/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/loops/heavy-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 15:15:07,998 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 15:15:08,001 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 15:15:08,035 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 15:15:08,036 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 15:15:08,038 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 15:15:08,039 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 15:15:08,042 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 15:15:08,044 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 15:15:08,045 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 15:15:08,047 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 15:15:08,048 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 15:15:08,049 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 15:15:08,050 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 15:15:08,051 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 15:15:08,053 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 15:15:08,054 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 15:15:08,055 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 15:15:08,057 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 15:15:08,059 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 15:15:08,061 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 15:15:08,064 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 15:15:08,066 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 15:15:08,067 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 15:15:08,083 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 15:15:08,083 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 15:15:08,083 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 15:15:08,085 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 15:15:08,085 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 15:15:08,086 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 15:15:08,087 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 15:15:08,088 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 15:15:08,089 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 15:15:08,090 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 15:15:08,091 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 15:15:08,092 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 15:15:08,093 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 15:15:08,093 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 15:15:08,094 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 15:15:08,095 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 15:15:08,096 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 15:15:08,099 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 15:15:08,126 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 15:15:08,126 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 15:15:08,128 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 15:15:08,128 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 15:15:08,129 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 15:15:08,129 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 15:15:08,129 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 15:15:08,130 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 15:15:08,130 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 15:15:08,130 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 15:15:08,130 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 15:15:08,131 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 15:15:08,131 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 15:15:08,131 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 15:15:08,131 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 15:15:08,132 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 15:15:08,132 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 15:15:08,132 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 15:15:08,133 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 15:15:08,133 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 15:15:08,133 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 15:15:08,134 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 15:15:08,134 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 15:15:08,134 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 15:15:08,135 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 15:15:08,135 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 15:15:08,135 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 15:15:08,135 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 15:15:08,136 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 15:15:08,136 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 15:15:08,518 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 15:15:08,548 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 15:15:08,551 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 15:15:08,553 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 15:15:08,554 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 15:15:08,555 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/heavy-1.c [2020-10-28 15:15:08,633 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d1f8225ea/d324229728e44964a524736b6dcda6d9/FLAG12a8f7f83 [2020-10-28 15:15:09,246 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 15:15:09,247 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/heavy-1.c [2020-10-28 15:15:09,254 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d1f8225ea/d324229728e44964a524736b6dcda6d9/FLAG12a8f7f83 [2020-10-28 15:15:09,605 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d1f8225ea/d324229728e44964a524736b6dcda6d9 [2020-10-28 15:15:09,608 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 15:15:09,618 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 15:15:09,622 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 15:15:09,622 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 15:15:09,627 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 15:15:09,628 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 03:15:09" (1/1) ... [2020-10-28 15:15:09,634 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4fbafd81 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:15:09, skipping insertion in model container [2020-10-28 15:15:09,635 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 03:15:09" (1/1) ... [2020-10-28 15:15:09,643 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 15:15:09,660 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 15:15:09,827 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 15:15:09,892 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 15:15:09,918 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 15:15:09,994 INFO L208 MainTranslator]: Completed translation [2020-10-28 15:15:09,994 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:15:09 WrapperNode [2020-10-28 15:15:09,994 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 15:15:09,996 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 15:15:09,996 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 15:15:09,996 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 15:15:10,010 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:15:09" (1/1) ... [2020-10-28 15:15:10,010 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:15:09" (1/1) ... [2020-10-28 15:15:10,019 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:15:09" (1/1) ... [2020-10-28 15:15:10,019 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:15:09" (1/1) ... [2020-10-28 15:15:10,027 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:15:09" (1/1) ... [2020-10-28 15:15:10,032 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:15:09" (1/1) ... [2020-10-28 15:15:10,034 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:15:09" (1/1) ... [2020-10-28 15:15:10,037 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 15:15:10,038 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 15:15:10,038 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 15:15:10,038 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 15:15:10,039 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:15:09" (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 15:15:10,113 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 15:15:10,113 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 15:15:10,114 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 15:15:10,114 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 15:15:10,114 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 15:15:10,114 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 15:15:10,114 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 15:15:10,114 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 15:15:10,115 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 15:15:10,115 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 15:15:10,115 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 15:15:10,115 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 15:15:10,115 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 15:15:10,115 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2020-10-28 15:15:10,116 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 15:15:10,116 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 15:15:10,373 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 15:15:10,374 INFO L298 CfgBuilder]: Removed 3 assume(true) statements. [2020-10-28 15:15:10,376 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 03:15:10 BoogieIcfgContainer [2020-10-28 15:15:10,376 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 15:15:10,378 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 15:15:10,378 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 15:15:10,381 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 15:15:10,382 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 03:15:09" (1/3) ... [2020-10-28 15:15:10,383 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3827e247 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 03:15:10, skipping insertion in model container [2020-10-28 15:15:10,383 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:15:09" (2/3) ... [2020-10-28 15:15:10,384 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3827e247 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 03:15:10, skipping insertion in model container [2020-10-28 15:15:10,384 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 03:15:10" (3/3) ... [2020-10-28 15:15:10,386 INFO L111 eAbstractionObserver]: Analyzing ICFG heavy-1.c [2020-10-28 15:15:10,411 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 15:15:10,422 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 15:15:10,462 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 15:15:10,504 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 15:15:10,504 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 15:15:10,504 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 15:15:10,505 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 15:15:10,505 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 15:15:10,505 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 15:15:10,505 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 15:15:10,505 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 15:15:10,526 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2020-10-28 15:15:10,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-28 15:15:10,533 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:15:10,533 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:15:10,534 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:15:10,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:15:10,541 INFO L82 PathProgramCache]: Analyzing trace with hash 910173467, now seen corresponding path program 1 times [2020-10-28 15:15:10,551 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:15:10,552 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [954461748] [2020-10-28 15:15:10,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:15:10,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:15:10,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:15:10,819 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:15:10,822 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-28 15:15:10,823 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:15:10,823 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 118 [2020-10-28 15:15:10,826 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:15:10,826 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:15:10,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:15:10,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 15:15:10,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:15:10,827 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 15:15:11,015 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:15:11,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:15:11,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:15:11,073 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:15:11,073 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:15:11,073 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:15:11,074 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 42 [2020-10-28 15:15:11,074 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:15:11,076 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:15:11,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:15:11,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:15:11,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:15:11,078 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 15:15:11,103 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 15:15:11,104 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [954461748] [2020-10-28 15:15:11,106 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 15:15:11,106 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-28 15:15:11,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349198682] [2020-10-28 15:15:11,115 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-28 15:15:11,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:15:11,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-28 15:15:11,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-28 15:15:11,133 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 3 states. [2020-10-28 15:15:11,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:15:11,233 INFO L93 Difference]: Finished difference Result 46 states and 67 transitions. [2020-10-28 15:15:11,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-28 15:15:11,235 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2020-10-28 15:15:11,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:15:11,244 INFO L225 Difference]: With dead ends: 46 [2020-10-28 15:15:11,244 INFO L226 Difference]: Without dead ends: 23 [2020-10-28 15:15:11,247 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-28 15:15:11,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-10-28 15:15:11,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 16. [2020-10-28 15:15:11,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-10-28 15:15:11,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2020-10-28 15:15:11,286 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 10 [2020-10-28 15:15:11,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:15:11,287 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2020-10-28 15:15:11,287 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-28 15:15:11,287 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2020-10-28 15:15:11,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-28 15:15:11,288 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:15:11,288 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:15:11,289 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 15:15:11,289 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:15:11,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:15:11,290 INFO L82 PathProgramCache]: Analyzing trace with hash 909279737, now seen corresponding path program 1 times [2020-10-28 15:15:11,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:15:11,291 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [129601510] [2020-10-28 15:15:11,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:15:11,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:15:11,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:15:11,417 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:15:11,418 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-28 15:15:11,419 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:15:11,420 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 101 [2020-10-28 15:15:11,420 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:15:11,420 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:15:11,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 15:15:11,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:15:11,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 15:15:11,422 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:15:11,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:15:11,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:15:11,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:15:11,562 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:15:11,563 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:15:11,563 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:15:11,563 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-28 15:15:11,563 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:15:11,563 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:15:11,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:15:11,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:15:11,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:15:11,564 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:15:11,581 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 15:15:11,582 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [129601510] [2020-10-28 15:15:11,582 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 15:15:11,582 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 15:15:11,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493443091] [2020-10-28 15:15:11,587 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 15:15:11,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:15:11,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 15:15:11,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 15:15:11,589 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 4 states. [2020-10-28 15:15:11,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:15:11,721 INFO L93 Difference]: Finished difference Result 37 states and 46 transitions. [2020-10-28 15:15:11,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 15:15:11,722 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2020-10-28 15:15:11,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:15:11,723 INFO L225 Difference]: With dead ends: 37 [2020-10-28 15:15:11,723 INFO L226 Difference]: Without dead ends: 33 [2020-10-28 15:15:11,724 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 15:15:11,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-28 15:15:11,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 17. [2020-10-28 15:15:11,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-10-28 15:15:11,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2020-10-28 15:15:11,732 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 10 [2020-10-28 15:15:11,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:15:11,732 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2020-10-28 15:15:11,732 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 15:15:11,732 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2020-10-28 15:15:11,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-28 15:15:11,733 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:15:11,733 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:15:11,733 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 15:15:11,734 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:15:11,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:15:11,735 INFO L82 PathProgramCache]: Analyzing trace with hash 1010247195, now seen corresponding path program 1 times [2020-10-28 15:15:11,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:15:11,735 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [635800907] [2020-10-28 15:15:11,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:15:11,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:15:11,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:15:11,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:15:12,018 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:15:12,019 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-28 15:15:12,019 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:15:12,019 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 266 [2020-10-28 15:15:12,020 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:15:12,020 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:15:12,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 15:15:12,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:15:12,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-28 15:15:12,021 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:15:12,093 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:15:12,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:15:12,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:15:12,107 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:15:12,107 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:15:12,107 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:15:12,108 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 15:15:12,108 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:15:12,108 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:15:12,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:15:12,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:15:12,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:15:12,109 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:15:12,114 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 15:15:12,114 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [635800907] [2020-10-28 15:15:12,115 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:15:12,115 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 15:15:12,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220234322] [2020-10-28 15:15:12,115 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 15:15:12,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:15:12,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 15:15:12,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 15:15:12,117 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand 5 states. [2020-10-28 15:15:12,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:15:12,299 INFO L93 Difference]: Finished difference Result 48 states and 62 transitions. [2020-10-28 15:15:12,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 15:15:12,299 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-10-28 15:15:12,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:15:12,301 INFO L225 Difference]: With dead ends: 48 [2020-10-28 15:15:12,301 INFO L226 Difference]: Without dead ends: 44 [2020-10-28 15:15:12,302 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-28 15:15:12,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-28 15:15:12,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 23. [2020-10-28 15:15:12,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-28 15:15:12,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2020-10-28 15:15:12,310 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 13 [2020-10-28 15:15:12,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:15:12,311 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2020-10-28 15:15:12,311 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 15:15:12,311 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2020-10-28 15:15:12,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-28 15:15:12,312 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:15:12,312 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:15:12,312 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 15:15:12,327 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:15:12,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:15:12,329 INFO L82 PathProgramCache]: Analyzing trace with hash -1840286023, now seen corresponding path program 2 times [2020-10-28 15:15:12,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:15:12,330 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [47096640] [2020-10-28 15:15:12,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:15:12,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:15:12,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:15:12,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:15:12,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:15:12,878 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:15:12,879 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-28 15:15:12,879 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 15:15:12,879 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 501 [2020-10-28 15:15:12,879 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:15:12,879 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:15:12,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 15:15:12,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 15:15:12,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 15:15:12,880 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:15:12,963 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:15:12,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:15:12,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:15:12,980 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:15:12,981 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:15:12,981 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:15:12,981 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 15:15:12,982 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:15:12,983 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:15:12,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:15:12,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:15:12,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:15:12,986 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-28 15:15:12,996 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 15:15:12,997 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [47096640] [2020-10-28 15:15:12,997 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 15:15:12,997 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 15:15:12,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209541154] [2020-10-28 15:15:13,000 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 15:15:13,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:15:13,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 15:15:13,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 15:15:13,009 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand 4 states. [2020-10-28 15:15:13,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:15:13,251 INFO L93 Difference]: Finished difference Result 60 states and 78 transitions. [2020-10-28 15:15:13,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 15:15:13,252 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2020-10-28 15:15:13,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:15:13,253 INFO L225 Difference]: With dead ends: 60 [2020-10-28 15:15:13,253 INFO L226 Difference]: Without dead ends: 48 [2020-10-28 15:15:13,254 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 15:15:13,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-28 15:15:13,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 25. [2020-10-28 15:15:13,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-28 15:15:13,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2020-10-28 15:15:13,262 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 16 [2020-10-28 15:15:13,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:15:13,263 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2020-10-28 15:15:13,263 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 15:15:13,263 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2020-10-28 15:15:13,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-28 15:15:13,264 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:15:13,264 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:15:13,264 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 15:15:13,264 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:15:13,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:15:13,265 INFO L82 PathProgramCache]: Analyzing trace with hash -118905151, now seen corresponding path program 1 times [2020-10-28 15:15:13,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:15:13,265 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1365405380] [2020-10-28 15:15:13,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:15:13,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:15:13,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:15:13,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:15:13,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:15:13,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:15:13,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:15:16,697 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:15:16,697 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-28 15:15:16,698 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 15:15:16,698 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3418 [2020-10-28 15:15:16,698 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:15:16,698 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:15:16,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 15:15:16,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-28 15:15:16,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-28 15:15:16,699 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:15:16,797 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:15:16,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:15:16,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:15:16,807 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:15:16,807 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:15:16,808 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:15:16,808 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 15:15:16,808 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:15:16,808 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:15:16,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:15:16,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:15:16,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:15:16,809 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:15:16,815 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 15:15:16,816 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1365405380] [2020-10-28 15:15:16,816 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:15:16,816 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 15:15:16,816 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082049551] [2020-10-28 15:15:16,817 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 15:15:16,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:15:16,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 15:15:16,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 15:15:16,831 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand 5 states. [2020-10-28 15:15:17,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:15:17,079 INFO L93 Difference]: Finished difference Result 75 states and 98 transitions. [2020-10-28 15:15:17,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 15:15:17,080 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2020-10-28 15:15:17,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:15:17,081 INFO L225 Difference]: With dead ends: 75 [2020-10-28 15:15:17,081 INFO L226 Difference]: Without dead ends: 62 [2020-10-28 15:15:17,083 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-28 15:15:17,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-28 15:15:17,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 33. [2020-10-28 15:15:17,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-28 15:15:17,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 39 transitions. [2020-10-28 15:15:17,094 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 39 transitions. Word has length 22 [2020-10-28 15:15:17,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:15:17,094 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 39 transitions. [2020-10-28 15:15:17,094 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 15:15:17,095 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 39 transitions. [2020-10-28 15:15:17,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-28 15:15:17,096 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:15:17,096 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:15:17,096 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 15:15:17,096 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:15:17,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:15:17,097 INFO L82 PathProgramCache]: Analyzing trace with hash 1406853177, now seen corresponding path program 2 times [2020-10-28 15:15:17,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:15:17,097 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [702362750] [2020-10-28 15:15:17,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:15:17,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:15:17,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:15:17,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:15:17,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:15:17,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:15:17,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:15:17,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:15:18,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:15:22,114 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:15:22,114 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-28 15:15:22,114 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 15:15:22,115 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-28 15:15:22,116 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:15:22,116 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:15:22,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 15:15:22,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-28 15:15:22,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 15:15:22,116 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:15:22,190 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:15:22,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:15:22,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:15:22,202 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:15:22,203 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:15:22,203 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:15:22,203 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 15:15:22,203 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:15:22,203 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:15:22,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:15:22,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:15:22,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:15:22,204 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:15:22,220 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-10-28 15:15:22,221 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [702362750] [2020-10-28 15:15:22,223 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 15:15:22,223 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 15:15:22,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609054409] [2020-10-28 15:15:22,225 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 15:15:22,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:15:22,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 15:15:22,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 15:15:22,227 INFO L87 Difference]: Start difference. First operand 33 states and 39 transitions. Second operand 4 states. [2020-10-28 15:15:22,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:15:22,359 INFO L93 Difference]: Finished difference Result 64 states and 79 transitions. [2020-10-28 15:15:22,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 15:15:22,360 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 28 [2020-10-28 15:15:22,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:15:22,361 INFO L225 Difference]: With dead ends: 64 [2020-10-28 15:15:22,361 INFO L226 Difference]: Without dead ends: 41 [2020-10-28 15:15:22,361 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 15:15:22,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-28 15:15:22,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 37. [2020-10-28 15:15:22,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-28 15:15:22,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 43 transitions. [2020-10-28 15:15:22,385 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 43 transitions. Word has length 28 [2020-10-28 15:15:22,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:15:22,386 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 43 transitions. [2020-10-28 15:15:22,386 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 15:15:22,386 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 43 transitions. [2020-10-28 15:15:22,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-28 15:15:22,390 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:15:22,390 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:15:22,390 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 15:15:22,390 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:15:22,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:15:22,391 INFO L82 PathProgramCache]: Analyzing trace with hash 582211897, now seen corresponding path program 1 times [2020-10-28 15:15:22,391 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:15:22,391 