/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/compact.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 15:05:28,164 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 15:05:28,169 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 15:05:28,229 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 15:05:28,230 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 15:05:28,236 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 15:05:28,238 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 15:05:28,243 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 15:05:28,247 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 15:05:28,253 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 15:05:28,254 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 15:05:28,256 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 15:05:28,256 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 15:05:28,259 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 15:05:28,261 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 15:05:28,263 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 15:05:28,264 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 15:05:28,268 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 15:05:28,275 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 15:05:28,284 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 15:05:28,286 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 15:05:28,288 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 15:05:28,289 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 15:05:28,292 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 15:05:28,301 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 15:05:28,301 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 15:05:28,301 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 15:05:28,304 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 15:05:28,304 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 15:05:28,305 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 15:05:28,306 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 15:05:28,307 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 15:05:28,309 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 15:05:28,310 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 15:05:28,311 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 15:05:28,311 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 15:05:28,312 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 15:05:28,312 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 15:05:28,313 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 15:05:28,314 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 15:05:28,314 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 15:05:28,322 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 15:05:28,379 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 15:05:28,380 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 15:05:28,383 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 15:05:28,384 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 15:05:28,384 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 15:05:28,384 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 15:05:28,384 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 15:05:28,384 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 15:05:28,385 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 15:05:28,385 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 15:05:28,386 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 15:05:28,386 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 15:05:28,386 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 15:05:28,387 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 15:05:28,387 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 15:05:28,387 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 15:05:28,387 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 15:05:28,387 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 15:05:28,388 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 15:05:28,388 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 15:05:28,388 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 15:05:28,388 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 15:05:28,388 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 15:05:28,389 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 15:05:28,389 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 15:05:28,389 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 15:05:28,389 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 15:05:28,389 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 15:05:28,389 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 15:05:28,390 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 15:05:28,809 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 15:05:28,839 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 15:05:28,844 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 15:05:28,845 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 15:05:28,846 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 15:05:28,847 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/compact.c [2020-10-28 15:05:28,927 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7939d6ebc/00892da8ed0d4d81996ba50d50c508be/FLAG3d3d186cc [2020-10-28 15:05:29,473 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 15:05:29,474 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/compact.c [2020-10-28 15:05:29,481 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7939d6ebc/00892da8ed0d4d81996ba50d50c508be/FLAG3d3d186cc [2020-10-28 15:05:29,846 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7939d6ebc/00892da8ed0d4d81996ba50d50c508be [2020-10-28 15:05:29,849 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 15:05:29,855 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 15:05:29,858 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 15:05:29,859 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 15:05:29,864 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 15:05:29,865 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 03:05:29" (1/1) ... [2020-10-28 15:05:29,868 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2d6f2885 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:05:29, skipping insertion in model container [2020-10-28 15:05:29,869 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 03:05:29" (1/1) ... [2020-10-28 15:05:29,878 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 15:05:29,896 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 15:05:30,056 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 15:05:30,067 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 15:05:30,085 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 15:05:30,102 INFO L208 MainTranslator]: Completed translation [2020-10-28 15:05:30,103 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:05:30 WrapperNode [2020-10-28 15:05:30,103 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 15:05:30,104 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 15:05:30,105 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 15:05:30,105 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 15:05:30,116 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:05:30" (1/1) ... [2020-10-28 15:05:30,116 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:05:30" (1/1) ... [2020-10-28 15:05:30,125 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:05:30" (1/1) ... [2020-10-28 15:05:30,125 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:05:30" (1/1) ... [2020-10-28 15:05:30,133 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:05:30" (1/1) ... [2020-10-28 15:05:30,138 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:05:30" (1/1) ... [2020-10-28 15:05:30,139 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:05:30" (1/1) ... [2020-10-28 15:05:30,142 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 15:05:30,143 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 15:05:30,143 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 15:05:30,143 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 15:05:30,144 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:05:30" (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 15:05:30,225 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 15:05:30,225 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 15:05:30,225 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 15:05:30,226 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 15:05:30,226 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 15:05:30,226 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 15:05:30,226 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 15:05:30,226 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 15:05:30,226 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-28 15:05:30,226 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 15:05:30,227 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 15:05:30,227 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 15:05:30,227 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 15:05:30,227 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 15:05:30,227 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 15:05:30,228 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 15:05:30,693 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 15:05:30,693 INFO L298 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-28 15:05:30,695 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 03:05:30 BoogieIcfgContainer [2020-10-28 15:05:30,695 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 15:05:30,697 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 15:05:30,698 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 15:05:30,701 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 15:05:30,702 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 03:05:29" (1/3) ... [2020-10-28 15:05:30,703 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25bdc25e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 03:05:30, skipping insertion in model container [2020-10-28 15:05:30,703 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:05:30" (2/3) ... [2020-10-28 15:05:30,703 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25bdc25e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 03:05:30, skipping insertion in model container [2020-10-28 15:05:30,704 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 03:05:30" (3/3) ... [2020-10-28 15:05:30,705 INFO L111 eAbstractionObserver]: Analyzing ICFG compact.c [2020-10-28 15:05:30,719 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 15:05:30,724 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 15:05:30,740 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 15:05:30,768 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 15:05:30,769 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 15:05:30,769 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 15:05:30,769 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 15:05:30,769 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 15:05:30,769 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 15:05:30,769 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 15:05:30,769 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 15:05:30,788 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2020-10-28 15:05:30,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-28 15:05:30,794 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:05:30,795 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:05:30,796 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:05:30,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:05:30,803 INFO L82 PathProgramCache]: Analyzing trace with hash 1845562233, now seen corresponding path program 1 times [2020-10-28 15:05:30,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:05:30,813 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1605569107] [2020-10-28 15:05:30,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:05:30,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:05:30,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:31,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:31,215 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:05:31,216 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-28 15:05:31,216 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:05:31,216 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 261 [2020-10-28 15:05:31,219 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:05:31,220 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:05:31,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:05:31,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 15:05:31,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:05:31,220 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-28 15:05:31,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:05:31,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:05:31,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:31,371 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:05:31,372 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:05:31,372 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:05:31,372 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-28 15:05:31,373 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:05:31,373 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:05:31,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:05:31,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:05:31,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:05:31,374 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:05:31,385 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 15:05:31,385 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1605569107] [2020-10-28 15:05:31,387 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 15:05:31,388 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-28 15:05:31,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756562057] [2020-10-28 15:05:31,393 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-28 15:05:31,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:05:31,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-28 15:05:31,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-28 15:05:31,411 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 3 states. [2020-10-28 15:05:31,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:05:31,516 INFO L93 Difference]: Finished difference Result 41 states and 54 transitions. [2020-10-28 15:05:31,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-28 15:05:31,518 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2020-10-28 15:05:31,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:05:31,527 INFO L225 Difference]: With dead ends: 41 [2020-10-28 15:05:31,527 INFO L226 Difference]: Without dead ends: 21 [2020-10-28 15:05:31,530 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-28 15:05:31,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-10-28 15:05:31,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 15. [2020-10-28 15:05:31,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-10-28 15:05:31,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2020-10-28 15:05:31,572 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 11 [2020-10-28 15:05:31,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:05:31,573 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2020-10-28 15:05:31,573 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-28 15:05:31,573 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2020-10-28 15:05:31,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-28 15:05:31,574 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:05:31,574 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:05:31,574 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 15:05:31,575 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:05:31,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:05:31,576 INFO L82 PathProgramCache]: Analyzing trace with hash 1840011497, now seen corresponding path program 1 times [2020-10-28 15:05:31,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:05:31,576 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1925281123] [2020-10-28 15:05:31,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:05:31,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:05:31,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:31,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:31,818 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:05:31,819 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-28 15:05:31,819 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:05:31,819 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 218 [2020-10-28 15:05:31,819 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:05:31,820 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:05:31,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 15:05:31,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-28 15:05:31,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 15:05:31,820 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:05:31,904 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:05:31,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:05:31,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:31,920 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:05:31,921 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:05:31,921 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:05:31,921 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 15:05:31,922 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:05:31,922 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:05:31,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:05:31,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:05:31,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:05:31,923 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:05:31,930 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 15:05:31,930 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1925281123] [2020-10-28 15:05:31,931 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 15:05:31,931 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 15:05:31,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467712237] [2020-10-28 15:05:31,933 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 15:05:31,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:05:31,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 15:05:31,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 15:05:31,935 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 4 