/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/loop-acceleration/simple_4-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 14:57:33,629 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 14:57:33,632 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 14:57:33,693 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 14:57:33,694 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 14:57:33,701 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 14:57:33,704 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 14:57:33,710 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 14:57:33,713 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 14:57:33,720 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 14:57:33,721 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 14:57:33,723 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 14:57:33,723 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 14:57:33,727 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 14:57:33,730 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 14:57:33,733 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 14:57:33,734 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 14:57:33,738 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 14:57:33,748 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 14:57:33,756 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 14:57:33,758 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 14:57:33,760 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 14:57:33,761 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 14:57:33,765 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 14:57:33,774 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 14:57:33,774 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 14:57:33,775 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 14:57:33,777 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 14:57:33,778 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 14:57:33,779 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 14:57:33,779 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 14:57:33,780 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 14:57:33,783 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 14:57:33,783 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 14:57:33,785 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 14:57:33,785 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 14:57:33,786 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 14:57:33,786 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 14:57:33,787 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 14:57:33,788 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 14:57:33,789 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 14:57:33,796 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 14:57:33,853 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 14:57:33,853 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 14:57:33,857 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 14:57:33,858 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 14:57:33,858 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 14:57:33,858 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 14:57:33,858 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 14:57:33,858 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 14:57:33,859 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 14:57:33,859 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 14:57:33,860 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 14:57:33,860 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 14:57:33,860 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 14:57:33,861 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 14:57:33,861 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 14:57:33,861 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 14:57:33,861 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 14:57:33,861 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 14:57:33,862 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 14:57:33,862 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 14:57:33,862 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 14:57:33,862 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 14:57:33,862 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 14:57:33,863 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 14:57:33,863 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 14:57:33,863 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 14:57:33,863 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 14:57:33,864 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 14:57:33,864 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 14:57:33,864 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 14:57:34,326 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 14:57:34,353 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 14:57:34,356 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 14:57:34,357 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 14:57:34,358 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 14:57:34,359 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/simple_4-1.c [2020-10-28 14:57:34,458 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/50e33b10b/067fee1b1d46446ab36cbd549a45e376/FLAGd1f242f15 [2020-10-28 14:57:35,212 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 14:57:35,213 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-acceleration/simple_4-1.c [2020-10-28 14:57:35,220 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/50e33b10b/067fee1b1d46446ab36cbd549a45e376/FLAGd1f242f15 [2020-10-28 14:57:35,565 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/50e33b10b/067fee1b1d46446ab36cbd549a45e376 [2020-10-28 14:57:35,568 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 14:57:35,578 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 14:57:35,582 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 14:57:35,582 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 14:57:35,587 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 14:57:35,588 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 02:57:35" (1/1) ... [2020-10-28 14:57:35,592 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@613cb519 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:57:35, skipping insertion in model container [2020-10-28 14:57:35,593 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 02:57:35" (1/1) ... [2020-10-28 14:57:35,602 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 14:57:35,618 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 14:57:35,774 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 14:57:35,789 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 14:57:35,808 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 14:57:35,828 INFO L208 MainTranslator]: Completed translation [2020-10-28 14:57:35,830 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:57:35 WrapperNode [2020-10-28 14:57:35,830 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 14:57:35,833 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 14:57:35,834 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 14:57:35,834 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 14:57:35,849 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:57:35" (1/1) ... [2020-10-28 14:57:35,852 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:57:35" (1/1) ... [2020-10-28 14:57:35,863 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:57:35" (1/1) ... [2020-10-28 14:57:35,864 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:57:35" (1/1) ... [2020-10-28 14:57:35,873 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:57:35" (1/1) ... [2020-10-28 14:57:35,883 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:57:35" (1/1) ... [2020-10-28 14:57:35,890 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:57:35" (1/1) ... [2020-10-28 14:57:35,896 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 14:57:35,898 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 14:57:35,899 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 14:57:35,899 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 14:57:35,900 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:57:35" (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 14:57:35,985 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 14:57:35,985 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 14:57:35,985 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 14:57:35,985 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-28 14:57:35,985 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 14:57:35,986 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 14:57:35,986 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 14:57:35,986 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 14:57:35,986 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 14:57:35,986 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-28 14:57:35,986 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 14:57:35,987 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 14:57:35,987 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 14:57:35,987 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 14:57:35,987 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 14:57:35,987 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 14:57:35,987 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 14:57:36,273 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 14:57:36,273 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-28 14:57:36,275 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 02:57:36 BoogieIcfgContainer [2020-10-28 14:57:36,275 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 14:57:36,278 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 14:57:36,278 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 14:57:36,282 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 14:57:36,282 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 02:57:35" (1/3) ... [2020-10-28 14:57:36,283 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38f2eea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 02:57:36, skipping insertion in model container [2020-10-28 14:57:36,284 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:57:35" (2/3) ... [2020-10-28 14:57:36,284 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38f2eea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 02:57:36, skipping insertion in model container [2020-10-28 14:57:36,284 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 02:57:36" (3/3) ... [2020-10-28 14:57:36,286 INFO L111 eAbstractionObserver]: Analyzing ICFG simple_4-1.c [2020-10-28 14:57:36,309 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 14:57:36,316 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 14:57:36,336 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 14:57:36,390 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 14:57:36,390 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 14:57:36,391 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 14:57:36,391 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 14:57:36,391 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 14:57:36,391 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 14:57:36,391 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 14:57:36,392 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 14:57:36,421 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2020-10-28 14:57:36,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-28 14:57:36,427 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:57:36,428 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:57:36,428 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:57:36,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:57:36,435 INFO L82 PathProgramCache]: Analyzing trace with hash 783588435, now seen corresponding path program 1 times [2020-10-28 14:57:36,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:57:36,446 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1586686310] [2020-10-28 14:57:36,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:57:36,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:57:36,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:36,792 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:57:36,793 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-28 14:57:36,793 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:57:36,793 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 186 [2020-10-28 14:57:36,796 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:57:36,796 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:57:36,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:57:36,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 14:57:36,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:57:36,797 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 14:57:37,003 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2020-10-28 14:57:37,006 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:57:37,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:57:37,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:37,051 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:57:37,052 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:57:37,052 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:57:37,052 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-10-28 14:57:37,052 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:57:37,052 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:57:37,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:57:37,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:57:37,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:57:37,053 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:57:37,070 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 14:57:37,071 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1586686310] [2020-10-28 14:57:37,073 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:57:37,073 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-28 14:57:37,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476928384] [2020-10-28 14:57:37,087 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-28 14:57:37,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:57:37,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-28 14:57:37,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-28 14:57:37,105 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 3 states. [2020-10-28 14:57:37,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:57:37,166 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2020-10-28 14:57:37,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-28 14:57:37,168 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2020-10-28 14:57:37,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:57:37,176 INFO L225 Difference]: With dead ends: 34 [2020-10-28 14:57:37,176 INFO L226 Difference]: Without dead ends: 13 [2020-10-28 14:57:37,180 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-28 14:57:37,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-10-28 14:57:37,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2020-10-28 14:57:37,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-10-28 14:57:37,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2020-10-28 14:57:37,222 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 12 [2020-10-28 14:57:37,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:57:37,223 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2020-10-28 14:57:37,223 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-28 14:57:37,223 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2020-10-28 14:57:37,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-28 14:57:37,224 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:57:37,224 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:57:37,225 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 14:57:37,225 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:57:37,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:57:37,226 INFO L82 PathProgramCache]: Analyzing trace with hash 669071831, now seen corresponding path program 1 times [2020-10-28 14:57:37,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:57:37,227 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1158304679] [2020-10-28 14:57:37,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:57:37,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:57:37,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:37,351 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:57:37,352 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-28 14:57:37,352 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:57:37,352 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 103 [2020-10-28 14:57:37,353 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:57:37,353 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:57:37,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:57:37,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:57:37,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 14:57:37,354 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:57:37,432 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:57:37,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:57:37,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:37,448 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:57:37,448 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:57:37,448 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:57:37,449 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 14:57:37,449 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:57:37,449 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:57:37,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:57:37,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:57:37,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:57:37,450 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:57:37,464 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 14:57:37,464 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1158304679] [2020-10-28 14:57:37,465 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:57:37,465 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 14:57:37,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948990508] [2020-10-28 14:57:37,470 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 14:57:37,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:57:37,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 14:57:37,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:57:37,472 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 4 states. [2020-10-28 14:57:37,648 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2020-10-28 14:57:37,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:57:37,713 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2020-10-28 14:57:37,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 14:57:37,714 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-10-28 14:57:37,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:57:37,715 INFO L225 Difference]: With dead ends: 20 [2020-10-28 14:57:37,715 INFO L226 Difference]: Without dead ends: 14 [2020-10-28 14:57:37,717 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:57:37,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-10-28 14:57:37,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-10-28 14:57:37,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-10-28 14:57:37,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2020-10-28 14:57:37,736 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2020-10-28 14:57:37,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:57:37,736 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2020-10-28 14:57:37,737 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 14:57:37,737 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2020-10-28 14:57:37,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-28 14:57:37,739 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:57:37,739 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:57:37,739 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 14:57:37,740 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:57:37,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:57:37,745 INFO L82 PathProgramCache]: Analyzing trace with hash 396678398, now seen corresponding path program 1 times [2020-10-28 14:57:37,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:57:37,745 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1419540279] [2020-10-28 14:57:37,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:57:37,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:57:37,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:37,891 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:57:37,891 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-28 14:57:37,891 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:57:37,892 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 100 [2020-10-28 14:57:37,892 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:57:37,892 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:57:37,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 14:57:37,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:57:37,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-28 14:57:37,893 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:57:37,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:57:37,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:57:37,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:37,972 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:57:37,972 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:57:37,972 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:57:37,972 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 14:57:37,973 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:57:37,973 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:57:37,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:57:37,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:57:37,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:57:37,974 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:57:37,980 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:57:37,980 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1419540279] [2020-10-28 14:57:37,980 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:57:37,981 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 14:57:37,981 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833833487] [2020-10-28 14:57:37,981 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 14:57:37,982 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:57:37,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 14:57:37,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:57:37,983 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 5 states. [2020-10-28 14:57:38,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:57:38,096 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2020-10-28 14:57:38,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 14:57:38,097 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-10-28 14:57:38,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:57:38,097 INFO L225 Difference]: With dead ends: 21 [2020-10-28 14:57:38,098 INFO L226 Difference]: Without dead ends: 15 [2020-10-28 14:57:38,098 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-28 14:57:38,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-10-28 14:57:38,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-10-28 14:57:38,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-10-28 14:57:38,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2020-10-28 14:57:38,105 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2020-10-28 14:57:38,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:57:38,105 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2020-10-28 14:57:38,105 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 14:57:38,105 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2020-10-28 14:57:38,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-28 14:57:38,106 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:57:38,106 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:57:38,106 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 14:57:38,107 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:57:38,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:57:38,107 INFO L82 PathProgramCache]: Analyzing trace with hash 542416567, now seen corresponding path program 2 times [2020-10-28 14:57:38,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:57:38,108 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [846060129] [2020-10-28 14:57:38,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:57:38,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:57:38,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:38,306 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:57:38,306 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-28 14:57:38,306 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:57:38,307 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 184 [2020-10-28 14:57:38,307 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:57:38,307 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:57:38,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 14:57:38,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:57:38,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-28 14:57:38,308 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:57:38,390 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:57:38,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:57:38,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:38,402 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:57:38,402 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:57:38,403 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:57:38,403 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 14:57:38,403 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:57:38,403 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:57:38,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:57:38,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:57:38,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:57:38,404 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:57:38,409 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:57:38,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [846060129] [2020-10-28 14:57:38,410 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:57:38,410 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 14:57:38,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954569766] [2020-10-28 14:57:38,411 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 14:57:38,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:57:38,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 14:57:38,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-28 14:57:38,412 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 6 states. [2020-10-28 14:57:38,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:57:38,573 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2020-10-28 14:57:38,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 14:57:38,573 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2020-10-28 14:57:38,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:57:38,574 INFO L225 Difference]: With dead ends: 22 [2020-10-28 14:57:38,574 INFO L226 Difference]: Without dead ends: 16 [2020-10-28 14:57:38,589 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-28 