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1731934826] [2020-10-28 15:15:22,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:15:22,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:15:22,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:15:22,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:15:22,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:15:22,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:15:24,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:15:24,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:15:27,438 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:15:27,438 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-28 15:15:27,438 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 15:15:27,438 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-28 15:15:27,439 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:15:27,439 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:15:27,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 15:15:27,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 15:15:27,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-28 15:15:27,440 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:15:27,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:15:27,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:15:27,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:15:27,574 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:15:27,574 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:15:27,574 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:15:27,575 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 15:15:27,575 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:15:27,575 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:15:27,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:15:27,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:15:27,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:15:27,576 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:15:27,583 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 35 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-28 15:15:27,584 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1731934826] [2020-10-28 15:15:27,585 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:15:27,585 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 15:15:27,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033908640] [2020-10-28 15:15:27,587 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 15:15:27,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:15:27,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 15:15:27,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-28 15:15:27,589 INFO L87 Difference]: Start difference. First operand 37 states and 43 transitions. Second operand 6 states. [2020-10-28 15:15:27,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:15:27,745 INFO L93 Difference]: Finished difference Result 74 states and 89 transitions. [2020-10-28 15:15:27,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 15:15:27,746 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 36 [2020-10-28 15:15:27,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:15:27,747 INFO L225 Difference]: With dead ends: 74 [2020-10-28 15:15:27,747 INFO L226 Difference]: Without dead ends: 55 [2020-10-28 15:15:27,748 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-10-28 15:15:27,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-28 15:15:27,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 47. [2020-10-28 15:15:27,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-28 15:15:27,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2020-10-28 15:15:27,770 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 36 [2020-10-28 15:15:27,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:15:27,771 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2020-10-28 15:15:27,771 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 15:15:27,771 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2020-10-28 15:15:27,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-28 15:15:27,775 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:15:27,775 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:15:27,775 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 15:15:27,776 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:15:27,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:15:27,776 INFO L82 PathProgramCache]: Analyzing trace with hash -1216446779, now seen corresponding path program 2 times [2020-10-28 15:15:27,776 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:15:27,777 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [481950092] [2020-10-28 15:15:27,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:15:27,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:15:27,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:15:27,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:15:27,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:15:27,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:15:27,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:15:30,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:15:32,857 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:15:32,858 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-28 15:15:32,858 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 15:15:32,858 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5039 [2020-10-28 15:15:32,858 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:15:32,858 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:15:32,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 15:15:32,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-28 15:15:32,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-28 15:15:32,859 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:15:32,984 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:15:32,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:15:32,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:15:32,992 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:15:32,993 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:15:32,993 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:15:32,993 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 15:15:32,993 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:15:32,993 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:15:32,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:15:32,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:15:32,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:15:32,994 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:15:33,001 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 80 proven. 1 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2020-10-28 15:15:33,001 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [481950092] [2020-10-28 15:15:33,002 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:15:33,002 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 15:15:33,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869777616] [2020-10-28 15:15:33,003 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 15:15:33,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:15:33,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 15:15:33,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 15:15:33,005 INFO L87 Difference]: Start difference. First operand 47 states and 55 transitions. Second operand 5 states. [2020-10-28 15:15:33,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:15:33,129 INFO L93 Difference]: Finished difference Result 101 states and 122 transitions. [2020-10-28 15:15:33,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 15:15:33,129 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 46 [2020-10-28 15:15:33,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:15:33,130 INFO L225 Difference]: With dead ends: 101 [2020-10-28 15:15:33,131 INFO L226 Difference]: Without dead ends: 65 [2020-10-28 15:15:33,133 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-28 15:15:33,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-28 15:15:33,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 59. [2020-10-28 15:15:33,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-28 15:15:33,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 67 transitions. [2020-10-28 15:15:33,159 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 67 transitions. Word has length 46 [2020-10-28 15:15:33,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:15:33,161 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 67 transitions. [2020-10-28 15:15:33,161 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 15:15:33,161 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 67 transitions. [2020-10-28 15:15:33,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-28 15:15:33,164 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:15:33,164 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 6, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:15:33,164 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 15:15:33,165 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:15:33,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:15:33,166 INFO L82 PathProgramCache]: Analyzing trace with hash -869376695, now seen corresponding path program 3 times [2020-10-28 15:15:33,168 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:15:33,169 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [709785361] [2020-10-28 15:15:33,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:15:33,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:15:33,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:15:33,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:15:33,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:15:33,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:15:33,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:15:38,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:15:38,372 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:15:38,372 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-28 15:15:38,372 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 15:15:38,372 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5143 [2020-10-28 15:15:38,373 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:15:38,373 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:15:38,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 15:15:38,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 15:15:38,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-28 15:15:38,373 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:15:38,510 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:15:38,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:15:38,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:15:38,518 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:15:38,519 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:15:38,519 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:15:38,519 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 15:15:38,519 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:15:38,519 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:15:38,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:15:38,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:15:38,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:15:38,521 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:15:38,534 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 144 proven. 48 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2020-10-28 15:15:38,536 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [709785361] [2020-10-28 15:15:38,536 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:15:38,536 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 15:15:38,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149791794] [2020-10-28 15:15:38,537 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 15:15:38,537 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:15:38,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 15:15:38,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 15:15:38,538 INFO L87 Difference]: Start difference. First operand 59 states and 67 transitions. Second operand 7 states. [2020-10-28 15:15:38,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:15:38,733 INFO L93 Difference]: Finished difference Result 115 states and 133 transitions. [2020-10-28 15:15:38,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 15:15:38,734 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 58 [2020-10-28 15:15:38,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:15:38,735 INFO L225 Difference]: With dead ends: 115 [2020-10-28 15:15:38,735 INFO L226 Difference]: Without dead ends: 85 [2020-10-28 15:15:38,736 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-28 15:15:38,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-28 15:15:38,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 73. [2020-10-28 15:15:38,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-28 15:15:38,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 83 transitions. [2020-10-28 15:15:38,769 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 83 transitions. Word has length 58 [2020-10-28 15:15:38,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:15:38,769 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 83 transitions. [2020-10-28 15:15:38,770 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 15:15:38,770 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 83 transitions. [2020-10-28 15:15:38,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-28 15:15:38,774 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:15:38,774 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 8, 8, 8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:15:38,775 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 15:15:38,775 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:15:38,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:15:38,776 INFO L82 PathProgramCache]: Analyzing trace with hash -1194381895, now seen corresponding path program 4 times [2020-10-28 15:15:38,776 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:15:38,776 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1816581019] [2020-10-28 15:15:38,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:15:38,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:15:38,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:15:38,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:15:39,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:15:39,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:15:39,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:15:40,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:15:44,008 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:15:44,009 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-28 15:15:44,010 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 15:15:44,010 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5167 [2020-10-28 15:15:44,010 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:15:44,010 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:15:44,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 15:15:44,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 15:15:44,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-28 15:15:44,011 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:15:44,195 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:15:44,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:15:44,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:15:44,206 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:15:44,206 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:15:44,207 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:15:44,207 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 15:15:44,207 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:15:44,207 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:15:44,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:15:44,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:15:44,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:15:44,208 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:15:44,224 INFO L134 CoverageAnalysis]: Checked inductivity of 473 backedges. 251 proven. 94 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2020-10-28 15:15:44,224 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1816581019] [2020-10-28 15:15:44,225 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:15:44,225 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 15:15:44,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304963441] [2020-10-28 15:15:44,227 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 15:15:44,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:15:44,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 15:15:44,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-28 15:15:44,228 INFO L87 Difference]: Start difference. First operand 73 states and 83 transitions. Second operand 8 states. [2020-10-28 15:15:44,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:15:44,443 INFO L93 Difference]: Finished difference Result 136 states and 157 transitions. [2020-10-28 15:15:44,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 15:15:44,444 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 72 [2020-10-28 15:15:44,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:15:44,445 INFO L225 Difference]: With dead ends: 136 [2020-10-28 15:15:44,445 INFO L226 Difference]: Without dead ends: 99 [2020-10-28 15:15:44,446 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-10-28 15:15:44,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-28 15:15:44,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 87. [2020-10-28 15:15:44,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-28 15:15:44,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 99 transitions. [2020-10-28 15:15:44,472 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 99 transitions. Word has length 72 [2020-10-28 15:15:44,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:15:44,473 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 99 transitions. [2020-10-28 15:15:44,473 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 15:15:44,474 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 99 transitions. [2020-10-28 15:15:44,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-10-28 15:15:44,481 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:15:44,482 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 10, 10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:15:44,482 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 15:15:44,482 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:15:44,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:15:44,483 INFO L82 PathProgramCache]: Analyzing trace with hash 542436553, now seen corresponding path program 5 times [2020-10-28 15:15:44,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:15:44,483 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [719059490] [2020-10-28 15:15:44,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:15:44,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:15:44,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:15:44,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:15:44,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:15:44,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:15:44,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:15:44,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:15:46,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:15:49,623 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:15:49,624 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-28 15:15:49,624 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 15:15:49,624 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5082 [2020-10-28 15:15:49,624 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:15:49,625 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:15:49,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 15:15:49,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 15:15:49,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 15:15:49,625 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:15:49,754 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:15:49,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:15:49,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:15:49,763 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:15:49,763 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:15:49,763 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:15:49,764 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 15:15:49,765 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:15:49,765 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:15:49,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:15:49,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:15:49,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:15:49,766 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:15:49,782 INFO L134 CoverageAnalysis]: Checked inductivity of 740 backedges. 