states. [2020-10-28 15:05:32,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:05:32,047 INFO L93 Difference]: Finished difference Result 27 states and 30 transitions. [2020-10-28 15:05:32,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 15:05:32,047 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2020-10-28 15:05:32,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:05:32,049 INFO L225 Difference]: With dead ends: 27 [2020-10-28 15:05:32,049 INFO L226 Difference]: Without dead ends: 20 [2020-10-28 15:05:32,050 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 15:05:32,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-10-28 15:05:32,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 17. [2020-10-28 15:05:32,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-10-28 15:05:32,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2020-10-28 15:05:32,058 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 11 [2020-10-28 15:05:32,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:05:32,059 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2020-10-28 15:05:32,059 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 15:05:32,059 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2020-10-28 15:05:32,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-28 15:05:32,060 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:05:32,060 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:05:32,060 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 15:05:32,061 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:05:32,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:05:32,061 INFO L82 PathProgramCache]: Analyzing trace with hash -373684397, now seen corresponding path program 1 times [2020-10-28 15:05:32,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:05:32,062 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2120966103] [2020-10-28 15:05:32,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:05:32,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:05:32,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:32,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:32,586 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:05:32,586 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-28 15:05:32,586 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:05:32,587 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 498 [2020-10-28 15:05:32,587 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:05:32,587 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:05:32,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 15:05:32,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-28 15:05:32,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-28 15:05:32,588 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:05:32,669 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:05:32,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:05:32,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:32,684 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:05:32,685 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:05:32,685 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:05:32,685 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 15:05:32,685 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:05:32,686 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:05:32,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:05:32,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:05:32,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:05:32,686 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:05:32,692 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 15:05:32,693 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2120966103] [2020-10-28 15:05:32,693 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:05:32,693 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 15:05:32,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927653843] [2020-10-28 15:05:32,694 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 15:05:32,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:05:32,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 15:05:32,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 15:05:32,695 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 5 states. [2020-10-28 15:05:32,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:05:32,806 INFO L93 Difference]: Finished difference Result 33 states and 36 transitions. [2020-10-28 15:05:32,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 15:05:32,807 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-10-28 15:05:32,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:05:32,808 INFO L225 Difference]: With dead ends: 33 [2020-10-28 15:05:32,808 INFO L226 Difference]: Without dead ends: 25 [2020-10-28 15:05:32,809 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 15:05:32,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-10-28 15:05:32,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2020-10-28 15:05:32,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-28 15:05:32,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2020-10-28 15:05:32,816 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 16 [2020-10-28 15:05:32,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:05:32,816 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2020-10-28 15:05:32,816 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 15:05:32,816 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2020-10-28 15:05:32,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-28 15:05:32,817 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:05:32,818 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:05:32,818 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 15:05:32,818 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:05:32,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:05:32,819 INFO L82 PathProgramCache]: Analyzing trace with hash 2072037349, now seen corresponding path program 2 times [2020-10-28 15:05:32,819 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:05:32,819 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1312955857] [2020-10-28 15:05:32,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:05:32,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:05:32,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:32,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:33,812 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:05:33,812 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-28 15:05:33,812 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:05:33,813 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 975 [2020-10-28 15:05:33,813 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:05:33,813 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:05:33,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 15:05:33,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-28 15:05:33,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-28 15:05:33,814 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:05:33,914 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:05:33,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:05:33,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:33,933 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:05:33,933 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:05:33,933 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:05:33,934 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-28 15:05:33,935 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:05:33,938 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:05:33,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:05:33,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:05:33,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:05:33,939 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-28 15:05:33,947 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-28 15:05:33,948 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1312955857] [2020-10-28 15:05:33,949 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:05:33,949 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 15:05:33,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267706113] [2020-10-28 15:05:33,950 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 15:05:33,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:05:33,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 15:05:33,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-28 15:05:33,960 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 6 states. [2020-10-28 15:05:34,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:05:34,098 INFO L93 Difference]: Finished difference Result 41 states and 44 transitions. [2020-10-28 15:05:34,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 15:05:34,098 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2020-10-28 15:05:34,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:05:34,099 INFO L225 Difference]: With dead ends: 41 [2020-10-28 15:05:34,099 INFO L226 Difference]: Without dead ends: 30 [2020-10-28 15:05:34,100 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 15:05:34,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-28 15:05:34,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 27. [2020-10-28 15:05:34,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-28 15:05:34,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-10-28 15:05:34,112 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 21 [2020-10-28 15:05:34,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:05:34,112 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-10-28 15:05:34,112 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 15:05:34,112 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-10-28 15:05:34,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-28 15:05:34,114 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:05:34,114 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:05:34,114 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 15:05:34,114 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:05:34,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:05:34,116 INFO L82 PathProgramCache]: Analyzing trace with hash -767325097, now seen corresponding path program 3 times [2020-10-28 15:05:34,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:05:34,116 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [10094377] [2020-10-28 15:05:34,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:05:34,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:05:34,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:34,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:36,120 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:05:36,121 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-28 15:05:36,121 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:05:36,121 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1980 [2020-10-28 15:05:36,121 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:05:36,121 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:05:36,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 15:05:36,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-28 15:05:36,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-28 15:05:36,122 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:05:36,242 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:05:36,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:05:36,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:36,253 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:05:36,253 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:05:36,253 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:05:36,254 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 15:05:36,254 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:05:36,254 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:05:36,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:05:36,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:05:36,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:05:36,255 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:05:36,261 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-28 15:05:36,262 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [10094377] [2020-10-28 15:05:36,262 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:05:36,262 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 15:05:36,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427157051] [2020-10-28 15:05:36,264 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 15:05:36,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:05:36,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 15:05:36,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 15:05:36,276 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 7 states. [2020-10-28 15:05:36,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:05:36,427 INFO L93 Difference]: Finished difference Result 49 states and 52 transitions. [2020-10-28 15:05:36,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 15:05:36,428 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 26 [2020-10-28 15:05:36,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:05:36,428 INFO L225 Difference]: With dead ends: 49 [2020-10-28 15:05:36,429 INFO L226 Difference]: Without dead ends: 35 [2020-10-28 15:05:36,429 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 15:05:36,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-28 15:05:36,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32. [2020-10-28 15:05:36,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-28 15:05:36,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2020-10-28 15:05:36,437 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 26 [2020-10-28 15:05:36,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:05:36,437 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2020-10-28 15:05:36,437 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 15:05:36,437 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2020-10-28 15:05:36,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-28 15:05:36,438 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:05:36,438 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:05:36,438 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 15:05:36,439 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:05:36,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:05:36,439 INFO L82 PathProgramCache]: Analyzing trace with hash -1033879839, now seen corresponding path program 4 times [2020-10-28 15:05:36,440 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:05:36,440 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [592621135] [2020-10-28 15:05:36,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:05:36,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:05:36,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:36,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:40,174 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:05:40,175 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-28 15:05:40,175 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:05:40,175 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3714 [2020-10-28 15:05:40,176 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:05:40,176 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:05:40,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 15:05:40,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-28 15:05:40,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-28 15:05:40,177 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:05:40,308 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:05:40,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:05:40,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:40,323 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:05:40,324 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:05:40,324 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:05:40,324 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-28 15:05:40,325 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:05:40,326 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:05:40,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:05:40,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:05:40,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:05:40,330 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-28 15:05:40,353 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-28 15:05:40,353 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [592621135] [2020-10-28 15:05:40,354 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:05:40,354 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 15:05:40,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352893304] [2020-10-28 15:05:40,356 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 15:05:40,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:05:40,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 15:05:40,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-28 15:05:40,360 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand 8 states. [2020-10-28 15:05:40,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:05:40,613 INFO L93 Difference]: Finished difference Result 57 states and 60 transitions. [2020-10-28 15:05:40,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 15:05:40,614 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 31 [2020-10-28 15:05:40,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:05:40,615 INFO L225 Difference]: With dead ends: 57 [2020-10-28 15:05:40,616 INFO L226 Difference]: Without dead ends: 40 [2020-10-28 15:05:40,617 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 15:05:40,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-28 15:05:40,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 37. [2020-10-28 15:05:40,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-28 15:05:40,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2020-10-28 15:05:40,631 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 31 [2020-10-28 15:05:40,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:05:40,631 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2020-10-28 15:05:40,631 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 15:05:40,632 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2020-10-28 15:05:40,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-28 15:05:40,633 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:05:40,633 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:05:40,634 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 15:05:40,634 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:05:40,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:05:40,634 INFO L82 