14:57:38,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-10-28 14:57:38,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-10-28 14:57:38,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-10-28 14:57:38,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2020-10-28 14:57:38,596 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2020-10-28 14:57:38,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:57:38,596 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2020-10-28 14:57:38,597 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 14:57:38,597 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2020-10-28 14:57:38,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-28 14:57:38,598 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:57:38,598 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:57:38,598 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 14:57:38,598 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:57:38,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:57:38,599 INFO L82 PathProgramCache]: Analyzing trace with hash 765332510, now seen corresponding path program 3 times [2020-10-28 14:57:38,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:57:38,600 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [460243957] [2020-10-28 14:57:38,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:57:38,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:57:38,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:38,787 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:57:38,788 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-28 14:57:38,788 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:57:38,788 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 174 [2020-10-28 14:57:38,788 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:57:38,789 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:57:38,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 14:57:38,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:57:38,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-28 14:57:38,789 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:57:38,896 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:57:38,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:57:38,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:38,910 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:57:38,910 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:57:38,910 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:57:38,911 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 14:57:38,911 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:57:38,911 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:57:38,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:57:38,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:57:38,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:57:38,912 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:57:38,922 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:57:38,923 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [460243957] [2020-10-28 14:57:38,923 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:57:38,923 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 14:57:38,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459823920] [2020-10-28 14:57:38,925 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 14:57:38,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:57:38,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 14:57:38,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 14:57:38,937 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 7 states. [2020-10-28 14:57:39,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:57:39,157 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2020-10-28 14:57:39,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 14:57:39,158 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 15 [2020-10-28 14:57:39,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:57:39,159 INFO L225 Difference]: With dead ends: 23 [2020-10-28 14:57:39,159 INFO L226 Difference]: Without dead ends: 17 [2020-10-28 14:57:39,162 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-28 14:57:39,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-10-28 14:57:39,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-10-28 14:57:39,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-10-28 14:57:39,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2020-10-28 14:57:39,170 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2020-10-28 14:57:39,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:57:39,171 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2020-10-28 14:57:39,171 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 14:57:39,171 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2020-10-28 14:57:39,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-28 14:57:39,173 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:57:39,173 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:57:39,173 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 14:57:39,173 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:57:39,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:57:39,174 INFO L82 PathProgramCache]: Analyzing trace with hash -914207849, now seen corresponding path program 4 times [2020-10-28 14:57:39,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:57:39,175 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1481383199] [2020-10-28 14:57:39,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:57:39,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:57:39,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:39,408 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:57:39,408 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-28 14:57:39,409 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:57:39,409 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 199 [2020-10-28 14:57:39,409 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:57:39,409 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:57:39,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 14:57:39,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:57:39,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 14:57:39,410 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:57:39,527 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:57:39,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:57:39,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:39,538 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:57:39,539 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:57:39,539 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:57:39,539 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 14:57:39,539 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:57:39,539 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:57:39,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:57:39,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:57:39,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:57:39,540 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:57:39,549 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:57:39,549 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1481383199] [2020-10-28 14:57:39,551 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:57:39,551 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 14:57:39,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782043811] [2020-10-28 14:57:39,553 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 14:57:39,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:57:39,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 14:57:39,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-28 14:57:39,556 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 8 states. [2020-10-28 14:57:39,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:57:39,814 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2020-10-28 14:57:39,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 14:57:39,818 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 16 [2020-10-28 14:57:39,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:57:39,818 INFO L225 Difference]: With dead ends: 24 [2020-10-28 14:57:39,818 INFO L226 Difference]: Without dead ends: 18 [2020-10-28 14:57:39,819 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-28 14:57:39,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-10-28 14:57:39,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-10-28 14:57:39,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-10-28 14:57:39,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2020-10-28 14:57:39,830 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 16 [2020-10-28 14:57:39,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:57:39,832 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2020-10-28 14:57:39,832 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 14:57:39,832 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2020-10-28 14:57:39,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-28 14:57:39,833 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:57:39,833 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:57:39,833 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 14:57:39,833 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:57:39,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:57:39,835 INFO L82 PathProgramCache]: Analyzing trace with hash -1440351426, now seen corresponding path program 5 times [2020-10-28 14:57:39,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:57:39,835 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [779535554] [2020-10-28 14:57:39,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:57:39,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:57:39,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:40,134 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:57:40,134 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-28 14:57:40,135 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:57:40,135 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 276 [2020-10-28 14:57:40,135 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:57:40,135 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:57:40,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 14:57:40,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:57:40,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-28 14:57:40,136 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:57:40,252 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:57:40,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:57:40,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:40,262 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:57:40,262 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:57:40,262 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:57:40,263 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 14:57:40,263 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:57:40,263 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:57:40,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:57:40,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:57:40,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:57:40,264 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:57:40,268 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:57:40,269 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [779535554] [2020-10-28 14:57:40,269 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:57:40,269 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-28 14:57:40,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800634285] [2020-10-28 14:57:40,270 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 14:57:40,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:57:40,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 14:57:40,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-10-28 14:57:40,271 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 9 states. [2020-10-28 14:57:40,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:57:40,572 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2020-10-28 14:57:40,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 14:57:40,573 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 17 [2020-10-28 14:57:40,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:57:40,574 INFO L225 Difference]: With dead ends: 25 [2020-10-28 14:57:40,574 INFO L226 Difference]: Without dead ends: 19 [2020-10-28 14:57:40,575 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-28 14:57:40,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-10-28 14:57:40,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-10-28 14:57:40,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-28 14:57:40,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2020-10-28 14:57:40,581 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 17 [2020-10-28 14:57:40,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:57:40,582 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2020-10-28 14:57:40,582 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 14:57:40,582 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2020-10-28 14:57:40,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-28 14:57:40,583 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:57:40,583 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:57:40,583 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 14:57:40,583 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:57:40,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:57:40,584 INFO L82 PathProgramCache]: Analyzing trace with hash -570933129, now seen corresponding path program 6 times [2020-10-28 14:57:40,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:57:40,584 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [362753770] [2020-10-28 14:57:40,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:57:40,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:57:40,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:40,807 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:57:40,807 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-28 14:57:40,807 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:57:40,808 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 206 [2020-10-28 14:57:40,808 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:57:40,808 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:57:40,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 14:57:40,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:57:40,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-28 14:57:40,809 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:57:40,937 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:57:40,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:57:40,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:40,946 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:57:40,947 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:57:40,947 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:57:40,947 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 14:57:40,947 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:57:40,947 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:57:40,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:57:40,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:57:40,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:57:40,948 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:57:40,953 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:57:40,954 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [362753770] [2020-10-28 14:57:40,954 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:57:40,954 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 14:57:40,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985707942] [2020-10-28 14:57:40,955 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 14:57:40,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:57:40,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 14:57:40,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-28 14:57:40,956 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 10 states. [2020-10-28 14:57:41,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:57:41,294 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2020-10-28 14:57:41,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 14:57:41,294 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2020-10-28 14:57:41,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:57:41,295 INFO L225 Difference]: With dead ends: 26 [2020-10-28 14:57:41,295 INFO L226 Difference]: Without dead ends: 20 [2020-10-28 14:57:41,296 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-10-28 14:57:41,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-10-28 14:57:41,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-10-28 14:57:41,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-28 14:57:41,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2020-10-28 14:57:41,303 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 18 [2020-10-28 14:57:41,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:57:41,303 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2020-10-28 14:57:41,303 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 14:57:41,303 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2020-10-28 14:57:41,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-28 14:57:41,304 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:57:41,304 INFO L422 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:57:41,304 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 14:57:41,305 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:57:41,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:57:41,305 INFO L82 PathProgramCache]: Analyzing trace with hash 611230302, now seen corresponding path program 7 times [2020-10-28 14:57:41,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:57:41,306 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [537183040] [2020-10-28 14:57:41,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:57:41,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:57:41,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:41,512 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:57:41,513 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-28 14:57:41,513 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:57:41,513 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 193 [2020-10-28 14:57:41,513 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:57:41,513 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:57:41,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 14:57:41,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:57:41,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-28 14:57:41,514 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:57:41,688 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:57:41,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:57:41,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:41,695 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:57:41,695 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:57:41,696 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:57:41,696 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:57:41,696 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:57:41,696 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:57:41,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:57:41,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:57:41,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:57:41,697 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:57:41,702 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:57:41,702 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [537183040] [2020-10-28 14:57:41,702 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:57:41,702 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 14:57:41,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636241693] [2020-10-28 14:57:41,703 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 14:57:41,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:57:41,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 14:57:41,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-28 14:57:41,704 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 11 states. [2020-10-28 14:57:42,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:57:42,178 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2020-10-28 14:57:42,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 14:57:42,178 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2020-10-28 14:57:42,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:57:42,179 INFO L225 Difference]: With dead ends: 27 [2020-10-28 14:57:42,179 INFO L226 Difference]: Without dead ends: 21 [2020-10-28 14:57:42,180 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2020-10-28 14:57:42,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-10-28 14:57:42,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-10-28 14:57:42,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-28 14:57:42,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2020-10-28 14:57:42,187 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 19 [2020-10-28 14:57:42,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:57:42,188 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2020-10-28 14:57:42,188 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 14:57:42,188 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2020-10-28 14:57:42,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-28 14:57:42,189 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:57:42,189 INFO L422 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:57:42,189 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 14:57:42,189 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:57:42,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:57:42,190 INFO L82 PathProgramCache]: Analyzing trace with hash -1396409001, now seen corresponding path program 8 times [2020-10-28 14:57:42,190 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:57:42,191 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1807870668] [2020-10-28 14:57:42,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:57:42,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:57:42,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:42,439 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:57:42,440 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-28 14:57:42,440 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:57:42,440 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 234 [2020-10-28 14:57:42,440 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:57:42,440 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:57:42,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 14:57:42,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:57:42,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-28 14:57:42,441 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:57:42,630 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:57:42,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:57:42,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:42,638 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:57:42,639 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:57:42,639 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:57:42,639 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 14:57:42,639 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:57:42,640 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:57:42,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:57:42,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:57:42,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:57:42,640 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:57:42,645 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:57:42,645 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1807870668] [2020-10-28 14:57:42,646 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:57:42,646 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 14:57:42,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996581642] [2020-10-28 14:57:42,647 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 14:57:42,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:57:42,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 14:57:42,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-10-28 14:57:42,648 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 12 states. [2020-10-28 14:57:43,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:57:43,193 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2020-10-28 14:57:43,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 14:57:43,194 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 20 [2020-10-28 14:57:43,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:57:43,195 INFO L225 Difference]: With dead ends: 28 [2020-10-28 14:57:43,195 INFO L226 Difference]: Without dead ends: 22 [2020-10-28 14:57:43,195 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2020-10-28 14:57:43,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-10-28 14:57:43,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-10-28 14:57:43,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-28 14:57:43,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2020-10-28 14:57:43,204 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 20 [2020-10-28 14:57:43,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:57:43,206 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2020-10-28 14:57:43,206 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 14:57:43,206 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2020-10-28 14:57:43,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-28 14:57:43,207 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:57:43,207 INFO L422 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:57:43,207 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 14:57:43,208 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:57:43,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:57:43,208 INFO L82 PathProgramCache]: Analyzing trace with hash 791282046, now seen corresponding path program 9 times [2020-10-28 14:57:43,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:57:43,209 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [822946181] [2020-10-28 14:57:43,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:57:43,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:57:43,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:43,545 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:57:43,545 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-28 14:57:43,546 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:57:43,546 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 322 [2020-10-28 14:57:43,546 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:57:43,546 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:57:43,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 14:57:43,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:57:43,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-28 14:57:43,547 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:57:43,776 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:57:43,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:57:43,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:43,782 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:57:43,783 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:57:43,783 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:57:43,783 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:57:43,783 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:57:43,784 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:57:43,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:57:43,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:57:43,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:57:43,785 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:57:43,789 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:57:43,790 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [822946181] [2020-10-28 14:57:43,790 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:57:43,790 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 14:57:43,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279822997] [2020-10-28 14:57:43,792 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 14:57:43,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:57:43,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 14:57:43,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-10-28 14:57:43,793 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 13 states. [2020-10-28 14:57:44,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:57:44,365 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2020-10-28 14:57:44,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 14:57:44,366 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 21 [2020-10-28 14:57:44,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:57:44,367 INFO L225 Difference]: With dead ends: 29 [2020-10-28 14:57:44,368 INFO L226 Difference]: Without dead ends: 23 [2020-10-28 14:57:44,369 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2020-10-28 14:57:44,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-10-28 14:57:44,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-10-28 14:57:44,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-28 14:57:44,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2020-10-28 14:57:44,376 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 21 [2020-10-28 14:57:44,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:57:44,376 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2020-10-28 14:57:44,376 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 14:57:44,376 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2020-10-28 14:57:44,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-28 14:57:44,377 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:57:44,377 INFO L422 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:57:44,377 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 14:57:44,378 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:57:44,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:57:44,378 INFO L82 PathProgramCache]: Analyzing trace with hash -109772233, now seen corresponding path program 10 times [2020-10-28 14:57:44,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:57:44,379 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [859428407] [2020-10-28 14:57:44,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:57:44,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:57:44,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:44,768 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:57:44,769 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-28 14:57:44,769 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:57:44,769 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 374 [2020-10-28 14:57:44,769 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:57:44,770 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:57:44,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 14:57:44,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:57:44,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-28 14:57:44,770 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:57:45,019 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:57:45,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:57:45,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:45,026 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:57:45,026 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:57:45,026 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:57:45,027 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:57:45,027 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:57:45,027 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:57:45,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:57:45,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:57:45,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:57:45,028 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:57:45,032 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:57:45,033 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [859428407] [2020-10-28 14:57:45,033 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:57:45,033 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 14:57:45,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563137664] [2020-10-28 14:57:45,034 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 14:57:45,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:57:45,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 14:57:45,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2020-10-28 14:57:45,035 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 14 states. [2020-10-28 14:57:45,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:57:45,727 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2020-10-28 14:57:45,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 14:57:45,728 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 22 [2020-10-28 14:57:45,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:57:45,729 INFO L225 Difference]: With dead ends: 30 [2020-10-28 14:57:45,729 INFO L226 Difference]: Without dead ends: 24 [2020-10-28 14:57:45,730 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=99, Invalid=501, Unknown=0, NotChecked=0, Total=600 [2020-10-28 14:57:45,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-10-28 14:57:45,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-10-28 14:57:45,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-28 14:57:45,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2020-10-28 14:57:45,738 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 22 [2020-10-28 14:57:45,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:57:45,739 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2020-10-28 14:57:45,739 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 14:57:45,739 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2020-10-28 14:57:45,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-28 14:57:45,740 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:57:45,740 INFO L422 BasicCegarLoop]: trace histogram [11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:57:45,740 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 14:57:45,741 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:57:45,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:57:45,741 INFO L82 PathProgramCache]: Analyzing trace with hash 2022316190, now seen corresponding path program 11 times [2020-10-28 14:57:45,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:57:45,742 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [271251895] [2020-10-28 14:57:45,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:57:45,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:57:45,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:46,157 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:57:46,157 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-28 14:57:46,157 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:57:46,157 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 397 [2020-10-28 14:57:46,158 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:57:46,158 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:57:46,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-28 14:57:46,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:57:46,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-28 14:57:46,159 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:57:46,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:57:46,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:57:46,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:46,430 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:57:46,430 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:57:46,430 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:57:46,431 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 14:57:46,431 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:57:46,431 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:57:46,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:57:46,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:57:46,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:57:46,432 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:57:46,436 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:57:46,437 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [271251895] [2020-10-28 14:57:46,437 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:57:46,437 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-28 14:57:46,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629241056] [2020-10-28 14:57:46,438 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-28 14:57:46,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:57:46,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-28 14:57:46,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2020-10-28 14:57:46,439 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 15 states. [2020-10-28 14:57:47,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:57:47,191 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2020-10-28 14:57:47,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-28 14:57:47,192 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 23 [2020-10-28 14:57:47,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:57:47,193 INFO L225 Difference]: With dead ends: 31 [2020-10-28 14:57:47,193 INFO L226 Difference]: Without dead ends: 25 [2020-10-28 14:57:47,195 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=108, Invalid=594, Unknown=0, NotChecked=0, Total=702 [2020-10-28 14:57:47,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-10-28 14:57:47,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-10-28 14:57:47,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-28 14:57:47,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2020-10-28 14:57:47,202 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 23 [2020-10-28 14:57:47,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:57:47,202 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2020-10-28 14:57:47,202 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-28 14:57:47,202 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2020-10-28 14:57:47,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-28 14:57:47,203 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:57:47,203 INFO L422 BasicCegarLoop]: trace histogram [12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:57:47,204 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-28 14:57:47,204 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:57:47,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:57:47,204 INFO L82 PathProgramCache]: Analyzing trace with hash -602419433, now seen corresponding path program 12 times [2020-10-28 14:57:47,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:57:47,205 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [144282134] [2020-10-28 14:57:47,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:57:47,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:57:47,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:47,610 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:57:47,610 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-28 14:57:47,611 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:57:47,611 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 388 [2020-10-28 14:57:47,611 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:57:47,611 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:57:47,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 14:57:47,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:57:47,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-28 14:57:47,612 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:57:47,902 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:57:47,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:57:47,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:47,908 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:57:47,908 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:57:47,909 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:57:47,909 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:57:47,909 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:57:47,909 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:57:47,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:57:47,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:57:47,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:57:47,910 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:57:47,917 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:57:47,918 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [144282134] [2020-10-28 14:57:47,918 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:57:47,918 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-28 14:57:47,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620189830] [2020-10-28 14:57:47,919 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-28 14:57:47,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:57:47,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-28 14:57:47,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2020-10-28 14:57:47,920 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 16 states. [2020-10-28 14:57:48,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:57:48,720 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2020-10-28 14:57:48,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-28 14:57:48,720 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 24 [2020-10-28 14:57:48,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:57:48,721 INFO L225 Difference]: With dead ends: 32 [2020-10-28 14:57:48,721 INFO L226 Difference]: Without dead ends: 26 [2020-10-28 14:57:48,722 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=117, Invalid=695, Unknown=0, NotChecked=0, Total=812 [2020-10-28 14:57:48,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-10-28 14:57:48,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-10-28 14:57:48,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-28 14:57:48,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2020-10-28 14:57:48,729 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 24 [2020-10-28 14:57:48,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:57:48,729 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2020-10-28 14:57:48,729 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-28 14:57:48,729 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2020-10-28 14:57:48,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-28 14:57:48,730 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:57:48,730 INFO L422 BasicCegarLoop]: trace histogram [13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:57:48,730 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-28 14:57:48,730 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:57:48,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:57:48,730 INFO L82 PathProgramCache]: Analyzing trace with hash -364845122, now seen corresponding path program 13 times [2020-10-28 14:57:48,731 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:57:48,731 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [660678031] [2020-10-28 14:57:48,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:57:48,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:57:48,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:49,394 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:57:49,394 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-28 14:57:49,395 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:57:49,395 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 646 [2020-10-28 14:57:49,395 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:57:49,395 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:57:49,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-28 14:57:49,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:57:49,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-28 14:57:49,396 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:57:49,714 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:57:49,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:57:49,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:49,721 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:57:49,721 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:57:49,721 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:57:49,722 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:57:49,722 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:57:49,722 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:57:49,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:57:49,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:57:49,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:57:49,723 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:57:49,731 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:57:49,732 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [660678031] [2020-10-28 14:57:49,732 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:57:49,733 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-28 14:57:49,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659562434] [2020-10-28 14:57:49,734 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-28 14:57:49,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:57:49,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-28 14:57:49,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2020-10-28 14:57:49,736 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 17 states. [2020-10-28 14:57:50,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:57:50,622 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2020-10-28 14:57:50,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-28 14:57:50,622 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 25 [2020-10-28 14:57:50,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:57:50,623 INFO L225 Difference]: With dead ends: 33 [2020-10-28 14:57:50,623 INFO L226 Difference]: Without dead ends: 27 [2020-10-28 14:57:50,624 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=126, Invalid=804, Unknown=0, NotChecked=0, Total=930 [2020-10-28 14:57:50,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-28 14:57:50,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-10-28 14:57:50,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-28 14:57:50,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2020-10-28 14:57:50,632 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 25 [2020-10-28 14:57:50,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:57:50,632 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2020-10-28 14:57:50,632 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-28 14:57:50,632 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2020-10-28 14:57:50,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-28 14:57:50,633 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:57:50,633 INFO L422 BasicCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:57:50,633 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-28 14:57:50,634 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:57:50,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:57:50,634 INFO L82 PathProgramCache]: Analyzing trace with hash -1589976073, now seen corresponding path program 14 times [2020-10-28 14:57:50,634 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:57:50,634 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2083982392] [2020-10-28 14:57:50,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:57:50,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:57:50,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:51,155 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:57:51,156 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-28 14:57:51,156 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:57:51,156 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 505 [2020-10-28 14:57:51,156 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:57:51,156 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:57:51,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-28 14:57:51,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:57:51,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 14:57:51,157 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:57:51,501 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:57:51,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:57:51,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:51,507 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:57:51,508 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:57:51,508 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:57:51,508 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:57:51,508 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:57:51,508 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:57:51,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:57:51,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:57:51,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:57:51,509 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:57:51,513 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:57:51,514 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2083982392] [2020-10-28 14:57:51,514 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:57:51,514 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-28 14:57:51,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314042132] [2020-10-28 14:57:51,515 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-28 14:57:51,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:57:51,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-28 14:57:51,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2020-10-28 14:57:51,516 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 18 states. [2020-10-28 14:57:52,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:57:52,468 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2020-10-28 14:57:52,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-28 14:57:52,470 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 26 [2020-10-28 14:57:52,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:57:52,471 INFO L225 Difference]: With dead ends: 34 [2020-10-28 14:57:52,471 INFO L226 Difference]: Without dead ends: 28 [2020-10-28 14:57:52,472 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=135, Invalid=921, Unknown=0, NotChecked=0, Total=1056 [2020-10-28 14:57:52,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-28 14:57:52,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-10-28 14:57:52,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-28 14:57:52,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2020-10-28 14:57:52,483 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 26 [2020-10-28 14:57:52,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:57:52,483 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2020-10-28 14:57:52,485 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-28 14:57:52,485 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2020-10-28 14:57:52,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-28 14:57:52,488 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:57:52,488 INFO L422 BasicCegarLoop]: trace histogram [15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:57:52,488 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-28 14:57:52,488 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:57:52,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:57:52,489 INFO L82 PathProgramCache]: Analyzing trace with hash -914329890, now seen corresponding path program 15 times [2020-10-28 14:57:52,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:57:52,489 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [482158484] [2020-10-28 14:57:52,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:57:52,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:57:52,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:53,196 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:57:53,197 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-28 14:57:53,197 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:57:53,197 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 683 [2020-10-28 14:57:53,197 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:57:53,198 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:57:53,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-28 14:57:53,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:57:53,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-28 14:57:53,198 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:57:53,585 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:57:53,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:57:53,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:53,593 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:57:53,593 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:57:53,593 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:57:53,593 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:57:53,594 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:57:53,594 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:57:53,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:57:53,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:57:53,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:57:53,594 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:57:53,600 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:57:53,600 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [482158484] [2020-10-28 14:57:53,600 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:57:53,601 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-28 14:57:53,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738109288] [2020-10-28 14:57:53,601 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-28 14:57:53,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:57:53,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-28 14:57:53,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2020-10-28 14:57:53,602 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 19 states. [2020-10-28 14:57:54,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:57:54,624 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2020-10-28 14:57:54,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-28 14:57:54,625 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 27 [2020-10-28 14:57:54,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:57:54,625 INFO L225 Difference]: With dead ends: 35 [2020-10-28 14:57:54,626 INFO L226 Difference]: Without dead ends: 29 [2020-10-28 14:57:54,627 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=144, Invalid=1046, Unknown=0, NotChecked=0, Total=1190 [2020-10-28 14:57:54,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-28 14:57:54,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-10-28 14:57:54,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-28 14:57:54,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2020-10-28 14:57:54,642 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 27 [2020-10-28 14:57:54,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:57:54,643 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2020-10-28 14:57:54,643 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-28 14:57:54,644 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2020-10-28 14:57:54,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-28 14:57:54,645 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:57:54,645 INFO L422 BasicCegarLoop]: trace histogram [16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:57:54,645 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-28 14:57:54,645 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:57:54,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:57:54,646 INFO L82 PathProgramCache]: Analyzing trace with hash -1444134697, now seen corresponding path program 16 times [2020-10-28 14:57:54,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:57:54,647 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [258266309] [2020-10-28 14:57:54,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:57:54,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:57:54,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:55,320 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:57:55,321 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-28 14:57:55,321 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:57:55,321 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 646 [2020-10-28 14:57:55,321 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:57:55,321 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:57:55,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-28 14:57:55,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:57:55,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-28 14:57:55,323 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:57:55,706 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:57:55,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:57:55,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:55,713 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:57:55,713 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:57:55,714 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:57:55,714 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:57:55,714 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:57:55,714 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:57:55,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:57:55,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:57:55,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:57:55,715 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:57:55,719 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:57:55,719 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [258266309] [2020-10-28 14:57:55,720 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:57:55,720 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-28 14:57:55,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052107911] [2020-10-28 14:57:55,720 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-28 14:57:55,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:57:55,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-28 14:57:55,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2020-10-28 14:57:55,722 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 20 states. [2020-10-28 14:57:56,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:57:56,883 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2020-10-28 14:57:56,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-28 14:57:56,884 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 28 [2020-10-28 14:57:56,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:57:56,885 INFO L225 Difference]: With dead ends: 36 [2020-10-28 14:57:56,885 INFO L226 Difference]: Without dead ends: 30 [2020-10-28 14:57:56,887 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=153, Invalid=1179, Unknown=0, NotChecked=0, Total=1332 [2020-10-28 14:57:56,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-28 14:57:56,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-10-28 14:57:56,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-28 14:57:56,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2020-10-28 14:57:56,895 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 28 [2020-10-28 14:57:56,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:57:56,895 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2020-10-28 14:57:56,895 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-28 14:57:56,895 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2020-10-28 14:57:56,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-28 14:57:56,896 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:57:56,896 INFO L422 BasicCegarLoop]: trace histogram [17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:57:56,896 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-28 14:57:56,896 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:57:56,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:57:56,897 INFO L82 PathProgramCache]: Analyzing trace with hash -688214530, now seen corresponding path program 17 times [2020-10-28 14:57:56,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:57:56,897 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2033061702] [2020-10-28 14:57:56,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:57:56,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:57:56,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:57,524 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:57:57,524 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-28 14:57:57,524 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:57:57,525 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 608 [2020-10-28 14:57:57,525 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:57:57,525 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:57:57,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-28 14:57:57,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:57:57,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-28 14:57:57,525 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:57:57,984 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:57:57,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:57:57,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:57,993 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:57:57,993 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:57:57,994 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:57:57,994 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 14:57:57,995 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:57:57,995 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:57:57,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:57:57,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:57:57,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:57:57,995 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:57:58,002 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:57:58,002 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2033061702] [2020-10-28 14:57:58,003 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:57:58,003 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-28 14:57:58,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993753635] [2020-10-28 14:57:58,005 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-28 14:57:58,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:57:58,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-28 14:57:58,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2020-10-28 14:57:58,006 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 21 states. [2020-10-28 14:57:59,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:57:59,146 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2020-10-28 14:57:59,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-28 14:57:59,147 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 29 [2020-10-28 14:57:59,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:57:59,148 INFO L225 Difference]: With dead ends: 37 [2020-10-28 14:57:59,148 INFO L226 Difference]: Without dead ends: 31 [2020-10-28 14:57:59,149 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=162, Invalid=1320, Unknown=0, NotChecked=0, Total=1482 [2020-10-28 14:57:59,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-28 14:57:59,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-10-28 14:57:59,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-28 14:57:59,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2020-10-28 14:57:59,157 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 29 [2020-10-28 14:57:59,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:57:59,157 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2020-10-28 14:57:59,157 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-28 14:57:59,157 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2020-10-28 14:57:59,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-28 14:57:59,158 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:57:59,158 INFO L422 BasicCegarLoop]: trace histogram [18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:57:59,158 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-28 14:57:59,158 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:57:59,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:57:59,159 INFO L82 PathProgramCache]: Analyzing trace with hash 1270474167, now seen corresponding path program 18 times [2020-10-28 14:57:59,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:57:59,159 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [296676075] [2020-10-28 14:57:59,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:57:59,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:57:59,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:59,781 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:57:59,781 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-28 14:57:59,781 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:57:59,781 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 598 [2020-10-28 14:57:59,782 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:57:59,782 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:57:59,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-28 14:57:59,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:57:59,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-28 14:57:59,782 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:58:00,235 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:58:00,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:58:00,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:58:00,243 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:58:00,243 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:58:00,243 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:58:00,243 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:58:00,244 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:58:00,244 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:58:00,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:58:00,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:58:00,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:58:00,244 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:58:00,250 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:58:00,250 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [296676075] [2020-10-28 14:58:00,250 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:58:00,250 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-28 14:58:00,251 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480599378] [2020-10-28 14:58:00,251 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-28 14:58:00,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:58:00,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-28 14:58:00,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2020-10-28 14:58:00,252 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 22 states. [2020-10-28 14:58:01,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:58:01,529 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2020-10-28 14:58:01,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-28 14:58:01,530 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 30 [2020-10-28 14:58:01,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:58:01,531 INFO L225 Difference]: With dead ends: 38 [2020-10-28 14:58:01,531 INFO L226 Difference]: Without dead ends: 32 [2020-10-28 14:58:01,533 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=171, Invalid=1469, Unknown=0, NotChecked=0, Total=1640 [2020-10-28 14:58:01,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-28 14:58:01,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2020-10-28 14:58:01,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-28 14:58:01,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2020-10-28 14:58:01,541 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 30 [2020-10-28 14:58:01,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:58:01,541 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2020-10-28 14:58:01,541 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-28 14:58:01,541 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2020-10-28 14:58:01,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-28 14:58:01,542 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:58:01,542 INFO L422 BasicCegarLoop]: trace histogram [19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:58:01,542 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-28 14:58:01,542 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:58:01,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:58:01,543 INFO L82 PathProgramCache]: Analyzing trace with hash 1860281630, now seen corresponding path program 19 times [2020-10-28 14:58:01,543 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:58:01,545 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [44479846] [2020-10-28 14:58:01,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:58:01,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:58:01,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:58:02,442 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:58:02,443 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-28 14:58:02,443 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:58:02,443 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 878 [2020-10-28 14:58:02,443 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:58:02,443 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:58:02,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-28 14:58:02,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:58:02,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-28 14:58:02,444 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:58:02,949 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:58:02,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:58:02,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:58:02,958 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:58:02,959 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:58:02,959 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:58:02,959 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 14:58:02,959 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:58:02,960 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:58:02,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:58:02,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:58:02,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:58:02,961 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:58:02,970 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:58:02,971 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [44479846] [2020-10-28 14:58:02,973 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:58:02,974 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-28 14:58:02,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913527614] [2020-10-28 14:58:02,977 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-28 14:58:02,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:58:02,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-28 14:58:02,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2020-10-28 14:58:02,979 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 23 states. [2020-10-28 14:58:04,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:58:04,411 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2020-10-28 14:58:04,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-28 14:58:04,412 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 31 [2020-10-28 14:58:04,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:58:04,412 INFO L225 Difference]: With dead ends: 39 [2020-10-28 14:58:04,413 INFO L226 Difference]: Without dead ends: 33 [2020-10-28 14:58:04,414 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=180, Invalid=1626, Unknown=0, NotChecked=0, Total=1806 [2020-10-28 14:58:04,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-28 14:58:04,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-10-28 14:58:04,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-28 14:58:04,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2020-10-28 14:58:04,423 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 31 [2020-10-28 14:58:04,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:58:04,423 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2020-10-28 14:58:04,423 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-28 14:58:04,423 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2020-10-28 14:58:04,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-28 14:58:04,424 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:58:04,424 INFO L422 BasicCegarLoop]: trace histogram [20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:58:04,424 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-28 14:58:04,425 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:58:04,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:58:04,425 INFO L82 PathProgramCache]: Analyzing trace with hash -1330523497, now seen corresponding path program 20 times [2020-10-28 14:58:04,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:58:04,426 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [284967763] [2020-10-28 14:58:04,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:58:04,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:58:04,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:58:05,485 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:58:05,486 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-28 14:58:05,486 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:58:05,486 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1036 [2020-10-28 14:58:05,486 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:58:05,487 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:58:05,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-28 14:58:05,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:58:05,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-28 14:58:05,487 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:58:06,029 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:58:06,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:58:06,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:58:06,037 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:58:06,037 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:58:06,038 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:58:06,038 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:58:06,038 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:58:06,038 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:58:06,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:58:06,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:58:06,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:58:06,039 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:58:06,044 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:58:06,045 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [284967763] [2020-10-28 14:58:06,045 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:58:06,045 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-28 14:58:06,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785905055] [2020-10-28 14:58:06,045 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-28 14:58:06,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:58:06,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-28 14:58:06,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2020-10-28 14:58:06,047 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 24 states. [2020-10-28 14:58:07,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:58:07,529 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2020-10-28 14:58:07,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-28 14:58:07,533 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 32 [2020-10-28 14:58:07,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:58:07,533 INFO L225 Difference]: With dead ends: 40 [2020-10-28 14:58:07,533 INFO L226 Difference]: Without dead ends: 34 [2020-10-28 14:58:07,535 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=189, Invalid=1791, Unknown=0, NotChecked=0, Total=1980 [2020-10-28 14:58:07,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-28 14:58:07,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2020-10-28 14:58:07,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-28 14:58:07,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2020-10-28 14:58:07,542 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 32 [2020-10-28 14:58:07,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:58:07,542 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2020-10-28 14:58:07,542 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-28 14:58:07,542 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2020-10-28 14:58:07,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-28 14:58:07,543 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:58:07,543 INFO L422 BasicCegarLoop]: trace histogram [21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:58:07,543 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-28 14:58:07,543 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:58:07,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:58:07,544 INFO L82 PathProgramCache]: Analyzing trace with hash -1461234626, now seen corresponding path program 21 times [2020-10-28 14:58:07,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:58:07,544 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [650051092] [2020-10-28 14:58:07,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:58:07,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:58:07,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:58:08,607 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:58:08,607 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-28 14:58:08,608 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:58:08,608 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1043 [2020-10-28 14:58:08,608 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:58:08,608 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:58:08,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-28 14:58:08,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:58:08,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-28 14:58:08,609 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:58:09,162 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:58:09,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:58:09,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:58:09,169 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:58:09,169 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:58:09,169 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:58:09,169 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:58:09,170 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:58:09,170 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:58:09,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:58:09,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:58:09,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:58:09,170 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:58:09,175 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:58:09,175 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [650051092] [2020-10-28 14:58:09,176 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:58:09,176 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-28 14:58:09,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630700414] [2020-10-28 14:58:09,176 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-28 14:58:09,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:58:09,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-28 14:58:09,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2020-10-28 14:58:09,178 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 25 states. [2020-10-28 14:58:10,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:58:10,873 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2020-10-28 14:58:10,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-28 14:58:10,873 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 33 [2020-10-28 14:58:10,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:58:10,874 INFO L225 Difference]: With dead ends: 41 [2020-10-28 14:58:10,874 INFO L226 Difference]: Without dead ends: 35 [2020-10-28 14:58:10,876 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=198, Invalid=1964, Unknown=0, NotChecked=0, Total=2162 [2020-10-28 14:58:10,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-28 14:58:10,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2020-10-28 14:58:10,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-28 14:58:10,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2020-10-28 14:58:10,883 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 33 [2020-10-28 14:58:10,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:58:10,884 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2020-10-28 14:58:10,884 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-28 14:58:10,884 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2020-10-28 14:58:10,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-28 14:58:10,885 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:58:10,885 INFO L422 BasicCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:58:10,885 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-28 14:58:10,885 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:58:10,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:58:10,885 INFO L82 PathProgramCache]: Analyzing trace with hash -1218312329, now seen corresponding path program 22 times [2020-10-28 14:58:10,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:58:10,886 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [620738507] [2020-10-28 14:58:10,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:58:10,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:58:10,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:58:11,987 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:58:11,988 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-28 14:58:11,988 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:58:11,988 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1074 [2020-10-28 14:58:11,988 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:58:11,989 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:58:11,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-28 14:58:11,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:58:11,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-28 14:58:11,989 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:58:12,622 