252 proven. 4 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2020-10-28 15:15:49,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [719059490] [2020-10-28 15:15:49,783 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:15:49,783 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 15:15:49,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728067514] [2020-10-28 15:15:49,785 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 15:15:49,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:15:49,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 15:15:49,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-28 15:15:49,786 INFO L87 Difference]: Start difference. First operand 87 states and 99 transitions. Second operand 6 states. [2020-10-28 15:15:49,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:15:49,917 INFO L93 Difference]: Finished difference Result 191 states and 224 transitions. [2020-10-28 15:15:49,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 15:15:49,918 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 86 [2020-10-28 15:15:49,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:15:49,921 INFO L225 Difference]: With dead ends: 191 [2020-10-28 15:15:49,921 INFO L226 Difference]: Without dead ends: 117 [2020-10-28 15:15:49,923 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-10-28 15:15:49,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-28 15:15:49,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 107. [2020-10-28 15:15:49,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-10-28 15:15:49,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 119 transitions. [2020-10-28 15:15:49,952 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 119 transitions. Word has length 86 [2020-10-28 15:15:49,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:15:49,953 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 119 transitions. [2020-10-28 15:15:49,953 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 15:15:49,953 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 119 transitions. [2020-10-28 15:15:49,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-10-28 15:15:49,955 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:15:49,956 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 10, 10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:15:49,956 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 15:15:49,956 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:15:49,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:15:49,957 INFO L82 PathProgramCache]: Analyzing trace with hash -10572467, now seen corresponding path program 6 times [2020-10-28 15:15:49,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:15:49,957 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [657324953] [2020-10-28 15:15:49,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:15:50,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:15:50,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:15:50,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:15:50,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:15:50,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:15:50,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:15:50,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:15:52,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:15:55,102 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:15:55,102 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 114 [2020-10-28 15:15:55,103 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 15:15:55,103 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5055 [2020-10-28 15:15:55,103 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:15:55,103 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:15:55,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 15:15:55,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 15:15:55,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-28 15:15:55,103 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:15:55,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:15:55,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:15:55,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:15:55,319 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:15:55,319 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:15:55,320 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:15:55,320 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 15:15:55,320 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:15:55,321 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:15:55,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:15:55,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:15:55,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:15:55,321 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:15:55,355 INFO L134 CoverageAnalysis]: Checked inductivity of 1330 backedges. 688 proven. 275 refuted. 0 times theorem prover too weak. 367 trivial. 0 not checked. [2020-10-28 15:15:55,356 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [657324953] [2020-10-28 15:15:55,356 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:15:55,356 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-28 15:15:55,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578412722] [2020-10-28 15:15:55,357 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 15:15:55,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:15:55,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 15:15:55,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-10-28 15:15:55,359 INFO L87 Difference]: Start difference. First operand 107 states and 119 transitions. Second operand 9 states. [2020-10-28 15:15:55,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:15:55,663 INFO L93 Difference]: Finished difference Result 195 states and 219 transitions. [2020-10-28 15:15:55,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 15:15:55,664 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 106 [2020-10-28 15:15:55,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:15:55,665 INFO L225 Difference]: With dead ends: 195 [2020-10-28 15:15:55,665 INFO L226 Difference]: Without dead ends: 141 [2020-10-28 15:15:55,666 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-10-28 15:15:55,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-10-28 15:15:55,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 125. [2020-10-28 15:15:55,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-10-28 15:15:55,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 139 transitions. [2020-10-28 15:15:55,695 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 139 transitions. Word has length 106 [2020-10-28 15:15:55,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:15:55,695 INFO L481 AbstractCegarLoop]: Abstraction has 125 states and 139 transitions. [2020-10-28 15:15:55,695 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 15:15:55,695 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 139 transitions. [2020-10-28 15:15:55,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-10-28 15:15:55,703 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:15:55,703 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 12, 12, 12, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:15:55,703 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 15:15:55,703 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:15:55,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:15:55,704 INFO L82 PathProgramCache]: Analyzing trace with hash -1183157191, now seen corresponding path program 7 times [2020-10-28 15:15:55,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:15:55,704 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1392658363] [2020-10-28 15:15:55,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:15:55,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:15:55,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:15:55,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:15:56,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:15:56,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:15:56,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:15:56,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:15:56,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:16:01,154 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:16:01,154 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 132 [2020-10-28 15:16:01,154 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 15:16:01,154 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5369 [2020-10-28 15:16:01,154 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:16:01,154 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:16:01,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 15:16:01,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 15:16:01,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-28 15:16:01,155 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:16:01,355 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:16:01,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:16:01,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:16:01,362 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:16:01,362 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:16:01,363 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:16:01,363 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 15:16:01,363 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:16:01,363 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:16:01,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:16:01,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:16:01,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:16:01,364 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:16:01,396 INFO L134 CoverageAnalysis]: Checked inductivity of 1919 backedges. 987 proven. 411 refuted. 0 times theorem prover too weak. 521 trivial. 0 not checked. [2020-10-28 15:16:01,397 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1392658363] [2020-10-28 15:16:01,397 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:16:01,397 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 15:16:01,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241210952] [2020-10-28 15:16:01,398 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 15:16:01,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:16:01,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 15:16:01,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-28 15:16:01,403 INFO L87 Difference]: Start difference. First operand 125 states and 139 transitions. Second operand 10 states. [2020-10-28 15:16:01,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:16:01,709 INFO L93 Difference]: Finished difference Result 222 states and 249 transitions. [2020-10-28 15:16:01,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 15:16:01,709 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 124 [2020-10-28 15:16:01,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:16:01,711 INFO L225 Difference]: With dead ends: 222 [2020-10-28 15:16:01,711 INFO L226 Difference]: Without dead ends: 159 [2020-10-28 15:16:01,715 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-10-28 15:16:01,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-10-28 15:16:01,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 143. [2020-10-28 15:16:01,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-28 15:16:01,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 159 transitions. [2020-10-28 15:16:01,748 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 159 transitions. Word has length 124 [2020-10-28 15:16:01,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:16:01,748 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 159 transitions. [2020-10-28 15:16:01,749 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 15:16:01,749 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 159 transitions. [2020-10-28 15:16:01,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2020-10-28 15:16:01,750 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:16:01,750 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 14, 14, 14, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:16:01,750 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-28 15:16:01,750 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:16:01,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:16:01,751 INFO L82 PathProgramCache]: Analyzing trace with hash -2010848051, now seen corresponding path program 8 times [2020-10-28 15:16:01,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:16:01,751 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [940663359] [2020-10-28 15:16:01,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:16:01,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:16:01,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:16:02,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:16:02,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:16:02,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:16:02,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:16:02,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:16:02,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:16:04,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:16:06,858 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:16:06,858 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 150 [2020-10-28 15:16:06,858 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 15:16:06,859 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-28 15:16:06,859 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:16:06,859 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:16:06,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 15:16:06,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 49 [2020-10-28 15:16:06,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-28 15:16:06,859 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:16:06,994 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:16:06,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:16:06,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:16:07,003 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:16:07,003 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:16:07,003 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:16:07,003 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 15:16:07,003 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:16:07,003 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:16:07,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:16:07,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:16:07,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:16:07,004 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:16:07,027 INFO L134 CoverageAnalysis]: Checked inductivity of 2616 backedges. 1322 proven. 9 refuted. 0 times theorem prover too weak. 1285 trivial. 0 not checked. [2020-10-28 15:16:07,027 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [940663359] [2020-10-28 15:16:07,027 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:16:07,027 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 15:16:07,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37770394] [2020-10-28 15:16:07,028 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 15:16:07,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:16:07,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 15:16:07,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 15:16:07,029 INFO L87 Difference]: Start difference. First operand 143 states and 159 transitions. Second operand 7 states. [2020-10-28 15:16:07,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:16:07,190 INFO L93 Difference]: Finished difference Result 313 states and 358 transitions. [2020-10-28 15:16:07,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 15:16:07,190 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 142 [2020-10-28 15:16:07,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:16:07,192 INFO L225 Difference]: With dead ends: 313 [2020-10-28 15:16:07,192 INFO L226 Difference]: Without dead ends: 185 [2020-10-28 15:16:07,193 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-28 15:16:07,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2020-10-28 15:16:07,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 171. [2020-10-28 15:16:07,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2020-10-28 15:16:07,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 187 transitions. [2020-10-28 15:16:07,230 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 187 transitions. Word has length 142 [2020-10-28 15:16:07,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:16:07,230 INFO L481 AbstractCegarLoop]: Abstraction has 171 states and 187 transitions. [2020-10-28 15:16:07,230 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 15:16:07,230 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 187 transitions. [2020-10-28 15:16:07,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2020-10-28 15:16:07,232 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:16:07,232 INFO L422 BasicCegarLoop]: trace histogram [56, 56, 14, 14, 14, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:16:07,232 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-28 15:16:07,232 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:16:07,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:16:07,233 INFO L82 PathProgramCache]: Analyzing trace with hash 15212369, now seen corresponding path program 9 times [2020-10-28 15:16:07,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:16:07,233 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1938574460] [2020-10-28 15:16:07,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:16:07,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:16:07,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:16:07,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:16:07,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:16:07,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:16:07,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:16:07,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:16:07,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:16:11,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:16:12,530 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:16:12,530 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 178 [2020-10-28 15:16:12,530 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 15:16:12,530 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5180 [2020-10-28 15:16:12,530 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:16:12,530 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:16:12,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 15:16:12,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 15:16:12,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 79 [2020-10-28 15:16:12,531 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:16:12,762 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:16:12,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:16:12,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:16:12,769 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:16:12,769 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:16:12,769 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:16:12,769 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 15:16:12,770 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:16:12,770 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:16:12,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:16:12,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:16:12,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:16:12,770 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:16:12,830 INFO L134 CoverageAnalysis]: Checked inductivity of 4170 backedges. 2124 proven. 910 refuted. 0 times theorem prover too weak. 1136 trivial. 0 not checked. [2020-10-28 15:16:12,830 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1938574460] [2020-10-28 15:16:12,831 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:16:12,831 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 15:16:12,831 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528281695] [2020-10-28 15:16:12,831 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 15:16:12,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:16:12,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 15:16:12,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-28 15:16:12,832 INFO L87 Difference]: Start difference. First operand 171 states and 187 transitions. Second operand 11 states. [2020-10-28 15:16:13,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:16:13,213 INFO L93 Difference]: Finished difference Result 299 states and 329 transitions. [2020-10-28 15:16:13,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 15:16:13,214 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 170 [2020-10-28 15:16:13,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:16:13,215 INFO L225 Difference]: With dead ends: 299 [2020-10-28 15:16:13,215 INFO L226 Difference]: Without dead ends: 213 [2020-10-28 15:16:13,216 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2020-10-28 15:16:13,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2020-10-28 15:16:13,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 193. [2020-10-28 15:16:13,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2020-10-28 15:16:13,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 211 transitions. [2020-10-28 15:16:13,247 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 211 transitions. Word has length 170 [2020-10-28 15:16:13,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:16:13,248 INFO L481 AbstractCegarLoop]: Abstraction has 193 states and 211 transitions. [2020-10-28 15:16:13,248 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 15:16:13,248 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 211 transitions. [2020-10-28 15:16:13,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2020-10-28 15:16:13,250 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:16:13,251 INFO L422 BasicCegarLoop]: trace histogram [64, 64, 16, 16, 16, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:16:13,251 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-28 15:16:13,251 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:16:13,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:16:13,252 INFO L82 PathProgramCache]: Analyzing trace with hash -1134777159, now seen corresponding path program 10 times [2020-10-28 15:16:13,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:16:13,252 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1944799748] [2020-10-28 15:16:13,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:16:13,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:16:13,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:16:13,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:16:13,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:16:13,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:16:13,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:16:14,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:16:14,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:16:14,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:16:18,618 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:16:18,619 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 200 [2020-10-28 15:16:18,619 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 15:16:18,619 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5244 [2020-10-28 15:16:18,619 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:16:18,619 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:16:18,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 15:16:18,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 35 [2020-10-28 15:16:18,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-28 15:16:18,620 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:16:18,781 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:16:18,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:16:18,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:16:18,787 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:16:18,787 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:16:18,787 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:16:18,788 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 15:16:18,788 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:16:18,788 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:16:18,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:16:18,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:16:18,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:16:18,788 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:16:18,821 INFO L134 CoverageAnalysis]: Checked inductivity of 5453 backedges. 1756 proven. 16 refuted. 0 times theorem prover too weak. 3681 trivial. 0 not checked. [2020-10-28 15:16:18,822 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1944799748] [2020-10-28 15:16:18,822 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:16:18,822 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 15:16:18,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294297456] [2020-10-28 15:16:18,823 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 15:16:18,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:16:18,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 15:16:18,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-28 15:16:18,824 INFO L87 Difference]: Start difference. First operand 193 states and 211 transitions. Second operand 8 states. [2020-10-28 15:16:19,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:16:19,057 INFO L93 Difference]: Finished difference Result 417 states and 468 transitions. [2020-10-28 15:16:19,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 15:16:19,058 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 192 [2020-10-28 15:16:19,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:16:19,060 INFO L225 Difference]: With dead ends: 417 [2020-10-28 15:16:19,060 INFO L226 Difference]: Without dead ends: 241 [2020-10-28 15:16:19,061 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-10-28 15:16:19,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2020-10-28 15:16:19,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 225. [2020-10-28 15:16:19,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 225 states. [2020-10-28 15:16:19,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 243 transitions. [2020-10-28 15:16:19,096 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 243 transitions. Word has length 192 [2020-10-28 15:16:19,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:16:19,096 INFO L481 AbstractCegarLoop]: Abstraction has 225 states and 243 transitions. [2020-10-28 15:16:19,096 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 15:16:19,096 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 243 transitions. [2020-10-28 15:16:19,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2020-10-28 15:16:19,099 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:16:19,099 INFO L422 BasicCegarLoop]: trace histogram [80, 80, 16, 16, 16, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:16:19,099 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-28 15:16:19,100 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:16:19,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:16:19,100 INFO L82 PathProgramCache]: Analyzing trace with hash 1524715705, now seen corresponding path program 11 times [2020-10-28 15:16:19,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:16:19,101 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [684708544] [2020-10-28 15:16:19,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:16:19,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:16:19,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:16:19,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:16:19,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:16:19,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:16:20,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:16:20,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:16:20,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:16:25,362 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:16:25,362 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 232 [2020-10-28 15:16:25,362 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 15:16:25,362 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6105 [2020-10-28 15:16:25,362 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:16:25,362 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:16:25,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 15:16:25,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 78 [2020-10-28 15:16:25,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-28 15:16:25,363 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:16:25,580 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:16:25,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:16:25,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:16:25,587 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:16:25,587 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:16:25,587 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:16:25,587 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:16:25,587 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:16:25,587 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:16:25,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:16:25,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:16:25,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:16:25,588 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:16:25,632 INFO L134 CoverageAnalysis]: Checked inductivity of 7997 backedges. 4094 proven. 25 refuted. 0 times theorem prover too weak. 3878 trivial. 0 not checked. [2020-10-28 15:16:25,633 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [684708544] [2020-10-28 15:16:25,633 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:16:25,633 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-28 15:16:25,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588710175] [2020-10-28 15:16:25,634 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 15:16:25,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:16:25,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 15:16:25,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-10-28 15:16:25,638 INFO L87 Difference]: Start difference. First operand 225 states and 243 transitions. Second operand 9 states. [2020-10-28 15:16:25,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:16:25,856 INFO L93 Difference]: Finished difference Result 479 states and 530 transitions. [2020-10-28 15:16:25,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 15:16:25,856 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 224 [2020-10-28 15:16:25,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:16:25,858 INFO L225 Difference]: With dead ends: 479 [2020-10-28 15:16:25,858 INFO L226 Difference]: Without dead ends: 273 [2020-10-28 15:16:25,859 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-10-28 15:16:25,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2020-10-28 15:16:25,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 257. [2020-10-28 15:16:25,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 257 states. [2020-10-28 15:16:25,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 275 transitions. [2020-10-28 15:16:25,894 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 275 transitions. Word has length 224 [2020-10-28 15:16:25,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:16:25,894 INFO L481 AbstractCegarLoop]: Abstraction has 257 states and 275 transitions. [2020-10-28 15:16:25,894 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 15:16:25,894 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 275 transitions. [2020-10-28 15:16:25,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2020-10-28 15:16:25,898 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:16:25,898 INFO L422 BasicCegarLoop]: trace histogram [96, 96, 16, 16, 16, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:16:25,898 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-28 15:16:25,898 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:16:25,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:16:25,899 INFO L82 PathProgramCache]: Analyzing trace with hash -178817863, now seen corresponding path program 12 times [2020-10-28 15:16:25,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:16:25,899 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [375296158] [2020-10-28 15:16:25,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:16:26,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:16:26,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:16:26,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:16:26,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:16:26,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:16:26,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:16:27,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:16:27,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:16:31,571 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:16:31,571 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 264 [2020-10-28 15:16:31,571 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 15:16:31,571 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5494 [2020-10-28 15:16:31,571 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:16:31,571 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:16:31,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 15:16:31,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-28 15:16:31,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-28 15:16:31,572 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:16:31,774 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:16:31,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:16:31,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:16:31,785 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:16:31,785 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:16:31,785 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:16:31,786 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 15:16:31,786 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:16:31,786 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:16:31,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:16:31,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:16:31,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:16:31,786 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:16:31,830 INFO L134 CoverageAnalysis]: Checked inductivity of 11053 backedges. 3560 proven. 36 refuted. 0 times theorem prover too weak. 7457 trivial. 0 not checked. [2020-10-28 15:16:31,830 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [375296158] [2020-10-28 15:16:31,830 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:16:31,831 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 15:16:31,831 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973950998] [2020-10-28 15:16:31,831 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 15:16:31,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:16:31,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 15:16:31,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-28 15:16:31,832 INFO L87 Difference]: Start difference. First operand 257 states and 275 transitions. Second operand 10 states. [2020-10-28 15:16:32,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:16:32,097 INFO L93 Difference]: Finished difference Result 541 states and 592 transitions. [2020-10-28 15:16:32,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 15:16:32,098 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 256 [2020-10-28 15:16:32,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:16:32,100 INFO L225 Difference]: With dead ends: 541 [2020-10-28 15:16:32,100 INFO L226 Difference]: Without dead ends: 305 [2020-10-28 15:16:32,101 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-10-28 15:16:32,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2020-10-28 15:16:32,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 289. [2020-10-28 15:16:32,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 289 states. [2020-10-28 15:16:32,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 307 transitions. [2020-10-28 15:16:32,145 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 307 transitions. Word has length 256 [2020-10-28 15:16:32,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:16:32,145 INFO L481 AbstractCegarLoop]: Abstraction has 289 states and 307 transitions. [2020-10-28 15:16:32,145 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 15:16:32,145 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 307 transitions. [2020-10-28 15:16:32,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 289 [2020-10-28 15:16:32,150 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:16:32,150 INFO L422 BasicCegarLoop]: trace histogram [112, 112, 16, 16, 16, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:16:32,150 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-28 15:16:32,150 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:16:32,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:16:32,151 INFO L82 PathProgramCache]: Analyzing trace with hash 1758927033, now seen corresponding path program 13 times [2020-10-28 15:16:32,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:16:32,151 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [882946447] [2020-10-28 15:16:32,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:16:32,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:16:32,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:16:33,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:16:33,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:16:33,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:16:33,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:16:33,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:16:33,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:16:38,468 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:16:38,468 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 296 [2020-10-28 15:16:38,468 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 15:16:38,468 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6065 [2020-10-28 15:16:38,468 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:16:38,468 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:16:38,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 15:16:38,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 115 [2020-10-28 15:16:38,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 15:16:38,469 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:16:38,695 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:16:38,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:16:38,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:16:38,703 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:16:38,703 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:16:38,703 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:16:38,704 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 15:16:38,704 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:16:38,704 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:16:38,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:16:38,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:16:38,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:16:38,704 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:16:38,759 INFO L134 CoverageAnalysis]: Checked inductivity of 14621 backedges. 7936 proven. 49 refuted. 0 times theorem prover too weak. 6636 trivial. 0 not checked. [2020-10-28 15:16:38,759 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [882946447] [2020-10-28 15:16:38,759 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:16:38,759 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 15:16:38,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573890535] [2020-10-28 15:16:38,760 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 15:16:38,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:16:38,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 15:16:38,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-28 15:16:38,761 INFO L87 Difference]: Start difference. First operand 289 states and 307 transitions. Second operand 11 states. [2020-10-28 15:16:39,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:16:39,070 INFO L93 Difference]: Finished difference Result 603 states and 654 transitions. [2020-10-28 15:16:39,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 15:16:39,071 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 288 [2020-10-28 15:16:39,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:16:39,074 INFO L225 Difference]: With dead ends: 603 [2020-10-28 15:16:39,074 INFO L226 Difference]: Without dead ends: 337 [2020-10-28 15:16:39,075 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2020-10-28 15:16:39,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2020-10-28 15:16:39,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 321. [2020-10-28 15:16:39,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 321 states. [2020-10-28 15:16:39,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 339 transitions. [2020-10-28 15:16:39,126 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 339 transitions. Word has length 288 [2020-10-28 15:16:39,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:16:39,126 INFO L481 AbstractCegarLoop]: Abstraction has 321 states and 339 transitions. [2020-10-28 15:16:39,126 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 15:16:39,127 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 339 transitions. [2020-10-28 15:16:39,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 321 [2020-10-28 15:16:39,129 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:16:39,129 INFO L422 BasicCegarLoop]: trace histogram [128, 128, 16, 16, 16, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:16:39,129 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-28 15:16:39,129 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:16:39,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:16:39,130 INFO L82 PathProgramCache]: Analyzing trace with hash -92783431, now seen corresponding path program 14 times [2020-10-28 15:16:39,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:16:39,130 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1561790170] [2020-10-28 15:16:39,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:16:39,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:16:39,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:16:39,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:16:40,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:16:40,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:16:40,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:16:40,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:16:41,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:16:45,296 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:16:45,296 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 328 [2020-10-28 15:16:45,296 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 15:16:45,296 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5940 [2020-10-28 15:16:45,297 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:16:45,297 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:16:45,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 15:16:45,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 108 [2020-10-28 15:16:45,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-28 15:16:45,297 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:16:45,552 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:16:45,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:16:45,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:16:45,560 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:16:45,560 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:16:45,561 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:16:45,561 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:16:45,561 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:16:45,561 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:16:45,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:16:45,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:16:45,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:16:45,562 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:16:45,623 INFO L134 CoverageAnalysis]: Checked inductivity of 18701 backedges. 9554 proven. 64 refuted. 0 times theorem prover too weak. 9083 trivial. 0 not checked. [2020-10-28 15:16:45,624 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1561790170] [2020-10-28 15:16:45,624 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:16:45,624 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 15:16:45,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989036152] [2020-10-28 15:16:45,625 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 15:16:45,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:16:45,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 15:16:45,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-10-28 15:16:45,626 INFO L87 Difference]: Start difference. First operand 321 states and 339 transitions. Second operand 12 states. [2020-10-28 15:16:45,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:16:45,976 INFO L93 Difference]: Finished difference Result 665 states and 716 transitions. [2020-10-28 15:16:45,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 15:16:45,977 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 320 [2020-10-28 15:16:45,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:16:45,979 INFO L225 Difference]: With dead ends: 665 [2020-10-28 15:16:45,979 INFO L226 Difference]: Without dead ends: 369 [2020-10-28 15:16:45,980 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2020-10-28 15:16:45,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2020-10-28 15:16:46,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 353. [2020-10-28 15:16:46,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 353 states. [2020-10-28 15:16:46,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 371 transitions. [2020-10-28 15:16:46,019 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 371 transitions. Word has length 320 [2020-10-28 15:16:46,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:16:46,019 INFO L481 AbstractCegarLoop]: Abstraction has 353 states and 371 transitions. [2020-10-28 15:16:46,019 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 15:16:46,019 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 371 transitions. [2020-10-28 15:16:46,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 353 [2020-10-28 15:16:46,022 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:16:46,022 INFO L422 BasicCegarLoop]: trace histogram [144, 144, 16, 16, 16, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:16:46,022 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-28 15:16:46,022 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:16:46,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:16:46,023 INFO L82 PathProgramCache]: Analyzing trace with hash -682434375, now seen corresponding path program 15 times [2020-10-28 15:16:46,023 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:16:46,023 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [782286064] [2020-10-28 15:16:46,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:16:46,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:16:46,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:16:46,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:16:47,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:16:47,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:16:47,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:16:48,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:16:48,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:16:53,026 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:16:53,026 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 360 [2020-10-28 15:16:53,026 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 15:16:53,026 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6755 [2020-10-28 15:16:53,026 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:16:53,026 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:16:53,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 15:16:53,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 55 [2020-10-28 15:16:53,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-28 15:16:53,027 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:16:53,397 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:16:53,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:16:53,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:16:53,406 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:16:53,406 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:16:53,407 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:16:53,407 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 15:16:53,407 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:16:53,407 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:16:53,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:16:53,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:16:53,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:16:53,408 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:16:53,572 INFO L134 CoverageAnalysis]: Checked inductivity of 23293 backedges. 7496 proven. 81 refuted. 0 times theorem prover too weak. 15716 trivial. 0 not checked. [2020-10-28 15:16:53,572 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [782286064] [2020-10-28 15:16:53,573 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:16:53,573 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 15:16:53,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331999367] [2020-10-28 15:16:53,577 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 15:16:53,577 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:16:53,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 15:16:53,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-10-28 15:16:53,579 INFO L87 Difference]: Start difference. First operand 353 states and 371 transitions. Second operand 13 states. [2020-10-28 15:16:53,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:16:53,984 INFO L93 Difference]: Finished difference Result 727 states and 778 transitions. [2020-10-28 15:16:53,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 15:16:53,985 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 352 [2020-10-28 15:16:53,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:16:53,988 INFO L225 Difference]: With dead ends: 727 [2020-10-28 15:16:53,988 INFO L226 Difference]: Without dead ends: 401 [2020-10-28 15:16:53,990 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2020-10-28 15:16:53,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2020-10-28 15:16:54,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 385. [2020-10-28 15:16:54,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 385 states. [2020-10-28 15:16:54,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 403 transitions. [2020-10-28 15:16:54,031 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 403 transitions. Word has length 352 [2020-10-28 15:16:54,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:16:54,032 INFO L481 AbstractCegarLoop]: Abstraction has 385 states and 403 transitions. [2020-10-28 15:16:54,032 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 15:16:54,032 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 403 transitions. [2020-10-28 15:16:54,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 385 [2020-10-28 15:16:54,034 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:16:54,035 INFO L422 BasicCegarLoop]: trace histogram [160, 160, 16, 16, 16, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:16:54,035 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-28 15:16:54,035 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:16:54,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:16:54,035 INFO L82 PathProgramCache]: Analyzing trace with hash -1803615047, now seen corresponding path program 16 times [2020-10-28 15:16:54,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:16:54,036 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1235557635] [2020-10-28 15:16:54,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:16:54,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:16:54,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:16:55,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:16:55,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:16:55,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:16:56,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:16:56,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:16:56,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:17:01,637 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:17:01,637 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 392 [2020-10-28 15:17:01,638 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 15:17:01,638 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7237 [2020-10-28 15:17:01,638 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:17:01,638 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:17:01,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 15:17:01,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 82 [2020-10-28 15:17:01,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-28 15:17:01,638 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:17:01,987 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:17:01,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:17:01,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:17:01,994 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:17:01,994 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:17:01,994 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:17:01,994 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:17:01,994 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:17:01,994 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:17:01,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:17:01,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:17:01,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:17:01,995 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:17:02,107 INFO L134 CoverageAnalysis]: Checked inductivity of 28397 backedges. 11368 proven. 100 refuted. 0 times theorem prover too weak. 16929 trivial. 0 not checked. [2020-10-28 15:17:02,107 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1235557635] [2020-10-28 15:17:02,107 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:17:02,107 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 15:17:02,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68325993] [2020-10-28 15:17:02,108 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 15:17:02,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:17:02,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 15:17:02,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2020-10-28 15:17:02,114 INFO L87 Difference]: Start difference. First operand 385 states and 403 transitions. Second operand 14 states. [2020-10-28 15:17:02,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:17:02,523 INFO L93 Difference]: Finished difference Result 789 states and 840 transitions. [2020-10-28 15:17:02,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-28 15:17:02,524 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 384 [2020-10-28 15:17:02,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:17:02,526 INFO L225 Difference]: With dead ends: 789 [2020-10-28 15:17:02,526 INFO L226 Difference]: Without dead ends: 433 [2020-10-28 15:17:02,527 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2020-10-28 15:17:02,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433 states. [2020-10-28 15:17:02,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433 to 417. [2020-10-28 15:17:02,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 417 states. [2020-10-28 15:17:02,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417 states to 417 states and 435 transitions. [2020-10-28 15:17:02,577 INFO L78 Accepts]: Start accepts. Automaton has 417 states and 435 transitions. Word has length 384 [2020-10-28 15:17:02,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:17:02,577 INFO L481 AbstractCegarLoop]: Abstraction has 417 states and 435 transitions. [2020-10-28 15:17:02,578 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 15:17:02,578 INFO L276 IsEmpty]: Start isEmpty. Operand 417 states and 435 transitions. [2020-10-28 15:17:02,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 417 [2020-10-28 15:17:02,580 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:17:02,581 INFO L422 BasicCegarLoop]: trace histogram [176, 176, 16, 16, 16, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:17:02,581 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-28 15:17:02,581 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:17:02,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:17:02,582 INFO L82 PathProgramCache]: Analyzing trace with hash -1357600583, now seen corresponding path program 17 times [2020-10-28 15:17:02,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:17:02,582 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [712212116] [2020-10-28 15:17:02,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:17:02,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:17:03,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:17:03,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:17:04,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:17:04,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:17:05,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:17:05,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:17:05,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:17:05,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:17:11,501 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:17:11,502 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 424 [2020-10-28 15:17:11,502 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 15:17:11,502 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8535 [2020-10-28 15:17:11,502 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:17:11,502 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:17:11,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-28 15:17:11,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 38 [2020-10-28 15:17:11,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-28 15:17:11,503 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:17:11,910 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:17:11,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:17:11,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:17:11,918 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:17:11,919 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:17:11,919 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:17:11,919 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 15:17:11,919 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:17:11,920 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:17:11,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:17:11,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:17:11,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:17:11,921 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:17:12,130 INFO L134 CoverageAnalysis]: Checked inductivity of 34013 backedges. 7734 proven. 121 refuted. 0 times theorem prover too weak. 26158 trivial. 0 not checked. [2020-10-28 15:17:12,138 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [712212116] [2020-10-28 15:17:12,138 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:17:12,139 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-28 15:17:12,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427386919] [2020-10-28 15:17:12,140 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-28 15:17:12,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:17:12,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-28 15:17:12,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2020-10-28 15:17:12,141 INFO L87 Difference]: Start difference. First operand 417 states and 435 transitions. Second operand 15 states. [2020-10-28 15:17:12,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:17:12,631 INFO L93 Difference]: Finished difference Result 851 states and 902 transitions. [2020-10-28 15:17:12,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-28 15:17:12,633 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 416 [2020-10-28 15:17:12,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:17:12,636 INFO L225 Difference]: With dead ends: 851 [2020-10-28 15:17:12,636 INFO L226 Difference]: Without dead ends: 465 [2020-10-28 15:17:12,637 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2020-10-28 15:17:12,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2020-10-28 15:17:12,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 449. [2020-10-28 15:17:12,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 449 states. [2020-10-28 15:17:12,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 449 states to 449 states and 467 transitions. [2020-10-28 15:17:12,693 INFO L78 Accepts]: Start accepts. Automaton has 449 states and 467 transitions. Word has length 416 [2020-10-28 15:17:12,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:17:12,693 INFO L481 AbstractCegarLoop]: Abstraction has 449 states and 467 transitions. [2020-10-28 15:17:12,693 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-28 15:17:12,693 INFO L276 IsEmpty]: Start isEmpty. Operand 449 states and 467 transitions. [2020-10-28 15:17:12,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 449 [2020-10-28 15:17:12,697 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:17:12,697 INFO L422 BasicCegarLoop]: trace histogram [192, 192, 16, 16, 16, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:17:12,697 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-28 15:17:12,698 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:17:12,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:17:12,698 INFO L82 PathProgramCache]: Analyzing trace with hash 204197049, now seen corresponding path program 18 times [2020-10-28 15:17:12,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:17:12,698 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1436857221] [2020-10-28 15:17:12,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:17:13,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:17:13,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:17:14,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:17:14,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:17:14,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:17:15,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:17:15,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:17:16,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:17:28,137 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:17:28,137 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 456 [2020-10-28 15:17:28,137 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 15:17:28,137 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15064 [2020-10-28 15:17:28,137 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:17:28,137 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:17:28,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 15:17:28,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 67 [2020-10-28 15:17:28,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-28 15:17:28,138 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:17:28,566 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:17:28,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:17:28,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:17:28,573 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:17:28,573 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:17:28,573 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:17:28,573 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 15:17:28,574 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:17:28,574 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:17:28,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:17:28,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:17:28,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:17:28,574 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:17:28,693 INFO L134 CoverageAnalysis]: Checked inductivity of 40141 backedges. 12908 proven. 144 refuted. 0 times theorem prover too weak. 27089 trivial. 0 not checked. [2020-10-28 15:17:28,694 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1436857221] [2020-10-28 15:17:28,694 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:17:28,694 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-28 15:17:28,694 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787774784] [2020-10-28 15:17:28,695 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-28 15:17:28,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:17:28,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-28 15:17:28,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2020-10-28 15:17:28,696 INFO L87 Difference]: Start difference. First operand 449 states and 467 transitions. Second operand 16 states. [2020-10-28 15:17:29,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:17:29,288 INFO L93 Difference]: Finished difference Result 913 states and 964 transitions. [2020-10-28 15:17:29,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-28 15:17:29,289 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 448 [2020-10-28 15:17:29,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:17:29,292 INFO L225 Difference]: With dead ends: 913 [2020-10-28 15:17:29,292 INFO L226 Difference]: Without dead ends: 497 [2020-10-28 15:17:29,293 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2020-10-28 15:17:29,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 497 states. [2020-10-28 15:17:29,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 497 to 481. [2020-10-28 15:17:29,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 481 states. [2020-10-28 15:17:29,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 481 states to 481 states and 499 transitions. [2020-10-28 15:17:29,353 INFO L78 Accepts]: Start accepts. Automaton has 481 states and 499 transitions. Word has length 448 [2020-10-28 15:17:29,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:17:29,354 INFO L481 AbstractCegarLoop]: Abstraction has 481 states and 499 transitions. [2020-10-28 15:17:29,354 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-28 15:17:29,354 INFO L276 IsEmpty]: Start isEmpty. Operand 481 states and 499 transitions. [2020-10-28 15:17:29,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 481 [2020-10-28 15:17:29,358 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:17:29,358 INFO L422 BasicCegarLoop]: trace histogram [208, 208, 16, 16, 16, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:17:29,360 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-28 15:17:29,360 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:17:29,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:17:29,361 INFO L82 PathProgramCache]: Analyzing trace with hash 2027712697, now seen corresponding path program 19 times [2020-10-28 15:17:29,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:17:29,361 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [915681090] [2020-10-28 15:17:29,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:17:29,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:17:30,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:17:30,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:17:31,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:17:32,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:17:32,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:17:32,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:17:33,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:17:42,339 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:17:42,339 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 488 [2020-10-28 15:17:42,339 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 15:17:42,339 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12578 [2020-10-28 15:17:42,339 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:17:42,339 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:17:42,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-28 15:17:42,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 158 [2020-10-28 15:17:42,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-28 15:17:42,340 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:17:42,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:17:42,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:17:42,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:17:42,823 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:17:42,823 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:17:42,823 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:17:42,824 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:17:42,824 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:17:42,824 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:17:42,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:17:42,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:17:42,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:17:42,824 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:17:42,959 INFO L134 CoverageAnalysis]: Checked inductivity of 46781 backedges. 23854 proven. 169 refuted. 0 times theorem prover too weak. 22758 trivial. 0 not checked. [2020-10-28 15:17:42,960 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [915681090] [2020-10-28 15:17:42,960 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:17:42,960 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-28 15:17:42,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143169943] [2020-10-28 15:17:42,961 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-28 15:17:42,961 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:17:42,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-28 15:17:42,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2020-10-28 15:17:42,962 INFO L87 Difference]: Start difference. First operand 481 states and 499 transitions. Second operand 17 states. [2020-10-28 15:17:43,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:17:43,643 INFO L93 Difference]: Finished difference Result 975 states and 1026 transitions. [2020-10-28 15:17:43,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-28 15:17:43,643 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 480 [2020-10-28 15:17:43,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:17:43,646 INFO L225 Difference]: With dead ends: 975 [2020-10-28 15:17:43,646 INFO L226 Difference]: Without dead ends: 529 [2020-10-28 15:17:43,648 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2020-10-28 15:17:43,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 529 states. [2020-10-28 15:17:43,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 529 to 513. [2020-10-28 15:17:43,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 513 states. [2020-10-28 15:17:43,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 513 states to 513 states and 531 transitions. [2020-10-28 15:17:43,715 INFO L78 Accepts]: Start accepts. Automaton has 513 states and 531 transitions. Word has length 480 [2020-10-28 15:17:43,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:17:43,715 INFO L481 AbstractCegarLoop]: Abstraction has 513 states and 531 transitions. [2020-10-28 15:17:43,716 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-28 15:17:43,716 INFO L276 IsEmpty]: Start isEmpty. Operand 513 states and 531 transitions. [2020-10-28 15:17:43,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 513 [2020-10-28 15:17:43,720 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:17:43,720 INFO L422 BasicCegarLoop]: trace histogram [224, 224, 16, 16, 16, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:17:43,721 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-28 15:17:43,721 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:17:43,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:17:43,721 INFO L82 PathProgramCache]: Analyzing trace with hash 708744377, now seen corresponding path program 20 times [2020-10-28 15:17:43,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:17:43,722 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1961620010] [2020-10-28 15:17:43,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:17:44,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:17:44,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:17:45,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:17:46,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:17:47,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:17:47,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:17:47,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:17:48,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:18:05,680 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:18:05,681 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 520 [2020-10-28 15:18:05,681 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 15:18:05,681 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21213 [2020-10-28 15:18:05,681 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:18:05,681 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:18:05,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-28 15:18:05,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 44 [2020-10-28 15:18:05,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-28 15:18:05,681 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:18:06,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:18:06,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:18:06,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:18:06,174 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:18:06,175 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:18:06,175 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:18:06,175 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 15:18:06,175 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:18:06,175 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:18:06,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:18:06,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:18:06,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:18:06,175 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:18:06,369 INFO L134 CoverageAnalysis]: Checked inductivity of 53933 backedges. 12258 proven. 196 refuted. 0 times theorem prover too weak. 41479 trivial. 0 not checked. [2020-10-28 15:18:06,369 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1961620010] [2020-10-28 15:18:06,369 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:18:06,370 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-28 15:18:06,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597548937] [2020-10-28 15:18:06,370 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-28 15:18:06,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:18:06,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-28 15:18:06,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2020-10-28 15:18:06,371 INFO L87 Difference]: Start difference. First operand 513 states and 531 transitions. Second operand 18 states. [2020-10-28 15:18:07,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:18:07,085 INFO L93 Difference]: Finished difference Result 1037 states and 1088 transitions. [2020-10-28 15:18:07,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-28 15:18:07,086 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 512 [2020-10-28 15:18:07,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:18:07,089 INFO L225 Difference]: With dead ends: 1037 [2020-10-28 15:18:07,089 INFO L226 Difference]: Without dead ends: 561 [2020-10-28 15:18:07,091 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2020-10-28 15:18:07,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 561 states. [2020-10-28 15:18:07,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 561 to 545. [2020-10-28 15:18:07,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 545 states. [2020-10-28 15:18:07,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 545 states to 545 states and 563 transitions. [2020-10-28 15:18:07,156 INFO L78 Accepts]: Start accepts. Automaton has 545 states and 563 transitions. Word has length 512 [2020-10-28 15:18:07,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:18:07,156 INFO L481 AbstractCegarLoop]: Abstraction has 545 states and 563 transitions. [2020-10-28 15:18:07,156 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-28 15:18:07,156 INFO L276 IsEmpty]: Start isEmpty. Operand 545 states and 563 transitions. [2020-10-28 15:18:07,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 545 [2020-10-28 15:18:07,161 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:18:07,162 INFO L422 BasicCegarLoop]: trace histogram [240, 240, 16, 16, 16, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:18:07,162 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-28 15:18:07,162 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:18:07,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:18:07,163 INFO L82 PathProgramCache]: Analyzing trace with hash 1030371513, now seen corresponding path program 21 times [2020-10-28 15:18:07,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:18:07,163 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [940919246] [2020-10-28 15:18:07,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:18:07,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:18:08,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:18:09,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:18:09,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:18:10,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:18:11,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:18:11,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:18:11,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:18:35,318 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:18:35,318 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 552 [2020-10-28 15:18:35,318 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 15:18:35,319 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27603 [2020-10-28 15:18:35,319 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:18:35,319 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:18:35,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-28 15:18:35,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 178 [2020-10-28 15:18:35,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-28 15:18:35,319 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:18:35,913 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:18:35,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:18:35,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:18:35,918 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:18:35,918 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:18:35,919 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:18:35,919 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:18:35,919 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:18:35,919 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:18:35,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:18:35,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:18:35,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:18:35,919 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:18:36,049 INFO L134 CoverageAnalysis]: Checked inductivity of 61597 backedges. 31394 proven. 225 refuted. 0 times theorem prover too weak. 29978 trivial. 0 not checked. [2020-10-28 15:18:36,049 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [940919246] [2020-10-28 15:18:36,050 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:18:36,050 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-28 15:18:36,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306971362] [2020-10-28 15:18:36,050 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-28 15:18:36,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:18:36,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-28 15:18:36,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2020-10-28 15:18:36,051 INFO L87 Difference]: Start difference. First operand 545 states and 563 transitions. Second operand 19 states. [2020-10-28 15:18:36,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:18:36,794 INFO L93 Difference]: Finished difference Result 1099 states and 1150 transitions. [2020-10-28 15:18:36,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-28 15:18:36,795 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 544 [2020-10-28 15:18:36,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:18:36,798 INFO L225 Difference]: With dead ends: 1099 [2020-10-28 15:18:36,798 INFO L226 Difference]: Without dead ends: 593 [2020-10-28 15:18:36,800 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2020-10-28 15:18:36,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 593 states. [2020-10-28 15:18:36,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 593 to 577. [2020-10-28 15:18:36,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 577 states. [2020-10-28 15:18:36,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 577 states to 577 states and 595 transitions. [2020-10-28 15:18:36,871 INFO L78 Accepts]: Start accepts. Automaton has 577 states and 595 transitions. Word has length 544 [2020-10-28 15:18:36,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:18:36,871 INFO L481 AbstractCegarLoop]: Abstraction has 577 states and 595 transitions. [2020-10-28 15:18:36,871 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-28 15:18:36,871 INFO L276 IsEmpty]: Start isEmpty. Operand 577 states and 595 transitions. [2020-10-28 15:18:36,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 577 [2020-10-28 15:18:36,876 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:18:36,877 INFO L422 BasicCegarLoop]: trace histogram [256, 256, 16, 16, 16, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:18:36,877 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-28 15:18:36,877 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:18:36,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:18:36,878 INFO L82 PathProgramCache]: Analyzing trace with hash 930569401, now seen corresponding path program 22 times [2020-10-28 15:18:36,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:18:36,878 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [931446100] [2020-10-28 15:18:36,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:18:37,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:18:38,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:18:39,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:18:40,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:18:40,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:18:41,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:18:41,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:18:42,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:18:42,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:18:42,822 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:18:42,822 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 584 [2020-10-28 15:18:42,822 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 15:18:42,823 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5091 [2020-10-28 15:18:42,823 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:18:42,823 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:18:42,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-28 15:18:42,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 188 [2020-10-28 15:18:42,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-28 15:18:42,823 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:18:43,432 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:18:43,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:18:43,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:18:43,439 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:18:43,439 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:18:43,440 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:18:43,440 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 15:18:43,440 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:18:43,440 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:18:43,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:18:43,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:18:43,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:18:43,441 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:18:43,623 INFO L134 CoverageAnalysis]: Checked inductivity of 69773 backedges. 35554 proven. 256 refuted. 0 times theorem prover too weak. 33963 trivial. 0 not checked. [2020-10-28 15:18:43,623 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [931446100] [2020-10-28 15:18:43,623 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:18:43,623 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-28 15:18:43,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961495239] [2020-10-28 15:18:43,624 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-28 15:18:43,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:18:43,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-28 15:18:43,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2020-10-28 15:18:43,625 INFO L87 Difference]: Start difference. First operand 577 states and 595 transitions. Second operand 20 states. [2020-10-28 15:18:44,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:18:44,382 INFO L93 Difference]: Finished difference Result 1161 states and 1212 transitions. [2020-10-28 15:18:44,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-28 15:18:44,382 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 576 [2020-10-28 15:18:44,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:18:44,386 INFO L225 Difference]: With dead ends: 1161 [2020-10-28 15:18:44,386 INFO L226 Difference]: Without dead ends: 625 [2020-10-28 15:18:44,388 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2020-10-28 15:18:44,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 625 states. [2020-10-28 15:18:44,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 625 to 609. [2020-10-28 15:18:44,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 609 states. [2020-10-28 15:18:44,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 609 states to 609 states and 627 transitions. [2020-10-28 15:18:44,458 INFO L78 Accepts]: Start accepts. Automaton has 609 states and 627 transitions. Word has length 576 [2020-10-28 15:18:44,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:18:44,459 INFO L481 AbstractCegarLoop]: Abstraction has 609 states and 627 transitions. [2020-10-28 15:18:44,459 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-28 15:18:44,459 INFO L276 IsEmpty]: Start isEmpty. Operand 609 states and 627 transitions. [2020-10-28 15:18:44,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 609 [2020-10-28 15:18:44,464 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:18:44,466 INFO L422 BasicCegarLoop]: trace histogram [272, 272, 16, 16, 16, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:18:44,466 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-28 15:18:44,466 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:18:44,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:18:44,467 INFO L82 PathProgramCache]: Analyzing trace with hash -2055339847, now seen corresponding path program 23 times [2020-10-28 15:18:44,467 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:18:44,467 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [691490166] [2020-10-28 15:18:44,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:18:45,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:18:45,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:18:46,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:18:47,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:18:48,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:18:49,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:18:49,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:18:50,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:18:50,514 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:18:50,514 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 616 [2020-10-28 15:18:50,514 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 15:18:50,514 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5264 [2020-10-28 15:18:50,514 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:18:50,514 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:18:50,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-28 15:18:50,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 50 [2020-10-28 15:18:50,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-28 15:18:50,515 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:18:51,105 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:18:51,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:18:51,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:18:51,110 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:18:51,111 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:18:51,111 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:18:51,111 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:18:51,111 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:18:51,111 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:18:51,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:18:51,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:18:51,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:18:51,111 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:18:51,264 INFO L134 CoverageAnalysis]: Checked inductivity of 78461 backedges. 17826 proven. 289 refuted. 0 times theorem prover too weak. 60346 trivial. 0 not checked. [2020-10-28 15:18:51,265 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [691490166] [2020-10-28 15:18:51,265 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:18:51,265 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-28 15:18:51,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169753147] [2020-10-28 15:18:51,265 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-28 15:18:51,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:18:51,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-28 15:18:51,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2020-10-28 15:18:51,266 INFO L87 Difference]: Start difference. First operand 609 states and 627 transitions. Second operand 21 states. [2020-10-28 15:18:52,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:18:52,132 INFO L93 Difference]: Finished difference Result 1223 states and 1274 transitions. [2020-10-28 15:18:52,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-28 15:18:52,132 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 608 [2020-10-28 15:18:52,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:18:52,136 INFO L225 Difference]: With dead ends: 1223 [2020-10-28 15:18:52,136 INFO L226 Difference]: Without dead ends: 657 [2020-10-28 15:18:52,138 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=61, Invalid=401, Unknown=0, NotChecked=0, Total=462 [2020-10-28 15:18:52,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 657 states. [2020-10-28 15:18:52,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 657 to 641. [2020-10-28 15:18:52,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 641 states. [2020-10-28 15:18:52,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 641 states to 641 states and 659 transitions. [2020-10-28 15:18:52,210 INFO L78 Accepts]: Start accepts. Automaton has 641 states and 659 transitions. Word has length 608 [2020-10-28 15:18:52,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:18:52,210 INFO L481 AbstractCegarLoop]: Abstraction has 641 states and 659 transitions. [2020-10-28 15:18:52,210 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-28 15:18:52,210 INFO L276 IsEmpty]: Start isEmpty. Operand 641 states and 659 transitions. [2020-10-28 15:18:52,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 641 [2020-10-28 15:18:52,216 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:18:52,216 INFO L422 BasicCegarLoop]: trace histogram [288, 288, 16, 16, 16, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:18:52,216 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-28 15:18:52,217 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:18:52,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:18:52,217 INFO L82 PathProgramCache]: Analyzing trace with hash -57269063, now seen corresponding path program 24 times [2020-10-28 15:18:52,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:18:52,218 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1246782298] [2020-10-28 15:18:52,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:18:52,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:18:53,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:18:55,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking...