-10-28 09:20:22,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-28 09:20:22,316 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 50 [2020-10-28 09:20:22,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:20:22,318 INFO L225 Difference]: With dead ends: 214 [2020-10-28 09:20:22,318 INFO L226 Difference]: Without dead ends: 128 [2020-10-28 09:20:22,319 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=139, Invalid=167, Unknown=0, NotChecked=0, Total=306 [2020-10-28 09:20:22,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-28 09:20:22,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 126. [2020-10-28 09:20:22,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-10-28 09:20:22,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 141 transitions. [2020-10-28 09:20:22,331 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 141 transitions. Word has length 50 [2020-10-28 09:20:22,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:20:22,332 INFO L481 AbstractCegarLoop]: Abstraction has 126 states and 141 transitions. [2020-10-28 09:20:22,332 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-28 09:20:22,332 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 141 transitions. [2020-10-28 09:20:22,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-28 09:20:22,333 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:20:22,333 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:20:22,333 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-28 09:20:22,333 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:20:22,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:20:22,334 INFO L82 PathProgramCache]: Analyzing trace with hash -803549677, now seen corresponding path program 10 times [2020-10-28 09:20:22,334 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:20:22,334 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [150556013] [2020-10-28 09:20:22,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:20:22,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:22,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:22,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:23,550 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:23,550 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-28 09:20:23,550 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:20:23,550 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1198 [2020-10-28 09:20:23,551 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:23,551 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:23,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-28 09:20:23,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:20:23,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-28 09:20:23,551 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:23,852 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:20:23,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:23,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:23,859 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:23,859 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:20:23,859 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:20:23,860 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 09:20:23,860 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:23,860 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:23,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:20:23,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:20:23,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:20:23,860 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:23,863 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-10-28 09:20:23,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:23,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:23,866 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:23,866 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:20:23,866 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:20:23,867 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:20:23,867 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:23,867 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:23,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:20:23,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:20:23,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:20:23,867 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:23,873 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 2 proven. 196 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 09:20:23,873 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [150556013] [2020-10-28 09:20:23,873 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:20:23,873 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-28 09:20:23,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147764999] [2020-10-28 09:20:23,874 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-28 09:20:23,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:20:23,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-28 09:20:23,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-28 09:20:23,875 INFO L87 Difference]: Start difference. First operand 126 states and 141 transitions. Second operand 18 states. [2020-10-28 09:20:24,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:20:24,296 INFO L93 Difference]: Finished difference Result 226 states and 258 transitions. [2020-10-28 09:20:24,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-28 09:20:24,296 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 52 [2020-10-28 09:20:24,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:20:24,298 INFO L225 Difference]: With dead ends: 226 [2020-10-28 09:20:24,298 INFO L226 Difference]: Without dead ends: 135 [2020-10-28 09:20:24,299 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=156, Invalid=186, Unknown=0, NotChecked=0, Total=342 [2020-10-28 09:20:24,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-10-28 09:20:24,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 133. [2020-10-28 09:20:24,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-10-28 09:20:24,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 149 transitions. [2020-10-28 09:20:24,308 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 149 transitions. Word has length 52 [2020-10-28 09:20:24,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:20:24,308 INFO L481 AbstractCegarLoop]: Abstraction has 133 states and 149 transitions. [2020-10-28 09:20:24,308 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-28 09:20:24,308 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 149 transitions. [2020-10-28 09:20:24,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-28 09:20:24,309 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:20:24,309 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:20:24,309 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-28 09:20:24,310 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:20:24,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:20:24,310 INFO L82 PathProgramCache]: Analyzing trace with hash -603252043, now seen corresponding path program 11 times [2020-10-28 09:20:24,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:20:24,310 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1432940303] [2020-10-28 09:20:24,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:20:24,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:24,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:24,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:25,572 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:25,573 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-28 09:20:25,573 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:20:25,573 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1246 [2020-10-28 09:20:25,573 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:25,573 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:25,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-28 09:20:25,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:20:25,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-28 09:20:25,574 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:25,830 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:20:25,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:25,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:25,837 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:25,837 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:20:25,837 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:20:25,838 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 09:20:25,838 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:25,838 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:25,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:20:25,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:20:25,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:20:25,839 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:25,842 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-10-28 09:20:25,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:25,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:25,844 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:25,845 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:20:25,845 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:20:25,845 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:20:25,845 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:25,845 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:25,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:20:25,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:20:25,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:20:25,846 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:25,851 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 2 proven. 225 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 09:20:25,852 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1432940303] [2020-10-28 09:20:25,852 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:20:25,852 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-28 09:20:25,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055126289] [2020-10-28 09:20:25,858 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-28 09:20:25,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:20:25,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-28 09:20:25,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-28 09:20:25,860 INFO L87 Difference]: Start difference. First operand 133 states and 149 transitions. Second operand 19 states. [2020-10-28 09:20:26,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:20:26,360 INFO L93 Difference]: Finished difference Result 238 states and 272 transitions. [2020-10-28 09:20:26,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-28 09:20:26,360 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 54 [2020-10-28 09:20:26,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:20:26,362 INFO L225 Difference]: With dead ends: 238 [2020-10-28 09:20:26,362 INFO L226 Difference]: Without dead ends: 142 [2020-10-28 09:20:26,363 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=174, Invalid=206, Unknown=0, NotChecked=0, Total=380 [2020-10-28 09:20:26,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-10-28 09:20:26,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 140. [2020-10-28 09:20:26,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-28 09:20:26,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 157 transitions. [2020-10-28 09:20:26,372 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 157 transitions. Word has length 54 [2020-10-28 09:20:26,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:20:26,372 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 157 transitions. [2020-10-28 09:20:26,373 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-28 09:20:26,373 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 157 transitions. [2020-10-28 09:20:26,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-28 09:20:26,373 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:20:26,373 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:20:26,374 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-28 09:20:26,374 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:20:26,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:20:26,374 INFO L82 PathProgramCache]: Analyzing trace with hash -1390754089, now seen corresponding path program 12 times [2020-10-28 09:20:26,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:20:26,375 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2097524654] [2020-10-28 09:20:26,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:20:26,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:26,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:26,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:27,805 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:27,806 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-28 09:20:27,806 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:20:27,806 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1416 [2020-10-28 09:20:27,806 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:27,806 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:27,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-28 09:20:27,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:20:27,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-28 09:20:27,807 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:28,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:20:28,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:28,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:28,081 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:28,082 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:20:28,082 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:20:28,082 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 09:20:28,082 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:28,082 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:28,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:20:28,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:20:28,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:20:28,083 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:28,088 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-10-28 09:20:28,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:28,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:28,090 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:28,091 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:20:28,091 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:20:28,091 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:20:28,091 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:28,091 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:28,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:20:28,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:20:28,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:20:28,092 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:28,100 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 2 proven. 256 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 09:20:28,100 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2097524654] [2020-10-28 09:20:28,100 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:20:28,101 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-28 09:20:28,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079776572] [2020-10-28 09:20:28,102 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-28 09:20:28,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:20:28,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-28 09:20:28,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-28 09:20:28,105 INFO L87 Difference]: Start difference. First operand 140 states and 157 transitions. Second operand 20 states. [2020-10-28 09:20:28,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:20:28,664 INFO L93 Difference]: Finished difference Result 250 states and 286 transitions. [2020-10-28 09:20:28,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-28 09:20:28,665 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 56 [2020-10-28 09:20:28,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:20:28,666 INFO L225 Difference]: With dead ends: 250 [2020-10-28 09:20:28,666 INFO L226 Difference]: Without dead ends: 149 [2020-10-28 09:20:28,667 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=193, Invalid=227, Unknown=0, NotChecked=0, Total=420 [2020-10-28 09:20:28,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-10-28 09:20:28,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 147. [2020-10-28 09:20:28,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-10-28 09:20:28,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 165 transitions. [2020-10-28 09:20:28,679 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 165 transitions. Word has length 56 [2020-10-28 09:20:28,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:20:28,680 INFO L481 AbstractCegarLoop]: Abstraction has 147 states and 165 transitions. [2020-10-28 09:20:28,680 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-28 09:20:28,680 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 165 transitions. [2020-10-28 09:20:28,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-28 09:20:28,681 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:20:28,681 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:20:28,681 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-28 09:20:28,681 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:20:28,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:20:28,682 INFO L82 PathProgramCache]: Analyzing trace with hash 2028991097, now seen corresponding path program 13 times [2020-10-28 09:20:28,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:20:28,682 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [344787748] [2020-10-28 09:20:28,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:20:28,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:28,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:29,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:30,246 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:30,246 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-28 09:20:30,247 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:20:30,247 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1549 [2020-10-28 09:20:30,247 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:30,247 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:30,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-28 09:20:30,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:20:30,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-28 09:20:30,248 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:30,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:20:30,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:30,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:30,572 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:30,572 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:20:30,572 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:20:30,573 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:20:30,573 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:30,573 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:30,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:20:30,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:20:30,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:20:30,574 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:30,576 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-10-28 09:20:30,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:30,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:30,579 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:30,579 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:20:30,579 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:20:30,579 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:20:30,579 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:30,580 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:30,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:20:30,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:20:30,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:20:30,580 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:30,587 INFO L134 CoverageAnalysis]: Checked inductivity of 293 backedges. 2 proven. 289 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 09:20:30,587 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [344787748] [2020-10-28 09:20:30,588 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:20:30,588 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-28 09:20:30,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72701580] [2020-10-28 09:20:30,588 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-28 09:20:30,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:20:30,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-28 09:20:30,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-28 09:20:30,590 INFO L87 Difference]: Start difference. First operand 147 states and 165 transitions. Second operand 21 states. [2020-10-28 09:20:31,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:20:31,171 INFO L93 Difference]: Finished difference Result 262 states and 300 transitions. [2020-10-28 09:20:31,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-28 09:20:31,172 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 58 [2020-10-28 09:20:31,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:20:31,173 INFO L225 Difference]: With dead ends: 262 [2020-10-28 09:20:31,173 INFO L226 Difference]: Without dead ends: 156 [2020-10-28 09:20:31,174 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=213, Invalid=249, Unknown=0, NotChecked=0, Total=462 [2020-10-28 09:20:31,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2020-10-28 09:20:31,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 154. [2020-10-28 09:20:31,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-10-28 09:20:31,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 173 transitions. [2020-10-28 09:20:31,184 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 173 transitions. Word has length 58 [2020-10-28 09:20:31,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:20:31,185 INFO L481 AbstractCegarLoop]: Abstraction has 154 states and 173 transitions. [2020-10-28 09:20:31,185 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-28 09:20:31,185 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 173 transitions. [2020-10-28 09:20:31,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-28 09:20:31,192 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:20:31,192 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:20:31,192 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-28 09:20:31,192 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:20:31,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:20:31,193 INFO L82 PathProgramCache]: Analyzing trace with hash -1540833893, now seen corresponding path program 14 times [2020-10-28 09:20:31,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:20:31,194 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [834815171] [2020-10-28 09:20:31,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:20:31,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:31,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:31,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:32,537 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:32,538 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-28 09:20:32,538 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:20:32,538 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1323 [2020-10-28 09:20:32,538 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:32,538 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:32,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-28 09:20:32,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:20:32,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-28 09:20:32,539 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:32,906 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:20:32,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:32,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:32,912 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:32,912 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:20:32,912 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:20:32,913 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:20:32,913 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:32,913 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:32,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:20:32,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:20:32,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:20:32,914 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:32,916 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-10-28 09:20:32,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:32,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:32,919 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:32,919 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:20:32,919 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:20:32,919 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:20:32,919 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:32,919 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:32,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:20:32,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:20:32,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:20:32,920 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:32,926 INFO L134 CoverageAnalysis]: Checked inductivity of 328 backedges. 2 proven. 324 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 09:20:32,926 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [834815171] [2020-10-28 09:20:32,927 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:20:32,927 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-28 09:20:32,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564400933] [2020-10-28 09:20:32,927 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-28 09:20:32,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:20:32,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-28 09:20:32,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-28 09:20:32,929 INFO L87 Difference]: Start difference. First operand 154 states and 173 transitions. Second operand 22 states. [2020-10-28 09:20:33,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:20:33,472 INFO L93 Difference]: Finished difference Result 274 states and 314 transitions. [2020-10-28 09:20:33,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-28 09:20:33,473 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 60 [2020-10-28 09:20:33,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:20:33,475 INFO L225 Difference]: With dead ends: 274 [2020-10-28 09:20:33,475 INFO L226 Difference]: Without dead ends: 163 [2020-10-28 09:20:33,477 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=234, Invalid=272, Unknown=0, NotChecked=0, Total=506 [2020-10-28 09:20:33,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-10-28 09:20:33,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 161. [2020-10-28 09:20:33,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-10-28 09:20:33,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 181 transitions. [2020-10-28 09:20:33,496 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 181 transitions. Word has length 60 [2020-10-28 09:20:33,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:20:33,496 INFO L481 AbstractCegarLoop]: Abstraction has 161 states and 181 transitions. [2020-10-28 09:20:33,497 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-28 09:20:33,497 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 181 transitions. [2020-10-28 09:20:33,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-28 09:20:33,497 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:20:33,497 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:20:33,498 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-28 09:20:33,498 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:20:33,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:20:33,498 INFO L82 PathProgramCache]: Analyzing trace with hash -463779779, now seen corresponding path program 15 times [2020-10-28 09:20:33,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:20:33,499 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [112539519] [2020-10-28 09:20:33,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:20:33,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:33,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:33,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:35,129 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:35,130 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-28 09:20:35,130 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:20:35,130 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1616 [2020-10-28 09:20:35,130 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:35,130 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:35,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-28 09:20:35,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:20:35,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-28 09:20:35,131 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:35,552 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:20:35,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:35,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:35,559 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:35,559 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:20:35,560 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:20:35,560 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 09:20:35,560 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:35,560 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:35,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:20:35,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:20:35,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:20:35,561 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:20:35,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-10-28 09:20:35,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:35,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:35,569 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:35,570 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:20:35,570 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:20:35,570 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:20:35,570 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:35,571 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:35,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:20:35,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:20:35,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:20:35,572 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:20:35,614 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 2 proven. 361 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 09:20:35,614 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [112539519] [2020-10-28 09:20:35,614 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:20:35,614 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-28 09:20:35,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336785221] [2020-10-28 09:20:35,616 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-28 09:20:35,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:20:35,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-28 09:20:35,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-28 09:20:35,624 INFO L87 Difference]: Start difference. First operand 161 states and 181 transitions. Second operand 23 states. [2020-10-28 09:20:36,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:20:36,343 INFO L93 Difference]: Finished difference Result 286 states and 328 transitions. [2020-10-28 09:20:36,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-28 09:20:36,346 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 62 [2020-10-28 09:20:36,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:20:36,349 INFO L225 Difference]: With dead ends: 286 [2020-10-28 09:20:36,349 INFO L226 Difference]: Without dead ends: 170 [2020-10-28 09:20:36,350 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=256, Invalid=296, Unknown=0, NotChecked=0, Total=552 [2020-10-28 09:20:36,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-10-28 09:20:36,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 168. [2020-10-28 09:20:36,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-10-28 09:20:36,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 189 transitions. [2020-10-28 09:20:36,367 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 189 transitions. Word has length 62 [2020-10-28 09:20:36,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:20:36,368 INFO L481 AbstractCegarLoop]: Abstraction has 168 states and 189 transitions. [2020-10-28 09:20:36,368 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-28 09:20:36,368 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 189 transitions. [2020-10-28 09:20:36,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-28 09:20:36,368 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:20:36,369 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:20:36,369 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-28 09:20:36,369 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:20:36,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:20:36,369 INFO L82 PathProgramCache]: Analyzing trace with hash -501894561, now seen corresponding path program 16 times [2020-10-28 09:20:36,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:20:36,375 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [148336038] [2020-10-28 09:20:36,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:20:36,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:36,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:36,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:38,119 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:38,119 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-28 09:20:38,119 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:20:38,119 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1727 [2020-10-28 09:20:38,119 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:38,120 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:38,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-28 09:20:38,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:20:38,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-28 09:20:38,120 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:38,654 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:20:38,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:38,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:38,663 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:38,663 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:20:38,663 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:20:38,663 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:20:38,663 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:38,663 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:38,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:20:38,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:20:38,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:20:38,664 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:38,667 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-10-28 09:20:38,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:38,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:38,669 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:38,669 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:20:38,669 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:20:38,670 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:20:38,670 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:38,670 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:38,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:20:38,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:20:38,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:20:38,671 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:20:38,683 INFO L134 CoverageAnalysis]: Checked inductivity of 404 backedges. 2 proven. 400 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 09:20:38,684 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [148336038] [2020-10-28 09:20:38,688 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:20:38,689 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-28 09:20:38,694 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000723864] [2020-10-28 09:20:38,694 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-28 09:20:38,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:20:38,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-28 09:20:38,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-28 09:20:38,697 INFO L87 Difference]: Start difference. First operand 168 states and 189 transitions. Second operand 24 states. [2020-10-28 09:20:39,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:20:39,460 INFO L93 Difference]: Finished difference Result 298 states and 342 transitions. [2020-10-28 09:20:39,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-28 09:20:39,461 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 64 [2020-10-28 09:20:39,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:20:39,463 INFO L225 Difference]: With dead ends: 298 [2020-10-28 09:20:39,463 INFO L226 Difference]: Without dead ends: 177 [2020-10-28 09:20:39,465 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=279, Invalid=321, Unknown=0, NotChecked=0, Total=600 [2020-10-28 09:20:39,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-10-28 09:20:39,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 175. [2020-10-28 09:20:39,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2020-10-28 09:20:39,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 197 transitions. [2020-10-28 09:20:39,476 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 197 transitions. Word has length 64 [2020-10-28 09:20:39,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:20:39,476 INFO L481 AbstractCegarLoop]: Abstraction has 175 states and 197 transitions. [2020-10-28 09:20:39,476 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-28 09:20:39,476 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 197 transitions. [2020-10-28 09:20:39,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-28 09:20:39,477 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:20:39,477 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:20:39,477 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-28 09:20:39,477 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:20:39,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:20:39,478 INFO L82 PathProgramCache]: Analyzing trace with hash 1524505601, now seen corresponding path program 17 times [2020-10-28 09:20:39,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:20:39,478 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1337182261] [2020-10-28 09:20:39,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:20:39,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:39,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:39,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:40,560 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:40,560 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-28 09:20:40,560 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:20:40,560 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1066 [2020-10-28 09:20:40,560 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:40,560 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:40,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-28 09:20:40,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:20:40,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-28 09:20:40,561 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:41,108 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:20:41,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:41,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:41,114 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:41,115 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:20:41,115 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:20:41,115 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 09:20:41,116 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:41,116 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:41,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:20:41,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:20:41,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:20:41,117 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:20:41,126 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-10-28 09:20:41,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:41,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:41,129 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:41,130 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:20:41,130 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:20:41,130 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:20:41,130 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:41,131 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:41,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:20:41,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:20:41,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:20:41,131 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:20:41,144 INFO L134 CoverageAnalysis]: Checked inductivity of 445 backedges. 2 proven. 441 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 09:20:41,144 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1337182261] [2020-10-28 09:20:41,145 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:20:41,145 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-28 09:20:41,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885931530] [2020-10-28 09:20:41,146 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-28 09:20:41,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:20:41,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-28 09:20:41,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-28 09:20:41,147 INFO L87 Difference]: Start difference. First operand 175 states and 197 transitions. Second operand 25 states. [2020-10-28 09:20:41,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:20:41,971 INFO L93 Difference]: Finished difference Result 310 states and 356 transitions. [2020-10-28 09:20:41,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-28 09:20:41,971 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 66 [2020-10-28 09:20:41,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:20:41,974 INFO L225 Difference]: With dead ends: 310 [2020-10-28 09:20:41,974 INFO L226 Difference]: Without dead ends: 184 [2020-10-28 09:20:41,976 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=303, Invalid=347, Unknown=0, NotChecked=0, Total=650 [2020-10-28 09:20:41,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2020-10-28 09:20:41,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 182. [2020-10-28 09:20:41,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2020-10-28 09:20:41,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 205 transitions. [2020-10-28 09:20:41,988 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 205 transitions. Word has length 66 [2020-10-28 09:20:41,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:20:41,988 INFO L481 AbstractCegarLoop]: Abstraction has 182 states and 205 transitions. [2020-10-28 09:20:41,988 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-28 09:20:41,988 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 205 transitions. [2020-10-28 09:20:41,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-28 09:20:41,989 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:20:41,989 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:20:41,989 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-28 09:20:41,989 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:20:41,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:20:41,990 INFO L82 PathProgramCache]: Analyzing trace with hash -1020091101, now seen corresponding path program 18 times [2020-10-28 09:20:41,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:20:41,990 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1131785882] [2020-10-28 09:20:41,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:20:42,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:42,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:42,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:43,219 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:43,220 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-28 09:20:43,220 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:20:43,220 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1214 [2020-10-28 09:20:43,220 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:43,220 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:43,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-28 09:20:43,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:20:43,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-28 09:20:43,220 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:43,670 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:20:43,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:43,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:43,675 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:43,675 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:20:43,676 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:20:43,676 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:20:43,676 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:43,676 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:43,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:20:43,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:20:43,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:20:43,677 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:43,679 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-10-28 09:20:43,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:43,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:43,681 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:43,681 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:20:43,681 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:20:43,682 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:20:43,682 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:43,682 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:43,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:20:43,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:20:43,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:20:43,682 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:43,691 INFO L134 CoverageAnalysis]: Checked inductivity of 488 backedges. 2 proven. 484 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 09:20:43,691 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1131785882] [2020-10-28 09:20:43,691 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:20:43,691 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-28 09:20:43,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274563616] [2020-10-28 09:20:43,692 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-28 09:20:43,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:20:43,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-28 09:20:43,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-28 09:20:43,693 INFO L87 Difference]: Start difference. First operand 182 states and 205 transitions. Second operand 26 states. [2020-10-28 09:20:44,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:20:44,427 INFO L93 Difference]: Finished difference Result 322 states and 370 transitions. [2020-10-28 09:20:44,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-28 09:20:44,428 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 68 [2020-10-28 09:20:44,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:20:44,430 INFO L225 Difference]: With dead ends: 322 [2020-10-28 09:20:44,430 INFO L226 Difference]: Without dead ends: 191 [2020-10-28 09:20:44,432 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=328, Invalid=374, Unknown=0, NotChecked=0, Total=702 [2020-10-28 09:20:44,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2020-10-28 09:20:44,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 189. [2020-10-28 09:20:44,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2020-10-28 09:20:44,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 213 transitions. [2020-10-28 09:20:44,446 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 213 transitions. Word has length 68 [2020-10-28 09:20:44,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:20:44,446 INFO L481 AbstractCegarLoop]: Abstraction has 189 states and 213 transitions. [2020-10-28 09:20:44,446 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-28 09:20:44,446 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 213 transitions. [2020-10-28 09:20:44,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-28 09:20:44,447 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:20:44,447 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:20:44,447 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-28 09:20:44,447 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:20:44,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:20:44,448 INFO L82 PathProgramCache]: Analyzing trace with hash 1753836997, now seen corresponding path program 19 times [2020-10-28 09:20:44,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:20:44,448 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [777299154] [2020-10-28 09:20:44,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:20:44,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:44,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:44,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:46,183 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:46,183 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-28 09:20:46,183 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:20:46,183 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1718 [2020-10-28 09:20:46,183 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:46,183 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:46,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-28 09:20:46,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:20:46,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-28 09:20:46,184 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:46,707 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:20:46,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:46,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:46,716 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:46,716 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:20:46,716 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:20:46,716 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:20:46,716 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:46,716 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:46,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:20:46,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:20:46,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:20:46,717 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:46,719 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-10-28 09:20:46,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:46,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:46,721 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:46,721 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:20:46,721 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:20:46,721 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:20:46,721 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:46,721 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:46,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:20:46,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:20:46,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:20:46,722 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:46,728 INFO L134 CoverageAnalysis]: Checked inductivity of 533 backedges. 