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:58:12,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:58:12,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:58:12,628 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:58:12,628 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:58:12,628 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:58:12,629 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:58:12,629 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:58:12,629 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:58:12,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:58:12,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:58:12,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:58:12,630 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:58:12,634 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:58:12,635 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [620738507] [2020-10-28 14:58:12,635 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:58:12,635 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-28 14:58:12,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352441611] [2020-10-28 14:58:12,636 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-28 14:58:12,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:58:12,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-28 14:58:12,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=579, Unknown=0, NotChecked=0, Total=650 [2020-10-28 14:58:12,637 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 26 states. [2020-10-28 14:58:14,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:58:14,337 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2020-10-28 14:58:14,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-28 14:58:14,338 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 34 [2020-10-28 14:58:14,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:58:14,338 INFO L225 Difference]: With dead ends: 42 [2020-10-28 14:58:14,338 INFO L226 Difference]: Without dead ends: 36 [2020-10-28 14:58:14,339 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=207, Invalid=2145, Unknown=0, NotChecked=0, Total=2352 [2020-10-28 14:58:14,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-28 14:58:14,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-10-28 14:58:14,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-28 14:58:14,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2020-10-28 14:58:14,347 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 34 [2020-10-28 14:58:14,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:58:14,347 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2020-10-28 14:58:14,347 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-28 14:58:14,348 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2020-10-28 14:58:14,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-28 14:58:14,348 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:58:14,348 INFO L422 BasicCegarLoop]: trace histogram [23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:58:14,348 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-28 14:58:14,349 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:58:14,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:58:14,349 INFO L82 PathProgramCache]: Analyzing trace with hash 2017311582, now seen corresponding path program 23 times [2020-10-28 14:58:14,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:58:14,349 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [840161753] [2020-10-28 14:58:14,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:58:14,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:58:14,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:58:15,555 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:58:15,555 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-28 14:58:15,556 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:58:15,556 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1185 [2020-10-28 14:58:15,557 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:58:15,557 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:58:15,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-28 14:58:15,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:58:15,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-28 14:58:15,557 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:58:16,254 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:58:16,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:58:16,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:58:16,261 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:58:16,262 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:58:16,262 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:58:16,262 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:58:16,262 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:58:16,262 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:58:16,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:58:16,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:58:16,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:58:16,262 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:58:16,267 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:58:16,267 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [840161753] [2020-10-28 14:58:16,267 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:58:16,267 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-28 14:58:16,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843945653] [2020-10-28 14:58:16,268 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-28 14:58:16,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:58:16,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-28 14:58:16,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=628, Unknown=0, NotChecked=0, Total=702 [2020-10-28 14:58:16,269 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 27 states. [2020-10-28 14:58:18,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:58:18,185 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2020-10-28 14:58:18,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-28 14:58:18,185 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 35 [2020-10-28 14:58:18,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:58:18,186 INFO L225 Difference]: With dead ends: 43 [2020-10-28 14:58:18,186 INFO L226 Difference]: Without dead ends: 37 [2020-10-28 14:58:18,188 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=216, Invalid=2334, Unknown=0, NotChecked=0, Total=2550 [2020-10-28 14:58:18,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-28 14:58:18,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-10-28 14:58:18,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-28 14:58:18,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2020-10-28 14:58:18,193 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 35 [2020-10-28 14:58:18,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:58:18,193 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2020-10-28 14:58:18,194 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-28 14:58:18,194 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2020-10-28 14:58:18,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-28 14:58:18,194 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:58:18,194 INFO L422 BasicCegarLoop]: trace histogram [24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:58:18,195 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-28 14:58:18,195 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:58:18,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:58:18,195 INFO L82 PathProgramCache]: Analyzing trace with hash -757562281, now seen corresponding path program 24 times [2020-10-28 14:58:18,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:58:18,195 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2109706793] [2020-10-28 14:58:18,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:58:18,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:58:18,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:58:19,569 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:58:19,569 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-28 14:58:19,569 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:58:19,569 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1352 [2020-10-28 14:58:19,569 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:58:19,569 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:58:19,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-28 14:58:19,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:58:19,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-28 14:58:19,570 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:58:20,282 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:58:20,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:58:20,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:58:20,288 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:58:20,288 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:58:20,288 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:58:20,288 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:58:20,288 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:58:20,288 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:58:20,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:58:20,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:58:20,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:58:20,289 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:58:20,293 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:58:20,293 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2109706793] [2020-10-28 14:58:20,293 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:58:20,293 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-28 14:58:20,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543124498] [2020-10-28 14:58:20,294 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-28 14:58:20,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:58:20,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-28 14:58:20,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=679, Unknown=0, NotChecked=0, Total=756 [2020-10-28 14:58:20,295 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 28 states. [2020-10-28 14:58:22,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:58:22,287 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2020-10-28 14:58:22,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-28 14:58:22,287 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 36 [2020-10-28 14:58:22,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:58:22,288 INFO L225 Difference]: With dead ends: 44 [2020-10-28 14:58:22,288 INFO L226 Difference]: Without dead ends: 38 [2020-10-28 14:58:22,289 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=225, Invalid=2531, Unknown=0, NotChecked=0, Total=2756 [2020-10-28 14:58:22,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-28 14:58:22,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2020-10-28 14:58:22,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-28 14:58:22,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2020-10-28 14:58:22,296 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 36 [2020-10-28 14:58:22,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:58:22,297 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2020-10-28 14:58:22,297 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-28 14:58:22,297 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2020-10-28 14:58:22,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-28 14:58:22,297 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:58:22,298 INFO L422 BasicCegarLoop]: trace histogram [25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:58:22,298 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-28 14:58:22,298 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:58:22,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:58:22,299 INFO L82 PathProgramCache]: Analyzing trace with hash -879306114, now seen corresponding path program 25 times [2020-10-28 14:58:22,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:58:22,299 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [122882407] [2020-10-28 14:58:22,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:58:22,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:58:22,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:58:23,407 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:58:23,407 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-28 14:58:23,407 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:58:23,408 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1086 [2020-10-28 14:58:23,408 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:58:23,408 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:58:23,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-28 14:58:23,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:58:23,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-28 14:58:23,409 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:58:24,140 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:58:24,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:58:24,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:58:24,147 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:58:24,147 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:58:24,148 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:58:24,148 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:58:24,148 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:58:24,148 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:58:24,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:58:24,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:58:24,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:58:24,149 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:58:24,154 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:58:24,155 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [122882407] [2020-10-28 14:58:24,155 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:58:24,155 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-28 14:58:24,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795279081] [2020-10-28 14:58:24,155 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-28 14:58:24,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:58:24,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-28 14:58:24,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=732, Unknown=0, NotChecked=0, Total=812 [2020-10-28 14:58:24,157 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 29 states. [2020-10-28 14:58:26,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:58:26,220 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2020-10-28 14:58:26,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-28 14:58:26,222 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 37 [2020-10-28 14:58:26,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:58:26,223 INFO L225 Difference]: With dead ends: 45 [2020-10-28 14:58:26,223 INFO L226 Difference]: Without dead ends: 39 [2020-10-28 14:58:26,224 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=234, Invalid=2736, Unknown=0, NotChecked=0, Total=2970 [2020-10-28 14:58:26,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-28 14:58:26,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-10-28 14:58:26,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-28 14:58:26,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2020-10-28 14:58:26,232 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 37 [2020-10-28 14:58:26,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:58:26,232 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2020-10-28 14:58:26,232 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-28 14:58:26,232 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2020-10-28 14:58:26,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-28 14:58:26,232 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:58:26,233 INFO L422 BasicCegarLoop]: trace histogram [26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:58:26,233 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-28 14:58:26,233 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:58:26,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:58:26,233 INFO L82 PathProgramCache]: Analyzing trace with hash -358397641, now seen corresponding path program 26 times [2020-10-28 14:58:26,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:58:26,234 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [94346187] [2020-10-28 14:58:26,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:58:26,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:58:26,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:58:27,642 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:58:27,643 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-28 14:58:27,643 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:58:27,643 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1386 [2020-10-28 14:58:27,643 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:58:27,643 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:58:27,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-28 14:58:27,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:58:27,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-28 14:58:27,644 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:58:28,454 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:58:28,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:58:28,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:58:28,460 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:58:28,461 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:58:28,461 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:58:28,461 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:58:28,461 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:58:28,461 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:58:28,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:58:28,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:58:28,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:58:28,462 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:58:28,466 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:58:28,467 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [94346187] [2020-10-28 14:58:28,467 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:58:28,467 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-28 14:58:28,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603990968] [2020-10-28 14:58:28,467 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-28 14:58:28,467 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:58:28,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-28 14:58:28,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=787, Unknown=0, NotChecked=0, Total=870 [2020-10-28 14:58:28,469 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 30 states. [2020-10-28 14:58:30,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:58:30,653 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2020-10-28 14:58:30,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-28 14:58:30,654 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 38 [2020-10-28 14:58:30,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:58:30,654 INFO L225 Difference]: With dead ends: 46 [2020-10-28 14:58:30,655 INFO L226 Difference]: Without dead ends: 40 [2020-10-28 14:58:30,656 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=243, Invalid=2949, Unknown=0, NotChecked=0, Total=3192 [2020-10-28 14:58:30,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-28 14:58:30,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2020-10-28 14:58:30,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-28 14:58:30,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2020-10-28 14:58:30,664 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 38 [2020-10-28 14:58:30,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:58:30,664 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2020-10-28 14:58:30,664 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-28 14:58:30,664 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2020-10-28 14:58:30,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-28 14:58:30,665 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:58:30,665 INFO L422 BasicCegarLoop]: trace histogram [27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:58:30,665 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-28 14:58:30,665 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:58:30,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:58:30,666 INFO L82 PathProgramCache]: Analyzing trace with hash -1390104162, now seen corresponding path program 27 times [2020-10-28 14:58:30,666 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:58:30,666 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [399684118] [2020-10-28 14:58:30,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:58:30,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:58:30,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:58:32,186 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:58:32,187 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-28 14:58:32,187 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:58:32,187 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1499 [2020-10-28 14:58:32,187 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:58:32,187 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:58:32,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-28 14:58:32,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:58:32,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-28 14:58:32,188 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:58:33,107 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:58:33,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:58:33,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:58:33,112 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:58:33,112 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:58:33,112 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:58:33,112 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:58:33,113 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:58:33,113 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:58:33,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:58:33,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:58:33,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:58:33,113 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:58:33,118 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:58:33,119 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [399684118] [2020-10-28 14:58:33,119 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:58:33,119 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-28 14:58:33,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688511343] [2020-10-28 14:58:33,119 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-28 14:58:33,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:58:33,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-28 14:58:33,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=844, Unknown=0, NotChecked=0, Total=930 [2020-10-28 14:58:33,121 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand 31 states. [2020-10-28 14:58:35,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:58:35,533 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2020-10-28 14:58:35,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-28 14:58:35,539 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 39 [2020-10-28 14:58:35,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:58:35,540 INFO L225 Difference]: With dead ends: 47 [2020-10-28 14:58:35,540 INFO L226 Difference]: Without dead ends: 41 [2020-10-28 14:58:35,542 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=252, Invalid=3170, Unknown=0, NotChecked=0, Total=3422 [2020-10-28 14:58:35,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-28 14:58:35,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2020-10-28 14:58:35,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-28 14:58:35,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2020-10-28 14:58:35,549 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 39 [2020-10-28 14:58:35,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:58:35,549 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2020-10-28 14:58:35,549 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-28 14:58:35,549 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2020-10-28 14:58:35,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-28 14:58:35,550 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:58:35,550 INFO L422 BasicCegarLoop]: trace histogram [28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:58:35,550 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-28 14:58:35,550 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:58:35,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:58:35,551 INFO L82 PathProgramCache]: Analyzing trace with hash 986732055, now seen corresponding path program 28 times [2020-10-28 14:58:35,551 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:58:35,551 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [384929580] [2020-10-28 14:58:35,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:58:35,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:58:35,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:58:37,216 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:58:37,216 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-28 14:58:37,217 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:58:37,217 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1640 [2020-10-28 14:58:37,217 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:58:37,217 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:58:37,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-28 14:58:37,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:58:37,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-28 14:58:37,218 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:58:38,100 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:58:38,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:58:38,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:58:38,105 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:58:38,106 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:58:38,106 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:58:38,106 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:58:38,106 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:58:38,106 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:58:38,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:58:38,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:58:38,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:58:38,106 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:58:38,111 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:58:38,111 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [384929580] [2020-10-28 14:58:38,111 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:58:38,111 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-28 14:58:38,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091679106] [2020-10-28 14:58:38,112 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-28 14:58:38,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:58:38,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-28 14:58:38,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=903, Unknown=0, NotChecked=0, Total=992 [2020-10-28 14:58:38,113 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 32 states. [2020-10-28 14:58:40,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:58:40,617 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2020-10-28 14:58:40,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-28 14:58:40,618 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 40 [2020-10-28 14:58:40,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:58:40,619 INFO L225 Difference]: With dead ends: 48 [2020-10-28 14:58:40,619 INFO L226 Difference]: Without dead ends: 42 [2020-10-28 14:58:40,621 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=261, Invalid=3399, Unknown=0, NotChecked=0, Total=3660 [2020-10-28 14:58:40,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-28 14:58:40,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-10-28 14:58:40,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-28 14:58:40,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2020-10-28 14:58:40,627 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 40 [2020-10-28 14:58:40,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:58:40,627 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2020-10-28 14:58:40,627 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-28 14:58:40,628 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2020-10-28 14:58:40,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-28 14:58:40,628 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:58:40,628 INFO L422 BasicCegarLoop]: trace histogram [29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:58:40,628 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-28 14:58:40,628 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:58:40,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:58:40,629 INFO L82 PathProgramCache]: Analyzing trace with hash 1654210750, now seen corresponding path program 29 times [2020-10-28 14:58:40,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:58:40,629 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [965016256] [2020-10-28 14:58:40,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:58:40,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:58:40,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:58:42,075 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:58:42,076 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-28 14:58:42,076 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:58:42,076 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1426 [2020-10-28 14:58:42,076 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:58:42,076 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:58:42,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-28 14:58:42,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:58:42,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-28 14:58:42,077 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:58:43,055 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:58:43,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:58:43,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:58:43,061 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:58:43,061 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:58:43,061 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:58:43,061 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:58:43,061 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:58:43,061 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:58:43,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:58:43,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:58:43,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:58:43,063 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:58:43,068 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:58:43,069 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [965016256] [2020-10-28 14:58:43,069 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:58:43,069 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-28 14:58:43,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520455641] [2020-10-28 14:58:43,069 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-28 14:58:43,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:58:43,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-28 14:58:43,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=964, Unknown=0, NotChecked=0, Total=1056 [2020-10-28 14:58:43,071 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 33 states. [2020-10-28 14:58:45,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:58:45,708 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2020-10-28 14:58:45,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-28 14:58:45,709 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 41 [2020-10-28 14:58:45,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:58:45,710 INFO L225 Difference]: With dead ends: 49 [2020-10-28 14:58:45,710 INFO L226 Difference]: Without dead ends: 43 [2020-10-28 14:58:45,712 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 436 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=270, Invalid=3636, Unknown=0, NotChecked=0, Total=3906 [2020-10-28 14:58:45,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-28 14:58:45,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2020-10-28 14:58:45,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-28 14:58:45,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2020-10-28 14:58:45,717 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 41 [2020-10-28 14:58:45,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:58:45,718 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2020-10-28 14:58:45,718 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-28 14:58:45,718 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2020-10-28 14:58:45,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-28 14:58:45,718 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:58:45,718 INFO L422 BasicCegarLoop]: trace histogram [30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:58:45,718 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-28 14:58:45,719 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:58:45,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:58:45,719 INFO L82 PathProgramCache]: Analyzing trace with hash 871213815, now seen corresponding path program 30 times [2020-10-28 14:58:45,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:58:45,719 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1319344374] [2020-10-28 14:58:45,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:58:45,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:58:45,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:58:47,133 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:58:47,133 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-28 14:58:47,133 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:58:47,134 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1394 [2020-10-28 14:58:47,134 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:58:47,134 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:58:47,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-28 14:58:47,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:58:47,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-28 14:58:47,134 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:58:48,154 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:58:48,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:58:48,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:58:48,160 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:58:48,160 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:58:48,160 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:58:48,160 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:58:48,160 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:58:48,160 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:58:48,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:58:48,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:58:48,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:58:48,161 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:58:48,166 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:58:48,166 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1319344374] [2020-10-28 14:58:48,166 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:58:48,167 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-28 14:58:48,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150384590] [2020-10-28 14:58:48,167 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-28 14:58:48,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:58:48,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-28 14:58:48,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=1027, Unknown=0, NotChecked=0, Total=1122 [2020-10-28 14:58:48,168 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 34 states. [2020-10-28 14:58:50,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:58:50,976 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2020-10-28 14:58:50,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-28 14:58:50,977 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 42 [2020-10-28 14:58:50,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:58:50,978 INFO L225 Difference]: With dead ends: 50 [2020-10-28 14:58:50,978 INFO L226 Difference]: Without dead ends: 44 [2020-10-28 14:58:50,980 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 466 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=279, Invalid=3881, Unknown=0, NotChecked=0, Total=4160 [2020-10-28 14:58:50,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-28 14:58:50,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2020-10-28 14:58:50,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-28 14:58:50,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2020-10-28 14:58:50,986 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 42 [2020-10-28 14:58:50,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:58:50,986 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2020-10-28 14:58:50,986 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-28 14:58:50,987 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2020-10-28 14:58:50,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-28 14:58:50,987 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:58:50,987 INFO L422 BasicCegarLoop]: trace histogram [31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:58:50,987 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-28 14:58:50,987 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:58:50,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:58:50,988 INFO L82 PathProgramCache]: Analyzing trace with hash -1926854690, now seen corresponding path program 31 times [2020-10-28 14:58:50,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:58:50,988 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1856298053] [2020-10-28 14:58:50,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:58:51,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:58:51,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:58:52,715 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:58:52,715 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-28 14:58:52,715 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:58:52,715 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1702 [2020-10-28 14:58:52,715 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:58:52,715 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:58:52,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-28 14:58:52,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:58:52,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-28 14:58:52,716 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:58:53,742 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:58:53,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:58:53,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:58:53,748 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:58:53,748 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:58:53,748 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:58:53,748 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:58:53,749 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:58:53,749 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:58:53,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:58:53,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:58:53,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:58:53,750 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:58:53,757 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:58:53,757 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1856298053] [2020-10-28 14:58:53,758 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:58:53,758 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-28 14:58:53,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703987543] [2020-10-28 14:58:53,758 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-28 14:58:53,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:58:53,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-28 14:58:53,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=1092, Unknown=0, NotChecked=0, Total=1190 [2020-10-28 14:58:53,760 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 35 states. [2020-10-28 14:58:56,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:58:56,786 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2020-10-28 14:58:56,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-28 14:58:56,787 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 43 [2020-10-28 14:58:56,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:58:56,788 INFO L225 Difference]: With dead ends: 51 [2020-10-28 14:58:56,788 INFO L226 Difference]: Without dead ends: 45 [2020-10-28 14:58:56,791 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 497 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=288, Invalid=4134, Unknown=0, NotChecked=0, Total=4422 [2020-10-28 14:58:56,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-28 14:58:56,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-10-28 14:58:56,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-28 14:58:56,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2020-10-28 14:58:56,798 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 43 [2020-10-28 14:58:56,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:58:56,798 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2020-10-28 14:58:56,798 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-28 14:58:56,798 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2020-10-28 14:58:56,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-28 14:58:56,799 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:58:56,799 INFO L422 BasicCegarLoop]: trace histogram [32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:58:56,799 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-28 14:58:56,799 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:58:56,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:58:56,800 INFO L82 PathProgramCache]: Analyzing trace with hash 1527334871, now seen corresponding path program 32 times [2020-10-28 14:58:56,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:58:56,800 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [718863067] [2020-10-28 14:58:56,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:58:56,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:58:56,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:58:58,460 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:58:58,461 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-28 14:58:58,461 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:58:58,461 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1631 [2020-10-28 14:58:58,461 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:58:58,461 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:58:58,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-28 14:58:58,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:58:58,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-28 14:58:58,461 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:58:59,685 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:58:59,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:58:59,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:58:59,691 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:58:59,691 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:58:59,691 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:58:59,691 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:58:59,691 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:58:59,692 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:58:59,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:58:59,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:58:59,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:58:59,692 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:58:59,697 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:58:59,697 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [718863067] [2020-10-28 14:58:59,697 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:58:59,697 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-28 14:58:59,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078294102] [2020-10-28 14:58:59,698 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-28 14:58:59,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:58:59,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-28 14:58:59,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=1159, Unknown=0, NotChecked=0, Total=1260 [2020-10-28 14:58:59,699 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 36 states. [2020-10-28 14:59:02,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:59:02,821 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2020-10-28 14:59:02,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-28 14:59:02,822 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 44 [2020-10-28 14:59:02,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:59:02,823 INFO L225 Difference]: With dead ends: 52 [2020-10-28 14:59:02,823 INFO L226 Difference]: Without dead ends: 46 [2020-10-28 14:59:02,824 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 529 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=297, Invalid=4395, Unknown=0, NotChecked=0, Total=4692 [2020-10-28 14:59:02,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-28 14:59:02,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2020-10-28 14:59:02,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-28 14:59:02,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2020-10-28 14:59:02,831 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 44 [2020-10-28 14:59:02,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:59:02,831 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2020-10-28 14:59:02,832 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-28 14:59:02,832 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2020-10-28 14:59:02,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-28 14:59:02,832 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:59:02,832 INFO L422 BasicCegarLoop]: trace histogram [33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:59:02,832 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-28 14:59:02,833 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:59:02,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:59:02,833 INFO L82 PathProgramCache]: Analyzing trace with hash 1233028862, now seen corresponding path program 33 times [2020-10-28 14:59:02,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:59:02,834 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [276509345] [2020-10-28 14:59:02,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:59:02,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:59:02,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:59:04,819 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:59:04,820 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-28 14:59:04,820 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:59:04,820 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1956 [2020-10-28 14:59:04,820 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:59:04,820 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:59:04,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-28 14:59:04,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:59:04,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-28 14:59:04,821 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:59:06,036 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:59:06,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:59:06,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:59:06,042 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:59:06,042 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:59:06,042 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:59:06,043 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:59:06,043 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:59:06,043 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:59:06,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:59:06,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:59:06,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:59:06,043 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:59:06,048 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:59:06,049 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [276509345] [2020-10-28 14:59:06,049 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:59:06,049 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-28 14:59:06,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018400051] [2020-10-28 14:59:06,049 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-28 14:59:06,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:59:06,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-28 14:59:06,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1228, Unknown=0, NotChecked=0, Total=1332 [2020-10-28 14:59:06,050 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand 37 states. [2020-10-28 14:59:09,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:59:09,394 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2020-10-28 14:59:09,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-28 14:59:09,395 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 45 [2020-10-28 14:59:09,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:59:09,396 INFO L225 Difference]: With dead ends: 53 [2020-10-28 14:59:09,396 INFO L226 Difference]: Without dead ends: 47 [2020-10-28 14:59:09,397 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 562 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=306, Invalid=4664, Unknown=0, NotChecked=0, Total=4970 [2020-10-28 14:59:09,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-28 14:59:09,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2020-10-28 14:59:09,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-28 14:59:09,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2020-10-28 14:59:09,402 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 45 [2020-10-28 14:59:09,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:59:09,402 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2020-10-28 14:59:09,402 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-28 14:59:09,402 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2020-10-28 14:59:09,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-28 14:59:09,403 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:59:09,403 INFO L422 BasicCegarLoop]: trace histogram [34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:59:09,403 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-28 14:59:09,403 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:59:09,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:59:09,403 INFO L82 PathProgramCache]: Analyzing trace with hash 699477175, now seen corresponding path program 34 times [2020-10-28 14:59:09,404 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:59:09,404 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [650572122] [2020-10-28 14:59:09,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:59:09,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:59:09,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:59:11,588 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:59:11,588 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-28 14:59:11,588 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:59:11,588 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2160 [2020-10-28 14:59:11,589 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:59:11,589 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:59:11,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-28 14:59:11,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:59:11,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-28 14:59:11,589 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:59:12,880 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:59:12,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:59:12,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:59:12,886 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:59:12,886 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:59:12,886 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:59:12,886 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:59:12,886 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:59:12,887 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:59:12,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:59:12,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:59:12,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:59:12,887 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:59:12,905 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:59:12,905 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [650572122] [2020-10-28 14:59:12,905 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:59:12,905 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-28 14:59:12,906 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312336292] [2020-10-28 14:59:12,906 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-28 14:59:12,906 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:59:12,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-28 14:59:12,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1299, Unknown=0, NotChecked=0, Total=1406 [2020-10-28 14:59:12,907 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 38 states. [2020-10-28 14:59:16,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:59:16,252 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2020-10-28 14:59:16,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-28 14:59:16,252 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 46 [2020-10-28 14:59:16,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:59:16,253 INFO L225 Difference]: With dead ends: 54 [2020-10-28 14:59:16,253 INFO L226 Difference]: Without dead ends: 48 [2020-10-28 14:59:16,254 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 596 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=315, Invalid=4941, Unknown=0, NotChecked=0, Total=5256 [2020-10-28 14:59:16,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-28 14:59:16,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-10-28 14:59:16,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-28 14:59:16,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2020-10-28 14:59:16,261 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 46 [2020-10-28 14:59:16,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:59:16,261 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2020-10-28 14:59:16,261 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-28 14:59:16,261 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2020-10-28 14:59:16,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-28 14:59:16,262 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:59:16,262 INFO L422 BasicCegarLoop]: trace histogram [35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:59:16,262 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-28 14:59:16,262 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:59:16,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:59:16,263 INFO L82 PathProgramCache]: Analyzing trace with hash 1339244062, now seen corresponding path program 35 times [2020-10-28 14:59:16,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:59:16,263 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1918959602] [2020-10-28 14:59:16,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:59:16,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:59:16,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:59:18,947 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:59:18,947 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-28 14:59:18,947 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:59:18,948 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2661 [2020-10-28 14:59:18,948 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:59:18,948 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:59:18,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-28 14:59:18,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:59:18,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-28 14:59:18,948 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:59:20,311 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:59:20,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:59:20,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:59:20,317 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:59:20,317 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:59:20,317 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:59:20,317 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:59:20,317 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:59:20,318 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:59:20,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:59:20,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:59:20,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:59:20,318 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:59:20,324 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:59:20,324 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1918959602] [2020-10-28 14:59:20,324 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:59:20,325 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-28 14:59:20,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879791074] [2020-10-28 14:59:20,325 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-28 14:59:20,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:59:20,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-28 14:59:20,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1372, Unknown=0, NotChecked=0, Total=1482 [2020-10-28 14:59:20,326 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 39 states. [2020-10-28 14:59:24,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:59:24,222 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2020-10-28 14:59:24,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-28 14:59:24,223 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 47 [2020-10-28 14:59:24,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:59:24,224 INFO L225 Difference]: With dead ends: 55 [2020-10-28 14:59:24,224 INFO L226 Difference]: Without dead ends: 49 [2020-10-28 14:59:24,226 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 631 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=324, Invalid=5226, Unknown=0, NotChecked=0, Total=5550 [2020-10-28 14:59:24,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-28 14:59:24,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2020-10-28 14:59:24,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-28 14:59:24,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2020-10-28 14:59:24,232 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 47 [2020-10-28 14:59:24,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:59:24,232 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2020-10-28 14:59:24,232 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-28 14:59:24,232 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2020-10-28 14:59:24,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-28 14:59:24,233 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:59:24,233 INFO L422 BasicCegarLoop]: trace histogram [36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:59:24,233 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-28 14:59:24,233 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:59:24,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:59:24,234 INFO L82 PathProgramCache]: Analyzing trace with hash -302818921, now seen corresponding path program 36 times [2020-10-28 14:59:24,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:59:24,234 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2087532069] [2020-10-28 14:59:24,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:59:24,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:59:24,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:59:27,153 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:59:27,154 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-28 14:59:27,154 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:59:27,154 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2896 [2020-10-28 14:59:27,154 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:59:27,154 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:59:27,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-28 14:59:27,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:59:27,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-28 14:59:27,154 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:59:28,666 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:59:28,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:59:28,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:59:28,671 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:59:28,672 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:59:28,672 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:59:28,672 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:59:28,672 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:59:28,672 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:59:28,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:59:28,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:59:28,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:59:28,673 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:59:28,678 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:59:28,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2087532069] [2020-10-28 14:59:28,679 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:59:28,679 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-28 14:59:28,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876425668] [2020-10-28 14:59:28,679 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-28 14:59:28,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:59:28,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-28 14:59:28,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1447, Unknown=0, NotChecked=0, Total=1560 [2020-10-28 14:59:28,681 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 40 states. [2020-10-28 14:59:32,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:59:32,811 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2020-10-28 14:59:32,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-28 14:59:32,812 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 48 [2020-10-28 14:59:32,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:59:32,813 INFO L225 Difference]: With dead ends: 56 [2020-10-28 14:59:32,813 INFO L226 Difference]: Without dead ends: 50 [2020-10-28 14:59:32,814 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 667 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=333, Invalid=5519, Unknown=0, NotChecked=0, Total=5852 [2020-10-28 14:59:32,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-28 14:59:32,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2020-10-28 14:59:32,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-28 14:59:32,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2020-10-28 14:59:32,819 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 48 [2020-10-28 14:59:32,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:59:32,819 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2020-10-28 14:59:32,820 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-28 14:59:32,820 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2020-10-28 14:59:32,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-28 14:59:32,820 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:59:32,820 INFO L422 BasicCegarLoop]: trace histogram [37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:59:32,821 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-28 14:59:32,821 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:59:32,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:59:32,821 INFO L82 PathProgramCache]: Analyzing trace with hash 332836158, now seen corresponding path program 37 times [2020-10-28 14:59:32,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:59:32,822 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1981638159] [2020-10-28 14:59:32,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:59:32,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:59:32,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:59:35,119 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:59:35,120 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-28 14:59:35,120 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:59:35,120 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2270 [2020-10-28 14:59:35,120 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:59:35,120 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:59:35,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-28 14:59:35,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:59:35,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-28 14:59:35,120 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:59:36,658 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:59:36,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:59:36,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:59:36,664 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:59:36,664 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:59:36,664 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:59:36,664 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:59:36,664 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:59:36,664 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:59:36,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:59:36,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:59:36,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:59:36,665 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:59:36,670 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:59:36,670 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1981638159] [2020-10-28 14:59:36,670 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:59:36,671 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-28 14:59:36,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175834734] [2020-10-28 14:59:36,671 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-28 14:59:36,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:59:36,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-28 14:59:36,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1524, Unknown=0, NotChecked=0, Total=1640 [2020-10-28 14:59:36,672 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand 41 states. [2020-10-28 14:59:40,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:59:40,964 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2020-10-28 14:59:40,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-28 14:59:40,964 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 49 [2020-10-28 14:59:40,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:59:40,966 INFO L225 Difference]: With dead ends: 57 [2020-10-28 14:59:40,966 INFO L226 Difference]: Without dead ends: 51 [2020-10-28 14:59:40,967 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 704 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=342, Invalid=5820, Unknown=0, NotChecked=0, Total=6162 [2020-10-28 14:59:40,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-28 14:59:40,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-10-28 14:59:40,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-28 14:59:40,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2020-10-28 14:59:40,975 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 49 [2020-10-28 14:59:40,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:59:40,975 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2020-10-28 14:59:40,975 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-28 14:59:40,975 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2020-10-28 14:59:40,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-28 14:59:40,976 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:59:40,976 INFO L422 BasicCegarLoop]: trace histogram [38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:59:40,976 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-28 14:59:40,976 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:59:40,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:59:40,976 INFO L82 PathProgramCache]: Analyzing trace with hash -1436692873, now seen corresponding path program 38 times [2020-10-28 14:59:40,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:59:40,977 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1410173917] [2020-10-28 14:59:40,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:59:41,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:59:41,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:59:43,461 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:59:43,461 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-28 14:59:43,461 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:59:43,461 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2447 [2020-10-28 14:59:43,461 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:59:43,462 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:59:43,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-28 14:59:43,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:59:43,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-28 14:59:43,462 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:59:45,127 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:59:45,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:59:45,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:59:45,132 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:59:45,133 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:59:45,133 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:59:45,133 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:59:45,133 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:59:45,133 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:59:45,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:59:45,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:59:45,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:59:45,134 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:59:45,140 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:59:45,141 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1410173917] [2020-10-28 14:59:45,141 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:59:45,141 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-10-28 14:59:45,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265390875] [2020-10-28 14:59:45,141 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-28 14:59:45,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:59:45,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-28 14:59:45,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1603, Unknown=0, NotChecked=0, Total=1722 [2020-10-28 14:59:45,142 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 42 states. [2020-10-28 14:59:49,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:59:49,633 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2020-10-28 14:59:49,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-28 14:59:49,633 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 50 [2020-10-28 14:59:49,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:59:49,634 INFO L225 Difference]: With dead ends: 58 [2020-10-28 14:59:49,635 INFO L226 Difference]: Without dead ends: 52 [2020-10-28 14:59:49,636 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 742 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=351, Invalid=6129, Unknown=0, NotChecked=0, Total=6480 [2020-10-28 14:59:49,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-28 14:59:49,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2020-10-28 14:59:49,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-28 14:59:49,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2020-10-28 14:59:49,644 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 50 [2020-10-28 14:59:49,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:59:49,644 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2020-10-28 14:59:49,644 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-28 14:59:49,645 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2020-10-28 14:59:49,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-28 14:59:49,645 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:59:49,645 INFO L422 BasicCegarLoop]: trace histogram [39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:59:49,645 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-28 14:59:49,645 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:59:49,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:59:49,646 INFO L82 PathProgramCache]: Analyzing trace with hash -457517986, now seen corresponding path program 39 times [2020-10-28 14:59:49,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:59:49,646 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1381865449] [2020-10-28 14:59:49,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:59:49,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:59:49,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:59:52,153 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:59:52,154 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-28 14:59:52,154 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:59:52,154 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2477 [2020-10-28 14:59:52,154 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:59:52,154 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:59:52,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 41 [2020-10-28 14:59:52,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:59:52,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-28 14:59:52,154 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:59:53,894 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:59:53,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:59:53,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:59:53,901 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:59:53,901 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:59:53,901 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:59:53,901 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:59:53,902 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:59:53,902 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:59:53,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:59:53,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:59:53,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:59:53,902 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:59:53,911 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:59:53,911 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1381865449] [2020-10-28 14:59:53,911 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:59:53,912 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-10-28 14:59:53,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513493153] [2020-10-28 14:59:53,912 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-28 14:59:53,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:59:53,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-28 14:59:53,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1684, Unknown=0, NotChecked=0, Total=1806 [2020-10-28 14:59:53,913 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand 43 states. [2020-10-28 14:59:58,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:59:58,538 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2020-10-28 14:59:58,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-28 14:59:58,539 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 51 [2020-10-28 14:59:58,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:59:58,540 INFO L225 Difference]: With dead ends: 59 [2020-10-28 14:59:58,540 INFO L226 Difference]: Without dead ends: 53 [2020-10-28 14:59:58,541 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 781 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=360, Invalid=6446, Unknown=0, NotChecked=0, Total=6806 [2020-10-28 14:59:58,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-28 14:59:58,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2020-10-28 14:59:58,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-28 14:59:58,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2020-10-28 14:59:58,549 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 51 [2020-10-28 14:59:58,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:59:58,549 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2020-10-28 14:59:58,549 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-28 14:59:58,549 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2020-10-28 14:59:58,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-28 14:59:58,550 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:59:58,550 INFO L422 BasicCegarLoop]: trace histogram [40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:59:58,550 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-28 14:59:58,550 INFO L429 AbstractCegarLoop]: === Iteration 42 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:59:58,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:59:58,550 INFO L82 PathProgramCache]: Analyzing trace with hash -167867561, now seen corresponding path program 40 times [2020-10-28 14:59:58,551 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:59:58,551 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [748684186] [2020-10-28 14:59:58,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:59:58,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:59:58,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:00:02,275 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:00:02,275 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-28 15:00:02,276 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:00:02,276 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3694 [2020-10-28 15:00:02,276 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:00:02,276 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:00:02,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 42 [2020-10-28 15:00:02,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:00:02,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-28 15:00:02,276 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:00:04,055 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:00:04,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:00:04,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:00:04,060 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:00:04,060 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:00:04,061 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:00:04,061 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:00:04,061 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:00:04,061 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:00:04,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:00:04,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:00:04,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:00:04,061 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:00:04,068 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:00:04,069 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [748684186] [2020-10-28 15:00:04,069 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:00:04,069 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-10-28 15:00:04,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197748995] [2020-10-28 15:00:04,069 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-10-28 15:00:04,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:00:04,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-10-28 15:00:04,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=1767, Unknown=0, NotChecked=0, Total=1892 [2020-10-28 15:00:04,070 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 44 states. [2020-10-28 15:00:09,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:00:09,012 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2020-10-28 15:00:09,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-28 15:00:09,013 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 52 [2020-10-28 15:00:09,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:00:09,014 INFO L225 Difference]: With dead ends: 60 [2020-10-28 15:00:09,014 INFO L226 Difference]: Without dead ends: 54 [2020-10-28 15:00:09,016 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 821 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=369, Invalid=6771, Unknown=0, NotChecked=0, Total=7140 [2020-10-28 15:00:09,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-28 15:00:09,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-10-28 15:00:09,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-28 15:00:09,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2020-10-28 15:00:09,027 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 52 [2020-10-28 15:00:09,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:00:09,028 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2020-10-28 15:00:09,028 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-10-28 15:00:09,028 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2020-10-28 15:00:09,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-28 15:00:09,028 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:00:09,028 INFO L422 BasicCegarLoop]: trace histogram [41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:00:09,028 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-28 15:00:09,028 INFO L429 AbstractCegarLoop]: === Iteration 43 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:00:09,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:00:09,029 INFO L82 PathProgramCache]: Analyzing trace with hash 221361022, now seen corresponding path program 41 times [2020-10-28 15:00:09,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:00:09,029 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [831147087] [2020-10-28 15:00:09,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:00:09,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:00:09,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:00:12,736 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:00:12,737 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-28 15:00:12,737 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:00:12,737 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3677 [2020-10-28 15:00:12,737 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:00:12,737 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:00:12,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 43 [2020-10-28 15:00:12,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:00:12,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-28 15:00:12,738 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:00:14,650 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:00:14,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:00:14,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:00:14,655 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:00:14,656 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:00:14,656 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:00:14,656 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:00:14,656 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:00:14,656 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:00:14,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:00:14,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:00:14,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:00:14,657 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:00:14,663 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:00:14,664 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [831147087] [2020-10-28 15:00:14,664 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:00:14,664 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-10-28 15:00:14,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895622615] [2020-10-28 15:00:14,664 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-10-28 15:00:14,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:00:14,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-10-28 15:00:14,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=1852, Unknown=0, NotChecked=0, Total=1980 [2020-10-28 15:00:14,665 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand 45 states. [2020-10-28 15:00:19,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:00:19,750 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2020-10-28 15:00:19,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-28 15:00:19,751 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 53 [2020-10-28 15:00:19,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:00:19,752 INFO L225 Difference]: With dead ends: 61 [2020-10-28 15:00:19,752 INFO L226 Difference]: Without dead ends: 55 [2020-10-28 15:00:19,753 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 862 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=378, Invalid=7104, Unknown=0, NotChecked=0, Total=7482 [2020-10-28 15:00:19,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-28 15:00:19,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2020-10-28 15:00:19,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-28 15:00:19,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2020-10-28 15:00:19,760 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 53 [2020-10-28 15:00:19,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:00:19,761 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2020-10-28 15:00:19,761 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-10-28 15:00:19,761 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2020-10-28 15:00:19,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-28 15:00:19,761 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:00:19,762 INFO L422 BasicCegarLoop]: trace histogram [42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:00:19,762 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-28 15:00:19,762 INFO L429 AbstractCegarLoop]: === Iteration 44 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:00:19,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:00:19,762 INFO L82 PathProgramCache]: Analyzing trace with hash -597454793, now seen corresponding path program 42 times [2020-10-28 15:00:19,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:00:19,763 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [371456117] [2020-10-28 15:00:19,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:00:19,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:00:19,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:00:23,602 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:00:23,602 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-28 15:00:23,603 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:00:23,603 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3797 [2020-10-28 15:00:23,603 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:00:23,603 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:00:23,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 44 [2020-10-28 15:00:23,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:00:23,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-28 15:00:23,603 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:00:25,619 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:00:25,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:00:25,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:00:25,624 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:00:25,625 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:00:25,625 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:00:25,625 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:00:25,625 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:00:25,625 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:00:25,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:00:25,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:00:25,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:00:25,625 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:00:25,632 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:00:25,633 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [371456117] [2020-10-28 15:00:25,633 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:00:25,633 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-10-28 15:00:25,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319817989] [2020-10-28 15:00:25,633 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-10-28 15:00:25,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:00:25,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-10-28 15:00:25,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=1939, Unknown=0, NotChecked=0, Total=2070 [2020-10-28 15:00:25,634 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 46 states. [2020-10-28 15:00:31,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:00:31,025 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2020-10-28 15:00:31,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-28 15:00:31,026 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 54 [2020-10-28 15:00:31,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:00:31,027 INFO L225 Difference]: With dead ends: 62 [2020-10-28 15:00:31,028 INFO L226 Difference]: Without dead ends: 56 [2020-10-28 15:00:31,029 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 904 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=387, Invalid=7445, Unknown=0, NotChecked=0, Total=7832 [2020-10-28 15:00:31,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-28 15:00:31,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2020-10-28 15:00:31,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-28 15:00:31,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2020-10-28 15:00:31,036 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 54 [2020-10-28 15:00:31,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:00:31,037 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2020-10-28 15:00:31,037 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-10-28 15:00:31,037 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2020-10-28 15:00:31,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-28 15:00:31,037 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:00:31,037 INFO L422 BasicCegarLoop]: trace histogram [43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:00:31,037 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-28 15:00:31,038 INFO L429 AbstractCegarLoop]: === Iteration 45 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:00:31,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:00:31,038 INFO L82 PathProgramCache]: Analyzing trace with hash -210941282, now seen corresponding path program 43 times [2020-10-28 15:00:31,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:00:31,038 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1600527675] [2020-10-28 15:00:31,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:00:31,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:00:31,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:00:34,961 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:00:34,962 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-28 15:00:34,962 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:00:34,962 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3886 [2020-10-28 15:00:34,962 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:00:34,962 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:00:34,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 45 [2020-10-28 15:00:34,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:00:34,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-28 15:00:34,963 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:00:37,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:00:37,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:00:37,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:00:37,077 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:00:37,078 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:00:37,078 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:00:37,078 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:00:37,078 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:00:37,078 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:00:37,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:00:37,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:00:37,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:00:37,079 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:00:37,087 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:00:37,087 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1600527675] [2020-10-28 15:00:37,087 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:00:37,088 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2020-10-28 15:00:37,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719545722] [2020-10-28 15:00:37,088 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-10-28 15:00:37,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:00:37,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-10-28 15:00:37,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=2028, Unknown=0, NotChecked=0, Total=2162 [2020-10-28 15:00:37,089 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand 47 states. [2020-10-28 15:00:42,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:00:42,603 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2020-10-28 15:00:42,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-28 15:00:42,604 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 55 [2020-10-28 15:00:42,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:00:42,605 INFO L225 Difference]: With dead ends: 63 [2020-10-28 15:00:42,605 INFO L226 Difference]: Without dead ends: 57 [2020-10-28 15:00:42,606 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 947 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=396, Invalid=7794, Unknown=0, NotChecked=0, Total=8190 [2020-10-28 15:00:42,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-28 15:00:42,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-10-28 15:00:42,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-28 15:00:42,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2020-10-28 15:00:42,613 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 55 [2020-10-28 15:00:42,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:00:42,613 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2020-10-28 15:00:42,613 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-10-28 15:00:42,614 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2020-10-28 15:00:42,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-28 15:00:42,614 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:00:42,614 INFO L422 BasicCegarLoop]: trace histogram [44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:00:42,614 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-28 15:00:42,614 INFO L429 AbstractCegarLoop]: === Iteration 46 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:00:42,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:00:42,615 INFO L82 PathProgramCache]: Analyzing trace with hash -1113924329, now seen corresponding path program 44 times [2020-10-28 15:00:42,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:00:42,615 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [41997146] [2020-10-28 15:00:42,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:00:42,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:00:42,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:00:46,948 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:00:46,948 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-28 15:00:46,948 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:00:46,948 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4301 [2020-10-28 15:00:46,948 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:00:46,948 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:00:46,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 46 [2020-10-28 15:00:46,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:00:46,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-28 15:00:46,949 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:00:49,144 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:00:49,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:00:49,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:00:49,151 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:00:49,151 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:00:49,151 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:00:49,151 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:00:49,152 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:00:49,152 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:00:49,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:00:49,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:00:49,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:00:49,152 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:00:49,162 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:00:49,162 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [41997146] [2020-10-28 15:00:49,162 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:00:49,162 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2020-10-28 15:00:49,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413861682] [2020-10-28 15:00:49,163 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-10-28 15:00:49,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:00:49,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-10-28 15:00:49,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=2119, Unknown=0, NotChecked=0, Total=2256 [2020-10-28 15:00:49,164 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 48 states. [2020-10-28 15:00:55,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:00:55,056 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2020-10-28 15:00:55,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-28 15:00:55,058 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 56 [2020-10-28 15:00:55,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:00:55,059 INFO L225 Difference]: With dead ends: 64 [2020-10-28 15:00:55,059 INFO L226 Difference]: Without dead ends: 58 [2020-10-28 15:00:55,059 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 991 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=405, Invalid=8151, Unknown=0, NotChecked=0, Total=8556 [2020-10-28 15:00:55,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-28 15:00:55,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2020-10-28 15:00:55,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-28 15:00:55,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2020-10-28 15:00:55,066 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 56 [2020-10-28 15:00:55,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:00:55,067 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2020-10-28 15:00:55,067 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-10-28 15:00:55,067 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2020-10-28 15:00:55,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-28 15:00:55,067 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:00:55,067 INFO L422 BasicCegarLoop]: trace histogram [45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:00:55,068 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-28 15:00:55,068 INFO L429 AbstractCegarLoop]: === Iteration 47 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:00:55,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:00:55,068 INFO L82 PathProgramCache]: Analyzing trace with hash 958372286, now seen corresponding path program 45 times [2020-10-28 15:00:55,068 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:00:55,068 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [940628027] [2020-10-28 15:00:55,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:00:55,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:00:55,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:01:00,106 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:01:00,106 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-28 15:01:00,106 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:01:00,106 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-28 15:01:00,106 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:01:00,106 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:01:00,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 47 [2020-10-28 15:01:00,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:01:00,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-28 15:01:00,107 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:01:02,445 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:01:02,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:01:02,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:01:02,450 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:01:02,451 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:01:02,451 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:01:02,451 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:01:02,451 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:01:02,451 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:01:02,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:01:02,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:01:02,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:01:02,452 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:01:02,461 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:01:02,461 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [940628027] [2020-10-28 15:01:02,461 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:01:02,461 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2020-10-28 15:01:02,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313304575] [2020-10-28 15:01:02,462 INFO L461 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-10-28 15:01:02,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:01:02,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-10-28 15:01:02,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=2212, Unknown=0, NotChecked=0, Total=2352 [2020-10-28 15:01:02,463 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand 49 states. [2020-10-28 15:01:08,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:01:08,679 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2020-10-28 15:01:08,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-28 15:01:08,680 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 57 [2020-10-28 15:01:08,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:01:08,681 INFO L225 Difference]: With dead ends: 65 [2020-10-28 15:01:08,682 INFO L226 Difference]: Without dead ends: 59 [2020-10-28 15:01:08,683 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1036 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=414, Invalid=8516, Unknown=0, NotChecked=0, Total=8930 [2020-10-28 15:01:08,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-28 15:01:08,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2020-10-28 15:01:08,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-28 15:01:08,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2020-10-28 15:01:08,692 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 57 [2020-10-28 15:01:08,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:01:08,692 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2020-10-28 15:01:08,692 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-10-28 15:01:08,692 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2020-10-28 15:01:08,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-28 15:01:08,693 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:01:08,693 INFO L422 BasicCegarLoop]: trace histogram [46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:01:08,693 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-28 15:01:08,693 INFO L429 AbstractCegarLoop]: === Iteration 48 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:01:08,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:01:08,694 INFO L82 PathProgramCache]: Analyzing trace with hash 775057911, now seen corresponding path program 46 times [2020-10-28 15:01:08,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:01:08,694 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1424615690] [2020-10-28 15:01:08,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:01:08,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:01:08,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:01:13,467 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:01:13,468 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-28 15:01:13,468 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:01:13,468 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4724 [2020-10-28 15:01:13,468 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:01:13,468 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:01:13,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 48 [2020-10-28 15:01:13,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:01:13,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-28 15:01:13,468 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:01:15,862 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:01:15,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:01:15,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:01:15,867 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:01:15,867 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:01:15,867 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:01:15,867 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:01:15,867 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:01:15,867 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:01:15,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:01:15,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:01:15,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:01:15,868 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:01:15,876 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:01:15,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1424615690] [2020-10-28 15:01:15,876 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:01:15,876 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2020-10-28 15:01:15,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994277862] [2020-10-28 15:01:15,877 INFO L461 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-10-28 15:01:15,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:01:15,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-10-28 15:01:15,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=2307, Unknown=0, NotChecked=0, Total=2450 [2020-10-28 15:01:15,878 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 50 states. [2020-10-28 15:01:22,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:01:22,329 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2020-10-28 15:01:22,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-10-28 15:01:22,330 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 58 [2020-10-28 15:01:22,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:01:22,331 INFO L225 Difference]: With dead ends: 66 [2020-10-28 15:01:22,331 INFO L226 Difference]: Without dead ends: 60 [2020-10-28 15:01:22,333 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1082 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=423, Invalid=8889, Unknown=0, NotChecked=0, Total=9312 [2020-10-28 15:01:22,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-28 15:01:22,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2020-10-28 15:01:22,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-28 15:01:22,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 60 transitions. [2020-10-28 15:01:22,342 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 60 transitions. Word has length 58 [2020-10-28 15:01:22,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:01:22,342 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 60 transitions. [2020-10-28 15:01:22,342 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-10-28 15:01:22,342 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 60 transitions. [2020-10-28 15:01:22,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-28 15:01:22,343 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:01:22,343 INFO L422 BasicCegarLoop]: trace histogram [47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:01:22,343 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-28 15:01:22,343 INFO L429 AbstractCegarLoop]: === Iteration 49 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:01:22,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:01:22,343 INFO L82 PathProgramCache]: Analyzing trace with hash -612720418, now seen corresponding path program 47 times [2020-10-28 15:01:22,344 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:01:22,344 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [892001830] [2020-10-28 15:01:22,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:01:22,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:01:22,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:01:27,420 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:01:27,421 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-28 15:01:27,421 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:01:27,421 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5036 [2020-10-28 15:01:27,421 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:01:27,421 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:01:27,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 49 [2020-10-28 15:01:27,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:01:27,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-28 15:01:27,421 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0