PathProgramCache]: Analyzing trace with hash 1765026139, now seen corresponding path program 5 times [2020-10-28 15:05:40,635 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:05:40,635 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1817109514] [2020-10-28 15:05:40,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:05:40,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:05:40,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:40,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:45,699 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:05:45,699 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-28 15:05:45,699 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:05:45,700 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5033 [2020-10-28 15:05:45,700 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:05:45,700 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:05:45,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 15:05:45,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-28 15:05:45,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-28 15:05:45,701 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:05:45,855 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:05:45,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:05:45,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:45,866 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:05:45,867 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:05:45,867 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:05:45,867 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 15:05:45,867 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:05:45,868 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:05:45,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:05:45,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:05:45,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:05:45,868 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:05:45,875 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-28 15:05:45,877 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1817109514] [2020-10-28 15:05:45,877 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:05:45,877 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-28 15:05:45,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238648102] [2020-10-28 15:05:45,879 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 15:05:45,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:05:45,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 15:05:45,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-10-28 15:05:45,880 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand 9 states. [2020-10-28 15:05:46,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:05:46,127 INFO L93 Difference]: Finished difference Result 65 states and 68 transitions. [2020-10-28 15:05:46,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 15:05:46,128 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 36 [2020-10-28 15:05:46,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:05:46,129 INFO L225 Difference]: With dead ends: 65 [2020-10-28 15:05:46,130 INFO L226 Difference]: Without dead ends: 45 [2020-10-28 15:05:46,131 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 15:05:46,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-28 15:05:46,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 42. [2020-10-28 15:05:46,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-28 15:05:46,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2020-10-28 15:05:46,145 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 36 [2020-10-28 15:05:46,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:05:46,146 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2020-10-28 15:05:46,146 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 15:05:46,146 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2020-10-28 15:05:46,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-28 15:05:46,150 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:05:46,150 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:05:46,150 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 15:05:46,150 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:05:46,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:05:46,153 INFO L82 PathProgramCache]: Analyzing trace with hash -2061074979, now seen corresponding path program 6 times [2020-10-28 15:05:46,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:05:46,154 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1244543057] [2020-10-28 15:05:46,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:05:46,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:05:46,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:46,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:51,212 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:05:51,212 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-28 15:05:51,212 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:05:51,212 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5023 [2020-10-28 15:05:51,212 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:05:51,213 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:05:51,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 15:05:51,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-28 15:05:51,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-28 15:05:51,213 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:05:51,373 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:05:51,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:05:51,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:51,383 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:05:51,383 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:05:51,383 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:05:51,383 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 15:05:51,383 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:05:51,384 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:05:51,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:05:51,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:05:51,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:05:51,384 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:05:51,394 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-28 15:05:51,395 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1244543057] [2020-10-28 15:05:51,395 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:05:51,395 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 15:05:51,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747713019] [2020-10-28 15:05:51,397 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 15:05:51,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:05:51,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 15:05:51,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-28 15:05:51,399 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 10 states. [2020-10-28 15:05:51,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:05:51,677 INFO L93 Difference]: Finished difference Result 73 states and 76 transitions. [2020-10-28 15:05:51,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 15:05:51,677 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 41 [2020-10-28 15:05:51,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:05:51,679 INFO L225 Difference]: With dead ends: 73 [2020-10-28 15:05:51,679 INFO L226 Difference]: Without dead ends: 50 [2020-10-28 15:05:51,680 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 15:05:51,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-28 15:05:51,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 47. [2020-10-28 15:05:51,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-28 15:05:51,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2020-10-28 15:05:51,697 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 41 [2020-10-28 15:05:51,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:05:51,698 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2020-10-28 15:05:51,698 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 15:05:51,698 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2020-10-28 15:05:51,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-28 15:05:51,699 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:05:51,699 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:05:51,700 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 15:05:51,700 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:05:51,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:05:51,701 INFO L82 PathProgramCache]: Analyzing trace with hash 414195295, now seen corresponding path program 7 times [2020-10-28 15:05:51,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:05:51,702 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [218539770] [2020-10-28 15:05:51,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:05:51,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:05:51,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:52,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:56,790 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:05:56,791 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-28 15:05:56,791 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:05:56,791 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5062 [2020-10-28 15:05:56,791 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:05:56,791 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:05:56,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 15:05:56,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-28 15:05:56,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-28 15:05:56,792 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:05:56,975 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:05:56,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:05:56,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:56,983 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:05:56,984 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:05:56,984 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:05:56,984 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 15:05:56,984 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:05:56,985 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:05:56,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:05:56,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:05:56,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:05:56,985 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:05:56,995 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-10-28 15:05:56,997 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [218539770] [2020-10-28 15:05:56,997 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:05:56,997 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 15:05:56,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041873506] [2020-10-28 15:05:56,998 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 15:05:56,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:05:57,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 15:05:57,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-28 15:05:57,000 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand 11 states. [2020-10-28 15:05:57,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:05:57,294 INFO L93 Difference]: Finished difference Result 81 states and 84 transitions. [2020-10-28 15:05:57,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 15:05:57,295 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 46 [2020-10-28 15:05:57,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:05:57,296 INFO L225 Difference]: With dead ends: 81 [2020-10-28 15:05:57,296 INFO L226 Difference]: Without dead ends: 55 [2020-10-28 15:05:57,298 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 15:05:57,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-28 15:05:57,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 52. [2020-10-28 15:05:57,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-28 15:05:57,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 53 transitions. [2020-10-28 15:05:57,312 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 53 transitions. Word has length 46 [2020-10-28 15:05:57,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:05:57,312 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 53 transitions. [2020-10-28 15:05:57,312 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 15:05:57,312 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 53 transitions. [2020-10-28 15:05:57,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-28 15:05:57,314 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:05:57,314 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:05:57,315 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 15:05:57,315 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:05:57,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:05:57,317 INFO L82 PathProgramCache]: Analyzing trace with hash -1951447847, now seen corresponding path program 8 times [2020-10-28 15:05:57,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:05:57,317 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1554433481] [2020-10-28 15:05:57,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:05:57,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:05:57,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:57,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:02,414 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:02,414 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-28 15:06:02,414 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:06:02,415 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5060 [2020-10-28 15:06:02,415 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:02,415 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:02,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 15:06:02,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-28 15:06:02,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-28 15:06:02,416 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:02,650 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:06:02,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:02,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:02,657 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:02,658 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:06:02,658 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:06:02,658 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 15:06:02,658 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:02,658 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:02,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:06:02,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:06:02,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:06:02,659 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:02,670 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-10-28 15:06:02,670 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1554433481] [2020-10-28 15:06:02,670 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:06:02,671 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 15:06:02,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889268959] [2020-10-28 15:06:02,673 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 15:06:02,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:06:02,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 15:06:02,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-10-28 15:06:02,674 INFO L87 Difference]: Start difference. First operand 52 states and 53 transitions. Second operand 12 states. [2020-10-28 15:06:03,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:06:03,051 INFO L93 Difference]: Finished difference Result 89 states and 92 transitions. [2020-10-28 15:06:03,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 15:06:03,052 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 51 [2020-10-28 15:06:03,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:06:03,053 INFO L225 Difference]: With dead ends: 89 [2020-10-28 15:06:03,054 INFO L226 Difference]: Without dead ends: 60 [2020-10-28 15:06:03,054 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 15:06:03,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-28 15:06:03,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 57. [2020-10-28 15:06:03,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-28 15:06:03,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2020-10-28 15:06:03,071 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 51 [2020-10-28 15:06:03,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:06:03,071 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2020-10-28 15:06:03,071 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 15:06:03,071 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2020-10-28 15:06:03,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-28 15:06:03,074 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:06:03,074 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:06:03,074 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 15:06:03,074 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:06:03,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:06:03,075 INFO L82 PathProgramCache]: Analyzing trace with hash 131836771, now seen corresponding path program 9 times [2020-10-28 15:06:03,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:06:03,075 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1430373245] [2020-10-28 15:06:03,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:06:03,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:03,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:05,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:08,221 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:08,221 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-28 15:06:08,221 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:06:08,221 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5103 [2020-10-28 15:06:08,221 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:08,222 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:08,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 15:06:08,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-28 15:06:08,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-28 15:06:08,222 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:08,454 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:06:08,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:08,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:08,462 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:08,463 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:06:08,464 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:06:08,464 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 15:06:08,464 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:08,464 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:08,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:06:08,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:06:08,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:06:08,465 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:08,494 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-10-28 15:06:08,495 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1430373245] [2020-10-28 15:06:08,495 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:06:08,495 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 15:06:08,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460571576] [2020-10-28 15:06:08,496 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 15:06:08,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:06:08,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 15:06:08,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-10-28 15:06:08,497 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 13 states. [2020-10-28 15:06:08,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:06:08,954 INFO L93 Difference]: Finished difference Result 97 states and 100 transitions. [2020-10-28 15:06:08,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 15:06:08,955 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 56 [2020-10-28 15:06:08,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:06:08,956 INFO L225 Difference]: With dead ends: 97 [2020-10-28 15:06:08,956 INFO L226 Difference]: Without dead ends: 65 [2020-10-28 15:06:08,956 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2020-10-28 15:06:08,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-28 15:06:08,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 62. [2020-10-28 15:06:08,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-28 15:06:08,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 63 transitions. [2020-10-28 15:06:08,964 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 63 transitions. Word has length 56 [2020-10-28 15:06:08,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:06:08,965 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 63 transitions. [2020-10-28 15:06:08,965 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 15:06:08,965 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 63 transitions. [2020-10-28 15:06:08,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-28 15:06:08,966 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:06:08,966 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:06:08,966 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 15:06:08,966 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:06:08,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:06:08,967 INFO L82 PathProgramCache]: Analyzing trace with hash -1630121003, now seen corresponding path program 10 times [2020-10-28 15:06:08,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:06:08,967 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2090226649] [2020-10-28 15:06:08,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:06:08,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:09,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:11,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:14,206 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:14,206 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-28 15:06:14,206 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:06:14,206 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5207 [2020-10-28 15:06:14,207 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:14,207 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:14,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 15:06:14,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-28 15:06:14,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-28 15:06:14,207 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:14,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:06:14,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:14,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:14,512 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:14,512 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:06:14,512 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:06:14,513 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 15:06:14,513 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:14,513 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:14,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:06:14,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:06:14,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:06:14,514 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:14,527 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-10-28 15:06:14,527 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2090226649] [2020-10-28 15:06:14,528 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:06:14,528 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 15:06:14,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616932978] [2020-10-28 15:06:14,528 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 15:06:14,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:06:14,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 15:06:14,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2020-10-28 15:06:14,530 INFO L87 Difference]: Start difference. First operand 62 states and 63 transitions. Second operand 14 states. [2020-10-28 15:06:15,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:06:15,120 INFO L93 Difference]: Finished difference Result 105 states and 108 transitions. [2020-10-28 15:06:15,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-28 15:06:15,120 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 61 [2020-10-28 15:06:15,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:06:15,121 INFO L225 Difference]: With dead ends: 105 [2020-10-28 15:06:15,121 INFO L226 Difference]: Without dead ends: 70 [2020-10-28 15:06:15,122 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 15:06:15,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-28 15:06:15,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 67. [2020-10-28 15:06:15,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-28 15:06:15,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 68 transitions. [2020-10-28 15:06:15,142 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 68 transitions. Word has length 61 [2020-10-28 15:06:15,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:06:15,143 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 68 transitions. [2020-10-28 15:06:15,143 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 15:06:15,143 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 68 transitions. [2020-10-28 15:06:15,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-28 15:06:15,144 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:06:15,144 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:06:15,144 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 15:06:15,144 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:06:15,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:06:15,145 INFO L82 PathProgramCache]: Analyzing trace with hash -1629810585, now seen corresponding path program 11 times [2020-10-28 15:06:15,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:06:15,145 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [159194998] [2020-10-28 15:06:15,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:06:15,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:15,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:18,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:20,295 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:20,296 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-28 15:06:20,296 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:06:20,296 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5114 [2020-10-28 15:06:20,296 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:20,296 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:20,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-28 15:06:20,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 35 [2020-10-28 15:06:20,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-28 15:06:20,297 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:20,582 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:06:20,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:20,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:20,588 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:20,588 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:06:20,588 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:06:20,588 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:06:20,589 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:20,589 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:20,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:06:20,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:06:20,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:06:20,589 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:20,602 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2020-10-28 15:06:20,602 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [159194998] [2020-10-28 15:06:20,602 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:06:20,602 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-28 15:06:20,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046176636] [2020-10-28 15:06:20,603 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-28 15:06:20,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:06:20,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-28 15:06:20,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2020-10-28 15:06:20,604 INFO L87 Difference]: Start difference. First operand 67 states and 68 transitions. Second operand 15 states. [2020-10-28 15:06:21,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:06:21,232 INFO L93 Difference]: Finished difference Result 113 states and 116 transitions. [2020-10-28 15:06:21,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-28 15:06:21,235 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 66 [2020-10-28 15:06:21,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:06:21,236 INFO L225 Difference]: With dead ends: 113 [2020-10-28 15:06:21,236 INFO L226 Difference]: Without dead ends: 75 [2020-10-28 15:06:21,237 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 15:06:21,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-28 15:06:21,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 72. [2020-10-28 15:06:21,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-28 15:06:21,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2020-10-28 15:06:21,246 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 66 [2020-10-28 15:06:21,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:06:21,246 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2020-10-28 15:06:21,246 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-28 15:06:21,246 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2020-10-28 15:06:21,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-28 15:06:21,247 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:06:21,248 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:06:21,248 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-28 15:06:21,248 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:06:21,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:06:21,249 INFO L82 PathProgramCache]: Analyzing trace with hash 74934993, now seen corresponding path program 12 times [2020-10-28 15:06:21,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:06:21,249 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1769721822] [2020-10-28 15:06:21,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:06:21,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:21,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:26,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:26,510 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:26,510 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-28 15:06:26,510 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:06:26,510 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5229 [2020-10-28 15:06:26,510 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:26,511 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:26,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 15:06:26,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 37 [2020-10-28 15:06:26,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-28 15:06:26,511 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:26,885 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:06:26,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:26,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:26,893 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:26,893 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:06:26,893 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:06:26,893 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 15:06:26,893 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:26,894 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:26,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:06:26,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:06:26,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:06:26,894 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:26,917 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2020-10-28 15:06:26,917 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1769721822] [2020-10-28 15:06:26,918 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:06:26,918 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-28 15:06:26,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259556477] [2020-10-28 15:06:26,919 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-28 15:06:26,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:06:26,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-28 15:06:26,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2020-10-28 15:06:26,920 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand 16 states. [2020-10-28 15:06:27,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:06:27,681 INFO L93 Difference]: Finished difference Result 121 states and 124 transitions. [2020-10-28 15:06:27,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-28 15:06:27,681 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 71 [2020-10-28 15:06:27,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:06:27,682 INFO L225 Difference]: With dead ends: 121 [2020-10-28 15:06:27,683 INFO L226 Difference]: Without dead ends: 80 [2020-10-28 15:06:27,683 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2020-10-28 15:06:27,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-28 15:06:27,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 77. [2020-10-28 15:06:27,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-28 15:06:27,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 78 transitions. [2020-10-28 15:06:27,692 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 78 transitions. Word has length 71 [2020-10-28 15:06:27,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:06:27,693 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 78 transitions. [2020-10-28 15:06:27,693 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-28 15:06:27,693 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 78 transitions. [2020-10-28 15:06:27,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-28 15:06:27,694 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:06:27,694 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:06:27,694 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-28 15:06:27,694 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:06:27,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:06:27,695 INFO L82 PathProgramCache]: Analyzing trace with hash 181570923, now seen corresponding path program 13 times [2020-10-28 15:06:27,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:06:27,695 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2036793570] [2020-10-28 15:06:27,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:06:27,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:27,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:27,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:33,075 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:33,075 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-28 15:06:33,075 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:06:33,075 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5346 [2020-10-28 15:06:33,075 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:33,075 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:33,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-28 15:06:33,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 39 [2020-10-28 15:06:33,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-28 15:06:33,076 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:33,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:06:33,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:33,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:33,551 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:33,552 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:06:33,552 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:06:33,552 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 15:06:33,552 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:33,553 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:33,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:06:33,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:06:33,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:06:33,554 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:06:33,581 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2020-10-28 15:06:33,581 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2036793570] [2020-10-28 15:06:33,581 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:06:33,582 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-28 15:06:33,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469755881] [2020-10-28 15:06:33,583 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-28 15:06:33,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:06:33,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-28 15:06:33,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2020-10-28 15:06:33,585 INFO L87 Difference]: Start difference. First operand 77 states and 78 transitions. Second operand 17 states. [2020-10-28 