2 proven. 529 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 09:20:46,728 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [777299154] [2020-10-28 09:20:46,728 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:20:46,728 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-28 09:20:46,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330208000] [2020-10-28 09:20:46,729 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-28 09:20:46,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:20:46,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-28 09:20:46,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-28 09:20:46,730 INFO L87 Difference]: Start difference. First operand 189 states and 213 transitions. Second operand 27 states. [2020-10-28 09:20:47,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:20:47,629 INFO L93 Difference]: Finished difference Result 334 states and 384 transitions. [2020-10-28 09:20:47,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-28 09:20:47,630 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 70 [2020-10-28 09:20:47,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:20:47,632 INFO L225 Difference]: With dead ends: 334 [2020-10-28 09:20:47,632 INFO L226 Difference]: Without dead ends: 198 [2020-10-28 09:20:47,633 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=354, Invalid=402, Unknown=0, NotChecked=0, Total=756 [2020-10-28 09:20:47,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2020-10-28 09:20:47,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 196. [2020-10-28 09:20:47,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2020-10-28 09:20:47,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 221 transitions. [2020-10-28 09:20:47,646 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 221 transitions. Word has length 70 [2020-10-28 09:20:47,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:20:47,647 INFO L481 AbstractCegarLoop]: Abstraction has 196 states and 221 transitions. [2020-10-28 09:20:47,647 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-28 09:20:47,647 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 221 transitions. [2020-10-28 09:20:47,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-28 09:20:47,648 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:20:47,648 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:20:47,648 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-28 09:20:47,648 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:20:47,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:20:47,649 INFO L82 PathProgramCache]: Analyzing trace with hash 324048359, now seen corresponding path program 20 times [2020-10-28 09:20:47,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:20:47,649 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1502806791] [2020-10-28 09:20:47,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:20:47,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:47,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:48,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:49,574 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:49,574 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-28 09:20:49,574 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:20:49,574 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1907 [2020-10-28 09:20:49,574 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:49,574 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:49,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-28 09:20:49,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:20:49,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-28 09:20:49,574 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:50,148 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:20:50,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:50,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:50,153 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:50,153 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:20:50,153 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:20:50,154 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:20:50,154 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:50,154 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:50,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:20:50,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:20:50,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:20:50,154 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:50,156 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-10-28 09:20:50,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:50,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:50,158 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:50,158 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:20:50,158 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:20:50,159 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:20:50,159 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:50,159 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:50,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:20:50,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:20:50,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:20:50,159 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:50,165 INFO L134 CoverageAnalysis]: Checked inductivity of 580 backedges. 2 proven. 576 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 09:20:50,166 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1502806791] [2020-10-28 09:20:50,166 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:20:50,166 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-28 09:20:50,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669086113] [2020-10-28 09:20:50,166 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-28 09:20:50,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:20:50,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-28 09:20:50,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-28 09:20:50,167 INFO L87 Difference]: Start difference. First operand 196 states and 221 transitions. Second operand 28 states. [2020-10-28 09:20:51,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:20:51,109 INFO L93 Difference]: Finished difference Result 346 states and 398 transitions. [2020-10-28 09:20:51,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-28 09:20:51,110 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 72 [2020-10-28 09:20:51,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:20:51,112 INFO L225 Difference]: With dead ends: 346 [2020-10-28 09:20:51,112 INFO L226 Difference]: Without dead ends: 205 [2020-10-28 09:20:51,113 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=381, Invalid=431, Unknown=0, NotChecked=0, Total=812 [2020-10-28 09:20:51,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2020-10-28 09:20:51,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 203. [2020-10-28 09:20:51,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2020-10-28 09:20:51,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 229 transitions. [2020-10-28 09:20:51,143 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 229 transitions. Word has length 72 [2020-10-28 09:20:51,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:20:51,145 INFO L481 AbstractCegarLoop]: Abstraction has 203 states and 229 transitions. [2020-10-28 09:20:51,145 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-28 09:20:51,145 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 229 transitions. [2020-10-28 09:20:51,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-28 09:20:51,145 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:20:51,146 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:20:51,146 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-28 09:20:51,146 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:20:51,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:20:51,146 INFO L82 PathProgramCache]: Analyzing trace with hash 686701961, now seen corresponding path program 21 times [2020-10-28 09:20:51,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:20:51,147 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [755995267] [2020-10-28 09:20:51,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:20:51,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:51,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:51,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:52,575 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:52,575 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-28 09:20:52,575 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:20:52,575 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1408 [2020-10-28 09:20:52,575 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:52,575 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:52,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-28 09:20:52,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:20:52,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-28 09:20:52,576 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:53,171 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:20:53,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:53,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:53,176 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:53,176 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:20:53,176 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:20:53,176 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:20:53,176 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:53,176 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:53,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:20:53,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:20:53,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:20:53,176 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:53,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-10-28 09:20:53,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:53,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:53,181 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:53,181 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:20:53,181 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:20:53,181 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:20:53,181 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:53,181 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:53,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:20:53,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:20:53,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:20:53,182 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:53,188 INFO L134 CoverageAnalysis]: Checked inductivity of 629 backedges. 2 proven. 625 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 09:20:53,188 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [755995267] [2020-10-28 09:20:53,188 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:20:53,188 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-28 09:20:53,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247054250] [2020-10-28 09:20:53,189 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-28 09:20:53,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:20:53,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-28 09:20:53,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-28 09:20:53,190 INFO L87 Difference]: Start difference. First operand 203 states and 229 transitions. Second operand 29 states. [2020-10-28 09:20:54,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:20:54,129 INFO L93 Difference]: Finished difference Result 358 states and 412 transitions. [2020-10-28 09:20:54,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-28 09:20:54,130 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 74 [2020-10-28 09:20:54,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:20:54,132 INFO L225 Difference]: With dead ends: 358 [2020-10-28 09:20:54,132 INFO L226 Difference]: Without dead ends: 212 [2020-10-28 09:20:54,133 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=409, Invalid=461, Unknown=0, NotChecked=0, Total=870 [2020-10-28 09:20:54,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2020-10-28 09:20:54,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 210. [2020-10-28 09:20:54,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 210 states. [2020-10-28 09:20:54,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 237 transitions. [2020-10-28 09:20:54,151 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 237 transitions. Word has length 74 [2020-10-28 09:20:54,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:20:54,151 INFO L481 AbstractCegarLoop]: Abstraction has 210 states and 237 transitions. [2020-10-28 09:20:54,151 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-28 09:20:54,152 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 237 transitions. [2020-10-28 09:20:54,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-28 09:20:54,152 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:20:54,152 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:20:54,153 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-28 09:20:54,153 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:20:54,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:20:54,154 INFO L82 PathProgramCache]: Analyzing trace with hash 1304462507, now seen corresponding path program 22 times [2020-10-28 09:20:54,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:20:54,155 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [232664180] [2020-10-28 09:20:54,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:20:54,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:54,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:54,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:55,541 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:55,542 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-28 09:20:55,542 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:20:55,542 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1372 [2020-10-28 09:20:55,542 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:55,542 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:55,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-28 09:20:55,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:20:55,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-28 09:20:55,542 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:56,150 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:20:56,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:56,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:56,156 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:56,157 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:20:56,157 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:20:56,157 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:20:56,157 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:56,157 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:56,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:20:56,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:20:56,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:20:56,157 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:56,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-10-28 09:20:56,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:56,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:56,161 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:56,161 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:20:56,161 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:20:56,162 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:20:56,162 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:56,162 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:56,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:20:56,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:20:56,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:20:56,162 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:56,171 INFO L134 CoverageAnalysis]: Checked inductivity of 680 backedges. 2 proven. 676 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 09:20:56,171 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [232664180] [2020-10-28 09:20:56,171 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:20:56,171 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-28 09:20:56,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384030168] [2020-10-28 09:20:56,172 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-28 09:20:56,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:20:56,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-28 09:20:56,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-28 09:20:56,173 INFO L87 Difference]: Start difference. First operand 210 states and 237 transitions. Second operand 30 states. [2020-10-28 09:20:57,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:20:57,163 INFO L93 Difference]: Finished difference Result 370 states and 426 transitions. [2020-10-28 09:20:57,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-28 09:20:57,164 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 76 [2020-10-28 09:20:57,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:20:57,166 INFO L225 Difference]: With dead ends: 370 [2020-10-28 09:20:57,167 INFO L226 Difference]: Without dead ends: 219 [2020-10-28 09:20:57,168 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=438, Invalid=492, Unknown=0, NotChecked=0, Total=930 [2020-10-28 09:20:57,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2020-10-28 09:20:57,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 217. [2020-10-28 09:20:57,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217 states. [2020-10-28 09:20:57,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 245 transitions. [2020-10-28 09:20:57,181 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 245 transitions. Word has length 76 [2020-10-28 09:20:57,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:20:57,181 INFO L481 AbstractCegarLoop]: Abstraction has 217 states and 245 transitions. [2020-10-28 09:20:57,181 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-28 09:20:57,181 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 245 transitions. [2020-10-28 09:20:57,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-28 09:20:57,182 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:20:57,182 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:20:57,182 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-28 09:20:57,182 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:20:57,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:20:57,183 INFO L82 PathProgramCache]: Analyzing trace with hash -2028106931, now seen corresponding path program 23 times [2020-10-28 09:20:57,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:20:57,183 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [752507058] [2020-10-28 09:20:57,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:20:57,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:57,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:57,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:59,658 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:59,658 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-28 09:20:59,658 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:20:59,658 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2459 [2020-10-28 09:20:59,658 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:59,658 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:59,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-28 09:20:59,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:20:59,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-28 09:20:59,659 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:21:00,316 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:21:00,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:21:00,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:00,321 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:21:00,322 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:21:00,322 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:21:00,322 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:21:00,322 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:21:00,322 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:21:00,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:21:00,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:21:00,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:21:00,322 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:21:00,324 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-10-28 09:21:00,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:21:00,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:00,326 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:21:00,326 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:21:00,326 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:21:00,326 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:21:00,326 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:21:00,326 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:21:00,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:21:00,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:21:00,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:21:00,327 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:21:00,333 INFO L134 CoverageAnalysis]: Checked inductivity of 733 backedges. 2 proven. 729 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 09:21:00,334 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [752507058] [2020-10-28 09:21:00,334 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:21:00,334 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-28 09:21:00,334 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372519757] [2020-10-28 09:21:00,335 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-28 09:21:00,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:21:00,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-28 09:21:00,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-28 09:21:00,336 INFO L87 Difference]: Start difference. First operand 217 states and 245 transitions. Second operand 31 states. [2020-10-28 09:21:01,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:21:01,407 INFO L93 Difference]: Finished difference Result 382 states and 440 transitions. [2020-10-28 09:21:01,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-28 09:21:01,408 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 78 [2020-10-28 09:21:01,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:21:01,412 INFO L225 Difference]: With dead ends: 382 [2020-10-28 09:21:01,412 INFO L226 Difference]: Without dead ends: 226 [2020-10-28 09:21:01,414 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=468, Invalid=524, Unknown=0, NotChecked=0, Total=992 [2020-10-28 09:21:01,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2020-10-28 09:21:01,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 224. [2020-10-28 09:21:01,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 224 states. [2020-10-28 09:21:01,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 253 transitions. [2020-10-28 09:21:01,442 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 253 transitions. Word has length 78 [2020-10-28 09:21:01,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:21:01,442 INFO L481 AbstractCegarLoop]: Abstraction has 224 states and 253 transitions. [2020-10-28 09:21:01,442 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-28 09:21:01,442 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 253 transitions. [2020-10-28 09:21:01,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-28 09:21:01,443 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:21:01,443 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:21:01,443 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-28 09:21:01,443 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:21:01,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:21:01,444 INFO L82 PathProgramCache]: Analyzing trace with hash -581734033, now seen corresponding path program 24 times [2020-10-28 09:21:01,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:21:01,444 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1479922894] [2020-10-28 09:21:01,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:21:01,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:21:01,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:01,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:03,523 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:21:03,523 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-28 09:21:03,524 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:21:03,524 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2051 [2020-10-28 09:21:03,524 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:21:03,524 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:21:03,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-28 09:21:03,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:21:03,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-28 09:21:03,524 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:21:04,225 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:21:04,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:21:04,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:04,230 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:21:04,230 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:21:04,230 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:21:04,231 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:21:04,231 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:21:04,231 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:21:04,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:21:04,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:21:04,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:21:04,231 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:21:04,234 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-10-28 09:21:04,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:21:04,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:04,238 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:21:04,238 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:21:04,238 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:21:04,238 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:21:04,239 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:21:04,239 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:21:04,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:21:04,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:21:04,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:21:04,239 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:21:04,248 INFO L134 CoverageAnalysis]: Checked inductivity of 788 backedges. 2 proven. 784 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 09:21:04,248 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1479922894] [2020-10-28 09:21:04,248 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:21:04,248 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-28 09:21:04,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880725919] [2020-10-28 09:21:04,249 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-28 09:21:04,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:21:04,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-28 09:21:04,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-28 09:21:04,250 INFO L87 Difference]: Start difference. First operand 224 states and 253 transitions. Second operand 32 states. [2020-10-28 09:21:05,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:21:05,346 INFO L93 Difference]: Finished difference Result 394 states and 454 transitions. [2020-10-28 09:21:05,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-28 09:21:05,346 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 80 [2020-10-28 09:21:05,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:21:05,349 INFO L225 Difference]: With dead ends: 394 [2020-10-28 09:21:05,349 INFO L226 Difference]: Without dead ends: 233 [2020-10-28 09:21:05,351 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=499, Invalid=557, Unknown=0, NotChecked=0, Total=1056 [2020-10-28 09:21:05,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-10-28 09:21:05,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 231. [2020-10-28 09:21:05,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 231 states. [2020-10-28 09:21:05,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 261 transitions. [2020-10-28 09:21:05,368 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 261 transitions. Word has length 80 [2020-10-28 09:21:05,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:21:05,368 INFO L481 AbstractCegarLoop]: Abstraction has 231 states and 261 transitions. [2020-10-28 09:21:05,368 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-28 09:21:05,368 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 261 transitions. [2020-10-28 09:21:05,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-28 09:21:05,369 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:21:05,369 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:21:05,369 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-28 09:21:05,370 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:21:05,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:21:05,370 INFO L82 PathProgramCache]: Analyzing trace with hash 2108184337, now seen corresponding path program 25 times [2020-10-28 09:21:05,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:21:05,370 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [300157955] [2020-10-28 09:21:05,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:21:05,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:21:05,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:05,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:08,443 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:21:08,444 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-28 09:21:08,444 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:21:08,444 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3054 [2020-10-28 09:21:08,444 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:21:08,444 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:21:08,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-28 09:21:08,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:21:08,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-28 09:21:08,444 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:21:09,183 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:21:09,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:21:09,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:09,189 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:21:09,189 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:21:09,190 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:21:09,190 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:21:09,190 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:21:09,190 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:21:09,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:21:09,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:21:09,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:21:09,191 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:21:09,193 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-10-28 09:21:09,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:21:09,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:09,195 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:21:09,195 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:21:09,195 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:21:09,195 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:21:09,196 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:21:09,196 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:21:09,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:21:09,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:21:09,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:21:09,196 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:21:09,207 INFO L134 CoverageAnalysis]: Checked inductivity of 845 backedges. 2 proven. 841 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 09:21:09,207 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [300157955] [2020-10-28 09:21:09,207 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:21:09,207 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-28 09:21:09,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920825058] [2020-10-28 09:21:09,208 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-28 09:21:09,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:21:09,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-28 09:21:09,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-28 09:21:09,209 INFO L87 Difference]: Start difference. First operand 231 states and 261 transitions. Second operand 33 states. [2020-10-28 09:21:10,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:21:10,121 INFO L93 Difference]: Finished difference Result 406 states and 468 transitions. [2020-10-28 09:21:10,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-28 09:21:10,122 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 82 [2020-10-28 09:21:10,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:21:10,124 INFO L225 Difference]: With dead ends: 406 [2020-10-28 09:21:10,124 INFO L226 Difference]: Without dead ends: 240 [2020-10-28 09:21:10,126 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=531, Invalid=591, Unknown=0, NotChecked=0, Total=1122 [2020-10-28 09:21:10,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2020-10-28 09:21:10,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 238. [2020-10-28 09:21:10,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 238 states. [2020-10-28 09:21:10,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 269 transitions. [2020-10-28 09:21:10,141 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 269 transitions. Word has length 82 [2020-10-28 09:21:10,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:21:10,141 INFO L481 AbstractCegarLoop]: Abstraction has 238 states and 269 transitions. [2020-10-28 09:21:10,141 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-28 09:21:10,141 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 269 transitions. [2020-10-28 09:21:10,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-28 09:21:10,142 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:21:10,142 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:21:10,143 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-28 09:21:10,143 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:21:10,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:21:10,143 INFO L82 PathProgramCache]: Analyzing trace with hash 1549425715, now seen corresponding path program 26 times [2020-10-28 09:21:10,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:21:10,144 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [230648213] [2020-10-28 09:21:10,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:21:10,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:21:10,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:10,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:12,524 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:21:12,524 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-28 09:21:12,524 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:21:12,524 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2361 [2020-10-28 09:21:12,524 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:21:12,524 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:21:12,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-28 09:21:12,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:21:12,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-28 09:21:12,525 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:21:13,308 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:21:13,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:21:13,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:13,314 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:21:13,314 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:21:13,314 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:21:13,314 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:21:13,314 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:21:13,315 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:21:13,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:21:13,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:21:13,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:21:13,315 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:21:13,317 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-10-28 09:21:13,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:21:13,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:13,319 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:21:13,320 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:21:13,320 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:21:13,320 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:21:13,320 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:21:13,320 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:21:13,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:21:13,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:21:13,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:21:13,321 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:21:13,327 INFO L134 CoverageAnalysis]: Checked inductivity of 904 backedges. 2 proven. 900 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 09:21:13,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [230648213] [2020-10-28 09:21:13,328 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:21:13,328 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-28 09:21:13,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831855338] [2020-10-28 09:21:13,328 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-28 09:21:13,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:21:13,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-28 09:21:13,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-28 09:21:13,330 INFO L87 Difference]: Start difference. First operand 238 states and 269 transitions. Second operand 34 states. [2020-10-28 09:21:14,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:21:14,346 INFO L93 Difference]: Finished difference Result 418 states and 482 transitions. [2020-10-28 09:21:14,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-28 09:21:14,346 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 84 [2020-10-28 09:21:14,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:21:14,349 INFO L225 Difference]: With dead ends: 418 [2020-10-28 09:21:14,350 INFO L226 Difference]: Without dead ends: 247 [2020-10-28 09:21:14,351 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=564, Invalid=626, Unknown=0, NotChecked=0, Total=1190 [2020-10-28 09:21:14,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2020-10-28 09:21:14,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 245. [2020-10-28 09:21:14,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 245 states. [2020-10-28 09:21:14,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 277 transitions. [2020-10-28 09:21:14,366 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 277 transitions. Word has length 84 [2020-10-28 09:21:14,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:21:14,367 INFO L481 AbstractCegarLoop]: Abstraction has 245 states and 277 transitions. [2020-10-28 09:21:14,367 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-28 09:21:14,367 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 277 transitions. [2020-10-28 09:21:14,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-10-28 09:21:14,368 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:21:14,368 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:21:14,369 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-28 09:21:14,369 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:21:14,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:21:14,369 INFO L82 PathProgramCache]: Analyzing trace with hash 1453301973, now seen corresponding path program 27 times [2020-10-28 09:21:14,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:21:14,374 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1847479543] [2020-10-28 09:21:14,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:21:14,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:21:14,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:14,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:16,226 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:21:16,226 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 98 [2020-10-28 09:21:16,226 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:21:16,226 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1833 [2020-10-28 09:21:16,226 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:21:16,226 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:21:16,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-28 09:21:16,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:21:16,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-28 09:21:16,227 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:21:17,088 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:21:17,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:21:17,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:17,093 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:21:17,093 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:21:17,093 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:21:17,093 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:21:17,093 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:21:17,093 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:21:17,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:21:17,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:21:17,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:21:17,094 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:21:17,095 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-10-28 09:21:17,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:21:17,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:17,097 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:21:17,097 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:21:17,098 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:21:17,098 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:21:17,098 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:21:17,098 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:21:17,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:21:17,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:21:17,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:21:17,099 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:21:17,109 INFO L134 CoverageAnalysis]: Checked inductivity of 965 backedges. 2 proven. 961 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 09:21:17,109 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1847479543] [2020-10-28 09:21:17,109 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:21:17,109 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-28 09:21:17,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832945426] [2020-10-28 09:21:17,110 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-28 09:21:17,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:21:17,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-28 09:21:17,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-28 09:21:17,111 INFO L87 Difference]: Start difference. First operand 245 states and 277 transitions. Second operand 35 states. [2020-10-28 09:21:18,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:21:18,276 INFO L93 Difference]: Finished difference Result 430 states and 496 transitions. [2020-10-28 09:21:18,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-28 09:21:18,277 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 86 [2020-10-28 09:21:18,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:21:18,279 INFO L225 Difference]: With dead ends: 430 [2020-10-28 09:21:18,279 INFO L226 Difference]: Without dead ends: 254 [2020-10-28 09:21:18,280 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=598, Invalid=662, Unknown=0, NotChecked=0, Total=1260 [2020-10-28 09:21:18,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2020-10-28 09:21:18,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 252. [2020-10-28 09:21:18,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 252 states. [2020-10-28 09:21:18,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 285 transitions. [2020-10-28 09:21:18,293 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 285 transitions. Word has length 86 [2020-10-28 09:21:18,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:21:18,294 INFO L481 AbstractCegarLoop]: Abstraction has 252 states and 285 transitions. [2020-10-28 09:21:18,294 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-28 09:21:18,294 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 285 transitions. [2020-10-28 09:21:18,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-10-28 09:21:18,294 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:21:18,294 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:21:18,295 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-28 09:21:18,295 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:21:18,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:21:18,295 INFO L82 PathProgramCache]: Analyzing trace with hash -727300873, now seen corresponding path program 28 times [2020-10-28 09:21:18,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:21:18,296 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [107627950] [2020-10-28 09:21:18,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:21:18,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:21:18,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:18,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:20,472 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:21:20,472 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-10-28 09:21:20,472 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:21:20,472 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2159 [2020-10-28 09:21:20,473 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:21:20,473 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:21:20,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-28 09:21:20,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:21:20,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-28 09:21:20,473 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:21:21,348 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:21:21,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:21:21,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:21,353 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:21:21,353 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:21:21,353 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:21:21,353 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:21:21,353 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:21:21,353 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:21:21,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:21:21,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:21:21,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:21:21,354 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:21:21,355 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-10-28 09:21:21,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:21:21,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:21,357 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:21:21,357 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:21:21,357 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:21:21,357 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:21:21,357 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:21:21,357 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:21:21,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:21:21,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:21:21,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:21:21,358 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:21:21,365 INFO L134 CoverageAnalysis]: Checked inductivity of 1028 backedges. 2 proven. 1024 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 09:21:21,366 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [107627950] [2020-10-28 09:21:21,366 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:21:21,366 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-28 09:21:21,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740070497] [2020-10-28 09:21:21,366 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-28 09:21:21,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:21:21,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-28 09:21:21,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-28 09:21:21,367 INFO L87 Difference]: Start difference. First operand 252 states and 285 transitions. Second operand 36 states. [2020-10-28 09:21:22,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:21:22,382 INFO L93 Difference]: Finished difference Result 442 states and 510 transitions. [2020-10-28 09:21:22,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-28 09:21:22,383 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 88 [2020-10-28 09:21:22,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:21:22,385 INFO L225 Difference]: With dead ends: 442 [2020-10-28 09:21:22,385 INFO L226 Difference]: Without dead ends: 261 [2020-10-28 09:21:22,387 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=633, Invalid=699, Unknown=0, NotChecked=0, Total=1332 [2020-10-28 09:21:22,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2020-10-28 09:21:22,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 259. [2020-10-28 09:21:22,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 259 states. [2020-10-28 09:21:22,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 293 transitions. [2020-10-28 09:21:22,400 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 293 transitions. Word has length 88 [2020-10-28 09:21:22,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:21:22,401 INFO L481 AbstractCegarLoop]: Abstraction has 259 states and 293 transitions. [2020-10-28 09:21:22,401 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-28 09:21:22,401 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 293 transitions. [2020-10-28 09:21:22,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-10-28 09:21:22,407 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:21:22,407 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:21:22,409 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-28 09:21:22,409 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:21:22,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:21:22,410 INFO L82 PathProgramCache]: Analyzing trace with hash -342595431, now seen corresponding path program 29 times [2020-10-28 09:21:22,410 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:21:22,410 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [238418220] [2020-10-28 09:21:22,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:21:22,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:21:22,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:23,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:25,330 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:21:25,330 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-28 09:21:25,330 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:21:25,330 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2897 [2020-10-28 09:21:25,330 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:21:25,330 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:21:25,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-28 09:21:25,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:21:25,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-28 09:21:25,331 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:21:26,298 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:21:26,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:21:26,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:26,303 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:21:26,303 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:21:26,303 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:21:26,303 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:21:26,303 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:21:26,303 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:21:26,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:21:26,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:21:26,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:21:26,304 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:21:26,305 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-10-28 09:21:26,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:21:26,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:26,307 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:21:26,307 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:21:26,307 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:21:26,307 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:21:26,307 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:21:26,307 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:21:26,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:21:26,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:21:26,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:21:26,307 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:21:26,316 INFO L134 CoverageAnalysis]: Checked inductivity of 1093 backedges. 2 proven. 1089 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 09:21:26,316 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [238418220] [2020-10-28 09:21:26,316 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:21:26,316 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-28 09:21:26,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916839287] [2020-10-28 09:21:26,317 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-28 09:21:26,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:21:26,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-28 09:21:26,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-28 09:21:26,318 INFO L87 Difference]: Start difference. First operand 259 states and 293 transitions. Second operand 37 states. [2020-10-28 09:21:27,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:21:27,589 INFO L93 Difference]: Finished difference Result 454 states and 524 transitions. [2020-10-28 09:21:27,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-28 09:21:27,589 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 90 [2020-10-28 09:21:27,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:21:27,591 INFO L225 Difference]: With dead ends: 454 [2020-10-28 09:21:27,591 INFO L226 Difference]: Without dead ends: 268 [2020-10-28 09:21:27,593 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=669, Invalid=737, Unknown=0, NotChecked=0, Total=1406 [2020-10-28 09:21:27,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2020-10-28 09:21:27,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 266. [2020-10-28 09:21:27,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 266 states. [2020-10-28 09:21:27,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 301 transitions. [2020-10-28 09:21:27,606 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 301 transitions. Word has length 90 [2020-10-28 09:21:27,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:21:27,606 INFO L481 AbstractCegarLoop]: Abstraction has 266 states and 301 transitions. [2020-10-28 09:21:27,606 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-28 09:21:27,606 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 301 transitions. [2020-10-28 09:21:27,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-10-28 09:21:27,607 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:21:27,607 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:21:27,607 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-28 09:21:27,607 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:21:27,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:21:27,608 INFO L82 PathProgramCache]: Analyzing trace with hash -7853125, now seen corresponding path program 30 times [2020-10-28 09:21:27,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:21:27,608 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [484892963] [2020-10-28 09:21:27,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:21:27,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:21:27,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:28,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:30,004 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:21:30,004 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-10-28 09:21:30,004 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:21:30,004 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2377 [2020-10-28 09:21:30,004 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:21:30,004 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:21:30,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-28 09:21:30,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:21:30,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-28 09:21:30,005 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:21:31,027 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:21:31,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:21:31,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:31,034 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:21:31,034 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:21:31,034 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:21:31,035 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:21:31,035 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:21:31,035 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:21:31,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:21:31,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:21:31,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:21:31,035 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:21:31,037 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2020-10-28 09:21:31,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:21:31,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:31,039 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:21:31,039 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:21:31,039 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:21:31,039 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:21:31,039 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:21:31,040 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:21:31,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:21:31,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:21:31,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:21:31,040 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:21:31,049 INFO L134 CoverageAnalysis]: Checked inductivity of 1160 backedges. 2 proven. 1156 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 09:21:31,049 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [484892963] [2020-10-28 09:21:31,050 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:21:31,050 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-28 09:21:31,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882003106] [2020-10-28 09:21:31,050 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-28 09:21:31,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:21:31,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-28 09:21:31,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-28 09:21:31,052 INFO L87 Difference]: Start difference. First operand 266 states and 301 transitions. Second operand 38 states. [2020-10-28 09:21:32,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:21:32,193 INFO L93 Difference]: Finished difference Result 466 states and 538 transitions. [2020-10-28 09:21:32,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-28 09:21:32,193 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 92 [2020-10-28 09:21:32,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:21:32,195 INFO L225 Difference]: With dead ends: 466 [2020-10-28 09:21:32,195 INFO L226 Difference]: Without dead ends: 275 [2020-10-28 09:21:32,197 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=706, Invalid=776, Unknown=0, NotChecked=0, Total=1482 [2020-10-28 09:21:32,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2020-10-28 09:21:32,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 273. [2020-10-28 09:21:32,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 273 states. [2020-10-28 09:21:32,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 309 transitions. [2020-10-28 09:21:32,209 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 309 transitions. Word has length 92 [2020-10-28 09:21:32,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:21:32,209 INFO L481 AbstractCegarLoop]: Abstraction has 273 states and 309 transitions. [2020-10-28 09:21:32,209 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-28 09:21:32,210 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 309 transitions. [2020-10-28 09:21:32,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-10-28 09:21:32,210 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:21:32,211 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:21:32,211 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-28 09:21:32,211 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:21:32,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:21:32,211 INFO L82 PathProgramCache]: Analyzing trace with hash -443044259, now seen corresponding path program 31 times [2020-10-28 09:21:32,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:21:32,212 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1569085468] [2020-10-28 09:21:32,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:21:32,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:21:32,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:32,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:35,544 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:21:35,544 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-10-28 09:21:35,544 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:21:35,544 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3311 [2020-10-28 09:21:35,544 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:21:35,544 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:21:35,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-28 09:21:35,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:21:35,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-28 09:21:35,545 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:21:36,603 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:21:36,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:21:36,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:36,608 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:21:36,609 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:21:36,609 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:21:36,609 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:21:36,609 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:21:36,609 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:21:36,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:21:36,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:21:36,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:21:36,610 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:21:36,612 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2020-10-28 09:21:36,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:21:36,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:36,614 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:21:36,614 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:21:36,614 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:21:36,614 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:21:36,615 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:21:36,615 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:21:36,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:21:36,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:21:36,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:21:36,615 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:21:36,626 INFO L134 CoverageAnalysis]: Checked inductivity of 1229 backedges. 2 proven. 1225 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 09:21:36,626 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1569085468] [2020-10-28 09:21:36,626 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:21:36,626 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-28 09:21:36,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136741390] [2020-10-28 09:21:36,627 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-28 09:21:36,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:21:36,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-28 09:21:36,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-28 09:21:36,628 INFO L87 Difference]: Start difference. First operand 273 states and 309 transitions. Second operand 39 states. [2020-10-28 09:21:37,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:21:37,786 INFO L93 Difference]: Finished difference Result 478 states and 552 transitions. [2020-10-28 09:21:37,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-28 09:21:37,787 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 94 [2020-10-28 09:21:37,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:21:37,789 INFO L225 Difference]: With dead ends: 478 [2020-10-28 09:21:37,789 INFO L226 Difference]: Without dead ends: 282 [2020-10-28 09:21:37,791 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=744, Invalid=816, Unknown=0, NotChecked=0, Total=1560 [2020-10-28 09:21:37,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2020-10-28 09:21:37,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 280. [2020-10-28 09:21:37,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 280 states. [2020-10-28 09:21:37,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 317 transitions. [2020-10-28 09:21:37,803 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 317 transitions. Word has length 94 [2020-10-28 09:21:37,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:21:37,803 INFO L481 AbstractCegarLoop]: Abstraction has 280 states and 317 transitions. [2020-10-28 09:21:37,803 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-28 09:21:37,803 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 317 transitions. [2020-10-28 09:21:37,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-10-28 09:21:37,804 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:21:37,804 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:21:37,804 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-28 09:21:37,804 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:21:37,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:21:37,805 INFO L82 PathProgramCache]: Analyzing trace with hash -2049896321, now seen corresponding path program 32 times [2020-10-28 09:21:37,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:21:37,805 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1339324449] [2020-10-28 09:21:37,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:21:37,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:21:37,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:38,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:41,292 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:21:41,292 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 108 [2020-10-28 09:21:41,292 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:21:41,293 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3467 [2020-10-28 09:21:41,293 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:21:41,293 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:21:41,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-28 09:21:41,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:21:41,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-28 09:21:41,293 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:21:42,464 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:21:42,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:21:42,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:42,469 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:21:42,470 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:21:42,470 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:21:42,470 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:21:42,470 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:21:42,470 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:21:42,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:21:42,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:21:42,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:21:42,471 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:21:42,473 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-10-28 09:21:42,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:21:42,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:42,476 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:21:42,476 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:21:42,476 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:21:42,476 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:21:42,476 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:21:42,476 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:21:42,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:21:42,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:21:42,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:21:42,477 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:21:42,504 INFO L134 CoverageAnalysis]: Checked inductivity of 1300 backedges. 2 proven. 1296 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 09:21:42,504 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1339324449] [2020-10-28 09:21:42,504 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:21:42,504 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-28 09:21:42,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391030799] [2020-10-28 09:21:42,505 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-28 09:21:42,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:21:42,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-28 09:21:42,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-28 09:21:42,506 INFO L87 Difference]: Start difference. First operand 280 states and 317 transitions. Second operand 40 states. [2020-10-28 09:21:43,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:21:43,998 INFO L93 Difference]: Finished difference Result 490 states and 566 transitions. [2020-10-28 09:21:43,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-28 09:21:43,999 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 96 [2020-10-28 09:21:43,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:21:44,001 INFO L225 Difference]: With dead ends: 490 [2020-10-28 09:21:44,001 INFO L226 Difference]: Without dead ends: 289 [2020-10-28 09:21:44,002 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=783, Invalid=857, Unknown=0, NotChecked=0, Total=1640 [2020-10-28 09:21:44,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2020-10-28 09:21:44,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 287. [2020-10-28 09:21:44,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 287 states. [2020-10-28 09:21:44,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 325 transitions. [2020-10-28 09:21:44,016 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 325 transitions. Word has length 96 [2020-10-28 09:21:44,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:21:44,017 INFO L481 AbstractCegarLoop]: Abstraction has 287 states and 325 transitions. [2020-10-28 09:21:44,017 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-28 09:21:44,017 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 325 transitions. [2020-10-28 09:21:44,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-10-28 09:21:44,018 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:21:44,019 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:21:44,019 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-28 09:21:44,019 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:21:44,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:21:44,019 INFO L82 PathProgramCache]: Analyzing trace with hash -46501343, now seen corresponding path program 33 times [2020-10-28 09:21:44,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:21:44,020 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1052200215] [2020-10-28 09:21:44,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:21:44,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:21:44,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:44,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:47,645 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:21:47,645 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 110 [2020-10-28 09:21:47,646 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:21:47,646 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3606 [2020-10-28 09:21:47,646 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:21:47,646 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:21:47,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-28 09:21:47,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:21:47,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-28 09:21:47,646 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:21:48,809 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:21:48,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:21:48,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:48,814 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:21:48,814 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:21:48,814 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:21:48,814 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:21:48,814 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:21:48,815 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:21:48,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:21:48,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:21:48,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:21:48,815 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:21:48,817 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-10-28 09:21:48,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:21:48,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:48,818 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:21:48,819 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:21:48,819 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:21:48,819 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:21:48,821 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:21:48,821 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:21:48,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:21:48,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:21:48,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:21:48,822 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:21:48,835 INFO L134 CoverageAnalysis]: Checked inductivity of 1373 backedges. 2 proven. 1369 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 09:21:48,836 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1052200215] [2020-10-28 09:21:48,837 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:21:48,837 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-28 09:21:48,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166270933] [2020-10-28 09:21:48,837 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-28 09:21:48,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:21:48,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-28 09:21:48,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-28 09:21:48,839 INFO L87 Difference]: Start difference. First operand 287 states and 325 transitions. Second operand 41 states. [2020-10-28 09:21:50,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:21:50,430 INFO L93 Difference]: Finished difference Result 502 states and 580 transitions. [2020-10-28 09:21:50,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-28 09:21:50,430 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 98 [2020-10-28 09:21:50,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:21:50,433 INFO L225 Difference]: With dead ends: 502 [2020-10-28 09:21:50,433 INFO L226 Difference]: Without dead ends: 296 [2020-10-28 09:21:50,434 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=823, Invalid=899, Unknown=0, NotChecked=0, Total=1722 [2020-10-28 09:21:50,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2020-10-28 09:21:50,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 294. [2020-10-28 09:21:50,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 294 states. [2020-10-28 09:21:50,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 333 transitions. [2020-10-28 09:21:50,448 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 333 transitions. Word has length 98 [2020-10-28 09:21:50,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:21:50,448 INFO L481 AbstractCegarLoop]: Abstraction has 294 states and 333 transitions. [2020-10-28 09:21:50,448 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-28 09:21:50,448 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 333 transitions. [2020-10-28 09:21:50,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-10-28 09:21:50,449 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:21:50,449 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:21:50,449 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-28 09:21:50,449 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:21:50,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:21:50,450 INFO L82 PathProgramCache]: Analyzing trace with hash 1070723907, now seen corresponding path program 34 times [2020-10-28 09:21:50,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:21:50,450 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [257827830] [2020-10-28 09:21:50,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:21:50,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:21:50,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:51,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:53,894 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:21:53,894 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-28 09:21:53,894 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:21:53,894 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3422 [2020-10-28 09:21:53,894 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:21:53,894 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:21:53,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-28 09:21:53,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:21:53,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-28 09:21:53,895 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:21:55,136 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:21:55,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:21:55,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:55,142 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:21:55,142 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:21:55,142 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:21:55,142 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:21:55,143 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:21:55,143 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:21:55,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:21:55,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:21:55,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:21:55,143 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:21:55,145 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2020-10-28 09:21:55,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:21:55,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:55,147 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:21:55,147 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:21:55,147 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:21:55,147 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:21:55,147 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:21:55,148 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:21:55,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:21:55,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:21:55,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:21:55,148 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:21:55,158 INFO L134 CoverageAnalysis]: Checked inductivity of 1448 backedges. 2 proven. 1444 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 09:21:55,158 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [257827830] [2020-10-28 09:21:55,158 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:21:55,158 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-10-28 09:21:55,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663872194] [2020-10-28 09:21:55,159 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-28 09:21:55,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:21:55,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-28 09:21:55,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-10-28 09:21:55,160 INFO L87 Difference]: Start difference. First operand 294 states and 333 transitions. Second operand 42 states. [2020-10-28 09:21:56,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:21:56,440 INFO L93 Difference]: Finished difference Result 514 states and 594 transitions. [2020-10-28 09:21:56,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-28 09:21:56,441 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 100 [2020-10-28 09:21:56,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:21:56,443 INFO L225 Difference]: With dead ends: 514 [2020-10-28 09:21:56,443 INFO L226 Difference]: Without dead ends: 303 [2020-10-28 09:21:56,444 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=864, Invalid=942, Unknown=0, NotChecked=0, Total=1806 [2020-10-28 09:21:56,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2020-10-28 09:21:56,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 301. [2020-10-28 09:21:56,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 301 states. [2020-10-28 09:21:56,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 341 transitions. [2020-10-28 09:21:56,459 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 341 transitions. Word has length 100 [2020-10-28 09:21:56,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:21:56,459 INFO L481 AbstractCegarLoop]: Abstraction has 301 states and 341 transitions. [2020-10-28 09:21:56,459 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-28 09:21:56,459 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 341 transitions. [2020-10-28 09:21:56,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-10-28 09:21:56,461 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:21:56,462 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:21:56,462 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-28 09:21:56,462 INFO L429 AbstractCegarLoop]: === Iteration 42 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:21:56,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:21:56,462 INFO L82 PathProgramCache]: Analyzing trace with hash 982365157, now seen corresponding path program 35 times [2020-10-28 09:21:56,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:21:56,463 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1062539721] [2020-10-28 09:21:56,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:21:56,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:21:56,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:57,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:59,127 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:21:59,127 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 114 [2020-10-28 09:21:59,127 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:21:59,127 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2637 [2020-10-28 09:21:59,128 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:21:59,128 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:21:59,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 41 [2020-10-28 09:21:59,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:21:59,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-28 09:21:59,128 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:22:00,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:22:00,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:22:00,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:00,409 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:22:00,409 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:22:00,409 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:22:00,409 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:22:00,409 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:22:00,409 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:22:00,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:22:00,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:22:00,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:22:00,409 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:22:00,411 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2020-10-28 09:22:00,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:22:00,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:00,413 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:22:00,413 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:22:00,413 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:22:00,413 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:22:00,413 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:22:00,413 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:22:00,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:22:00,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:22:00,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:22:00,414 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:22:00,423 INFO L134 CoverageAnalysis]: Checked inductivity of 1525 backedges. 2 proven. 1521 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 09:22:00,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1062539721] [2020-10-28 09:22:00,423 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:22:00,423 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-10-28 09:22:00,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766648799] [2020-10-28 09:22:00,424 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-28 09:22:00,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:22:00,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-28 09:22:00,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2020-10-28 09:22:00,425 INFO L87 Difference]: Start difference. First operand 301 states and 341 transitions. Second operand 43 states. [2020-10-28 09:22:01,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:22:01,776 INFO L93 Difference]: Finished difference Result 526 states and 608 transitions. [2020-10-28 09:22:01,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-28 09:22:01,777 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 102 [2020-10-28 09:22:01,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:22:01,780 INFO L225 Difference]: With dead ends: 526 [2020-10-28 09:22:01,780 INFO L226 Difference]: Without dead ends: 310 [2020-10-28 09:22:01,782 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=906, Invalid=986, Unknown=0, NotChecked=0, Total=1892 [2020-10-28 09:22:01,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2020-10-28 09:22:01,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 308. [2020-10-28 09:22:01,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 308 states. [2020-10-28 09:22:01,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 349 transitions. [2020-10-28 09:22:01,794 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 349 transitions. Word has length 102 [2020-10-28 09:22:01,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:22:01,795 INFO L481 AbstractCegarLoop]: Abstraction has 308 states and 349 transitions. [2020-10-28 09:22:01,795 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-28 09:22:01,795 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 349 transitions. [2020-10-28 09:22:01,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-10-28 09:22:01,796 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:22:01,796 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:22:01,796 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-28 09:22:01,796 INFO L429 AbstractCegarLoop]: === Iteration 43 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:22:01,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:22:01,797 INFO L82 PathProgramCache]: Analyzing trace with hash 1968952327, now seen corresponding path program 36 times [2020-10-28 09:22:01,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:22:01,797 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1211609105] [2020-10-28 09:22:01,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:22:01,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:22:01,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:02,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:06,830 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:22:06,830 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 116 [2020-10-28 09:22:06,831 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:22:06,831 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-28 09:22:06,831 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:22:06,831 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:22:06,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 42 [2020-10-28 09:22:06,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:22:06,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-28 09:22:06,831 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:22:08,205 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:22:08,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:22:08,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:08,210 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:22:08,210 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:22:08,210 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:22:08,210 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:22:08,210 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:22:08,210 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:22:08,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:22:08,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:22:08,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:22:08,211 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:22:08,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2020-10-28 09:22:08,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:22:08,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:08,214 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:22:08,214 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:22:08,214 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:22:08,214 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:22:08,214 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:22:08,215 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:22:08,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:22:08,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:22:08,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:22:08,215 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:22:08,225 INFO L134 CoverageAnalysis]: Checked inductivity of 1604 backedges. 2 proven. 1600 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 09:22:08,226 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1211609105] [2020-10-28 09:22:08,226 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:22:08,226 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-10-28 09:22:08,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841970786] [2020-10-28 09:22:08,226 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-10-28 09:22:08,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:22:08,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-10-28 09:22:08,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2020-10-28 09:22:08,228 INFO L87 Difference]: Start difference. First operand 308 states and 349 transitions. Second operand 44 states. [2020-10-28 09:22:09,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:22:09,739 INFO L93 Difference]: Finished difference Result 538 states and 622 transitions. [2020-10-28 09:22:09,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-28 09:22:09,739 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 104 [2020-10-28 09:22:09,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:22:09,742 INFO L225 Difference]: With dead ends: 538 [2020-10-28 09:22:09,742 INFO L226 Difference]: Without dead ends: 317 [2020-10-28 09:22:09,743 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=949, Invalid=1031, Unknown=0, NotChecked=0, Total=1980 [2020-10-28 09:22:09,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2020-10-28 09:22:09,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 315. [2020-10-28 09:22:09,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 315 states. [2020-10-28 09:22:09,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 357 transitions. [2020-10-28 09:22:09,756 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 357 transitions. Word has length 104 [2020-10-28 09:22:09,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:22:09,756 INFO L481 AbstractCegarLoop]: Abstraction has 315 states and 357 transitions. [2020-10-28 09:22:09,756 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-10-28 09:22:09,757 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 357 transitions. [2020-10-28 09:22:09,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-10-28 09:22:09,757 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:22:09,757 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:22:09,758 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-28 09:22:09,758 INFO L429 AbstractCegarLoop]: === Iteration 44 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:22:09,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:22:09,758 INFO L82 PathProgramCache]: Analyzing trace with hash 891450281, now seen corresponding path program 37 times [2020-10-28 09:22:09,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:22:09,759 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [376289841] [2020-10-28 09:22:09,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:22:09,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:22:09,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:10,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:13,885 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:22:13,886 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 118 [2020-10-28 09:22:13,886 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:22:13,886 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4104 [2020-10-28 09:22:13,886 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:22:13,886 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:22:13,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 43 [2020-10-28 09:22:13,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:22:13,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 84 [2020-10-28 09:22:13,886 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:22:15,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:22:15,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:22:15,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:15,328 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:22:15,328 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:22:15,329 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:22:15,329 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:22:15,329 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:22:15,329 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:22:15,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:22:15,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:22:15,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:22:15,329 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:22:15,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2020-10-28 09:22:15,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:22:15,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:15,332 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:22:15,333 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:22:15,333 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:22:15,333 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:22:15,333 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:22:15,333 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:22:15,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:22:15,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:22:15,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:22:15,333 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:22:15,343 INFO L134 CoverageAnalysis]: Checked inductivity of 1685 backedges. 2 proven. 1681 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 09:22:15,344 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [376289841] [2020-10-28 09:22:15,344 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:22:15,344 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-10-28 09:22:15,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234109400] [2020-10-28 09:22:15,344 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-10-28 09:22:15,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:22:15,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-10-28 09:22:15,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2020-10-28 09:22:15,346 INFO L87 Difference]: Start difference. First operand 315 states and 357 transitions. Second operand 45 states. [2020-10-28 09:22:16,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:22:16,759 INFO L93 Difference]: Finished difference Result 550 states and 636 transitions. [2020-10-28 09:22:16,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-28 09:22:16,760 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 106 [2020-10-28 09:22:16,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:22:16,763 INFO L225 Difference]: With dead ends: 550 [2020-10-28 09:22:16,763 INFO L226 Difference]: Without dead ends: 324 [2020-10-28 09:22:16,766 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=993, Invalid=1077, Unknown=0, NotChecked=0, Total=2070 [2020-10-28 09:22:16,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2020-10-28 09:22:16,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 322. [2020-10-28 09:22:16,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 322 states. [2020-10-28 09:22:16,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 365 transitions. [2020-10-28 09:22:16,779 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 365 transitions. Word has length 106 [2020-10-28 09:22:16,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:22:16,779 INFO L481 AbstractCegarLoop]: Abstraction has 322 states and 365 transitions. [2020-10-28 09:22:16,780 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-10-28 09:22:16,780 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 365 transitions. [2020-10-28 09:22:16,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-10-28 09:22:16,780 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:22:16,780 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:22:16,781 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-28 09:22:16,781 INFO L429 AbstractCegarLoop]: === Iteration 45 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:22:16,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:22:16,781 INFO L82 PathProgramCache]: Analyzing trace with hash 499102411, now seen corresponding path program 38 times [2020-10-28 09:22:16,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:22:16,782 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1238305422] [2020-10-28 09:22:16,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:22:16,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:22:16,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:16,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:21,826 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:22:21,826 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 120 [2020-10-28 09:22:21,826 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:22:21,826 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5022 [2020-10-28 09:22:21,826 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:22:21,826 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:22:21,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 44 [2020-10-28 09:22:21,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:22:21,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 86 [2020-10-28 09:22:21,827 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:22:23,314 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:22:23,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:22:23,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:23,320 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:22:23,320 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:22:23,320 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:22:23,320 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:22:23,321 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:22:23,321 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:22:23,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:22:23,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:22:23,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:22:23,321 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:22:23,323 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-10-28 09:22:23,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:22:23,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:23,326 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:22:23,326 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:22:23,326 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:22:23,326 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:22:23,326 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:22:23,327 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:22:23,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:22:23,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:22:23,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:22:23,327 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:22:23,340 INFO L134 CoverageAnalysis]: Checked inductivity of 1768 backedges. 2 proven. 1764 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 09:22:23,341 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1238305422] [2020-10-28 09:22:23,341 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:22:23,341 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-10-28 09:22:23,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065939663] [2020-10-28 09:22:23,341 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-10-28 09:22:23,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:22:23,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-10-28 09:22:23,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2020-10-28 09:22:23,343 INFO L87 Difference]: Start difference. First operand 322 states and 365 transitions. Second operand 46 states. [2020-10-28 09:22:24,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:22:24,868 INFO L93 Difference]: Finished difference Result 562 states and 650 transitions. [2020-10-28 09:22:24,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-28 09:22:24,869 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 108 [2020-10-28 09:22:24,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:22:24,872 INFO L225 Difference]: With dead ends: 562 [2020-10-28 09:22:24,872 INFO L226 Difference]: Without dead ends: 331 [2020-10-28 09:22:24,874 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1038, Invalid=1124, Unknown=0, NotChecked=0, Total=2162 [2020-10-28 09:22:24,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2020-10-28 09:22:24,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 329. [2020-10-28 09:22:24,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 329 states. [2020-10-28 09:22:24,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 373 transitions. [2020-10-28 09:22:24,887 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 373 transitions. Word has length 108 [2020-10-28 09:22:24,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:22:24,887 INFO L481 AbstractCegarLoop]: Abstraction has 329 states and 373 transitions. [2020-10-28 09:22:24,887 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-10-28 09:22:24,887 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 373 transitions. [2020-10-28 09:22:24,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-10-28 09:22:24,888 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:22:24,888 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:22:24,888 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-28 09:22:24,888 INFO L429 AbstractCegarLoop]: === Iteration 46 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:22:24,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:22:24,889 INFO L82 PathProgramCache]: Analyzing trace with hash 1409921389, now seen corresponding path program 39 times [2020-10-28 09:22:24,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:22:24,889 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [103072347] [2020-10-28 09:22:24,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:22:24,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:22:24,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:25,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:28,898 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:22:28,899 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 122 [2020-10-28 09:22:28,899 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:22:28,899 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3987 [2020-10-28 09:22:28,899 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:22:28,899 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:22:28,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 45 [2020-10-28 09:22:28,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:22:28,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 88 [2020-10-28 09:22:28,899 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:22:30,430 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:22:30,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:22:30,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:30,435 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:22:30,435 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:22:30,435 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:22:30,435 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:22:30,435 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:22:30,435 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:22:30,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:22:30,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:22:30,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:22:30,436 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:22:30,437 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-28 09:22:30,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:22:30,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:30,439 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:22:30,439 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:22:30,439 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:22:30,439 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:22:30,439 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:22:30,439 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:22:30,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:22:30,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:22:30,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:22:30,439 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:22:30,450 INFO L134 CoverageAnalysis]: Checked inductivity of 1853 backedges. 2 proven. 1849 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 09:22:30,450 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [103072347] [2020-10-28 09:22:30,450 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:22:30,450 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2020-10-28 09:22:30,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873966591] [2020-10-28 09:22:30,453 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-10-28 09:22:30,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:22:30,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-10-28 09:22:30,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2020-10-28 09:22:30,454 INFO L87 Difference]: Start difference. First operand 329 states and 373 transitions. Second operand 47 states. [2020-10-28 09:22:32,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:22:32,177 INFO L93 Difference]: Finished difference Result 574 states and 664 transitions. [2020-10-28 09:22:32,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-28 09:22:32,178 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 110 [2020-10-28 09:22:32,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:22:32,182 INFO L225 Difference]: With dead ends: 574 [2020-10-28 09:22:32,182 INFO L226 Difference]: Without dead ends: 338 [2020-10-28 09:22:32,183 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1084, Invalid=1172, Unknown=0, NotChecked=0, Total=2256 [2020-10-28 09:22:32,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2020-10-28 09:22:32,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 336. [2020-10-28 09:22:32,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 336 states. [2020-10-28 09:22:32,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 381 transitions. [2020-10-28 09:22:32,196 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 381 transitions. Word has length 110 [2020-10-28 09:22:32,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:22:32,197 INFO L481 AbstractCegarLoop]: Abstraction has 336 states and 381 transitions. [2020-10-28 09:22:32,197 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-10-28 09:22:32,197 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 381 transitions. [2020-10-28 09:22:32,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-10-28 09:22:32,198 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:22:32,198 INFO L422 BasicCegarLoop]: trace histogram [44, 44, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:22:32,198 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-28 09:22:32,198 INFO L429 AbstractCegarLoop]: === Iteration 47 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:22:32,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:22:32,199 INFO L82 PathProgramCache]: Analyzing trace with hash 533630863, now seen corresponding path program 40 times [2020-10-28 09:22:32,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:22:32,199 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [297299680] [2020-10-28 09:22:32,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:22:32,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:22:32,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:32,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:37,233 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:22:37,233 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 124 [2020-10-28 09:22:37,233 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:22:37,233 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-28 09:22:37,233 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:22:37,233 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:22:37,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 46 [2020-10-28 09:22:37,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:22:37,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 90 [2020-10-28 09:22:37,234 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:22:38,882 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:22:38,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:22:38,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:38,890 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:22:38,890 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:22:38,890 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:22:38,890 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 09:22:38,890 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:22:38,890 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:22:38,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:22:38,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:22:38,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:22:38,891 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:22:38,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-10-28 09:22:38,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:22:38,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:38,894 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:22:38,894 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:22:38,895 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:22:38,895 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:22:38,895 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:22:38,895 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:22:38,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:22:38,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:22:38,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:22:38,895 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:22:38,906 INFO L134 CoverageAnalysis]: Checked inductivity of 1940 backedges. 2 proven. 1936 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 09:22:38,906 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [297299680] [2020-10-28 09:22:38,906 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:22:38,906 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2020-10-28 09:22:38,907 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155924887] [2020-10-28 09:22:38,907 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-10-28 09:22:38,907 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:22:38,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-10-28 09:22:38,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2020-10-28 09:22:38,908 INFO L87 Difference]: Start difference. First operand 336 states and 381 transitions. Second operand 48 states. [2020-10-28 09:22:40,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:22:40,630 INFO L93 Difference]: Finished difference Result 586 states and 678 transitions. [2020-10-28 09:22:40,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-28 09:22:40,630 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 112 [2020-10-28 09:22:40,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:22:40,633 INFO L225 Difference]: With dead ends: 586 [2020-10-28 09:22:40,633 INFO L226 Difference]: Without dead ends: 345 [2020-10-28 09:22:40,634 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1131, Invalid=1221, Unknown=0, NotChecked=0, Total=2352 [2020-10-28 09:22:40,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2020-10-28 09:22:40,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 343. [2020-10-28 09:22:40,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 343 states. [2020-10-28 09:22:40,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 389 transitions. [2020-10-28 09:22:40,648 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 389 transitions. Word has length 112 [2020-10-28 09:22:40,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:22:40,648 INFO L481 AbstractCegarLoop]: Abstraction has 343 states and 389 transitions. [2020-10-28 09:22:40,648 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-10-28 09:22:40,648 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 389 transitions. [2020-10-28 09:22:40,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-10-28 09:22:40,649 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:22:40,649 INFO L422 BasicCegarLoop]: trace histogram [45, 45, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:22:40,649 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-28 09:22:40,649 INFO L429 AbstractCegarLoop]: === Iteration 48 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:22:40,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:22:40,650 INFO L82 PathProgramCache]: Analyzing trace with hash 232025393, now seen corresponding path program 41 times [2020-10-28 09:22:40,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:22:40,650 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [466690371] [2020-10-28 09:22:40,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:22:40,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:22:40,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:41,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:45,686 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:22:45,686 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 126 [2020-10-28 09:22:45,686 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:22:45,686 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-28 09:22:45,686 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:22:45,686 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:22:45,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 47 [2020-10-28 09:22:45,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:22:45,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 92 [2020-10-28 09:22:45,687 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:22:47,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:22:47,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:22:47,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:47,430 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:22:47,430 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:22:47,430 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:22:47,430 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 09:22:47,431 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:22:47,431 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:22:47,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:22:47,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:22:47,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:22:47,431 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:22:47,434 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2020-10-28 09:22:47,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:22:47,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:47,437 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:22:47,437 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:22:47,437 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:22:47,437 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:22:47,437 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:22:47,437 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:22:47,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:22:47,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:22:47,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:22:47,438 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:22:47,456 INFO L134 CoverageAnalysis]: Checked inductivity of 2029 backedges. 2 proven. 2025 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 09:22:47,456 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [466690371] [2020-10-28 09:22:47,456 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:22:47,457 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2020-10-28 09:22:47,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565491346] [2020-10-28 09:22:47,457 INFO L461 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-10-28 09:22:47,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:22:47,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-10-28 09:22:47,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2020-10-28 09:22:47,459 INFO L87 Difference]: Start difference. First operand 343 states and 389 transitions. Second operand 49 states. [2020-10-28 09:22:49,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:22:49,348 INFO L93 Difference]: Finished difference Result 598 states and 692 transitions. [2020-10-28 09:22:49,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-10-28 09:22:49,349 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 114 [2020-10-28 09:22:49,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:22:49,352 INFO L225 Difference]: With dead ends: 598 [2020-10-28 09:22:49,352 INFO L226 Difference]: Without dead ends: 352 [2020-10-28 09:22:49,353 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1179, Invalid=1271, Unknown=0, NotChecked=0, Total=2450 [2020-10-28 09:22:49,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2020-10-28 09:22:49,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 350. [2020-10-28 09:22:49,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 350 states. [2020-10-28 09:22:49,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 397 transitions. [2020-10-28 09:22:49,381 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 397 transitions. Word has length 114 [2020-10-28 09:22:49,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:22:49,381 INFO L481 AbstractCegarLoop]: Abstraction has 350 states and 397 transitions. [2020-10-28 09:22:49,381 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-10-28 09:22:49,381 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 397 transitions. [2020-10-28 09:22:49,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-10-28 09:22:49,382 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:22:49,382 INFO L422 BasicCegarLoop]: trace histogram [46, 46, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:22:49,382 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-28 09:22:49,382 INFO L429 AbstractCegarLoop]: === Iteration 49 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:22:49,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:22:49,383 INFO L82 PathProgramCache]: Analyzing trace with hash -1848022445, now seen corresponding path program 42 times [2020-10-28 09:22:49,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:22:49,383 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [88951720] [2020-10-28 09:22:49,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:22:49,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:22:49,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:50,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:54,423 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:22:54,424 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 128 [2020-10-28 09:22:54,424 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:22:54,424 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-28 09:22:54,424 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:22:54,424 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:22:54,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 48 [2020-10-28 09:22:54,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:22:54,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 94 [2020-10-28 09:22:54,425 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:22:56,259 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:22:56,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:22:56,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:56,266 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:22:56,266 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:22:56,266 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:22:56,266 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:22:56,266 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:22:56,266 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:22:56,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:22:56,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:22:56,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:22:56,267 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:22:56,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2020-10-28 09:22:56,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:22:56,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:56,270 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:22:56,270 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:22:56,270 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:22:56,270 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:22:56,270 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:22:56,270 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:22:56,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:22:56,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:22:56,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:22:56,271 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:22:56,284 INFO L134 CoverageAnalysis]: Checked inductivity of 2120 backedges. 2 proven. 2116 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 09:22:56,284 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [88951720] [2020-10-28 09:22:56,284 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:22:56,284 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2020-10-28 09:22:56,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136227727] [2020-10-28 09:22:56,284 INFO L461 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-10-28 09:22:56,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:22:56,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-10-28 09:22:56,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2020-10-28 09:22:56,285 INFO L87 Difference]: Start difference. First operand 350 states and 397 transitions. Second operand 50 states. [2020-10-28 09:22:58,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:22:58,192 INFO L93 Difference]: Finished difference Result 610 states and 706 transitions. [2020-10-28 09:22:58,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-10-28 09:22:58,193 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 116 [2020-10-28 09:22:58,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:22:58,198 INFO L225 Difference]: With dead ends: 610 [2020-10-28 09:22:58,198 INFO L226 Difference]: Without dead ends: 359 [2020-10-28 09:22:58,199 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1228, Invalid=1322, Unknown=0, NotChecked=0, Total=2550 [2020-10-28 09:22:58,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2020-10-28 09:22:58,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 357. [2020-10-28 09:22:58,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 357 states. [2020-10-28 09:22:58,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 405 transitions. [2020-10-28 09:22:58,215 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 405 transitions. Word has length 116 [2020-10-28 09:22:58,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:22:58,215 INFO L481 AbstractCegarLoop]: Abstraction has 357 states and 405 transitions. [2020-10-28 09:22:58,215 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-10-28 09:22:58,215 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 405 transitions. [2020-10-28 09:22:58,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-10-28 09:22:58,216 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:22:58,216 INFO L422 BasicCegarLoop]: trace histogram [47, 47, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:22:58,217 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-28 09:22:58,217 INFO L429 AbstractCegarLoop]: === Iteration 50 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:22:58,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:22:58,217 INFO L82 PathProgramCache]: Analyzing trace with hash 680765173, now seen corresponding path program 43 times [2020-10-28 09:22:58,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:22:58,218 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [897475555] [2020-10-28 09:22:58,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:22:58,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:22:58,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:59,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:23:03,264 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:23:03,265 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 130 [2020-10-28 09:23:03,265 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:23:03,265 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-28 09:23:03,265 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:23:03,265 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:23:03,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 49 [2020-10-28 09:23:03,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:23:03,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 96 [2020-10-28 09:23:03,265 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:23:05,173 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:23:05,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:23:05,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:23:05,180 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:23:05,180 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:23:05,180 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:23:05,180 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:23:05,180 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:23:05,181 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:23:05,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:23:05,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:23:05,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:23:05,181 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:23:05,183 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2020-10-28 09:23:05,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:23:05,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:23:05,185 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:23:05,186 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:23:05,186 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:23:05,186 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:23:05,186 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:23:05,186 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:23:05,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:23:05,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:23:05,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:23:05,187 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:23:05,205 INFO L134 CoverageAnalysis]: Checked inductivity of 2213 backedges. 2 proven. 2209 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 09:23:05,205 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [897475555] [2020-10-28 09:23:05,205 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:23:05,205 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51] total 51 [2020-10-28 09:23:05,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631292976] [2020-10-28 09:23:05,206 INFO L461 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-10-28 09:23:05,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:23:05,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-10-28 09:23:05,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1227, Invalid=1323, Unknown=0, NotChecked=0, Total=2550 [2020-10-28 09:23:05,207 INFO L87 Difference]: Start difference. First operand 357 states and 405 transitions. Second operand 51 states. [2020-10-28 09:23:07,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:23:07,715 INFO L93 Difference]: Finished difference Result 622 states and 720 transitions. [2020-10-28 09:23:07,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-10-28 09:23:07,716 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 118 [2020-10-28 09:23:07,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:23:07,718 INFO L225 Difference]: With dead ends: 622 [2020-10-28 09:23:07,719 INFO L226 Difference]: Without dead ends: 366 [2020-10-28 09:23:07,720 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1278, Invalid=1374, Unknown=0, NotChecked=0, Total=2652 [2020-10-28 09:23:07,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2020-10-28 09:23:07,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 364. [2020-10-28 09:23:07,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 364 states. [2020-10-28 09:23:07,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 413 transitions. [2020-10-28 09:23:07,739 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 413 transitions. Word has length 118 [2020-10-28 09:23:07,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:23:07,740 INFO L481 AbstractCegarLoop]: Abstraction has 364 states and 413 transitions. [2020-10-28 09:23:07,740 INFO L482 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-10-28 09:23:07,740 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 413 transitions. [2020-10-28 09:23:07,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2020-10-28 09:23:07,742 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:23:07,742 INFO L422 BasicCegarLoop]: trace histogram [48, 48, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:23:07,742 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-10-28 09:23:07,742 INFO L429 AbstractCegarLoop]: === Iteration 51 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:23:07,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:23:07,743 INFO L82 PathProgramCache]: Analyzing trace with hash -105823465, now seen corresponding path program 44 times [2020-10-28 09:23:07,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:23:07,744 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1836708621] [2020-10-28 09:23:07,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:23:07,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:23:07,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:23:08,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:23:12,441 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:23:12,441 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 132 [2020-10-28 09:23:12,441 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:23:12,441 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4649 [2020-10-28 09:23:12,441 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:23:12,441 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:23:12,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 50 [2020-10-28 09:23:12,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:23:12,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 98 [2020-10-28 09:23:12,442 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:23:14,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:23:14,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:23:14,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:23:14,422 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:23:14,423 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:23:14,423 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:23:14,423 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:23:14,423 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:23:14,423 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:23:14,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:23:14,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:23:14,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:23:14,423 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:23:14,425 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2020-10-28 09:23:14,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:23:14,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:23:14,426 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:23:14,427 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:23:14,427 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:23:14,427 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:23:14,427 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:23:14,427 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:23:14,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:23:14,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:23:14,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:23:14,427 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:23:14,440 INFO L134 CoverageAnalysis]: Checked inductivity of 2308 backedges. 2 proven. 2304 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 09:23:14,440 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1836708621] [2020-10-28 09:23:14,440 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:23:14,440 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2020-10-28 09:23:14,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136519822] [2020-10-28 09:23:14,441 INFO L461 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-10-28 09:23:14,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:23:14,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-10-28 09:23:14,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2020-10-28 09:23:14,442 INFO L87 Difference]: Start difference. First operand 364 states and 413 transitions. Second operand 52 states. [2020-10-28 09:23:16,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:23:16,844 INFO L93 Difference]: Finished difference Result 634 states and 734 transitions. [2020-10-28 09:23:16,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-10-28 09:23:16,845 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 120 [2020-10-28 09:23:16,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:23:16,847 INFO L225 Difference]: With dead ends: 634 [2020-10-28 09:23:16,847 INFO L226 Difference]: Without dead ends: 373 [2020-10-28 09:23:16,849 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1329, Invalid=1427, Unknown=0, NotChecked=0, Total=2756 [2020-10-28 09:23:16,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2020-10-28 09:23:16,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 371. [2020-10-28 09:23:16,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 371 states. [2020-10-28 09:23:16,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 421 transitions. [2020-10-28 09:23:16,862 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 421 transitions. Word has length 120 [2020-10-28 09:23:16,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:23:16,862 INFO L481 AbstractCegarLoop]: Abstraction has 371 states and 421 transitions. [2020-10-28 09:23:16,862 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-10-28 09:23:16,862 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 421 transitions. [2020-10-28 09:23:16,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-10-28 09:23:16,863 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:23:16,863 INFO L422 BasicCegarLoop]: trace histogram [49, 49, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:23:16,863 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-10-28 09:23:16,864 INFO L429 AbstractCegarLoop]: === Iteration 52 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:23:16,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:23:16,864 INFO L82 PathProgramCache]: Analyzing trace with hash -103260487, now seen corresponding path program 45 times [2020-10-28 09:23:16,864 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:23:16,864 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [857064315] [2020-10-28 09:23:16,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:23:16,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:23:16,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:23:17,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:23:22,027 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:23:22,027 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 134 [2020-10-28 09:23:22,027 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:23:22,027 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5128 [2020-10-28 09:23:22,028 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:23:22,028 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:23:22,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 51 [2020-10-28 09:23:22,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:23:22,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 100 [2020-10-28 09:23:22,028 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:23:24,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:23:24,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:23:24,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:23:24,087 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:23:24,087 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:23:24,087 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:23:24,087 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:23:24,087 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:23:24,087 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:23:24,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:23:24,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:23:24,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:23:24,088 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:23:24,089 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2020-10-28 09:23:24,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:23:24,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:23:24,091 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:23:24,091 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:23:24,091 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:23:24,091 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:23:24,091 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:23:24,091 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:23:24,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:23:24,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:23:24,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:23:24,092 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:23:24,105 INFO L134 CoverageAnalysis]: Checked inductivity of 2405 backedges. 2 proven. 2401 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 09:23:24,106 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [857064315] [2020-10-28 09:23:24,106 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:23:24,106 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2020-10-28 09:23:24,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841069691] [2020-10-28 09:23:24,106 INFO L461 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-10-28 09:23:24,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:23:24,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-10-28 09:23:24,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1328, Invalid=1428, Unknown=0, NotChecked=0, Total=2756 [2020-10-28 09:23:24,108 INFO L87 Difference]: Start difference. First operand 371 states and 421 transitions. Second operand 53 states. [2020-10-28 09:23:26,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:23:26,650 INFO L93 Difference]: Finished difference Result 646 states and 748 transitions. [2020-10-28 09:23:26,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-10-28 09:23:26,651 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 122 [2020-10-28 09:23:26,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:23:26,653 INFO L225 Difference]: With dead ends: 646 [2020-10-28 09:23:26,653 INFO L226 Difference]: Without dead ends: 380 [2020-10-28 09:23:26,654 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1381, Invalid=1481, Unknown=0, NotChecked=0, Total=2862 [2020-10-28 09:23:26,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2020-10-28 09:23:26,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 378. [2020-10-28 09:23:26,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 378 states. [2020-10-28 09:23:26,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 429 transitions. [2020-10-28 09:23:26,666 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 429 transitions. Word has length 122 [2020-10-28 09:23:26,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:23:26,666 INFO L481 AbstractCegarLoop]: Abstraction has 378 states and 429 transitions. [2020-10-28 09:23:26,666 INFO L482 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-10-28 09:23:26,666 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 429 transitions. [2020-10-28 09:23:26,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-10-28 09:23:26,667 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:23:26,667 INFO L422 BasicCegarLoop]: trace histogram [50, 50, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:23:26,667 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-10-28 09:23:26,667 INFO L429 AbstractCegarLoop]: === Iteration 53 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:23:26,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:23:26,668 INFO L82 PathProgramCache]: Analyzing trace with hash -1935205925, now seen corresponding path program 46 times [2020-10-28 09:23:26,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:23:26,668 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1636706313] [2020-10-28 09:23:26,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:23:26,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:23:26,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:23:27,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:23:31,707 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:23:31,708 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 136 [2020-10-28 09:23:31,708 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:23:31,708 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-28 09:23:31,708 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:23:31,708 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:23:31,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 52 [2020-10-28 09:23:31,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:23:31,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 102 [2020-10-28 09:23:31,708 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:23:33,841 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:23:33,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:23:33,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:23:33,847 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:23:33,847 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:23:33,847 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:23:33,847 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:23:33,847 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:23:33,847 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:23:33,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:23:33,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:23:33,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:23:33,847 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:23:33,849 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2020-10-28 09:23:33,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:23:33,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:23:33,850 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:23:33,851 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:23:33,851 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:23:33,851 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:23:33,851 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:23:33,851 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:23:33,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:23:33,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:23:33,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:23:33,851 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:23:33,865 INFO L134 CoverageAnalysis]: Checked inductivity of 2504 backedges. 2 proven. 2500 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 09:23:33,865 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1636706313] [2020-10-28 09:23:33,866 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:23:33,866 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54] total 54 [2020-10-28 09:23:33,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634972467] [2020-10-28 09:23:33,866 INFO L461 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-10-28 09:23:33,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:23:33,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-10-28 09:23:33,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2020-10-28 09:23:33,868 INFO L87 Difference]: Start difference. First operand 378 states and 429 transitions. Second operand 54 states. [2020-10-28 09:23:36,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:23:36,418 INFO L93 Difference]: Finished difference Result 658 states and 762 transitions. [2020-10-28 09:23:36,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-10-28 09:23:36,419 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 124 [2020-10-28 09:23:36,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:23:36,420 INFO L225 Difference]: With dead ends: 658 [2020-10-28 09:23:36,421 INFO L226 Difference]: Without dead ends: 387 [2020-10-28 09:23:36,422 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1434, Invalid=1536, Unknown=0, NotChecked=0, Total=2970 [2020-10-28 09:23:36,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2020-10-28 09:23:36,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 385. [2020-10-28 09:23:36,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 385 states. [2020-10-28 09:23:36,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 437 transitions. [2020-10-28 09:23:36,435 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 437 transitions. Word has length 124 [2020-10-28 09:23:36,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:23:36,435 INFO L481 AbstractCegarLoop]: Abstraction has 385 states and 437 transitions. [2020-10-28 09:23:36,435 INFO L482 AbstractCegarLoop]: Interpolant automaton has 54 states. [2020-10-28 09:23:36,435 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 437 transitions. [2020-10-28 09:23:36,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-10-28 09:23:36,436 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:23:36,436 INFO L422 BasicCegarLoop]: trace histogram [51, 51, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:23:36,436 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-10-28 09:23:36,436 INFO L429 AbstractCegarLoop]: === Iteration 54 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:23:36,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:23:36,437 INFO L82 PathProgramCache]: Analyzing trace with hash -1498180483, now seen corresponding path program 47 times [2020-10-28 09:23:36,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:23:36,437 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1581514394] [2020-10-28 09:23:36,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:23:36,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:23:36,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:23:37,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:23:41,481 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:23:41,481 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 138 [2020-10-28 09:23:41,482 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:23:41,482 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-28 09:23:41,482 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:23:41,482 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:23:41,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 53 [2020-10-28 09:23:41,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:23:41,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 104 [2020-10-28 09:23:41,482 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0