15:06:34,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:06:34,474 INFO L93 Difference]: Finished difference Result 129 states and 132 transitions. [2020-10-28 15:06:34,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-28 15:06:34,475 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 76 [2020-10-28 15:06:34,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:06:34,476 INFO L225 Difference]: With dead ends: 129 [2020-10-28 15:06:34,477 INFO L226 Difference]: Without dead ends: 85 [2020-10-28 15:06:34,477 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2020-10-28 15:06:34,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-28 15:06:34,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 82. [2020-10-28 15:06:34,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-28 15:06:34,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 83 transitions. [2020-10-28 15:06:34,496 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 83 transitions. Word has length 76 [2020-10-28 15:06:34,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:06:34,496 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 83 transitions. [2020-10-28 15:06:34,496 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-28 15:06:34,496 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 83 transitions. [2020-10-28 15:06:34,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-28 15:06:34,505 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:06:34,505 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:06:34,505 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-28 15:06:34,506 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:06:34,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:06:34,506 INFO L82 PathProgramCache]: Analyzing trace with hash -76658227, now seen corresponding path program 14 times [2020-10-28 15:06:34,506 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:06:34,507 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1673793363] [2020-10-28 15:06:34,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:06:34,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:34,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:39,594 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:39,594 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-28 15:06:39,594 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:06:39,594 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5044 [2020-10-28 15:06:39,594 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:39,594 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:39,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-28 15:06:39,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:06:39,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-28 15:06:39,595 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:39,966 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:06:39,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:39,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:39,976 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:39,977 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:06:39,977 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:06:39,977 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 15:06:39,977 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:39,977 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:39,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:06:39,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:06:39,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:06:39,978 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:39,993 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2020-10-28 15:06:39,994 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1673793363] [2020-10-28 15:06:39,997 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:06:39,997 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-28 15:06:39,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839142406] [2020-10-28 15:06:39,998 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-28 15:06:39,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:06:39,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-28 15:06:39,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2020-10-28 15:06:39,999 INFO L87 Difference]: Start difference. First operand 82 states and 83 transitions. Second operand 18 states. [2020-10-28 15:06:40,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:06:40,941 INFO L93 Difference]: Finished difference Result 137 states and 140 transitions. [2020-10-28 15:06:40,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-28 15:06:40,942 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 81 [2020-10-28 15:06:40,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:06:40,943 INFO L225 Difference]: With dead ends: 137 [2020-10-28 15:06:40,944 INFO L226 Difference]: Without dead ends: 90 [2020-10-28 15:06:40,946 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2020-10-28 15:06:40,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-28 15:06:40,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 87. [2020-10-28 15:06:40,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-28 15:06:40,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 88 transitions. [2020-10-28 15:06:40,959 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 88 transitions. Word has length 81 [2020-10-28 15:06:40,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:06:40,959 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 88 transitions. [2020-10-28 15:06:40,959 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-28 15:06:40,959 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 88 transitions. [2020-10-28 15:06:40,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-10-28 15:06:40,960 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:06:40,960 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:06:40,961 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-28 15:06:40,961 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:06:40,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:06:40,961 INFO L82 PathProgramCache]: Analyzing trace with hash -1041866129, now seen corresponding path program 15 times [2020-10-28 15:06:40,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:06:40,962 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [859746868] [2020-10-28 15:06:40,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:06:41,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:41,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:46,211 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:46,211 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-28 15:06:46,211 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:06:46,211 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5201 [2020-10-28 15:06:46,212 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:46,212 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:46,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-28 15:06:46,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:06:46,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-28 15:06:46,212 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:46,654 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:06:46,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:46,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:46,662 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:46,663 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:06:46,663 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:06:46,663 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 15:06:46,663 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:46,663 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:46,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:06:46,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:06:46,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:06:46,664 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:46,680 INFO L134 CoverageAnalysis]: Checked inductivity of 555 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2020-10-28 15:06:46,681 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [859746868] [2020-10-28 15:06:46,681 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:06:46,681 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-28 15:06:46,681 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134038304] [2020-10-28 15:06:46,682 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-28 15:06:46,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:06:46,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-28 15:06:46,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2020-10-28 15:06:46,687 INFO L87 Difference]: Start difference. First operand 87 states and 88 transitions. Second operand 19 states. [2020-10-28 15:06:47,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:06:47,708 INFO L93 Difference]: Finished difference Result 145 states and 148 transitions. [2020-10-28 15:06:47,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-28 15:06:47,709 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 86 [2020-10-28 15:06:47,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:06:47,710 INFO L225 Difference]: With dead ends: 145 [2020-10-28 15:06:47,710 INFO L226 Difference]: Without dead ends: 95 [2020-10-28 15:06:47,712 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 15:06:47,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-28 15:06:47,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 92. [2020-10-28 15:06:47,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-28 15:06:47,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 93 transitions. [2020-10-28 15:06:47,729 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 93 transitions. Word has length 86 [2020-10-28 15:06:47,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:06:47,730 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 93 transitions. [2020-10-28 15:06:47,730 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-28 15:06:47,730 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 93 transitions. [2020-10-28 15:06:47,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-10-28 15:06:47,731 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:06:47,731 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:06:47,731 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-28 15:06:47,731 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:06:47,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:06:47,735 INFO L82 PathProgramCache]: Analyzing trace with hash 932622537, now seen corresponding path program 16 times [2020-10-28 15:06:47,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:06:47,735 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1304459663] [2020-10-28 15:06:47,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:06:47,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:47,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:52,784 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:52,784 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 99 [2020-10-28 15:06:52,784 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:06:52,785 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-28 15:06:52,785 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:52,785 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:52,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-28 15:06:52,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:06:52,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-28 15:06:52,785 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:53,223 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:06:53,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:53,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:53,232 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:53,233 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:06:53,233 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:06:53,233 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 15:06:53,233 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:53,234 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:53,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:06:53,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:06:53,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:06:53,234 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:53,252 INFO L134 CoverageAnalysis]: Checked inductivity of 632 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2020-10-28 15:06:53,258 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1304459663] [2020-10-28 15:06:53,258 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:06:53,259 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-28 15:06:53,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042648428] [2020-10-28 15:06:53,262 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-28 15:06:53,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:06:53,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-28 15:06:53,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2020-10-28 15:06:53,265 INFO L87 Difference]: Start difference. First operand 92 states and 93 transitions. Second operand 20 states. [2020-10-28 15:06:54,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:06:54,344 INFO L93 Difference]: Finished difference Result 153 states and 156 transitions. [2020-10-28 15:06:54,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-28 15:06:54,344 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 91 [2020-10-28 15:06:54,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:06:54,346 INFO L225 Difference]: With dead ends: 153 [2020-10-28 15:06:54,346 INFO L226 Difference]: Without dead ends: 100 [2020-10-28 15:06:54,347 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2020-10-28 15:06:54,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-28 15:06:54,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 97. [2020-10-28 15:06:54,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-28 15:06:54,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 98 transitions. [2020-10-28 15:06:54,355 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 98 transitions. Word has length 91 [2020-10-28 15:06:54,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:06:54,356 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 98 transitions. [2020-10-28 15:06:54,356 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-28 15:06:54,356 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 98 transitions. [2020-10-28 15:06:54,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-10-28 15:06:54,357 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:06:54,357 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:06:54,357 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-28 15:06:54,357 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:06:54,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:06:54,358 INFO L82 PathProgramCache]: Analyzing trace with hash 121294707, now seen corresponding path program 17 times [2020-10-28 15:06:54,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:06:54,358 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1927403998] [2020-10-28 15:06:54,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:06:54,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:54,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:59,745 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:59,745 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-10-28 15:06:59,745 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:06:59,745 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5344 [2020-10-28 15:06:59,746 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:59,746 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:59,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-28 15:06:59,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:06:59,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-28 15:06:59,746 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:07:00,246 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:07:00,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:07:00,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:00,253 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:07:00,253 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:07:00,253 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:07:00,253 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:07:00,253 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:07:00,253 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:07:00,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:07:00,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:07:00,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:07:00,254 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:07:00,266 INFO L134 CoverageAnalysis]: Checked inductivity of 714 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2020-10-28 15:07:00,266 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1927403998] [2020-10-28 15:07:00,267 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:07:00,267 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-28 15:07:00,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629050584] [2020-10-28 15:07:00,267 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-28 15:07:00,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:07:00,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-28 15:07:00,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2020-10-28 15:07:00,269 INFO L87 Difference]: Start difference. First operand 97 states and 98 transitions. Second operand 21 states. [2020-10-28 15:07:01,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:07:01,463 INFO L93 Difference]: Finished difference Result 161 states and 164 transitions. [2020-10-28 15:07:01,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-28 15:07:01,463 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 96 [2020-10-28 15:07:01,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:07:01,465 INFO L225 Difference]: With dead ends: 161 [2020-10-28 15:07:01,465 INFO L226 Difference]: Without dead ends: 105 [2020-10-28 15:07:01,467 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 15:07:01,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-28 15:07:01,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 102. [2020-10-28 15:07:01,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-28 15:07:01,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 103 transitions. [2020-10-28 15:07:01,478 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 103 transitions. Word has length 96 [2020-10-28 15:07:01,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:07:01,478 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 103 transitions. [2020-10-28 15:07:01,478 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-28 15:07:01,478 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 103 transitions. [2020-10-28 15:07:01,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-10-28 15:07:01,480 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:07:01,480 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:07:01,480 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-28 15:07:01,480 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:07:01,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:07:01,481 INFO L82 PathProgramCache]: Analyzing trace with hash 1573674949, now seen corresponding path program 18 times [2020-10-28 15:07:01,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:07:01,481 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [566990482] [2020-10-28 15:07:01,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:07:01,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:07:01,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:06,997 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:07:06,998 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 109 [2020-10-28 15:07:06,998 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:07:06,998 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5472 [2020-10-28 15:07:06,998 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:07:06,998 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:07:06,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-28 15:07:06,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:07:06,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-28 15:07:06,998 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:07:07,543 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:07:07,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:07:07,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:07,551 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:07:07,551 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:07:07,552 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:07:07,552 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 15:07:07,552 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:07:07,552 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:07:07,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:07:07,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:07:07,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:07:07,553 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:07:07,568 INFO L134 CoverageAnalysis]: Checked inductivity of 801 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 477 trivial. 0 not checked. [2020-10-28 15:07:07,568 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [566990482] [2020-10-28 15:07:07,568 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:07:07,568 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-28 15:07:07,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212299274] [2020-10-28 15:07:07,569 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-28 15:07:07,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:07:07,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-28 15:07:07,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2020-10-28 15:07:07,570 INFO L87 Difference]: Start difference. First operand 102 states and 103 transitions. Second operand 22 states. [2020-10-28 15:07:08,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:07:08,943 INFO L93 Difference]: Finished difference Result 169 states and 172 transitions. [2020-10-28 15:07:08,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-28 15:07:08,943 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 101 [2020-10-28 15:07:08,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:07:08,945 INFO L225 Difference]: With dead ends: 169 [2020-10-28 15:07:08,945 INFO L226 Difference]: Without dead ends: 110 [2020-10-28 15:07:08,946 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2020-10-28 15:07:08,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-10-28 15:07:08,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 107. [2020-10-28 15:07:08,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-10-28 15:07:08,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 108 transitions. [2020-10-28 15:07:08,954 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 108 transitions. Word has length 101 [2020-10-28 15:07:08,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:07:08,954 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 108 transitions. [2020-10-28 15:07:08,954 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-28 15:07:08,954 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 108 transitions. [2020-10-28 15:07:08,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-10-28 15:07:08,956 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:07:08,956 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:07:08,956 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-28 15:07:08,956 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:07:08,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:07:08,957 INFO L82 PathProgramCache]: Analyzing trace with hash 1861489783, now seen corresponding path program 19 times [2020-10-28 15:07:08,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:07:08,957 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [650597154] [2020-10-28 15:07:08,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:07:08,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:07:09,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:14,352 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:07:14,352 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 114 [2020-10-28 15:07:14,352 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:07:14,352 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5359 [2020-10-28 15:07:14,353 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:07:14,353 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:07:14,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-28 15:07:14,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:07:14,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-28 15:07:14,353 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:07:14,944 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:07:14,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:07:14,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:14,952 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:07:14,952 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:07:14,953 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:07:14,953 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 15:07:14,953 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:07:14,953 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:07:14,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:07:14,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:07:14,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:07:14,953 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:07:14,970 INFO L134 CoverageAnalysis]: Checked inductivity of 893 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2020-10-28 15:07:14,971 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [650597154] [2020-10-28 15:07:14,971 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:07:14,971 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-28 15:07:14,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315365733] [2020-10-28 15:07:14,972 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-28 15:07:14,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:07:14,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-28 15:07:14,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2020-10-28 15:07:14,973 INFO L87 Difference]: Start difference. First operand 107 states and 108 transitions. Second operand 23 states. [2020-10-28 15:07:16,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:07:16,476 INFO L93 Difference]: Finished difference Result 177 states and 180 transitions. [2020-10-28 15:07:16,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-28 15:07:16,476 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 106 [2020-10-28 15:07:16,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:07:16,478 INFO L225 Difference]: With dead ends: 177 [2020-10-28 15:07:16,478 INFO L226 Difference]: Without dead ends: 115 [2020-10-28 15:07:16,479 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=67, Invalid=485, Unknown=0, NotChecked=0, Total=552 [2020-10-28 15:07:16,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-28 15:07:16,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 112. [2020-10-28 15:07:16,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-10-28 15:07:16,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 113 transitions. [2020-10-28 15:07:16,490 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 113 transitions. Word has length 106 [2020-10-28 15:07:16,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:07:16,490 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 113 transitions. [2020-10-28 15:07:16,490 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-28 15:07:16,490 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 113 transitions. [2020-10-28 15:07:16,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-10-28 15:07:16,491 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:07:16,491 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:07:16,491 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-28 15:07:16,491 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:07:16,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:07:16,492 INFO L82 PathProgramCache]: Analyzing trace with hash 2146113217, now seen corresponding path program 20 times [2020-10-28 15:07:16,492 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:07:16,492 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [172943086] [2020-10-28 15:07:16,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:07:16,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:07:16,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:22,809 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:07:22,809 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 119 [2020-10-28 15:07:22,810 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:07:22,810 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6273 [2020-10-28 15:07:22,810 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:07:22,810 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:07:22,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-28 15:07:22,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:07:22,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-28 15:07:22,810 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:07:23,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:07:23,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:07:23,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:23,432 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:07:23,432 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:07:23,432 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:07:23,432 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:07:23,432 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:07:23,432 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:07:23,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:07:23,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:07:23,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:07:23,433 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:07:23,447 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 590 trivial. 0 not checked. [2020-10-28 15:07:23,447 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [172943086] [2020-10-28 15:07:23,447 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:07:23,447 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-28 15:07:23,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307008399] [2020-10-28 15:07:23,448 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-28 15:07:23,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:07:23,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-28 15:07:23,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2020-10-28 15:07:23,449 INFO L87 Difference]: Start difference. First operand 112 states and 113 transitions. Second operand 24 states. [2020-10-28 15:07:25,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:07:25,101 INFO L93 Difference]: Finished difference Result 185 states and 188 transitions. [2020-10-28 15:07:25,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-28 15:07:25,103 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 111 [2020-10-28 15:07:25,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:07:25,104 INFO L225 Difference]: With dead ends: 185 [2020-10-28 15:07:25,104 INFO L226 Difference]: Without dead ends: 120 [2020-10-28 15:07:25,105 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2020-10-28 15:07:25,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-28 15:07:25,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 117. [2020-10-28 15:07:25,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-10-28 15:07:25,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 118 transitions. [2020-10-28 15:07:25,114 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 118 transitions. Word has length 111 [2020-10-28 15:07:25,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:07:25,114 INFO L481 AbstractCegarLoop]: Abstraction has 117 states and 118 transitions. [2020-10-28 15:07:25,114 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-28 15:07:25,114 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 118 transitions. [2020-10-28 15:07:25,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-10-28 15:07:25,116 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:07:25,116 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:07:25,116 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-28 15:07:25,116 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:07:25,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:07:25,117 INFO L82 PathProgramCache]: Analyzing trace with hash 1647735163, now seen corresponding path program 21 times [2020-10-28 15:07:25,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:07:25,117 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [291360395] [2020-10-28 15:07:25,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:07:25,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:07:25,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:30,367 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:07:30,367 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 124 [2020-10-28 15:07:30,367 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:07:30,367 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5196 [2020-10-28 15:07:30,368 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:07:30,368 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:07:30,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-28 15:07:30,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:07:30,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-28 15:07:30,368 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:07:31,051 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:07:31,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:07:31,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:31,057 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:07:31,057 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:07:31,057 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:07:31,057 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:07:31,057 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:07:31,058 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:07:31,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:07:31,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:07:31,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:07:31,058 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:07:31,073 INFO L134 CoverageAnalysis]: Checked inductivity of 1092 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 651 trivial. 0 not checked. [2020-10-28 15:07:31,073 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [291360395] [2020-10-28 15:07:31,073 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:07:31,074 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-28 15:07:31,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130537947] [2020-10-28 15:07:31,076 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-28 15:07:31,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:07:31,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-28 15:07:31,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2020-10-28 15:07:31,077 INFO L87 Difference]: Start difference. First operand 117 states and 118 transitions. Second operand 25 states. [2020-10-28 15:07:32,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:07:32,829 INFO L93 Difference]: Finished difference Result 193 states and 196 transitions. [2020-10-28 15:07:32,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-28 15:07:32,830 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 116 [2020-10-28 15:07:32,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:07:32,831 INFO L225 Difference]: With dead ends: 193 [2020-10-28 15:07:32,831 INFO L226 Difference]: Without dead ends: 125 [2020-10-28 15:07:32,832 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=73, Invalid=577, Unknown=0, NotChecked=0, Total=650 [2020-10-28 15:07:32,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-28 15:07:32,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 122. [2020-10-28 15:07:32,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-10-28 15:07:32,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 123 transitions. [2020-10-28 15:07:32,840 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 123 transitions. Word has length 116 [2020-10-28 15:07:32,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:07:32,840 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 123 transitions. [2020-10-28 15:07:32,840 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-28 15:07:32,840 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 123 transitions. [2020-10-28 15:07:32,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-10-28 15:07:32,841 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:07:32,841 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:07:32,842 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-28 15:07:32,842 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:07:32,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:07:32,842 INFO L82 PathProgramCache]: Analyzing trace with hash -1731291715, now seen corresponding path program 22 times [2020-10-28 15:07:32,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:07:32,843 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [117229199] [2020-10-28 15:07:32,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:07:32,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:07:32,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:38,274 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:07:38,275 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 129 [2020-10-28 15:07:38,275 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:07:38,275 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5379 [2020-10-28 15:07:38,275 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:07:38,275 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:07:38,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-28 15:07:38,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:07:38,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-28 15:07:38,276 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:07:38,944 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:07:38,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:07:38,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:38,949 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:07:38,949 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:07:38,949 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:07:38,949 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:07:38,950 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:07:38,950 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:07:38,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:07:38,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:07:38,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:07:38,950 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:07:38,966 INFO L134 CoverageAnalysis]: Checked inductivity of 1199 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2020-10-28 15:07:38,966 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [117229199] [2020-10-28 15:07:38,967 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:07:38,967 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-28 15:07:38,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676833514] [2020-10-28 15:07:38,967 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-28 15:07:38,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:07:38,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-28 15:07:38,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=579, Unknown=0, NotChecked=0, Total=650 [2020-10-28 15:07:38,968 INFO L87 Difference]: Start difference. First operand 122 states and 123 transitions. Second operand 26 states. [2020-10-28 15:07:40,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:07:40,834 INFO L93 Difference]: Finished difference Result 201 states and 204 transitions. [2020-10-28 15:07:40,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-28 15:07:40,835 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 121 [2020-10-28 15:07:40,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:07:40,837 INFO L225 Difference]: With dead ends: 201 [2020-10-28 15:07:40,837 INFO L226 Difference]: Without dead ends: 130 [2020-10-28 15:07:40,838 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=76, Invalid=626, Unknown=0, NotChecked=0, Total=702 [2020-10-28 15:07:40,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-10-28 15:07:40,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 127. [2020-10-28 15:07:40,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-10-28 15:07:40,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 128 transitions. [2020-10-28 15:07:40,846 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 128 transitions. Word has length 121 [2020-10-28 15:07:40,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:07:40,846 INFO L481 AbstractCegarLoop]: Abstraction has 127 states and 128 transitions. [2020-10-28 15:07:40,846 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-28 15:07:40,846 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 128 transitions. [2020-10-28 15:07:40,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-10-28 15:07:40,847 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:07:40,847 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:07:40,847 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-28 15:07:40,847 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:07:40,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:07:40,848 INFO L82 PathProgramCache]: Analyzing trace with hash -1557780865, now seen corresponding path program 23 times [2020-10-28 15:07:40,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:07:40,848 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1111326990] [2020-10-28 15:07:40,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:07:40,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:07:40,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:48,323 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:07:48,323 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 134 [2020-10-28 15:07:48,323 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:07:48,323 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7424 [2020-10-28 15:07:48,323 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:07:48,324 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:07:48,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-28 15:07:48,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:07:48,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-28 15:07:48,324 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:07:49,072 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:07:49,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:07:49,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:49,080 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:07:49,081 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:07:49,081 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:07:49,081 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 15:07:49,081 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:07:49,081 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:07:49,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:07:49,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:07:49,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:07:49,082 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:07:49,108 INFO L134 CoverageAnalysis]: Checked inductivity of 1311 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 782 trivial. 0 not checked. [2020-10-28 15:07:49,109 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1111326990] [2020-10-28 15:07:49,109 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:07:49,109 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-28 15:07:49,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383506913] [2020-10-28 15:07:49,110 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-28 15:07:49,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:07:49,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-28 15:07:49,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=628, Unknown=0, NotChecked=0, Total=702 [2020-10-28 15:07:49,111 INFO L87 Difference]: Start difference. First operand 127 states and 128 transitions. Second operand 27 states. [2020-10-28 15:07:51,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:07:51,249 INFO L93 Difference]: Finished difference Result 209 states and 212 transitions. [2020-10-28 15:07:51,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-28 15:07:51,250 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 126 [2020-10-28 15:07:51,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:07:51,252 INFO L225 Difference]: With dead ends: 209 [2020-10-28 15:07:51,252 INFO L226 Difference]: Without dead ends: 135 [2020-10-28 15:07:51,253 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=79, Invalid=677, Unknown=0, NotChecked=0, Total=756 [2020-10-28 15:07:51,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-10-28 15:07:51,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 132. [2020-10-28 15:07:51,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-10-28 15:07:51,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 133 transitions. [2020-10-28 15:07:51,261 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 133 transitions. Word has length 126 [2020-10-28 15:07:51,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:07:51,261 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 133 transitions. [2020-10-28 15:07:51,261 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-28 15:07:51,262 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 133 transitions. [2020-10-28 15:07:51,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-10-28 15:07:51,263 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:07:51,263 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:07:51,263 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-28 15:07:51,263 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:07:51,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:07:51,264 INFO L82 PathProgramCache]: Analyzing trace with hash 139631801, now seen corresponding path program 24 times [2020-10-28 15:07:51,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:07:51,264 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1158054901] [2020-10-28 15:07:51,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:07:51,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:07:51,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:58,067 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:07:58,067 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 139 [2020-10-28 15:07:58,067 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:07:58,067 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6740 [2020-10-28 15:07:58,067 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:07:58,067 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:07:58,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-28 15:07:58,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:07:58,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-28 15:07:58,068 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:07:58,855 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:07:58,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:07:58,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:58,861 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:07:58,861 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:07:58,861 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:07:58,861 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:07:58,861 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:07:58,862 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:07:58,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:07:58,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:07:58,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:07:58,862 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:07:58,881 INFO L134 CoverageAnalysis]: Checked inductivity of 1428 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 852 trivial. 0 not checked. [2020-10-28 15:07:58,881 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1158054901] [2020-10-28 15:07:58,881 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:07:58,882 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-28 15:07:58,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938182076] [2020-10-28 15:07:58,882 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-28 15:07:58,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:07:58,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-28 15:07:58,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=679, Unknown=0, NotChecked=0, Total=756 [2020-10-28 15:07:58,883 INFO L87 Difference]: Start difference. First operand 132 states and 133 transitions. Second operand 28 states. [2020-10-28 15:08:01,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:08:01,107 INFO L93 Difference]: Finished difference Result 217 states and 220 transitions. [2020-10-28 15:08:01,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-28 15:08:01,107 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 131 [2020-10-28 15:08:01,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:08:01,109 INFO L225 Difference]: With dead ends: 217 [2020-10-28 15:08:01,109 INFO L226 Difference]: Without dead ends: 140 [2020-10-28 15:08:01,110 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=82, Invalid=730, Unknown=0, NotChecked=0, Total=812 [2020-10-28 15:08:01,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-10-28 15:08:01,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 137. [2020-10-28 15:08:01,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-10-28 15:08:01,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 138 transitions. [2020-10-28 15:08:01,118 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 138 transitions. Word has length 131 [2020-10-28 15:08:01,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:08:01,118 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 138 transitions. [2020-10-28 15:08:01,118 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-28 15:08:01,119 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 138 transitions. [2020-10-28 15:08:01,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-10-28 15:08:01,120 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:08:01,120 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:08:01,120 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-28 15:08:01,121 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:08:01,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:08:01,121 INFO L82 PathProgramCache]: Analyzing trace with hash -790137981, now seen corresponding path program 25 times [2020-10-28 15:08:01,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:08:01,121 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2024773569] [2020-10-28 15:08:01,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:08:01,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:08:01,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:01,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:07,455 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:08:07,455 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 144 [2020-10-28 15:08:07,455 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:08:07,455 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6254 [2020-10-28 15:08:07,455 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:08:07,455 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:08:07,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-28 15:08:07,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 63 [2020-10-28 15:08:07,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-10-28 15:08:07,456 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:08:08,297 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:08:08,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:08:08,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:08,304 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:08:08,305 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:08:08,305 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:08:08,305 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:08:08,305 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:08:08,305 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:08:08,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:08:08,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:08:08,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:08:08,306 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:08:08,332 INFO L134 CoverageAnalysis]: Checked inductivity of 1550 backedges. 0 proven. 925 refuted. 0 times theorem prover too weak. 625 trivial. 0 not checked. [2020-10-28 15:08:08,332 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2024773569] [2020-10-28 15:08:08,333 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:08:08,333 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-28 15:08:08,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823578230] [2020-10-28 15:08:08,333 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-28 15:08:08,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:08:08,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-28 15:08:08,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=732, Unknown=0, NotChecked=0, Total=812 [2020-10-28 15:08:08,334 INFO L87 Difference]: Start difference. First operand 137 states and 138 transitions. Second operand 29 states. [2020-10-28 15:08:10,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:08:10,716 INFO L93 Difference]: Finished difference Result 225 states and 228 transitions. [2020-10-28 15:08:10,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-28 15:08:10,717 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 136 [2020-10-28 15:08:10,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:08:10,719 INFO L225 Difference]: With dead ends: 225 [2020-10-28 15:08:10,719 INFO L226 Difference]: Without dead ends: 145 [2020-10-28 15:08:10,720 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=85, Invalid=785, Unknown=0, NotChecked=0, Total=870 [2020-10-28 15:08:10,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-10-28 15:08:10,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 142. [2020-10-28 15:08:10,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-28 15:08:10,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 143 transitions. [2020-10-28 15:08:10,729 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 143 transitions. Word has length 136 [2020-10-28 15:08:10,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:08:10,730 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 143 transitions. [2020-10-28 15:08:10,730 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-28 15:08:10,730 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 143 transitions. [2020-10-28 15:08:10,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2020-10-28 15:08:10,734 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:08:10,734 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:08:10,734 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-28 15:08:10,734 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:08:10,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:08:10,735 INFO L82 PathProgramCache]: Analyzing trace with hash 257092533, now seen corresponding path program 26 times [2020-10-28 15:08:10,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:08:10,735 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1775178462] [2020-10-28 15:08:10,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:08:10,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:08:10,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:10,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:20,006 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:08:20,006 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 149 [2020-10-28 15:08:20,006 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:08:20,006 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9210 [2020-10-28 15:08:20,006 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:08:20,007 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:08:20,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-28 15:08:20,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 65 [2020-10-28 15:08:20,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-28 15:08:20,007 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:08:20,902 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:08:20,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:08:20,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:20,908 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:08:20,908 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:08:20,908 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:08:20,908 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:08:20,908 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:08:20,909 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:08:20,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:08:20,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:08:20,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:08:20,909 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:08:20,954 INFO L134 CoverageAnalysis]: Checked inductivity of 1677 backedges. 0 proven. 1001 refuted. 0 times theorem prover too weak. 676 trivial. 0 not checked. [2020-10-28 15:08:20,954 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1775178462] [2020-10-28 15:08:20,954 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:08:20,955 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-28 15:08:20,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935417408] [2020-10-28 15:08:20,955 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-28 15:08:20,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:08:20,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-28 15:08:20,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=787, Unknown=0, NotChecked=0, Total=870 [2020-10-28 15:08:20,956 INFO L87 Difference]: Start difference. First operand 142 states and 143 transitions. Second operand 30 states. [2020-10-28 15:08:23,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:08:23,550 INFO L93 Difference]: Finished difference Result 233 states and 236 transitions. [2020-10-28 15:08:23,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-28 15:08:23,551 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 141 [2020-10-28 15:08:23,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:08:23,552 INFO L225 Difference]: With dead ends: 233 [2020-10-28 15:08:23,552 INFO L226 Difference]: Without dead ends: 150 [2020-10-28 15:08:23,554 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=88, Invalid=842, Unknown=0, NotChecked=0, Total=930 [2020-10-28 15:08:23,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-10-28 15:08:23,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 147. [2020-10-28 15:08:23,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-10-28 15:08:23,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 148 transitions. [2020-10-28 15:08:23,561 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 148 transitions. Word has length 141 [2020-10-28 15:08:23,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:08:23,561 INFO L481 AbstractCegarLoop]: Abstraction has 147 states and 148 transitions. [2020-10-28 15:08:23,561 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-28 15:08:23,562 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 148 transitions. [2020-10-28 15:08:23,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-10-28 15:08:23,562 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:08:23,563 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:08:23,563 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-28 15:08:23,563 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:08:23,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:08:23,563 INFO L82 PathProgramCache]: Analyzing trace with hash -341927801, now seen corresponding path program 27 times [2020-10-28 15:08:23,564 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:08:23,564 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [121344945] [2020-10-28 15:08:23,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:08:23,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:08:23,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:33,510 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:08:33,510 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 154 [2020-10-28 15:08:33,510 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:08:33,510 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9883 [2020-10-28 15:08:33,511 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:08:33,511 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:08:33,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-28 15:08:33,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:08:33,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-28 15:08:33,511 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:08:34,473 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:08:34,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:08:34,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:34,479 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:08:34,480 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:08:34,480 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:08:34,480 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:08:34,480 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:08:34,480 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:08:34,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:08:34,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:08:34,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:08:34,481 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:08:34,504 INFO L134 CoverageAnalysis]: Checked inductivity of 1809 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 1080 trivial. 0 not checked. [2020-10-28 15:08:34,504 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [121344945] [2020-10-28 15:08:34,504 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:08:34,505 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-28 15:08:34,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34895206] [2020-10-28 15:08:34,505 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-28 15:08:34,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:08:34,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-28 15:08:34,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=844, Unknown=0, NotChecked=0, Total=930 [2020-10-28 15:08:34,506 INFO L87 Difference]: Start difference. First operand 147 states and 148 transitions. Second operand 31 states. [2020-10-28 15:08:37,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:08:37,360 INFO L93 Difference]: Finished difference Result 241 states and 244 transitions. [2020-10-28 15:08:37,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-28 15:08:37,361 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 146 [2020-10-28 15:08:37,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:08:37,362 INFO L225 Difference]: With dead ends: 241 [2020-10-28 15:08:37,363 INFO L226 Difference]: Without dead ends: 155 [2020-10-28 15:08:37,364 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=91, Invalid=901, Unknown=0, NotChecked=0, Total=992 [2020-10-28 15:08:37,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-10-28 15:08:37,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 152. [2020-10-28 15:08:37,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-10-28 15:08:37,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 153 transitions. [2020-10-28 15:08:37,373 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 153 transitions. Word has length 146 [2020-10-28 15:08:37,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:08:37,373 INFO L481 AbstractCegarLoop]: Abstraction has 152 states and 153 transitions. [2020-10-28 15:08:37,373 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-28 15:08:37,373 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 153 transitions. [2020-10-28 15:08:37,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2020-10-28 15:08:37,374 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:08:37,374 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:08:37,374 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-28 15:08:37,375 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:08:37,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:08:37,375 INFO L82 PathProgramCache]: Analyzing trace with hash 1269514929, now seen corresponding path program 28 times [2020-10-28 15:08:37,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:08:37,376 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [613634030] [2020-10-28 15:08:37,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:08:37,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:08:37,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:49,158 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:08:49,158 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 159 [2020-10-28 15:08:49,158 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:08:49,158 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11689 [2020-10-28 15:08:49,158 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:08:49,158 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:08:49,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-28 15:08:49,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:08:49,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-28 15:08:49,159 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:08:50,178 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:08:50,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:08:50,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:50,185 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:08:50,185 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:08:50,185 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:08:50,185 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:08:50,185 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:08:50,185 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:08:50,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:08:50,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:08:50,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:08:50,186 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:08:50,210 INFO L134 CoverageAnalysis]: Checked inductivity of 1946 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 1162 trivial. 0 not checked. [2020-10-28 15:08:50,210 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [613634030] [2020-10-28 15:08:50,210 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:08:50,210 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-28 15:08:50,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695075907] [2020-10-28 15:08:50,211 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-28 15:08:50,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:08:50,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-28 15:08:50,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=903, Unknown=0, NotChecked=0, Total=992 [2020-10-28 15:08:50,212 INFO L87 Difference]: Start difference. First operand 152 states and 153 transitions. Second operand 32 states. [2020-10-28 15:08:53,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:08:53,165 INFO L93 Difference]: Finished difference Result 249 states and 252 transitions. [2020-10-28 15:08:53,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-28 15:08:53,166 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 151 [2020-10-28 15:08:53,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:08:53,168 INFO L225 Difference]: With dead ends: 249 [2020-10-28 15:08:53,168 INFO L226 Difference]: Without dead ends: 160 [2020-10-28 15:08:53,169 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=94, Invalid=962, Unknown=0, NotChecked=0, Total=1056 [2020-10-28 15:08:53,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-10-28 15:08:53,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 157. [2020-10-28 15:08:53,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-10-28 15:08:53,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 158 transitions. [2020-10-28 15:08:53,178 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 158 transitions. Word has length 151 [2020-10-28 15:08:53,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:08:53,178 INFO L481 AbstractCegarLoop]: Abstraction has 157 states and 158 transitions. [2020-10-28 15:08:53,178 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-28 15:08:53,178 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 158 transitions. [2020-10-28 15:08:53,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2020-10-28 15:08:53,179 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:08:53,179 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:08:53,179 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-28 15:08:53,179 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:08:53,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:08:53,180 INFO L82 PathProgramCache]: Analyzing trace with hash -663759477, now seen corresponding path program 29 times [2020-10-28 15:08:53,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:08:53,181 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1616104557] [2020-10-28 15:08:53,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:08:53,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:08:53,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:02,607 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:09:02,608 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 164 [2020-10-28 15:09:02,608 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:09:02,608 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9329 [2020-10-28 15:09:02,608 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:09:02,608 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:09:02,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-28 15:09:02,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:09:02,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-28 15:09:02,609 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:09:03,608 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:09:03,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:09:03,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:03,614 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:09:03,614 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:09:03,614 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:09:03,614 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:09:03,614 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:09:03,614 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:09:03,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:09:03,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:09:03,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:09:03,615 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:09:03,639 INFO L134 CoverageAnalysis]: Checked inductivity of 2088 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 1247 trivial. 0 not checked. [2020-10-28 15:09:03,639 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1616104557] [2020-10-28 15:09:03,639 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:09:03,639 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-28 15:09:03,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831402538] [2020-10-28 15:09:03,640 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-28 15:09:03,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:09:03,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-28 15:09:03,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=964, Unknown=0, NotChecked=0, Total=1056 [2020-10-28 15:09:03,641 INFO L87 Difference]: Start difference. First operand 157 states and 158 transitions. Second operand 33 states. [2020-10-28 15:09:06,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:09:06,691 INFO L93 Difference]: Finished difference Result 257 states and 260 transitions. [2020-10-28 15:09:06,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-28 15:09:06,692 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 156 [2020-10-28 15:09:06,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:09:06,693 INFO L225 Difference]: With dead ends: 257 [2020-10-28 15:09:06,693 INFO L226 Difference]: Without dead ends: 165 [2020-10-28 15:09:06,694 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=97, Invalid=1025, Unknown=0, NotChecked=0, Total=1122 [2020-10-28 15:09:06,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-10-28 15:09:06,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 162. [2020-10-28 15:09:06,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-10-28 15:09:06,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 163 transitions. [2020-10-28 15:09:06,703 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 163 transitions. Word has length 156 [2020-10-28 15:09:06,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:09:06,703 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 163 transitions. [2020-10-28 15:09:06,703 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-28 15:09:06,704 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 163 transitions. [2020-10-28 15:09:06,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2020-10-28 15:09:06,704 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:09:06,705 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:09:06,705 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-28 15:09:06,705 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:09:06,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:09:06,706 INFO L82 PathProgramCache]: Analyzing trace with hash 876044717, now seen corresponding path program 30 times [2020-10-28 15:09:06,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:09:06,706 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1444430504] [2020-10-28 15:09:06,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:09:06,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:09:06,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking...