/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/array-examples/standard_two_index_09.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 09:10:20,398 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 09:10:20,402 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 09:10:20,456 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 09:10:20,456 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 09:10:20,463 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 09:10:20,465 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 09:10:20,469 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 09:10:20,472 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 09:10:20,479 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 09:10:20,481 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 09:10:20,482 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 09:10:20,483 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 09:10:20,487 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 09:10:20,488 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 09:10:20,490 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 09:10:20,491 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 09:10:20,495 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 09:10:20,503 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 09:10:20,509 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 09:10:20,512 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 09:10:20,513 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 09:10:20,514 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 09:10:20,517 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 09:10:20,526 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 09:10:20,526 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 09:10:20,526 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 09:10:20,527 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 09:10:20,528 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 09:10:20,531 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 09:10:20,532 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 09:10:20,532 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 09:10:20,534 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 09:10:20,535 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 09:10:20,536 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 09:10:20,536 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 09:10:20,537 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 09:10:20,537 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 09:10:20,538 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 09:10:20,538 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 09:10:20,546 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 09:10:20,555 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-28 09:10:20,610 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 09:10:20,610 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 09:10:20,612 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 09:10:20,612 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 09:10:20,612 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 09:10:20,612 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 09:10:20,613 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 09:10:20,613 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 09:10:20,613 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 09:10:20,613 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 09:10:20,613 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 09:10:20,614 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 09:10:20,614 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 09:10:20,614 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 09:10:20,614 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 09:10:20,614 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 09:10:20,615 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 09:10:20,615 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 09:10:20,615 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 09:10:20,615 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 09:10:20,615 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 09:10:20,616 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 09:10:20,616 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 09:10:20,616 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 09:10:20,616 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 09:10:20,617 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 09:10:20,617 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 09:10:20,617 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 09:10:20,617 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 09:10:20,617 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 09:10:20,975 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 09:10:21,013 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 09:10:21,017 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 09:10:21,019 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 09:10:21,020 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 09:10:21,021 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_two_index_09.i [2020-10-28 09:10:21,094 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d5ef2ba6e/dd2ca49bc8ae4d2b897d212a51ccd560/FLAGa78a754a7 [2020-10-28 09:10:21,629 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 09:10:21,630 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/standard_two_index_09.i [2020-10-28 09:10:21,637 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d5ef2ba6e/dd2ca49bc8ae4d2b897d212a51ccd560/FLAGa78a754a7 [2020-10-28 09:10:21,993 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d5ef2ba6e/dd2ca49bc8ae4d2b897d212a51ccd560 [2020-10-28 09:10:21,996 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 09:10:22,002 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 09:10:22,006 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 09:10:22,006 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 09:10:22,010 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 09:10:22,011 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 09:10:21" (1/1) ... [2020-10-28 09:10:22,019 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1916843a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:10:22, skipping insertion in model container [2020-10-28 09:10:22,020 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 09:10:21" (1/1) ... [2020-10-28 09:10:22,029 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 09:10:22,051 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 09:10:22,234 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 09:10:22,243 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 09:10:22,264 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 09:10:22,280 INFO L208 MainTranslator]: Completed translation [2020-10-28 09:10:22,280 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:10:22 WrapperNode [2020-10-28 09:10:22,281 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 09:10:22,282 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 09:10:22,282 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 09:10:22,282 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 09:10:22,304 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:10:22" (1/1) ... [2020-10-28 09:10:22,304 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:10:22" (1/1) ... [2020-10-28 09:10:22,312 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:10:22" (1/1) ... [2020-10-28 09:10:22,312 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:10:22" (1/1) ... [2020-10-28 09:10:22,326 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:10:22" (1/1) ... [2020-10-28 09:10:22,334 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:10:22" (1/1) ... [2020-10-28 09:10:22,335 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:10:22" (1/1) ... [2020-10-28 09:10:22,352 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 09:10:22,355 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 09:10:22,355 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 09:10:22,355 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 09:10:22,356 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:10:22" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 09:10:22,448 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 09:10:22,448 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 09:10:22,449 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 09:10:22,449 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-28 09:10:22,450 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 09:10:22,450 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 09:10:22,450 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 09:10:22,451 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-28 09:10:22,451 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-28 09:10:22,451 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 09:10:22,452 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 09:10:22,452 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-28 09:10:22,452 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-28 09:10:22,452 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 09:10:22,453 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 09:10:22,455 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 09:10:22,455 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 09:10:22,455 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 09:10:22,455 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 09:10:22,456 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 09:10:22,897 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 09:10:22,897 INFO L298 CfgBuilder]: Removed 3 assume(true) statements. [2020-10-28 09:10:22,899 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 09:10:22 BoogieIcfgContainer [2020-10-28 09:10:22,899 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 09:10:22,904 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 09:10:22,904 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 09:10:22,908 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 09:10:22,908 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 09:10:21" (1/3) ... [2020-10-28 09:10:22,910 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38c8972a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 09:10:22, skipping insertion in model container [2020-10-28 09:10:22,910 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:10:22" (2/3) ... [2020-10-28 09:10:22,911 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38c8972a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 09:10:22, skipping insertion in model container [2020-10-28 09:10:22,911 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 09:10:22" (3/3) ... [2020-10-28 09:10:22,913 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_two_index_09.i [2020-10-28 09:10:22,927 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 09:10:22,932 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 09:10:22,949 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 09:10:22,987 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 09:10:22,987 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 09:10:22,988 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 09:10:22,988 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 09:10:22,988 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 09:10:22,988 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 09:10:22,988 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 09:10:22,988 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 09:10:23,010 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2020-10-28 09:10:23,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-28 09:10:23,020 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:10:23,021 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:10:23,021 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:10:23,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:10:23,036 INFO L82 PathProgramCache]: Analyzing trace with hash 1774182118, now seen corresponding path program 1 times [2020-10-28 09:10:23,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:10:23,047 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1328509946] [2020-10-28 09:10:23,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:10:23,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:10:23,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:23,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:23,589 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:10:23,590 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-28 09:10:23,591 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:10:23,591 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 364 [2020-10-28 09:10:23,594 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:10:23,594 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:10:23,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:10:23,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-28 09:10:23,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:10:23,595 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 09:10:23,696 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:10:23,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:10:23,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:23,710 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:10:23,710 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:10:23,710 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:10:23,711 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 09:10:23,711 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:10:23,711 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:10:23,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:10:23,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:10:23,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:10:23,712 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:10:23,722 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 09:10:23,723 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1328509946] [2020-10-28 09:10:23,725 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 09:10:23,725 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-28 09:10:23,726 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140295687] [2020-10-28 09:10:23,730 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-28 09:10:23,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:10:23,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-28 09:10:23,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-28 09:10:23,748 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 3 states. [2020-10-28 09:10:23,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:10:23,848 INFO L93 Difference]: Finished difference Result 48 states and 62 transitions. [2020-10-28 09:10:23,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-28 09:10:23,850 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-10-28 09:10:23,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:10:23,858 INFO L225 Difference]: With dead ends: 48 [2020-10-28 09:10:23,858 INFO L226 Difference]: Without dead ends: 21 [2020-10-28 09:10:23,861 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-28 09:10:23,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-10-28 09:10:23,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-10-28 09:10:23,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-28 09:10:23,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2020-10-28 09:10:23,902 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 17 [2020-10-28 09:10:23,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:10:23,903 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2020-10-28 09:10:23,903 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-28 09:10:23,903 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2020-10-28 09:10:23,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-28 09:10:23,904 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:10:23,904 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:10:23,904 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 09:10:23,905 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:10:23,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:10:23,906 INFO L82 PathProgramCache]: Analyzing trace with hash 414065378, now seen corresponding path program 1 times [2020-10-28 09:10:23,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:10:23,906 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2122359725] [2020-10-28 09:10:23,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:10:23,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:10:23,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:23,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:24,084 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:10:24,085 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-28 09:10:24,085 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:10:24,085 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 164 [2020-10-28 09:10:24,086 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:10:24,086 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:10:24,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 09:10:24,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-28 09:10:24,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 09:10:24,087 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:10:24,141 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:10:24,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:10:24,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:24,158 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:10:24,159 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:10:24,159 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:10:24,159 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 09:10:24,160 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:10:24,160 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:10:24,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:10:24,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:10:24,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:10:24,162 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-28 09:10:24,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 09:10:24,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2122359725] [2020-10-28 09:10:24,177 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 09:10:24,177 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 09:10:24,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572166788] [2020-10-28 09:10:24,179 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 09:10:24,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:10:24,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 09:10:24,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 09:10:24,186 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 4 states. [2020-10-28 09:10:24,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:10:24,284 INFO L93 Difference]: Finished difference Result 40 states and 46 transitions. [2020-10-28 09:10:24,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 09:10:24,285 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2020-10-28 09:10:24,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:10:24,287 INFO L225 Difference]: With dead ends: 40 [2020-10-28 09:10:24,287 INFO L226 Difference]: Without dead ends: 26 [2020-10-28 09:10:24,288 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 09:10:24,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-10-28 09:10:24,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 23. [2020-10-28 09:10:24,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-28 09:10:24,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2020-10-28 09:10:24,300 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 17 [2020-10-28 09:10:24,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:10:24,300 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2020-10-28 09:10:24,300 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 09:10:24,301 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2020-10-28 09:10:24,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-28 09:10:24,301 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:10:24,302 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:10:24,302 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 09:10:24,302 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:10:24,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:10:24,303 INFO L82 PathProgramCache]: Analyzing trace with hash -1170351871, now seen corresponding path program 1 times [2020-10-28 09:10:24,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:10:24,303 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1621389407] [2020-10-28 09:10:24,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:10:24,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:10:24,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:24,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:24,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:24,881 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:10:24,881 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-28 09:10:24,881 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:10:24,882 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 564 [2020-10-28 09:10:24,882 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:10:24,882 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:10:24,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 09:10:24,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-28 09:10:24,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-28 09:10:24,883 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:10:24,928 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:10:24,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:10:24,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:24,937 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:10:24,937 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:10:24,937 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:10:24,938 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 09:10:24,938 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:10:24,938 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:10:24,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:10:24,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:10:24,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:10:24,939 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:10:24,942 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 09:10:24,942 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1621389407] [2020-10-28 09:10:24,943 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:10:24,943 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 09:10:24,943 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408919018] [2020-10-28 09:10:24,944 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 09:10:24,944 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:10:24,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 09:10:24,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 09:10:24,945 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 5 states. [2020-10-28 09:10:25,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:10:25,038 INFO L93 Difference]: Finished difference Result 46 states and 53 transitions. [2020-10-28 09:10:25,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 09:10:25,038 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2020-10-28 09:10:25,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:10:25,039 INFO L225 Difference]: With dead ends: 46 [2020-10-28 09:10:25,040 INFO L226 Difference]: Without dead ends: 31 [2020-10-28 09:10:25,040 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 09:10:25,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-28 09:10:25,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 25. [2020-10-28 09:10:25,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-28 09:10:25,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2020-10-28 09:10:25,048 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 19 [2020-10-28 09:10:25,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:10:25,048 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2020-10-28 09:10:25,049 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 09:10:25,049 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2020-10-28 09:10:25,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-28 09:10:25,049 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:10:25,050 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:10:25,050 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 09:10:25,050 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:10:25,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:10:25,051 INFO L82 PathProgramCache]: Analyzing trace with hash -1420739774, now seen corresponding path program 2 times [2020-10-28 09:10:25,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:10:25,051 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1225669626] [2020-10-28 09:10:25,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:10:25,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:10:25,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:25,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:25,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:25,856 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:10:25,856 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-28 09:10:25,857 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:10:25,857 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 792 [2020-10-28 09:10:25,857 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:10:25,857 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:10:25,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 09:10:25,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:10:25,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-28 09:10:25,858 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:10:25,904 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:10:25,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:10:25,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:25,910 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:10:25,910 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:10:25,910 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:10:25,911 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:10:25,911 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:10:25,911 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:10:25,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:10:25,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:10:25,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:10:25,912 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:10:25,915 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-28 09:10:25,915 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1225669626] [2020-10-28 09:10:25,916 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:10:25,916 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 09:10:25,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421128750] [2020-10-28 09:10:25,917 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 09:10:25,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:10:25,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 09:10:25,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-28 09:10:25,918 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 6 states. [2020-10-28 09:10:25,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:10:25,999 INFO L93 Difference]: Finished difference Result 45 states and 50 transitions. [2020-10-28 09:10:25,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 09:10:26,000 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2020-10-28 09:10:26,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:10:26,001 INFO L225 Difference]: With dead ends: 45 [2020-10-28 09:10:26,001 INFO L226 Difference]: Without dead ends: 29 [2020-10-28 09:10:26,002 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-28 09:10:26,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-28 09:10:26,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 26. [2020-10-28 09:10:26,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-28 09:10:26,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2020-10-28 09:10:26,008 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 21 [2020-10-28 09:10:26,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:10:26,009 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2020-10-28 09:10:26,009 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 09:10:26,009 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2020-10-28 09:10:26,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-28 09:10:26,010 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:10:26,010 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:10:26,010 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 09:10:26,010 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:10:26,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:10:26,011 INFO L82 PathProgramCache]: Analyzing trace with hash -1957781260, now seen corresponding path program 3 times [2020-10-28 09:10:26,011 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:10:26,012 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [799856264] [2020-10-28 09:10:26,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:10:26,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:10:26,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:26,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:26,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:26,980 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:10:26,980 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-28 09:10:26,981 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:10:26,981 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 957 [2020-10-28 09:10:26,981 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:10:26,981 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:10:26,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 09:10:26,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:10:26,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-28 09:10:26,982 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:10:27,033 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:10:27,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:10:27,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:27,039 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:10:27,040 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:10:27,040 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:10:27,040 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:10:27,040 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:10:27,041 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:10:27,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:10:27,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:10:27,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:10:27,042 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:10:27,045 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-28 09:10:27,045 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [799856264] [2020-10-28 09:10:27,046 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:10:27,046 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 09:10:27,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422280611] [2020-10-28 09:10:27,047 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 09:10:27,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:10:27,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 09:10:27,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-28 09:10:27,048 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand 7 states. [2020-10-28 09:10:27,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:10:27,136 INFO L93 Difference]: Finished difference Result 46 states and 51 transitions. [2020-10-28 09:10:27,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 09:10:27,137 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 22 [2020-10-28 09:10:27,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:10:27,138 INFO L225 Difference]: With dead ends: 46 [2020-10-28 09:10:27,138 INFO L226 Difference]: Without dead ends: 30 [2020-10-28 09:10:27,138 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-28 09:10:27,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-28 09:10:27,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 27. [2020-10-28 09:10:27,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-28 09:10:27,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2020-10-28 09:10:27,145 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 22 [2020-10-28 09:10:27,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:10:27,145 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2020-10-28 09:10:27,145 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 09:10:27,145 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2020-10-28 09:10:27,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-28 09:10:27,149 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:10:27,149 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:10:27,149 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 09:10:27,149 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:10:27,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:10:27,150 INFO L82 PathProgramCache]: Analyzing trace with hash -1426198142, now seen corresponding path program 4 times [2020-10-28 09:10:27,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:10:27,150 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1472849948] [2020-10-28 09:10:27,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:10:27,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:10:27,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:27,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:27,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:28,132 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:10:28,133 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-28 09:10:28,133 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:10:28,133 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 971 [2020-10-28 09:10:28,134 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:10:28,134 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:10:28,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 09:10:28,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:10:28,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 09:10:28,135 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:10:28,197 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:10:28,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:10:28,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:28,203 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:10:28,203 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:10:28,203 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:10:28,203 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:10:28,204 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:10:28,204 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:10:28,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:10:28,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:10:28,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:10:28,205 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:10:28,208 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-28 09:10:28,208 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1472849948] [2020-10-28 09:10:28,209 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:10:28,209 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 09:10:28,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885442544] [2020-10-28 09:10:28,209 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 09:10:28,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:10:28,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 09:10:28,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-28 09:10:28,211 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand 8 states. [2020-10-28 09:10:28,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:10:28,302 INFO L93 Difference]: Finished difference Result 47 states and 52 transitions. [2020-10-28 09:10:28,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 09:10:28,302 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 23 [2020-10-28 09:10:28,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:10:28,303 INFO L225 Difference]: With dead ends: 47 [2020-10-28 09:10:28,303 INFO L226 Difference]: Without dead ends: 31 [2020-10-28 09:10:28,304 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-28 09:10:28,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-28 09:10:28,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 28. [2020-10-28 09:10:28,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-28 09:10:28,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2020-10-28 09:10:28,310 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 23 [2020-10-28 09:10:28,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:10:28,310 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2020-10-28 09:10:28,310 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 09:10:28,310 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2020-10-28 09:10:28,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-28 09:10:28,311 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:10:28,311 INFO L422 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:10:28,312 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 09:10:28,312 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:10:28,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:10:28,312 INFO L82 PathProgramCache]: Analyzing trace with hash -2126990668, now seen corresponding path program 5 times [2020-10-28 09:10:28,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:10:28,313 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1822745463] [2020-10-28 09:10:28,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:10:28,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:10:28,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:28,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:28,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:29,764 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:10:29,764 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-28 09:10:29,764 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:10:29,765 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1439 [2020-10-28 09:10:29,765 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:10:29,765 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:10:29,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 09:10:29,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-28 09:10:29,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-28 09:10:29,766 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:10:29,818 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:10:29,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:10:29,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:29,826 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:10:29,826 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:10:29,826 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:10:29,827 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 09:10:29,827 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:10:29,827 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:10:29,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:10:29,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:10:29,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:10:29,829 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:10:29,833 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-28 09:10:29,833 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1822745463] [2020-10-28 09:10:29,834 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:10:29,834 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 09:10:29,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616388062] [2020-10-28 09:10:29,835 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 09:10:29,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:10:29,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 09:10:29,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-28 09:10:29,836 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 6 states. [2020-10-28 09:10:29,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:10:29,965 INFO L93 Difference]: Finished difference Result 50 states and 56 transitions. [2020-10-28 09:10:29,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 09:10:29,966 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 24 [2020-10-28 09:10:29,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:10:29,967 INFO L225 Difference]: With dead ends: 50 [2020-10-28 09:10:29,967 INFO L226 Difference]: Without dead ends: 38 [2020-10-28 09:10:29,968 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-28 09:10:29,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-28 09:10:29,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 29. [2020-10-28 09:10:29,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-28 09:10:29,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2020-10-28 09:10:29,975 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 24 [2020-10-28 09:10:29,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:10:29,975 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2020-10-28 09:10:29,975 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 09:10:29,975 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2020-10-28 09:10:29,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-28 09:10:29,976 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:10:29,977 INFO L422 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:10:29,977 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 09:10:29,977 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:10:29,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:10:29,978 INFO L82 PathProgramCache]: Analyzing trace with hash -1964278815, now seen corresponding path program 6 times [2020-10-28 09:10:29,978 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:10:29,978 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [651314248] [2020-10-28 09:10:29,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:10:29,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:10:30,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:30,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:30,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:31,597 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:10:31,597 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-28 09:10:31,597 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:10:31,598 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1605 [2020-10-28 09:10:31,598 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:10:31,598 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:10:31,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 09:10:31,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:10:31,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-28 09:10:31,599 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:10:31,688 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:10:31,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:10:31,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:31,695 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:10:31,696 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:10:31,696 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:10:31,696 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 09:10:31,697 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:10:31,697 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:10:31,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:10:31,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:10:31,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:10:31,698 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:10:31,703 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-28 09:10:31,703 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [651314248] [2020-10-28 09:10:31,703 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:10:31,704 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-28 09:10:31,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835749439] [2020-10-28 09:10:31,705 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 09:10:31,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:10:31,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 09:10:31,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-28 09:10:31,706 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand 9 states. [2020-10-28 09:10:31,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:10:31,831 INFO L93 Difference]: Finished difference Result 50 states and 55 transitions. [2020-10-28 09:10:31,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 09:10:31,832 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 25 [2020-10-28 09:10:31,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:10:31,833 INFO L225 Difference]: With dead ends: 50 [2020-10-28 09:10:31,833 INFO L226 Difference]: Without dead ends: 33 [2020-10-28 09:10:31,834 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-28 09:10:31,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-28 09:10:31,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 30. [2020-10-28 09:10:31,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-28 09:10:31,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2020-10-28 09:10:31,840 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 25 [2020-10-28 09:10:31,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:10:31,840 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2020-10-28 09:10:31,840 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 09:10:31,840 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2020-10-28 09:10:31,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-28 09:10:31,841 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:10:31,841 INFO L422 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:10:31,842 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 09:10:31,842 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:10:31,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:10:31,843 INFO L82 PathProgramCache]: Analyzing trace with hash -1116030829, now seen corresponding path program 7 times [2020-10-28 09:10:31,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:10:31,843 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1836517436] [2020-10-28 09:10:31,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:10:31,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:10:31,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:31,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:32,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:33,697 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:10:33,698 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-28 09:10:33,698 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:10:33,698 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1837 [2020-10-28 09:10:33,698 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:10:33,698 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:10:33,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 09:10:33,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:10:33,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-28 09:10:33,699 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:10:33,783 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:10:33,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:10:33,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:33,789 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:10:33,789 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:10:33,790 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:10:33,790 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 09:10:33,790 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:10:33,790 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:10:33,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:10:33,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:10:33,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:10:33,791 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:10:33,796 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-28 09:10:33,797 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1836517436] [2020-10-28 09:10:33,797 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:10:33,797 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 09:10:33,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857317663] [2020-10-28 09:10:33,798 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 09:10:33,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:10:33,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 09:10:33,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-28 09:10:33,805 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 10 states. [2020-10-28 09:10:33,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:10:33,915 INFO L93 Difference]: Finished difference Result 51 states and 56 transitions. [2020-10-28 09:10:33,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 09:10:33,916 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 26 [2020-10-28 09:10:33,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:10:33,917 INFO L225 Difference]: With dead ends: 51 [2020-10-28 09:10:33,917 INFO L226 Difference]: Without dead ends: 34 [2020-10-28 09:10:33,918 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-28 09:10:33,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-28 09:10:33,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 31. [2020-10-28 09:10:33,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-28 09:10:33,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2020-10-28 09:10:33,928 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 26 [2020-10-28 09:10:33,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:10:33,929 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2020-10-28 09:10:33,929 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 09:10:33,929 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2020-10-28 09:10:33,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-28 09:10:33,930 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:10:33,930 INFO L422 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:10:33,931 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 09:10:33,931 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:10:33,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:10:33,931 INFO L82 PathProgramCache]: Analyzing trace with hash -590147039, now seen corresponding path program 8 times [2020-10-28 09:10:33,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:10:33,932 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [359082008] [2020-10-28 09:10:33,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:10:33,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:10:33,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:33,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:34,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:36,224 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:10:36,224 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-28 09:10:36,225 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:10:36,225 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2277 [2020-10-28 09:10:36,225 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:10:36,225 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:10:36,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 09:10:36,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 09:10:36,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-28 09:10:36,227 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:10:36,288 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:10:36,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:10:36,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:36,293 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:10:36,293 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:10:36,293 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:10:36,293 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:10:36,294 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:10:36,294 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:10:36,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:10:36,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:10:36,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:10:36,295 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:10:36,298 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-10-28 09:10:36,298 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [359082008] [2020-10-28 09:10:36,299 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:10:36,299 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 09:10:36,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919834097] [2020-10-28 09:10:36,300 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 09:10:36,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:10:36,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 09:10:36,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-28 09:10:36,301 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand 7 states. [2020-10-28 09:10:36,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:10:36,441 INFO L93 Difference]: Finished difference Result 56 states and 63 transitions. [2020-10-28 09:10:36,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 09:10:36,441 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 27 [2020-10-28 09:10:36,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:10:36,442 INFO L225 Difference]: With dead ends: 56 [2020-10-28 09:10:36,442 INFO L226 Difference]: Without dead ends: 44 [2020-10-28 09:10:36,445 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-28 09:10:36,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-28 09:10:36,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 32. [2020-10-28 09:10:36,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-28 09:10:36,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2020-10-28 09:10:36,452 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 27 [2020-10-28 09:10:36,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:10:36,452 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2020-10-28 09:10:36,452 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 09:10:36,453 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2020-10-28 09:10:36,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-28 09:10:36,455 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:10:36,455 INFO L422 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:10:36,455 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 09:10:36,455 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:10:36,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:10:36,456 INFO L82 PathProgramCache]: Analyzing trace with hash -1566766572, now seen corresponding path program 9 times [2020-10-28 09:10:36,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:10:36,456 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1148091572] [2020-10-28 09:10:36,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:10:36,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:10:36,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:36,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:36,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:39,121 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:10:39,122 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-28 09:10:39,122 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:10:39,122 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2650 [2020-10-28 09:10:39,122 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:10:39,122 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:10:39,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 09:10:39,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:10:39,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-28 09:10:39,123 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:10:39,220 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:10:39,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:10:39,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:39,227 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:10:39,227 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:10:39,228 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:10:39,229 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 09:10:39,229 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:10:39,229 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:10:39,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:10:39,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:10:39,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:10:39,230 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:10:39,234 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-28 09:10:39,235 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1148091572] [2020-10-28 09:10:39,235 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:10:39,235 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 09:10:39,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159326739] [2020-10-28 09:10:39,236 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 09:10:39,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:10:39,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 09:10:39,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-28 09:10:39,237 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 11 states. [2020-10-28 09:10:39,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:10:39,348 INFO L93 Difference]: Finished difference Result 54 states and 59 transitions. [2020-10-28 09:10:39,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 09:10:39,349 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 28 [2020-10-28 09:10:39,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:10:39,350 INFO L225 Difference]: With dead ends: 54 [2020-10-28 09:10:39,350 INFO L226 Difference]: Without dead ends: 36 [2020-10-28 09:10:39,350 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-28 09:10:39,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-28 09:10:39,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 33. [2020-10-28 09:10:39,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-28 09:10:39,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2020-10-28 09:10:39,357 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 28 [2020-10-28 09:10:39,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:10:39,359 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2020-10-28 09:10:39,360 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 09:10:39,360 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2020-10-28 09:10:39,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-28 09:10:39,362 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:10:39,362 INFO L422 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:10:39,362 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 09:10:39,363 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:10:39,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:10:39,363 INFO L82 PathProgramCache]: Analyzing trace with hash 1296381986, now seen corresponding path program 10 times [2020-10-28 09:10:39,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:10:39,363 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1624734606] [2020-10-28 09:10:39,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:10:39,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:10:39,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:39,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:39,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:41,867 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:10:41,867 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-28 09:10:41,867 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:10:41,868 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2486 [2020-10-28 09:10:41,868 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:10:41,868 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:10:41,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 09:10:41,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-28 09:10:41,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 09:10:41,869 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:10:41,927 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:10:41,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:10:41,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:41,933 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:10:41,933 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:10:41,933 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:10:41,933 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:10:41,934 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:10:41,934 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:10:41,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:10:41,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:10:41,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:10:41,934 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:10:41,938 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-28 09:10:41,938 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1624734606] [2020-10-28 09:10:41,939 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:10:41,939 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 09:10:41,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279196920] [2020-10-28 09:10:41,940 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 09:10:41,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:10:41,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 09:10:41,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-28 09:10:41,941 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand 8 states. [2020-10-28 09:10:42,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:10:42,062 INFO L93 Difference]: Finished difference Result 61 states and 69 transitions. [2020-10-28 09:10:42,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 09:10:42,063 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 29 [2020-10-28 09:10:42,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:10:42,064 INFO L225 Difference]: With dead ends: 61 [2020-10-28 09:10:42,064 INFO L226 Difference]: Without dead ends: 49 [2020-10-28 09:10:42,065 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-28 09:10:42,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-28 09:10:42,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 34. [2020-10-28 09:10:42,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-28 09:10:42,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2020-10-28 09:10:42,071 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 29 [2020-10-28 09:10:42,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:10:42,071 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2020-10-28 09:10:42,071 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 09:10:42,071 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2020-10-28 09:10:42,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-28 09:10:42,072 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:10:42,072 INFO L422 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:10:42,072 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 09:10:42,073 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:10:42,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:10:42,073 INFO L82 PathProgramCache]: Analyzing trace with hash 1081058355, now seen corresponding path program 11 times [2020-10-28 09:10:42,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:10:42,074 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [738715889] [2020-10-28 09:10:42,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:10:42,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:10:42,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:42,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:42,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:44,722 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:10:44,723 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-28 09:10:44,723 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:10:44,723 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2634 [2020-10-28 09:10:44,723 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:10:44,723 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:10:44,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 09:10:44,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:10:44,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-28 09:10:44,724 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:10:44,858 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:10:44,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:10:44,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:44,864 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:10:44,864 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:10:44,864 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:10:44,865 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:10:44,865 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:10:44,865 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:10:44,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:10:44,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:10:44,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:10:44,866 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:10:44,870 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-28 09:10:44,870 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [738715889] [2020-10-28 09:10:44,871 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:10:44,871 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 09:10:44,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535368689] [2020-10-28 09:10:44,872 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 09:10:44,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:10:44,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 09:10:44,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-28 09:10:44,873 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand 12 states. [2020-10-28 09:10:44,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:10:44,946 INFO L93 Difference]: Finished difference Result 57 states and 62 transitions. [2020-10-28 09:10:44,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 09:10:44,946 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 30 [2020-10-28 09:10:44,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:10:44,947 INFO L225 Difference]: With dead ends: 57 [2020-10-28 09:10:44,947 INFO L226 Difference]: Without dead ends: 38 [2020-10-28 09:10:44,948 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-28 09:10:44,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-28 09:10:44,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 35. [2020-10-28 09:10:44,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-28 09:10:44,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2020-10-28 09:10:44,958 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 30 [2020-10-28 09:10:44,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:10:44,958 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2020-10-28 09:10:44,958 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 09:10:44,958 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2020-10-28 09:10:44,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-28 09:10:44,961 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:10:44,961 INFO L422 BasicCegarLoop]: trace histogram [9, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:10:44,962 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-28 09:10:44,962 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:10:44,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:10:44,962 INFO L82 PathProgramCache]: Analyzing trace with hash -507214143, now seen corresponding path program 12 times [2020-10-28 09:10:44,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:10:44,963 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [78019885] [2020-10-28 09:10:44,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:10:44,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:10:44,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:45,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:45,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:47,785 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:10:47,786 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-28 09:10:47,786 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:10:47,787 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2796 [2020-10-28 09:10:47,787 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:10:47,787 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:10:47,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 09:10:47,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:10:47,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-28 09:10:47,788 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:10:47,897 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:10:47,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:10:47,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:47,903 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:10:47,904 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:10:47,904 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:10:47,904 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 09:10:47,904 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:10:47,904 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:10:47,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:10:47,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:10:47,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:10:47,905 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:10:47,908 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-28 09:10:47,909 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [78019885] [2020-10-28 09:10:47,909 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:10:47,909 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 09:10:47,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230619932] [2020-10-28 09:10:47,910 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 09:10:47,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:10:47,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 09:10:47,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-28 09:10:47,911 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand 13 states. [2020-10-28 09:10:48,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:10:48,027 INFO L93 Difference]: Finished difference Result 58 states and 63 transitions. [2020-10-28 09:10:48,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 09:10:48,028 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 31 [2020-10-28 09:10:48,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:10:48,029 INFO L225 Difference]: With dead ends: 58 [2020-10-28 09:10:48,029 INFO L226 Difference]: Without dead ends: 39 [2020-10-28 09:10:48,030 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-28 09:10:48,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-28 09:10:48,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 36. [2020-10-28 09:10:48,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-28 09:10:48,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2020-10-28 09:10:48,035 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 31 [2020-10-28 09:10:48,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:10:48,035 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2020-10-28 09:10:48,035 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 09:10:48,035 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2020-10-28 09:10:48,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-28 09:10:48,036 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:10:48,036 INFO L422 BasicCegarLoop]: trace histogram [10, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:10:48,036 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-28 09:10:48,037 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:10:48,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:10:48,037 INFO L82 PathProgramCache]: Analyzing trace with hash 1795945971, now seen corresponding path program 13 times [2020-10-28 09:10:48,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:10:48,038 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [997047016] [2020-10-28 09:10:48,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:10:48,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:10:48,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:48,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:48,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:51,002 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:10:51,002 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-28 09:10:51,002 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:10:51,002 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2950 [2020-10-28 09:10:51,003 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:10:51,003 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:10:51,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 09:10:51,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-28 09:10:51,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-28 09:10:51,003 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:10:51,101 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:10:51,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:10:51,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:51,107 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:10:51,107 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:10:51,107 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:10:51,107 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:10:51,108 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:10:51,108 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:10:51,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:10:51,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:10:51,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:10:51,108 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:10:51,111 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2020-10-28 09:10:51,112 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [997047016] [2020-10-28 09:10:51,112 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:10:51,112 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-28 09:10:51,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680165510] [2020-10-28 09:10:51,113 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 09:10:51,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:10:51,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 09:10:51,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-28 09:10:51,114 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand 9 states. [2020-10-28 09:10:51,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:10:51,294 INFO L93 Difference]: Finished difference Result 67 states and 76 transitions. [2020-10-28 09:10:51,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 09:10:51,295 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 32 [2020-10-28 09:10:51,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:10:51,296 INFO L225 Difference]: With dead ends: 67 [2020-10-28 09:10:51,296 INFO L226 Difference]: Without dead ends: 55 [2020-10-28 09:10:51,297 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-28 09:10:51,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-28 09:10:51,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 37. [2020-10-28 09:10:51,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-28 09:10:51,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2020-10-28 09:10:51,307 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 32 [2020-10-28 09:10:51,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:10:51,308 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2020-10-28 09:10:51,308 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 09:10:51,308 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2020-10-28 09:10:51,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-28 09:10:51,308 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:10:51,308 INFO L422 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:10:51,309 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-28 09:10:51,309 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:10:51,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:10:51,312 INFO L82 PathProgramCache]: Analyzing trace with hash -612327294, now seen corresponding path program 14 times [2020-10-28 09:10:51,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:10:51,312 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [248540484] [2020-10-28 09:10:51,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:10:51,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:10:51,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:51,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:51,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:53,845 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:10:53,845 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-28 09:10:53,846 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:10:53,846 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2515 [2020-10-28 09:10:53,846 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:10:53,846 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:10:53,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 09:10:53,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:10:53,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-28 09:10:53,846 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:10:54,007 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:10:54,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:10:54,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:54,013 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:10:54,013 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:10:54,013 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:10:54,014 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:10:54,014 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:10:54,014 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:10:54,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:10:54,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:10:54,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:10:54,014 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:10:54,018 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-10-28 09:10:54,018 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [248540484] [2020-10-28 09:10:54,018 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:10:54,019 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 09:10:54,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852629816] [2020-10-28 09:10:54,026 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 09:10:54,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:10:54,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 09:10:54,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-28 09:10:54,027 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand 14 states. [2020-10-28 09:10:54,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:10:54,164 INFO L93 Difference]: Finished difference Result 64 states and 70 transitions. [2020-10-28 09:10:54,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 09:10:54,165 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 33 [2020-10-28 09:10:54,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:10:54,165 INFO L225 Difference]: With dead ends: 64 [2020-10-28 09:10:54,165 INFO L226 Difference]: Without dead ends: 44 [2020-10-28 09:10:54,166 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-28 09:10:54,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-28 09:10:54,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 38. [2020-10-28 09:10:54,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-28 09:10:54,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2020-10-28 09:10:54,171 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 33 [2020-10-28 09:10:54,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:10:54,171 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2020-10-28 09:10:54,171 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 09:10:54,172 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2020-10-28 09:10:54,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-28 09:10:54,172 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:10:54,172 INFO L422 BasicCegarLoop]: trace histogram [11, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:10:54,172 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-28 09:10:54,172 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:10:54,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:10:54,173 INFO L82 PathProgramCache]: Analyzing trace with hash 816384820, now seen corresponding path program 15 times [2020-10-28 09:10:54,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:10:54,173 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [81208911] [2020-10-28 09:10:54,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:10:54,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:10:54,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:54,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:54,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:57,470 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:10:57,471 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-28 09:10:57,471 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:10:57,471 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3284 [2020-10-28 09:10:57,471 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:10:57,471 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:10:57,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 09:10:57,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-28 09:10:57,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-28 09:10:57,472 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:10:57,573 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:10:57,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:10:57,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:57,579 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:10:57,580 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:10:57,580 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:10:57,580 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:10:57,580 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:10:57,580 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:10:57,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:10:57,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:10:57,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:10:57,581 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:10:57,586 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2020-10-28 09:10:57,586 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [81208911] [2020-10-28 09:10:57,586 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:10:57,586 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 09:10:57,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196245883] [2020-10-28 09:10:57,588 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 09:10:57,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:10:57,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 09:10:57,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-28 09:10:57,593 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand 10 states. [2020-10-28 09:10:57,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:10:57,758 INFO L93 Difference]: Finished difference Result 72 states and 82 transitions. [2020-10-28 09:10:57,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 09:10:57,759 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 34 [2020-10-28 09:10:57,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:10:57,760 INFO L225 Difference]: With dead ends: 72 [2020-10-28 09:10:57,760 INFO L226 Difference]: Without dead ends: 60 [2020-10-28 09:10:57,760 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-28 09:10:57,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-28 09:10:57,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 39. [2020-10-28 09:10:57,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-28 09:10:57,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2020-10-28 09:10:57,769 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 34 [2020-10-28 09:10:57,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:10:57,770 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2020-10-28 09:10:57,770 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 09:10:57,770 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2020-10-28 09:10:57,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-28 09:10:57,770 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:10:57,771 INFO L422 BasicCegarLoop]: trace histogram [11, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:10:57,771 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-28 09:10:57,771 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:10:57,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:10:57,772 INFO L82 PathProgramCache]: Analyzing trace with hash -913951903, now seen corresponding path program 16 times [2020-10-28 09:10:57,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:10:57,775 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [926513816] [2020-10-28 09:10:57,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:10:57,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:10:57,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:57,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:58,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:01,126 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:11:01,126 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-28 09:11:01,127 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:11:01,127 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3333 [2020-10-28 09:11:01,127 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:11:01,127 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:11:01,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 09:11:01,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:11:01,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-28 09:11:01,127 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:11:01,557 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:11:01,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:11:01,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:01,564 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:11:01,564 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:11:01,564 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:11:01,564 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:11:01,564 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:11:01,564 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:11:01,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:11:01,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:11:01,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:11:01,565 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:11:01,576 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 6 proven. 22 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2020-10-28 09:11:01,576 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [926513816] [2020-10-28 09:11:01,576 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:11:01,576 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-28 09:11:01,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481443153] [2020-10-28 09:11:01,577 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-28 09:11:01,577 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:11:01,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-28 09:11:01,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2020-10-28 09:11:01,578 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand 16 states. [2020-10-28 09:11:01,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:11:01,921 INFO L93 Difference]: Finished difference Result 50 states and 52 transitions. [2020-10-28 09:11:01,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-28 09:11:01,921 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 35 [2020-10-28 09:11:01,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:11:01,922 INFO L225 Difference]: With dead ends: 50 [2020-10-28 09:11:01,923 INFO L226 Difference]: Without dead ends: 46 [2020-10-28 09:11:01,923 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2020-10-28 09:11:01,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-28 09:11:01,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2020-10-28 09:11:01,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-28 09:11:01,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2020-10-28 09:11:01,932 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 35 [2020-10-28 09:11:01,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:11:01,932 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2020-10-28 09:11:01,932 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-28 09:11:01,932 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2020-10-28 09:11:01,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-28 09:11:01,934 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:11:01,934 INFO L422 BasicCegarLoop]: trace histogram [11, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:11:01,934 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-28 09:11:01,934 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:11:01,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:11:01,934 INFO L82 PathProgramCache]: Analyzing trace with hash -574782445, now seen corresponding path program 1 times [2020-10-28 09:11:01,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:11:01,936 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1760224827] [2020-10-28 09:11:01,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:11:01,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:11:01,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:01,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:02,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:06,955 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:11:06,955 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-28 09:11:06,955 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:11:06,956 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-28 09:11:06,956 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:11:06,956 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:11:06,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-28 09:11:06,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:11:06,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-28 09:11:06,957 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:11:07,122 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:11:07,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:11:07,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:07,126 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:11:07,126 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:11:07,126 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:11:07,127 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:11:07,127 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:11:07,127 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:11:07,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:11:07,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:11:07,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:11:07,128 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:11:07,129 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-28 09:11:07,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:11:07,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:07,132 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:11:07,132 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:11:07,132 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:11:07,132 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:11:07,132 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:11:07,133 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:11:07,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:11:07,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:11:07,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:11:07,133 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:11:07,136 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 2 proven. 66 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-10-28 09:11:07,136 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1760224827] [2020-10-28 09:11:07,137 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:11:07,137 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-28 09:11:07,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039834504] [2020-10-28 09:11:07,137 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-28 09:11:07,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:11:07,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-28 09:11:07,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-28 09:11:07,138 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand 15 states. [2020-10-28 09:11:07,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:11:07,315 INFO L93 Difference]: Finished difference Result 77 states and 82 transitions. [2020-10-28 09:11:07,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-28 09:11:07,316 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 42 [2020-10-28 09:11:07,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:11:07,317 INFO L225 Difference]: With dead ends: 77 [2020-10-28 09:11:07,317 INFO L226 Difference]: Without dead ends: 50 [2020-10-28 09:11:07,318 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-28 09:11:07,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-28 09:11:07,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 46. [2020-10-28 09:11:07,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-28 09:11:07,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 48 transitions. [2020-10-28 09:11:07,333 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 48 transitions. Word has length 42 [2020-10-28 09:11:07,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:11:07,334 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 48 transitions. [2020-10-28 09:11:07,334 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-28 09:11:07,334 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 48 transitions. [2020-10-28 09:11:07,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-28 09:11:07,334 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:11:07,335 INFO L422 BasicCegarLoop]: trace histogram [12, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:11:07,335 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-28 09:11:07,335 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:11:07,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:11:07,339 INFO L82 PathProgramCache]: Analyzing trace with hash 427622817, now seen corresponding path program 2 times [2020-10-28 09:11:07,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:11:07,340 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [201074431] [2020-10-28 09:11:07,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:11:07,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:11:07,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:07,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:07,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:12,245 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:11:12,245 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-28 09:11:12,245 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:11:12,245 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4889 [2020-10-28 09:11:12,246 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:11:12,246 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:11:12,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 09:11:12,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:11:12,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-28 09:11:12,246 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:11:12,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:11:12,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:11:12,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:12,439 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:11:12,440 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:11:12,440 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:11:12,440 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:11:12,440 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:11:12,440 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:11:12,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:11:12,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:11:12,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:11:12,441 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:11:12,442 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-10-28 09:11:12,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:11:12,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:12,444 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:11:12,445 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:11:12,445 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:11:12,445 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:11:12,445 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:11:12,445 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:11:12,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:11:12,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:11:12,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:11:12,446 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:11:12,449 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 2 proven. 78 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-10-28 09:11:12,449 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [201074431] [2020-10-28 09:11:12,449 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:11:12,449 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-28 09:11:12,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312991215] [2020-10-28 09:11:12,450 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-28 09:11:12,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:11:12,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-28 09:11:12,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-28 09:11:12,451 INFO L87 Difference]: Start difference. First operand 46 states and 48 transitions. Second operand 16 states. [2020-10-28 09:11:12,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:11:12,587 INFO L93 Difference]: Finished difference Result 78 states and 83 transitions. [2020-10-28 09:11:12,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-28 09:11:12,588 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 43 [2020-10-28 09:11:12,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:11:12,589 INFO L225 Difference]: With dead ends: 78 [2020-10-28 09:11:12,589 INFO L226 Difference]: Without dead ends: 51 [2020-10-28 09:11:12,589 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-28 09:11:12,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-28 09:11:12,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 47. [2020-10-28 09:11:12,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-28 09:11:12,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 49 transitions. [2020-10-28 09:11:12,599 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 49 transitions. Word has length 43 [2020-10-28 09:11:12,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:11:12,599 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 49 transitions. [2020-10-28 09:11:12,600 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-28 09:11:12,600 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 49 transitions. [2020-10-28 09:11:12,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-28 09:11:12,600 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:11:12,600 INFO L422 BasicCegarLoop]: trace histogram [13, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:11:12,600 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-28 09:11:12,601 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:11:12,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:11:12,601 INFO L82 PathProgramCache]: Analyzing trace with hash 1437414867, now seen corresponding path program 3 times [2020-10-28 09:11:12,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:11:12,601 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [635053146] [2020-10-28 09:11:12,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:11:12,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:11:12,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:12,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:13,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:17,379 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:11:17,379 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-28 09:11:17,379 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:11:17,379 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4761 [2020-10-28 09:11:17,379 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:11:17,379 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:11:17,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 09:11:17,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-28 09:11:17,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-28 09:11:17,380 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:11:17,486 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:11:17,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:11:17,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:17,491 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:11:17,492 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:11:17,492 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:11:17,492 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:11:17,492 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:11:17,492 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:11:17,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:11:17,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:11:17,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:11:17,493 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:11:17,495 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-10-28 09:11:17,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:11:17,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:17,497 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:11:17,498 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:11:17,498 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:11:17,498 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:11:17,498 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:11:17,498 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:11:17,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:11:17,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:11:17,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:11:17,499 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:11:17,503 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2020-10-28 09:11:17,505 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [635053146] [2020-10-28 09:11:17,505 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:11:17,505 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 09:11:17,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516686219] [2020-10-28 09:11:17,506 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 09:11:17,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:11:17,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 09:11:17,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-28 09:11:17,507 INFO L87 Difference]: Start difference. First operand 47 states and 49 transitions. Second operand 11 states. [2020-10-28 09:11:17,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:11:17,706 INFO L93 Difference]: Finished difference Result 88 states and 98 transitions. [2020-10-28 09:11:17,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 09:11:17,707 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 44 [2020-10-28 09:11:17,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:11:17,709 INFO L225 Difference]: With dead ends: 88 [2020-10-28 09:11:17,709 INFO L226 Difference]: Without dead ends: 70 [2020-10-28 09:11:17,709 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-28 09:11:17,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-28 09:11:17,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 48. [2020-10-28 09:11:17,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-28 09:11:17,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 50 transitions. [2020-10-28 09:11:17,722 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 50 transitions. Word has length 44 [2020-10-28 09:11:17,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:11:17,723 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 50 transitions. [2020-10-28 09:11:17,723 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 09:11:17,723 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 50 transitions. [2020-10-28 09:11:17,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-28 09:11:17,724 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:11:17,724 INFO L422 BasicCegarLoop]: trace histogram [13, 8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:11:17,724 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-28 09:11:17,725 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:11:17,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:11:17,725 INFO L82 PathProgramCache]: Analyzing trace with hash -1862224512, now seen corresponding path program 4 times [2020-10-28 09:11:17,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:11:17,725 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [542166696] [2020-10-28 09:11:17,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:11:17,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:11:17,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:17,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:18,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:22,743 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:11:22,744 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-28 09:11:22,744 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:11:22,744 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-28 09:11:22,744 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:11:22,744 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:11:22,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-28 09:11:22,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:11:22,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-28 09:11:22,745 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:11:23,143 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:11:23,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:11:23,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:23,149 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:11:23,149 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:11:23,149 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:11:23,149 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:11:23,149 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:11:23,149 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:11:23,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:11:23,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:11:23,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:11:23,150 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:11:23,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-10-28 09:11:23,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:11:23,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:23,156 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:11:23,156 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:11:23,157 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:11:23,157 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:11:23,157 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:11:23,157 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:11:23,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 09:11:23,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:11:23,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 09:11:23,158 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:11:23,167 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 12 proven. 28 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2020-10-28 09:11:23,167 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [542166696] [2020-10-28 09:11:23,168 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:11:23,168 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-28 09:11:23,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160756170] [2020-10-28 09:11:23,168 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-28 09:11:23,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:11:23,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-28 09:11:23,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2020-10-28 09:11:23,169 INFO L87 Difference]: Start difference. First operand 48 states and 50 transitions. Second operand 18 states. [2020-10-28 09:11:23,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:11:23,855 INFO L93 Difference]: Finished difference Result 72 states and 78 transitions. [2020-10-28 09:11:23,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-28 09:11:23,858 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 45 [2020-10-28 09:11:23,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:11:23,859 INFO L225 Difference]: With dead ends: 72 [2020-10-28 09:11:23,859 INFO L226 Difference]: Without dead ends: 68 [2020-10-28 09:11:23,859 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2020-10-28 09:11:23,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-28 09:11:23,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 55. [2020-10-28 09:11:23,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-28 09:11:23,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 57 transitions. [2020-10-28 09:11:23,867 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 57 transitions. Word has length 45 [2020-10-28 09:11:23,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:11:23,868 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 57 transitions. [2020-10-28 09:11:23,868 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-28 09:11:23,868 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 57 transitions. [2020-10-28 09:11:23,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-28 09:11:23,869 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:11:23,869 INFO L422 BasicCegarLoop]: trace histogram [13, 8, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:11:23,869 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-28 09:11:23,869 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:11:23,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:11:23,870 INFO L82 PathProgramCache]: Analyzing trace with hash -2045693676, now seen corresponding path program 5 times [2020-10-28 09:11:23,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:11:23,870 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [585983464] [2020-10-28 09:11:23,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:11:23,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:11:23,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:23,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:25,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:28,496 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:11:28,496 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-28 09:11:28,496 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:11:28,496 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4609 [2020-10-28 09:11:28,496 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:11:28,496 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:11:28,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-28 09:11:28,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:11:28,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-28 09:11:28,497 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:11:28,707 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:11:28,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:11:28,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:28,712 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:11:28,713 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:11:28,713 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:11:28,713 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:11:28,713 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:11:28,713 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:11:28,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:11:28,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:11:28,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:11:28,714 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:11:28,716 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-10-28 09:11:28,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:11:28,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:28,718 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:11:28,718 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:11:28,718 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:11:28,718 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:11:28,718 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:11:28,719 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:11:28,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:11:28,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:11:28,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:11:28,719 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:11:28,720 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-10-28 09:11:28,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:11:28,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:28,722 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:11:28,722 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:11:28,722 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:11:28,723 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:11:28,723 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:11:28,723 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:11:28,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:11:28,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:11:28,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:11:28,723 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:11:28,727 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 4 proven. 91 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2020-10-28 09:11:28,727 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [585983464] [2020-10-28 09:11:28,728 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:11:28,728 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-28 09:11:28,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769854894] [2020-10-28 09:11:28,728 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-28 09:11:28,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:11:28,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-28 09:11:28,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-28 09:11:28,729 INFO L87 Difference]: Start difference. First operand 55 states and 57 transitions. Second operand 17 states. [2020-10-28 09:11:28,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:11:28,965 INFO L93 Difference]: Finished difference Result 92 states and 96 transitions. [2020-10-28 09:11:28,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-28 09:11:28,967 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 52 [2020-10-28 09:11:28,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:11:28,968 INFO L225 Difference]: With dead ends: 92 [2020-10-28 09:11:28,968 INFO L226 Difference]: Without dead ends: 57 [2020-10-28 09:11:28,968 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-28 09:11:28,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-28 09:11:28,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 56. [2020-10-28 09:11:28,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-28 09:11:28,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 58 transitions. [2020-10-28 09:11:28,976 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 58 transitions. Word has length 52 [2020-10-28 09:11:28,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:11:28,976 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 58 transitions. [2020-10-28 09:11:28,977 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-28 09:11:28,977 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 58 transitions. [2020-10-28 09:11:28,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-28 09:11:28,977 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:11:28,977 INFO L422 BasicCegarLoop]: trace histogram [14, 8, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:11:28,978 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-28 09:11:28,978 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:11:28,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:11:28,978 INFO L82 PathProgramCache]: Analyzing trace with hash -1590455006, now seen corresponding path program 6 times [2020-10-28 09:11:28,978 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:11:28,978 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1216540379] [2020-10-28 09:11:28,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:11:28,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:11:29,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:29,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:31,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:33,996 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:11:33,997 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-28 09:11:33,997 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:11:33,997 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-28 09:11:33,997 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:11:33,997 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:11:33,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-28 09:11:33,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:11:33,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 09:11:33,998 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:11:34,258 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:11:34,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:11:34,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:34,264 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:11:34,264 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:11:34,264 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:11:34,265 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:11:34,265 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:11:34,265 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:11:34,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:11:34,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:11:34,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:11:34,266 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:11:34,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-10-28 09:11:34,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:11:34,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:34,270 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:11:34,270 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:11:34,270 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:11:34,270 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:11:34,271 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:11:34,271 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:11:34,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:11:34,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:11:34,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:11:34,271 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:11:34,273 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-10-28 09:11:34,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:11:34,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:34,275 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:11:34,275 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:11:34,275 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:11:34,275 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:11:34,276 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:11:34,276 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:11:34,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:11:34,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:11:34,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:11:34,276 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:11:34,280 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 4 proven. 105 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2020-10-28 09:11:34,281 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1216540379] [2020-10-28 09:11:34,281 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:11:34,281 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-28 09:11:34,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18610084] [2020-10-28 09:11:34,281 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-28 09:11:34,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:11:34,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-28 09:11:34,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-28 09:11:34,283 INFO L87 Difference]: Start difference. First operand 56 states and 58 transitions. Second operand 18 states. [2020-10-28 09:11:34,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:11:34,553 INFO L93 Difference]: Finished difference Result 93 states and 97 transitions. [2020-10-28 09:11:34,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-28 09:11:34,554 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 53 [2020-10-28 09:11:34,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:11:34,554 INFO L225 Difference]: With dead ends: 93 [2020-10-28 09:11:34,554 INFO L226 Difference]: Without dead ends: 58 [2020-10-28 09:11:34,555 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-28 09:11:34,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-28 09:11:34,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2020-10-28 09:11:34,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-28 09:11:34,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 59 transitions. [2020-10-28 09:11:34,564 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 59 transitions. Word has length 53 [2020-10-28 09:11:34,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:11:34,564 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 59 transitions. [2020-10-28 09:11:34,564 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-28 09:11:34,564 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 59 transitions. [2020-10-28 09:11:34,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-28 09:11:34,565 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:11:34,565 INFO L422 BasicCegarLoop]: trace histogram [15, 8, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:11:34,565 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-28 09:11:34,566 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:11:34,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:11:34,566 INFO L82 PathProgramCache]: Analyzing trace with hash -362958124, now seen corresponding path program 7 times [2020-10-28 09:11:34,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:11:34,566 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [844210907] [2020-10-28 09:11:34,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:11:34,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:11:34,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:34,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:36,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:39,589 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:11:39,590 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-28 09:11:39,590 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:11:39,590 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-28 09:11:39,590 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:11:39,590 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:11:39,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 09:11:39,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-28 09:11:39,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-28 09:11:39,590 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:11:39,716 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:11:39,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:11:39,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:39,722 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:11:39,723 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:11:39,723 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:11:39,723 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:11:39,723 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:11:39,724 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:11:39,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:11:39,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:11:39,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:11:39,725 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:11:39,727 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-10-28 09:11:39,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:11:39,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:39,729 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:11:39,730 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:11:39,730 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:11:39,730 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:11:39,730 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:11:39,731 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:11:39,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:11:39,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:11:39,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:11:39,732 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:11:39,734 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-10-28 09:11:39,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:11:39,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:39,737 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:11:39,738 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:11:39,738 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:11:39,738 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:11:39,739 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:11:39,740 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:11:39,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:11:39,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:11:39,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:11:39,741 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:11:39,744 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 4 proven. 36 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2020-10-28 09:11:39,745 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [844210907] [2020-10-28 09:11:39,745 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:11:39,745 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 09:11:39,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6025673] [2020-10-28 09:11:39,747 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 09:11:39,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:11:39,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 09:11:39,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-28 09:11:39,748 INFO L87 Difference]: Start difference. First operand 57 states and 59 transitions. Second operand 12 states. [2020-10-28 09:11:40,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:11:40,047 INFO L93 Difference]: Finished difference Result 105 states and 115 transitions. [2020-10-28 09:11:40,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 09:11:40,048 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 54 [2020-10-28 09:11:40,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:11:40,049 INFO L225 Difference]: With dead ends: 105 [2020-10-28 09:11:40,049 INFO L226 Difference]: Without dead ends: 80 [2020-10-28 09:11:40,050 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-28 09:11:40,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-28 09:11:40,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 58. [2020-10-28 09:11:40,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-28 09:11:40,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 60 transitions. [2020-10-28 09:11:40,063 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 60 transitions. Word has length 54 [2020-10-28 09:11:40,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:11:40,063 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 60 transitions. [2020-10-28 09:11:40,063 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 09:11:40,063 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 60 transitions. [2020-10-28 09:11:40,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-28 09:11:40,064 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:11:40,064 INFO L422 BasicCegarLoop]: trace histogram [15, 9, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:11:40,064 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-28 09:11:40,064 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:11:40,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:11:40,065 INFO L82 PathProgramCache]: Analyzing trace with hash 150497793, now seen corresponding path program 8 times [2020-10-28 09:11:40,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:11:40,065 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1959453067] [2020-10-28 09:11:40,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:11:40,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:11:40,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:40,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:42,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:45,088 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:11:45,088 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-28 09:11:45,088 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:11:45,089 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-28 09:11:45,089 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:11:45,089 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:11:45,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-28 09:11:45,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:11:45,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-28 09:11:45,089 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:11:45,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:11:45,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:11:45,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:45,335 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:11:45,335 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:11:45,335 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:11:45,335 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:11:45,336 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:11:45,336 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:11:45,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:11:45,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:11:45,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:11:45,337 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:11:45,338 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-10-28 09:11:45,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:11:45,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:45,341 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:11:45,341 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:11:45,341 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:11:45,342 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:11:45,342 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:11:45,342 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:11:45,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:11:45,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:11:45,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:11:45,343 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:11:45,344 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-10-28 09:11:45,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:11:45,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:45,347 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:11:45,348 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:11:45,348 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:11:45,348 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:11:45,348 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:11:45,348 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:11:45,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:11:45,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:11:45,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:11:45,349 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:11:45,356 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 4 proven. 120 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2020-10-28 09:11:45,356 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1959453067] [2020-10-28 09:11:45,356 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:11:45,356 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-28 09:11:45,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746653796] [2020-10-28 09:11:45,358 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-28 09:11:45,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:11:45,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-28 09:11:45,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-28 09:11:45,359 INFO L87 Difference]: Start difference. First operand 58 states and 60 transitions. Second operand 19 states. [2020-10-28 09:11:45,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:11:45,527 INFO L93 Difference]: Finished difference Result 96 states and 100 transitions. [2020-10-28 09:11:45,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-28 09:11:45,527 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 55 [2020-10-28 09:11:45,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:11:45,528 INFO L225 Difference]: With dead ends: 96 [2020-10-28 09:11:45,528 INFO L226 Difference]: Without dead ends: 60 [2020-10-28 09:11:45,529 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-28 09:11:45,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-28 09:11:45,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2020-10-28 09:11:45,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-28 09:11:45,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 61 transitions. [2020-10-28 09:11:45,540 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 61 transitions. Word has length 55 [2020-10-28 09:11:45,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:11:45,540 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 61 transitions. [2020-10-28 09:11:45,540 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-28 09:11:45,541 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 61 transitions. [2020-10-28 09:11:45,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-28 09:11:45,545 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:11:45,545 INFO L422 BasicCegarLoop]: trace histogram [16, 9, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:11:45,546 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-28 09:11:45,546 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:11:45,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:11:45,546 INFO L82 PathProgramCache]: Analyzing trace with hash -1341005005, now seen corresponding path program 9 times [2020-10-28 09:11:45,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:11:45,547 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2129296830] [2020-10-28 09:11:45,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:11:45,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:11:45,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:45,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:48,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:50,572 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:11:50,572 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-28 09:11:50,572 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:11:50,572 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-28 09:11:50,572 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:11:50,572 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:11:50,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 09:11:50,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-28 09:11:50,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-28 09:11:50,573 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:11:50,704 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:11:50,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:11:50,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:50,708 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:11:50,708 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:11:50,709 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:11:50,709 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:11:50,709 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:11:50,709 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:11:50,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:11:50,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:11:50,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:11:50,709 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:11:50,710 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-10-28 09:11:50,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:11:50,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:50,712 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:11:50,712 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:11:50,712 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:11:50,712 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:11:50,713 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:11:50,713 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:11:50,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:11:50,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:11:50,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:11:50,713 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:11:50,714 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-10-28 09:11:50,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:11:50,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:50,715 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:11:50,715 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:11:50,715 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:11:50,716 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:11:50,716 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:11:50,716 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:11:50,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:11:50,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:11:50,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:11:50,716 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:11:50,720 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 4 proven. 45 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2020-10-28 09:11:50,720 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2129296830] [2020-10-28 09:11:50,720 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:11:50,720 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 09:11:50,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794094125] [2020-10-28 09:11:50,721 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 09:11:50,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:11:50,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 09:11:50,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-28 09:11:50,722 INFO L87 Difference]: Start difference. First operand 59 states and 61 transitions. Second operand 13 states. [2020-10-28 09:11:50,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:11:50,981 INFO L93 Difference]: Finished difference Result 110 states and 121 transitions. [2020-10-28 09:11:50,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 09:11:50,982 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 56 [2020-10-28 09:11:50,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:11:50,983 INFO L225 Difference]: With dead ends: 110 [2020-10-28 09:11:50,983 INFO L226 Difference]: Without dead ends: 85 [2020-10-28 09:11:50,984 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-28 09:11:50,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-28 09:11:50,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 60. [2020-10-28 09:11:50,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-28 09:11:50,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2020-10-28 09:11:50,994 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 56 [2020-10-28 09:11:50,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:11:50,995 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2020-10-28 09:11:50,995 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 09:11:50,995 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2020-10-28 09:11:50,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-28 09:11:50,996 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:11:50,996 INFO L422 BasicCegarLoop]: trace histogram [16, 10, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:11:50,996 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-28 09:11:50,996 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:11:50,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:11:50,996 INFO L82 PathProgramCache]: Analyzing trace with hash -104184446, now seen corresponding path program 10 times [2020-10-28 09:11:50,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:11:50,997 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1413734027] [2020-10-28 09:11:50,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:11:51,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:11:51,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:51,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:54,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:56,023 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:11:56,023 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-28 09:11:56,023 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:11:56,024 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-28 09:11:56,024 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:11:56,024 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:11:56,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-28 09:11:56,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:11:56,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-28 09:11:56,024 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:11:56,511 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:11:56,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:11:56,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:56,522 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:11:56,523 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:11:56,523 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:11:56,523 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 09:11:56,523 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:11:56,523 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:11:56,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:11:56,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:11:56,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:11:56,524 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:11:56,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-10-28 09:11:56,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:11:56,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:56,530 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:11:56,530 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:11:56,530 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:11:56,530 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:11:56,530 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:11:56,530 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:11:56,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 09:11:56,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:11:56,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 09:11:56,531 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:11:56,532 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-10-28 09:11:56,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:11:56,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:56,537 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:11:56,537 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:11:56,537 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:11:56,537 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:11:56,538 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:11:56,538 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:11:56,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 09:11:56,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:11:56,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 09:11:56,538 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:11:56,552 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 19 proven. 47 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2020-10-28 09:11:56,552 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1413734027] [2020-10-28 09:11:56,552 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:11:56,552 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-28 09:11:56,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114052193] [2020-10-28 09:11:56,553 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-28 09:11:56,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:11:56,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-28 09:11:56,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2020-10-28 09:11:56,555 INFO L87 Difference]: Start difference. First operand 60 states and 62 transitions. Second operand 21 states. [2020-10-28 09:11:57,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:11:57,476 INFO L93 Difference]: Finished difference Result 87 states and 94 transitions. [2020-10-28 09:11:57,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-28 09:11:57,477 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 57 [2020-10-28 09:11:57,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:11:57,478 INFO L225 Difference]: With dead ends: 87 [2020-10-28 09:11:57,478 INFO L226 Difference]: Without dead ends: 83 [2020-10-28 09:11:57,480 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=108, Invalid=648, Unknown=0, NotChecked=0, Total=756 [2020-10-28 09:11:57,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-28 09:11:57,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 67. [2020-10-28 09:11:57,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-28 09:11:57,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 69 transitions. [2020-10-28 09:11:57,492 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 69 transitions. Word has length 57 [2020-10-28 09:11:57,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:11:57,492 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 69 transitions. [2020-10-28 09:11:57,492 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-28 09:11:57,492 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 69 transitions. [2020-10-28 09:11:57,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-28 09:11:57,493 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:11:57,493 INFO L422 BasicCegarLoop]: trace histogram [16, 10, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:11:57,493 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-28 09:11:57,493 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:11:57,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:11:57,494 INFO L82 PathProgramCache]: Analyzing trace with hash -769131822, now seen corresponding path program 11 times [2020-10-28 09:11:57,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:11:57,494 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1757328702] [2020-10-28 09:11:57,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:11:57,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:11:57,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:57,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:12:01,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:12:02,520 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:12:02,520 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-28 09:12:02,521 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:12:02,521 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-28 09:12:02,521 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:12:02,521 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:12:02,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-28 09:12:02,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:12:02,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-28 09:12:02,521 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:12:02,795 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:12:02,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:12:02,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:12:02,799 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:12:02,799 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:12:02,799 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:12:02,799 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:12:02,799 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:12:02,799 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:12:02,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:12:02,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:12:02,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:12:02,800 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:12:02,801 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-10-28 09:12:02,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:12:02,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:12:02,802 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:12:02,803 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:12:02,803 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:12:02,803 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:12:02,803 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:12:02,803 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:12:02,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:12:02,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:12:02,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:12:02,804 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:12:02,804 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-10-28 09:12:02,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:12:02,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:12:02,806 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:12:02,807 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:12:02,807 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:12:02,807 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:12:02,807 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:12:02,807 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:12:02,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:12:02,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:12:02,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:12:02,808 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:12:02,808 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-10-28 09:12:02,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:12:02,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:12:02,810 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:12:02,810 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:12:02,810 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:12:02,810 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:12:02,810 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:12:02,810 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:12:02,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:12:02,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:12:02,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:12:02,811 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:12:02,814 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 6 proven. 136 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2020-10-28 09:12:02,814 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1757328702] [2020-10-28 09:12:02,814 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:12:02,814 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-28 09:12:02,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82171470] [2020-10-28 09:12:02,815 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-28 09:12:02,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:12:02,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-28 09:12:02,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-28 09:12:02,816 INFO L87 Difference]: Start difference. First operand 67 states and 69 transitions. Second operand 20 states. [2020-10-28 09:12:03,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:12:03,065 INFO L93 Difference]: Finished difference Result 112 states and 116 transitions. [2020-10-28 09:12:03,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-28 09:12:03,066 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 64 [2020-10-28 09:12:03,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:12:03,069 INFO L225 Difference]: With dead ends: 112 [2020-10-28 09:12:03,069 INFO L226 Difference]: Without dead ends: 68 [2020-10-28 09:12:03,070 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-28 09:12:03,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-28 09:12:03,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2020-10-28 09:12:03,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-28 09:12:03,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 70 transitions. [2020-10-28 09:12:03,080 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 70 transitions. Word has length 64 [2020-10-28 09:12:03,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:12:03,080 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 70 transitions. [2020-10-28 09:12:03,080 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-28 09:12:03,080 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 70 transitions. [2020-10-28 09:12:03,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-28 09:12:03,081 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:12:03,081 INFO L422 BasicCegarLoop]: trace histogram [17, 10, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:12:03,081 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-28 09:12:03,081 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:12:03,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:12:03,082 INFO L82 PathProgramCache]: Analyzing trace with hash -2080458272, now seen corresponding path program 12 times [2020-10-28 09:12:03,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:12:03,082 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [99388526] [2020-10-28 09:12:03,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:12:03,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:12:03,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:12:03,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:12:07,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:12:08,107 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:12:08,107 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-28 09:12:08,108 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:12:08,108 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-28 09:12:08,108 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:12:08,108 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:12:08,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-28 09:12:08,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:12:08,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-28 09:12:08,108 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:12:08,402 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:12:08,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:12:08,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:12:08,406 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:12:08,407 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:12:08,407 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:12:08,407 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:12:08,407 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:12:08,407 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:12:08,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:12:08,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:12:08,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:12:08,408 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:12:08,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-10-28 09:12:08,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:12:08,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:12:08,411 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:12:08,411 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:12:08,411 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:12:08,411 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:12:08,411 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:12:08,411 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:12:08,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:12:08,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:12:08,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:12:08,412 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:12:08,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-10-28 09:12:08,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:12:08,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:12:08,415 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:12:08,415 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:12:08,415 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:12:08,415 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:12:08,415 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:12:08,416 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:12:08,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:12:08,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:12:08,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:12:08,416 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:12:08,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2020-10-28 09:12:08,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:12:08,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:12:08,419 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:12:08,419 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:12:08,419 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:12:08,419 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:12:08,419 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:12:08,419 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:12:08,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:12:08,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:12:08,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:12:08,420 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:12:08,423 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 6 proven. 153 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2020-10-28 09:12:08,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [99388526] [2020-10-28 09:12:08,423 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:12:08,423 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-28 09:12:08,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313668010] [2020-10-28 09:12:08,424 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-28 09:12:08,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:12:08,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-28 09:12:08,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-28 09:12:08,425 INFO L87 Difference]: Start difference. First operand 68 states and 70 transitions. Second operand 21 states. [2020-10-28 09:12:08,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:12:08,656 INFO L93 Difference]: Finished difference Result 113 states and 117 transitions. [2020-10-28 09:12:08,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-28 09:12:08,656 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 65 [2020-10-28 09:12:08,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:12:08,657 INFO L225 Difference]: With dead ends: 113 [2020-10-28 09:12:08,657 INFO L226 Difference]: Without dead ends: 69 [2020-10-28 09:12:08,657 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-28 09:12:08,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-28 09:12:08,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2020-10-28 09:12:08,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-28 09:12:08,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 71 transitions. [2020-10-28 09:12:08,665 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 71 transitions. Word has length 65 [2020-10-28 09:12:08,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:12:08,666 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 71 transitions. [2020-10-28 09:12:08,666 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-28 09:12:08,666 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 71 transitions. [2020-10-28 09:12:08,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-28 09:12:08,667 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:12:08,667 INFO L422 BasicCegarLoop]: trace histogram [18, 10, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:12:08,667 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-28 09:12:08,667 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:12:08,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:12:08,668 INFO L82 PathProgramCache]: Analyzing trace with hash 218094738, now seen corresponding path program 13 times [2020-10-28 09:12:08,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:12:08,668 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2003680810] [2020-10-28 09:12:08,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:12:08,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:12:08,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:12:08,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:12:13,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:12:13,709 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:12:13,709 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-28 09:12:13,709 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:12:13,709 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-28 09:12:13,709 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:12:13,710 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:12:13,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 09:12:13,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-28 09:12:13,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-28 09:12:13,710 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:12:13,854 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:12:13,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:12:13,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:12:13,859 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:12:13,859 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:12:13,859 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:12:13,859 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:12:13,859 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:12:13,859 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:12:13,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:12:13,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:12:13,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:12:13,860 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:12:13,861 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-10-28 09:12:13,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:12:13,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:12:13,862 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:12:13,862 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:12:13,862 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:12:13,863 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:12:13,863 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:12:13,863 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:12:13,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:12:13,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:12:13,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:12:13,863 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:12:13,864 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-10-28 09:12:13,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:12:13,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:12:13,866 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:12:13,866 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:12:13,866 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:12:13,866 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:12:13,866 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:12:13,866 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:12:13,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:12:13,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:12:13,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:12:13,867 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:12:13,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-10-28 09:12:13,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:12:13,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:12:13,869 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:12:13,869 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:12:13,869 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:12:13,869 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:12:13,869 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:12:13,869 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:12:13,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:12:13,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:12:13,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:12:13,870 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:12:13,873 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2020-10-28 09:12:13,873 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2003680810] [2020-10-28 09:12:13,873 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:12:13,873 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 09:12:13,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803661234] [2020-10-28 09:12:13,874 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 09:12:13,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:12:13,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 09:12:13,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-28 09:12:13,874 INFO L87 Difference]: Start difference. First operand 69 states and 71 transitions. Second operand 14 states. [2020-10-28 09:12:14,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:12:14,194 INFO L93 Difference]: Finished difference Result 127 states and 138 transitions. [2020-10-28 09:12:14,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 09:12:14,194 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 66 [2020-10-28 09:12:14,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:12:14,195 INFO L225 Difference]: With dead ends: 127 [2020-10-28 09:12:14,196 INFO L226 Difference]: Without dead ends: 95 [2020-10-28 09:12:14,196 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-28 09:12:14,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-28 09:12:14,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 70. [2020-10-28 09:12:14,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-28 09:12:14,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 72 transitions. [2020-10-28 09:12:14,207 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 72 transitions. Word has length 66 [2020-10-28 09:12:14,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:12:14,207 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 72 transitions. [2020-10-28 09:12:14,207 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 09:12:14,207 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 72 transitions. [2020-10-28 09:12:14,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-28 09:12:14,208 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:12:14,208 INFO L422 BasicCegarLoop]: trace histogram [18, 11, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:12:14,208 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-28 09:12:14,208 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:12:14,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:12:14,209 INFO L82 PathProgramCache]: Analyzing trace with hash -140446623, now seen corresponding path program 14 times [2020-10-28 09:12:14,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:12:14,210 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1475458392] [2020-10-28 09:12:14,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:12:14,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:12:14,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:12:14,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:12:18,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:12:19,235 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:12:19,235 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-28 09:12:19,235 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:12:19,235 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-28 09:12:19,235 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:12:19,235 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:12:19,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-28 09:12:19,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:12:19,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-28 09:12:19,236 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:12:19,553 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:12:19,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:12:19,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:12:19,558 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:12:19,559 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:12:19,559 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:12:19,559 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:12:19,559 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:12:19,559 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:12:19,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:12:19,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:12:19,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:12:19,559 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:12:19,561 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-10-28 09:12:19,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:12:19,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:12:19,562 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:12:19,562 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:12:19,562 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:12:19,562 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:12:19,562 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:12:19,562 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:12:19,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:12:19,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:12:19,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:12:19,563 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:12:19,563 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-10-28 09:12:19,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:12:19,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:12:19,565 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:12:19,565 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:12:19,565 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:12:19,565 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:12:19,565 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:12:19,566 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:12:19,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:12:19,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:12:19,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:12:19,566 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:12:19,567 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-10-28 09:12:19,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:12:19,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:12:19,568 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:12:19,568 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:12:19,568 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:12:19,568 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:12:19,568 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:12:19,569 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:12:19,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:12:19,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:12:19,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:12:19,569 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:12:19,574 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 6 proven. 171 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2020-10-28 09:12:19,574 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1475458392] [2020-10-28 09:12:19,574 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:12:19,574 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-28 09:12:19,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115295795] [2020-10-28 09:12:19,575 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-28 09:12:19,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:12:19,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-28 09:12:19,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-28 09:12:19,576 INFO L87 Difference]: Start difference. First operand 70 states and 72 transitions. Second operand 22 states. [2020-10-28 09:12:19,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:12:19,825 INFO L93 Difference]: Finished difference Result 116 states and 120 transitions. [2020-10-28 09:12:19,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-28 09:12:19,826 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 67 [2020-10-28 09:12:19,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:12:19,827 INFO L225 Difference]: With dead ends: 116 [2020-10-28 09:12:19,827 INFO L226 Difference]: Without dead ends: 71 [2020-10-28 09:12:19,828 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-28 09:12:19,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-28 09:12:19,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2020-10-28 09:12:19,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-28 09:12:19,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 73 transitions. [2020-10-28 09:12:19,836 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 73 transitions. Word has length 67 [2020-10-28 09:12:19,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:12:19,836 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 73 transitions. [2020-10-28 09:12:19,836 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-28 09:12:19,837 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 73 transitions. [2020-10-28 09:12:19,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-28 09:12:19,837 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:12:19,837 INFO L422 BasicCegarLoop]: trace histogram [19, 11, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:12:19,838 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-28 09:12:19,838 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:12:19,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:12:19,838 INFO L82 PathProgramCache]: Analyzing trace with hash 1155805843, now seen corresponding path program 15 times [2020-10-28 09:12:19,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:12:19,838 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1930353275] [2020-10-28 09:12:19,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:12:19,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:12:19,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:12:19,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:12:24,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:12:24,891 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:12:24,891 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-28 09:12:24,891 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:12:24,891 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5034 [2020-10-28 09:12:24,891 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:12:24,892 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:12:24,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-28 09:12:24,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-28 09:12:24,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-28 09:12:24,892 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:12:25,050 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:12:25,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:12:25,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:12:25,054 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:12:25,054 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:12:25,054 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:12:25,055 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:12:25,055 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:12:25,055 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:12:25,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:12:25,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:12:25,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:12:25,055 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:12:25,057 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-10-28 09:12:25,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:12:25,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:12:25,058 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:12:25,059 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:12:25,059 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:12:25,059 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:12:25,059 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:12:25,059 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:12:25,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:12:25,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:12:25,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:12:25,059 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:12:25,060 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-10-28 09:12:25,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:12:25,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:12:25,061 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:12:25,061 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:12:25,062 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:12:25,062 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:12:25,062 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:12:25,062 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:12:25,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:12:25,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:12:25,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:12:25,062 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:12:25,063 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-10-28 09:12:25,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:12:25,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:12:25,065 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:12:25,065 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:12:25,065 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:12:25,065 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:12:25,065 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:12:25,066 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:12:25,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:12:25,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:12:25,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:12:25,066 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:12:25,069 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 6 proven. 66 refuted. 0 times theorem prover too weak. 217 trivial. 0 not checked. [2020-10-28 09:12:25,069 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1930353275] [2020-10-28 09:12:25,069 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:12:25,070 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-28 09:12:25,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777548863] [2020-10-28 09:12:25,070 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-28 09:12:25,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:12:25,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-28 09:12:25,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-28 09:12:25,071 INFO L87 Difference]: Start difference. First operand 71 states and 73 transitions. Second operand 15 states. [2020-10-28 09:12:25,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:12:25,402 INFO L93 Difference]: Finished difference Result 132 states and 144 transitions. [2020-10-28 09:12:25,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-28 09:12:25,402 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 68 [2020-10-28 09:12:25,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:12:25,404 INFO L225 Difference]: With dead ends: 132 [2020-10-28 09:12:25,404 INFO L226 Difference]: Without dead ends: 100 [2020-10-28 09:12:25,405 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-28 09:12:25,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-28 09:12:25,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 72. [2020-10-28 09:12:25,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-28 09:12:25,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 74 transitions. [2020-10-28 09:12:25,415 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 74 transitions. Word has length 68 [2020-10-28 09:12:25,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:12:25,416 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 74 transitions. [2020-10-28 09:12:25,416 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-28 09:12:25,416 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 74 transitions. [2020-10-28 09:12:25,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-28 09:12:25,416 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:12:25,417 INFO L422 BasicCegarLoop]: trace histogram [19, 12, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:12:25,417 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-28 09:12:25,417 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:12:25,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:12:25,417 INFO L82 PathProgramCache]: Analyzing trace with hash -1136173440, now seen corresponding path program 16 times [2020-10-28 09:12:25,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:12:25,418 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1027252887] [2020-10-28 09:12:25,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:12:25,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:12:25,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:12:25,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:12:30,447 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:12:30,447 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-28 09:12:30,447 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:12:30,447 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-28 09:12:30,448 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:12:30,448 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:12:30,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-28 09:12:30,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:12:30,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-28 09:12:30,448 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:12:30,789 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:12:30,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:12:30,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:12:30,794 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:12:30,794 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:12:30,794 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:12:30,794 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:12:30,794 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:12:30,794 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:12:30,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:12:30,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:12:30,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:12:30,795 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:12:30,796 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-10-28 09:12:30,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:12:30,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:12:30,797 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:12:30,797 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:12:30,797 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:12:30,797 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:12:30,798 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:12:30,798 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:12:30,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:12:30,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:12:30,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:12:30,798 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:12:30,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-10-28 09:12:30,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:12:30,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:12:30,800 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:12:30,800 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:12:30,800 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:12:30,800 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:12:30,800 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:12:30,800 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:12:30,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:12:30,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:12:30,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:12:30,801 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:12:30,802 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-10-28 09:12:30,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:12:30,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:12:30,803 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:12:30,804 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:12:30,804 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:12:30,804 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:12:30,804 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:12:30,804 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:12:30,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:12:30,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:12:30,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:12:30,805 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:12:30,808 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 6 proven. 190 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2020-10-28 09:12:30,809 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1027252887] [2020-10-28 09:12:30,809 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:12:30,809 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-28 09:12:30,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741293815] [2020-10-28 09:12:30,810 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-28 09:12:30,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:12:30,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-28 09:12:30,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-28 09:12:30,811 INFO L87 Difference]: Start difference. First operand 72 states and 74 transitions. Second operand 23 states. [2020-10-28 09:12:30,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:12:30,990 INFO L93 Difference]: Finished difference Result 120 states and 124 transitions. [2020-10-28 09:12:30,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-28 09:12:30,990 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 69 [2020-10-28 09:12:30,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:12:30,991 INFO L225 Difference]: With dead ends: 120 [2020-10-28 09:12:30,991 INFO L226 Difference]: Without dead ends: 74 [2020-10-28 09:12:30,992 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-28 09:12:30,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-28 09:12:31,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2020-10-28 09:12:31,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-28 09:12:31,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 75 transitions. [2020-10-28 09:12:31,001 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 75 transitions. Word has length 69 [2020-10-28 09:12:31,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:12:31,001 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 75 transitions. [2020-10-28 09:12:31,001 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-28 09:12:31,001 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 75 transitions. [2020-10-28 09:12:31,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-28 09:12:31,002 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:12:31,002 INFO L422 BasicCegarLoop]: trace histogram [20, 12, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:12:31,002 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-28 09:12:31,003 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:12:31,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:12:31,003 INFO L82 PathProgramCache]: Analyzing trace with hash -978069454, now seen corresponding path program 17 times [2020-10-28 09:12:31,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:12:31,003 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1554256188] [2020-10-28 09:12:31,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:12:31,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:12:31,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:12:31,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:12:36,026 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:12:36,026 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-28 09:12:36,026 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:12:36,026 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-28 09:12:36,026 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:12:36,026 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:12:36,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-28 09:12:36,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:12:36,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-28 09:12:36,027 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:12:36,401 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:12:36,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:12:36,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:12:36,405 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:12:36,405 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:12:36,405 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:12:36,406 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:12:36,406 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:12:36,406 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:12:36,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:12:36,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:12:36,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:12:36,406 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:12:36,407 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-10-28 09:12:36,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:12:36,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:12:36,409 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:12:36,409 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:12:36,409 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:12:36,409 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:12:36,409 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:12:36,409 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:12:36,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:12:36,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:12:36,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:12:36,410 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:12:36,410 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-10-28 09:12:36,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:12:36,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:12:36,412 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:12:36,412 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:12:36,412 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:12:36,412 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:12:36,412 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:12:36,412 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:12:36,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:12:36,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:12:36,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:12:36,413 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:12:36,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-10-28 09:12:36,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:12:36,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:12:36,415 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:12:36,415 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:12:36,415 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:12:36,415 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:12:36,416 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:12:36,416 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:12:36,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:12:36,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:12:36,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:12:36,416 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:12:36,420 INFO L134 CoverageAnalysis]: Checked inductivity of 321 backedges. 6 proven. 210 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2020-10-28 09:12:36,421 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1554256188] [2020-10-28 09:12:36,421 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:12:36,421 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-28 09:12:36,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273692579] [2020-10-28 09:12:36,422 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-28 09:12:36,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:12:36,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-28 09:12:36,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-28 09:12:36,423 INFO L87 Difference]: Start difference. First operand 73 states and 75 transitions. Second operand 24 states. [2020-10-28 09:12:36,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:12:36,669 INFO L93 Difference]: Finished difference Result 121 states and 125 transitions. [2020-10-28 09:12:36,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-28 09:12:36,670 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 70 [2020-10-28 09:12:36,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:12:36,671 INFO L225 Difference]: With dead ends: 121 [2020-10-28 09:12:36,671 INFO L226 Difference]: Without dead ends: 75 [2020-10-28 09:12:36,672 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-28 09:12:36,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-28 09:12:36,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 74. [2020-10-28 09:12:36,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-28 09:12:36,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 76 transitions. [2020-10-28 09:12:36,681 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 76 transitions. Word has length 70 [2020-10-28 09:12:36,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:12:36,681 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 76 transitions. [2020-10-28 09:12:36,681 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-28 09:12:36,682 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 76 transitions. [2020-10-28 09:12:36,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-28 09:12:36,682 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:12:36,682 INFO L422 BasicCegarLoop]: trace histogram [21, 12, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:12:36,683 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-28 09:12:36,683 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:12:36,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:12:36,686 INFO L82 PathProgramCache]: Analyzing trace with hash -371813184, now seen corresponding path program 18 times [2020-10-28 09:12:36,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:12:36,686 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [155533259] [2020-10-28 09:12:36,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:12:36,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:12:36,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:12:36,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:12:41,708 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:12:41,708 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-28 09:12:41,708 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:12:41,708 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-28 09:12:41,708 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:12:41,708 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:12:41,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 09:12:41,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 34 [2020-10-28 09:12:41,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-28 09:12:41,709 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:12:41,887 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:12:41,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:12:41,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:12:41,892 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:12:41,892 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:12:41,892 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:12:41,892 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:12:41,892 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:12:41,892 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:12:41,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:12:41,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:12:41,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:12:41,893 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:12:41,894 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-10-28 09:12:41,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:12:41,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:12:41,896 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:12:41,896 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:12:41,896 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:12:41,896 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:12:41,896 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:12:41,896 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:12:41,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:12:41,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:12:41,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:12:41,896 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:12:41,897 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-10-28 09:12:41,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:12:41,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:12:41,899 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:12:41,899 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:12:41,899 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:12:41,900 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:12:41,900 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:12:41,900 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:12:41,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:12:41,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:12:41,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:12:41,900 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:12:41,901 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-10-28 09:12:41,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:12:41,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:12:41,903 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:12:41,903 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:12:41,903 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:12:41,904 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:12:41,904 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:12:41,904 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:12:41,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:12:41,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:12:41,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:12:41,904 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:12:41,909 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 6 proven. 78 refuted. 0 times theorem prover too weak. 258 trivial. 0 not checked. [2020-10-28 09:12:41,909 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [155533259] [2020-10-28 09:12:41,910 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:12:41,910 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-28 09:12:41,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48499034] [2020-10-28 09:12:41,910 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-28 09:12:41,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:12:41,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-28 09:12:41,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-28 09:12:41,911 INFO L87 Difference]: Start difference. First operand 74 states and 76 transitions. Second operand 16 states. [2020-10-28 09:12:42,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:12:42,265 INFO L93 Difference]: Finished difference Result 138 states and 151 transitions. [2020-10-28 09:12:42,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-28 09:12:42,265 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 71 [2020-10-28 09:12:42,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:12:42,267 INFO L225 Difference]: With dead ends: 138 [2020-10-28 09:12:42,267 INFO L226 Difference]: Without dead ends: 106 [2020-10-28 09:12:42,268 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-28 09:12:42,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-28 09:12:42,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 75. [2020-10-28 09:12:42,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-28 09:12:42,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 77 transitions. [2020-10-28 09:12:42,280 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 77 transitions. Word has length 71 [2020-10-28 09:12:42,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:12:42,281 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 77 transitions. [2020-10-28 09:12:42,281 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-28 09:12:42,281 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 77 transitions. [2020-10-28 09:12:42,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-28 09:12:42,282 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:12:42,282 INFO L422 BasicCegarLoop]: trace histogram [21, 13, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:12:42,282 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-28 09:12:42,282 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:12:42,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:12:42,283 INFO L82 PathProgramCache]: Analyzing trace with hash -1247723021, now seen corresponding path program 19 times [2020-10-28 09:12:42,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:12:42,283 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1636986268] [2020-10-28 09:12:42,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:12:42,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:12:42,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:12:42,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:12:47,308 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:12:47,308 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-28 09:12:47,308 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:12:47,309 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-28 09:12:47,309 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:12:47,309 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:12:47,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-28 09:12:47,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:12:47,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-28 09:12:47,309 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:12:47,718 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:12:47,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:12:47,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:12:47,723 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:12:47,723 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:12:47,723 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:12:47,723 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:12:47,723 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:12:47,723 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:12:47,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:12:47,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:12:47,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:12:47,724 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:12:47,725 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-10-28 09:12:47,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:12:47,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:12:47,726 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:12:47,726 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:12:47,726 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:12:47,726 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:12:47,727 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:12:47,727 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:12:47,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:12:47,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:12:47,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:12:47,727 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:12:47,728 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2020-10-28 09:12:47,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:12:47,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:12:47,729 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:12:47,729 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:12:47,729 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:12:47,729 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:12:47,730 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:12:47,730 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:12:47,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:12:47,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:12:47,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:12:47,730 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:12:47,731 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-10-28 09:12:47,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:12:47,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:12:47,732 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:12:47,732 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:12:47,732 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:12:47,732 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:12:47,732 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:12:47,732 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:12:47,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:12:47,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:12:47,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:12:47,733 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:12:47,738 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 6 proven. 231 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2020-10-28 09:12:47,738 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1636986268] [2020-10-28 09:12:47,738 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:12:47,738 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-28 09:12:47,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205791880] [2020-10-28 09:12:47,739 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-28 09:12:47,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:12:47,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-28 09:12:47,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-28 09:12:47,740 INFO L87 Difference]: Start difference. First operand 75 states and 77 transitions. Second operand 25 states. [2020-10-28 09:12:47,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:12:47,930 INFO L93 Difference]: Finished difference Result 124 states and 128 transitions. [2020-10-28 09:12:47,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-28 09:12:47,931 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 72 [2020-10-28 09:12:47,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:12:47,932 INFO L225 Difference]: With dead ends: 124 [2020-10-28 09:12:47,932 INFO L226 Difference]: Without dead ends: 77 [2020-10-28 09:12:47,933 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-28 09:12:47,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-28 09:12:47,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 76. [2020-10-28 09:12:47,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-28 09:12:47,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 78 transitions. [2020-10-28 09:12:47,941 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 78 transitions. Word has length 72 [2020-10-28 09:12:47,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:12:47,942 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 78 transitions. [2020-10-28 09:12:47,942 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-28 09:12:47,942 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 78 transitions. [2020-10-28 09:12:47,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-28 09:12:47,943 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:12:47,943 INFO L422 BasicCegarLoop]: trace histogram [22, 13, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:12:47,943 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-28 09:12:47,943 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:12:47,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:12:47,944 INFO L82 PathProgramCache]: Analyzing trace with hash 1543967489, now seen corresponding path program 20 times [2020-10-28 09:12:47,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:12:47,944 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2052729108] [2020-10-28 09:12:47,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:12:47,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:12:47,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:12:48,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:12:52,970 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:12:52,970 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-28 09:12:52,970 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:12:52,970 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-28 09:12:52,970 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:12:52,970 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:12:52,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-28 09:12:52,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:12:52,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-28 09:12:52,971 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:12:53,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:12:53,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:12:53,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:12:53,424 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:12:53,424 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:12:53,424 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:12:53,424 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:12:53,424 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:12:53,424 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:12:53,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:12:53,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:12:53,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:12:53,425 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:12:53,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-10-28 09:12:53,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:12:53,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:12:53,427 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:12:53,427 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:12:53,427 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:12:53,428 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:12:53,428 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:12:53,428 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:12:53,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:12:53,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:12:53,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:12:53,428 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:12:53,429 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-10-28 09:12:53,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:12:53,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:12:53,430 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:12:53,431 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:12:53,431 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:12:53,431 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:12:53,431 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:12:53,431 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:12:53,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:12:53,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:12:53,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:12:53,432 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:12:53,432 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2020-10-28 09:12:53,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:12:53,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:12:53,434 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:12:53,434 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:12:53,434 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:12:53,435 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:12:53,435 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:12:53,435 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:12:53,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:12:53,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:12:53,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:12:53,436 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:12:53,441 INFO L134 CoverageAnalysis]: Checked inductivity of 377 backedges. 6 proven. 253 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2020-10-28 09:12:53,442 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2052729108] [2020-10-28 09:12:53,442 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:12:53,442 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-28 09:12:53,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725650723] [2020-10-28 09:12:53,442 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-28 09:12:53,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:12:53,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-28 09:12:53,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-28 09:12:53,444 INFO L87 Difference]: Start difference. First operand 76 states and 78 transitions. Second operand 26 states. [2020-10-28 09:12:53,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:12:53,755 INFO L93 Difference]: Finished difference Result 125 states and 129 transitions. [2020-10-28 09:12:53,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-28 09:12:53,755 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 73 [2020-10-28 09:12:53,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:12:53,756 INFO L225 Difference]: With dead ends: 125 [2020-10-28 09:12:53,756 INFO L226 Difference]: Without dead ends: 78 [2020-10-28 09:12:53,757 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-28 09:12:53,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-28 09:12:53,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 77. [2020-10-28 09:12:53,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-28 09:12:53,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 79 transitions. [2020-10-28 09:12:53,769 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 79 transitions. Word has length 73 [2020-10-28 09:12:53,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:12:53,769 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 79 transitions. [2020-10-28 09:12:53,769 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-28 09:12:53,769 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 79 transitions. [2020-10-28 09:12:53,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-28 09:12:53,770 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:12:53,770 INFO L422 BasicCegarLoop]: trace histogram [23, 13, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:12:53,770 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-28 09:12:53,770 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:12:53,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:12:53,771 INFO L82 PathProgramCache]: Analyzing trace with hash -2107939917, now seen corresponding path program 21 times [2020-10-28 09:12:53,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:12:53,771 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [195823904] [2020-10-28 09:12:53,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:12:53,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:12:53,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:12:53,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:12:58,824 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:12:58,825 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-28 09:12:58,825 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:12:58,825 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-28 09:12:58,825 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:12:58,825 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:12:58,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-28 09:12:58,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-10-28 09:12:58,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-28 09:12:58,825 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:12:59,030 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:12:59,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:12:59,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:12:59,035 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:12:59,035 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:12:59,036 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:12:59,036 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:12:59,036 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:12:59,036 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:12:59,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:12:59,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:12:59,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:12:59,037 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:12:59,038 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-10-28 09:12:59,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:12:59,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:12:59,041 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:12:59,041 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:12:59,041 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:12:59,041 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:12:59,041 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:12:59,041 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:12:59,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:12:59,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:12:59,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:12:59,042 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:12:59,043 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-10-28 09:12:59,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:12:59,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:12:59,046 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:12:59,046 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:12:59,046 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:12:59,047 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:12:59,047 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:12:59,047 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:12:59,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:12:59,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:12:59,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:12:59,048 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:12:59,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-10-28 09:12:59,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:12:59,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:12:59,053 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:12:59,053 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:12:59,053 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:12:59,053 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:12:59,054 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:12:59,054 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:12:59,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:12:59,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:12:59,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:12:59,054 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:12:59,061 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 6 proven. 91 refuted. 0 times theorem prover too weak. 303 trivial. 0 not checked. [2020-10-28 09:12:59,061 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [195823904] [2020-10-28 09:12:59,061 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:12:59,062 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-28 09:12:59,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791699178] [2020-10-28 09:12:59,062 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-28 09:12:59,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:12:59,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-28 09:12:59,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-28 09:12:59,064 INFO L87 Difference]: Start difference. First operand 77 states and 79 transitions. Second operand 17 states. [2020-10-28 09:12:59,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:12:59,439 INFO L93 Difference]: Finished difference Result 144 states and 158 transitions. [2020-10-28 09:12:59,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-28 09:12:59,440 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 74 [2020-10-28 09:12:59,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:12:59,441 INFO L225 Difference]: With dead ends: 144 [2020-10-28 09:12:59,441 INFO L226 Difference]: Without dead ends: 112 [2020-10-28 09:12:59,442 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-28 09:12:59,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-28 09:12:59,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 78. [2020-10-28 09:12:59,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-28 09:12:59,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 80 transitions. [2020-10-28 09:12:59,464 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 80 transitions. Word has length 74 [2020-10-28 09:12:59,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:12:59,465 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 80 transitions. [2020-10-28 09:12:59,465 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-28 09:12:59,465 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 80 transitions. [2020-10-28 09:12:59,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-28 09:12:59,465 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:12:59,466 INFO L422 BasicCegarLoop]: trace histogram [23, 14, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:12:59,466 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-28 09:12:59,466 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:12:59,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:12:59,466 INFO L82 PathProgramCache]: Analyzing trace with hash 766923104, now seen corresponding path program 22 times [2020-10-28 09:12:59,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:12:59,467 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [55341384] [2020-10-28 09:12:59,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:12:59,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:12:59,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:12:59,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:13:04,505 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:13:04,506 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-28 09:13:04,506 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:13:04,506 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-28 09:13:04,506 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:13:04,506 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:13:04,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-28 09:13:04,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:13:04,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-28 09:13:04,507 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:13:04,974 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:13:04,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:13:04,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:13:04,979 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:13:04,979 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:13:04,979 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:13:04,979 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:13:04,979 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:13:04,979 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:13:04,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:13:04,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:13:04,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:13:04,980 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:13:04,981 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-10-28 09:13:04,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:13:04,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:13:04,984 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:13:04,984 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:13:04,984 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:13:04,984 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:13:04,984 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:13:04,984 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:13:04,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:13:04,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:13:04,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:13:04,985 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:13:04,985 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-10-28 09:13:04,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:13:04,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:13:04,987 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:13:04,987 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:13:04,987 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:13:04,987 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:13:04,987 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:13:04,987 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:13:04,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:13:04,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:13:04,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:13:04,988 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:13:04,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-10-28 09:13:04,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:13:04,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:13:04,990 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:13:04,990 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:13:04,990 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:13:04,990 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:13:04,990 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:13:04,990 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:13:04,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:13:04,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:13:04,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:13:04,991 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:13:04,995 INFO L134 CoverageAnalysis]: Checked inductivity of 414 backedges. 6 proven. 276 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2020-10-28 09:13:04,995 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [55341384] [2020-10-28 09:13:04,995 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:13:04,995 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-28 09:13:04,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377350121] [2020-10-28 09:13:04,996 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-28 09:13:04,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:13:04,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-28 09:13:04,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-28 09:13:04,997 INFO L87 Difference]: Start difference. First operand 78 states and 80 transitions. Second operand 27 states. [2020-10-28 09:13:05,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:13:05,323 INFO L93 Difference]: Finished difference Result 128 states and 132 transitions. [2020-10-28 09:13:05,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-28 09:13:05,323 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 75 [2020-10-28 09:13:05,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:13:05,324 INFO L225 Difference]: With dead ends: 128 [2020-10-28 09:13:05,324 INFO L226 Difference]: Without dead ends: 80 [2020-10-28 09:13:05,325 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-28 09:13:05,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-28 09:13:05,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2020-10-28 09:13:05,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-28 09:13:05,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 81 transitions. [2020-10-28 09:13:05,336 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 81 transitions. Word has length 75 [2020-10-28 09:13:05,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:13:05,336 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 81 transitions. [2020-10-28 09:13:05,336 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-28 09:13:05,336 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 81 transitions. [2020-10-28 09:13:05,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-28 09:13:05,337 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:13:05,337 INFO L422 BasicCegarLoop]: trace histogram [24, 14, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:13:05,337 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-28 09:13:05,337 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:13:05,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:13:05,338 INFO L82 PathProgramCache]: Analyzing trace with hash 272186770, now seen corresponding path program 23 times [2020-10-28 09:13:05,338 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:13:05,338 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [796746360] [2020-10-28 09:13:05,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:13:05,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:13:05,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:13:05,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:13:10,360 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:13:10,361 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-28 09:13:10,361 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:13:10,361 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-28 09:13:10,361 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:13:10,361 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:13:10,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-28 09:13:10,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 37 [2020-10-28 09:13:10,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 09:13:10,362 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:13:10,581 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:13:10,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:13:10,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:13:10,586 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:13:10,586 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:13:10,586 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:13:10,587 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:13:10,587 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:13:10,587 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:13:10,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:13:10,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:13:10,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:13:10,587 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:13:10,590 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-10-28 09:13:10,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:13:10,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:13:10,591 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:13:10,592 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:13:10,592 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:13:10,592 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:13:10,592 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:13:10,592 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:13:10,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:13:10,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:13:10,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:13:10,593 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:13:10,593 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-10-28 09:13:10,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:13:10,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:13:10,595 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:13:10,595 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:13:10,595 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:13:10,595 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:13:10,596 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:13:10,596 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:13:10,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:13:10,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:13:10,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:13:10,596 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:13:10,597 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-10-28 09:13:10,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:13:10,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:13:10,599 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:13:10,599 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:13:10,599 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:13:10,599 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:13:10,600 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:13:10,600 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:13:10,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:13:10,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:13:10,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:13:10,600 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:13:10,605 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 6 proven. 105 refuted. 0 times theorem prover too weak. 327 trivial. 0 not checked. [2020-10-28 09:13:10,606 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [796746360] [2020-10-28 09:13:10,606 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:13:10,606 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-28 09:13:10,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846456540] [2020-10-28 09:13:10,606 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-28 09:13:10,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:13:10,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-28 09:13:10,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-28 09:13:10,607 INFO L87 Difference]: Start difference. First operand 79 states and 81 transitions. Second operand 18 states. [2020-10-28 09:13:11,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:13:11,035 INFO L93 Difference]: Finished difference Result 149 states and 164 transitions. [2020-10-28 09:13:11,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-28 09:13:11,036 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 76 [2020-10-28 09:13:11,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:13:11,037 INFO L225 Difference]: With dead ends: 149 [2020-10-28 09:13:11,037 INFO L226 Difference]: Without dead ends: 117 [2020-10-28 09:13:11,038 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-28 09:13:11,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-28 09:13:11,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 80. [2020-10-28 09:13:11,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-28 09:13:11,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 82 transitions. [2020-10-28 09:13:11,049 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 82 transitions. Word has length 76 [2020-10-28 09:13:11,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:13:11,050 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 82 transitions. [2020-10-28 09:13:11,050 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-28 09:13:11,050 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 82 transitions. [2020-10-28 09:13:11,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-28 09:13:11,053 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:13:11,053 INFO L422 BasicCegarLoop]: trace histogram [24, 15, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:13:11,053 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-28 09:13:11,053 INFO L429 AbstractCegarLoop]: === Iteration 42 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:13:11,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:13:11,054 INFO L82 PathProgramCache]: Analyzing trace with hash 1536406369, now seen corresponding path program 24 times [2020-10-28 09:13:11,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:13:11,054 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2036048931] [2020-10-28 09:13:11,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:13:11,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:13:11,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:13:11,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:13:16,085 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:13:16,085 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-28 09:13:16,085 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:13:16,086 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-28 09:13:16,086 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:13:16,086 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:13:16,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-28 09:13:16,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:13:16,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-28 09:13:16,086 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:13:16,574 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:13:16,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:13:16,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:13:16,578 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:13:16,578 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:13:16,579 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:13:16,579 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:13:16,579 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:13:16,579 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:13:16,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:13:16,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:13:16,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:13:16,579 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:13:16,582 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-10-28 09:13:16,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:13:16,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:13:16,583 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:13:16,583 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:13:16,583 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:13:16,584 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:13:16,584 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:13:16,584 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:13:16,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:13:16,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:13:16,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:13:16,585 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:13:16,585 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-10-28 09:13:16,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:13:16,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:13:16,587 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:13:16,587 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:13:16,587 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:13:16,587 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:13:16,588 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:13:16,588 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:13:16,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:13:16,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:13:16,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:13:16,588 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:13:16,589 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-10-28 09:13:16,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:13:16,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:13:16,591 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:13:16,591 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:13:16,591 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:13:16,591 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:13:16,591 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:13:16,592 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:13:16,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:13:16,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:13:16,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:13:16,592 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:13:16,598 INFO L134 CoverageAnalysis]: Checked inductivity of 453 backedges. 6 proven. 300 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2020-10-28 09:13:16,598 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2036048931] [2020-10-28 09:13:16,598 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:13:16,598 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-28 09:13:16,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990656286] [2020-10-28 09:13:16,599 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-28 09:13:16,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:13:16,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-28 09:13:16,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-28 09:13:16,600 INFO L87 Difference]: Start difference. First operand 80 states and 82 transitions. Second operand 28 states. [2020-10-28 09:13:16,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:13:16,926 INFO L93 Difference]: Finished difference Result 131 states and 135 transitions. [2020-10-28 09:13:16,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-28 09:13:16,927 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 77 [2020-10-28 09:13:16,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:13:16,928 INFO L225 Difference]: With dead ends: 131 [2020-10-28 09:13:16,928 INFO L226 Difference]: Without dead ends: 82 [2020-10-28 09:13:16,929 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-28 09:13:16,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-28 09:13:16,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 81. [2020-10-28 09:13:16,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-28 09:13:16,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 83 transitions. [2020-10-28 09:13:16,939 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 83 transitions. Word has length 77 [2020-10-28 09:13:16,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:13:16,940 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 83 transitions. [2020-10-28 09:13:16,940 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-28 09:13:16,940 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 83 transitions. [2020-10-28 09:13:16,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-28 09:13:16,941 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:13:16,941 INFO L422 BasicCegarLoop]: trace histogram [25, 15, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:13:16,941 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-28 09:13:16,941 INFO L429 AbstractCegarLoop]: === Iteration 43 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:13:16,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:13:16,942 INFO L82 PathProgramCache]: Analyzing trace with hash -1458808045, now seen corresponding path program 25 times [2020-10-28 09:13:16,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:13:16,942 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1768577806] [2020-10-28 09:13:16,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:13:16,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:13:16,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:13:17,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:13:21,973 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:13:21,973 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-28 09:13:21,973 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:13:21,973 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-28 09:13:21,973 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:13:21,974 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:13:21,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-28 09:13:21,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:13:21,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-28 09:13:21,974 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:13:22,509 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:13:22,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:13:22,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:13:22,514 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:13:22,515 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:13:22,515 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:13:22,515 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:13:22,515 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:13:22,515 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:13:22,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:13:22,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:13:22,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:13:22,515 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:13:22,517 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-10-28 09:13:22,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:13:22,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:13:22,518 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:13:22,518 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:13:22,518 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:13:22,519 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:13:22,519 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:13:22,519 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:13:22,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:13:22,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:13:22,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:13:22,519 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:13:22,520 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-10-28 09:13:22,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:13:22,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:13:22,522 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:13:22,522 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:13:22,522 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:13:22,522 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:13:22,522 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:13:22,523 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:13:22,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:13:22,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:13:22,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:13:22,523 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:13:22,524 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-10-28 09:13:22,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:13:22,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:13:22,526 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:13:22,526 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:13:22,526 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:13:22,526 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:13:22,526 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:13:22,526 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:13:22,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:13:22,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:13:22,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:13:22,527 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:13:22,533 INFO L134 CoverageAnalysis]: Checked inductivity of 478 backedges. 6 proven. 325 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2020-10-28 09:13:22,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1768577806] [2020-10-28 09:13:22,533 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:13:22,533 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-28 09:13:22,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106901705] [2020-10-28 09:13:22,534 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-28 09:13:22,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:13:22,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-28 09:13:22,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-28 09:13:22,535 INFO L87 Difference]: Start difference. First operand 81 states and 83 transitions. Second operand 29 states. [2020-10-28 09:13:22,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:13:22,877 INFO L93 Difference]: Finished difference Result 132 states and 136 transitions. [2020-10-28 09:13:22,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-28 09:13:22,877 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 78 [2020-10-28 09:13:22,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:13:22,878 INFO L225 Difference]: With dead ends: 132 [2020-10-28 09:13:22,878 INFO L226 Difference]: Without dead ends: 83 [2020-10-28 09:13:22,879 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-28 09:13:22,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-28 09:13:22,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 82. [2020-10-28 09:13:22,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-28 09:13:22,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 84 transitions. [2020-10-28 09:13:22,890 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 84 transitions. Word has length 78 [2020-10-28 09:13:22,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:13:22,890 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 84 transitions. [2020-10-28 09:13:22,890 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-28 09:13:22,890 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 84 transitions. [2020-10-28 09:13:22,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-28 09:13:22,891 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:13:22,891 INFO L422 BasicCegarLoop]: trace histogram [26, 15, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:13:22,892 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-28 09:13:22,892 INFO L429 AbstractCegarLoop]: === Iteration 44 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:13:22,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:13:22,892 INFO L82 PathProgramCache]: Analyzing trace with hash 178825633, now seen corresponding path program 26 times [2020-10-28 09:13:22,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:13:22,892 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [680729479] [2020-10-28 09:13:22,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:13:22,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:13:22,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:13:23,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:13:27,937 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:13:27,937 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-28 09:13:27,937 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:13:27,937 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5019 [2020-10-28 09:13:27,937 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:13:27,937 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:13:27,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-28 09:13:27,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 39 [2020-10-28 09:13:27,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-28 09:13:27,938 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:13:28,178 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:13:28,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:13:28,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:13:28,184 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:13:28,184 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:13:28,184 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:13:28,184 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:13:28,184 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:13:28,184 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:13:28,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:13:28,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:13:28,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:13:28,185 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:13:28,186 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2020-10-28 09:13:28,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:13:28,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:13:28,187 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:13:28,187 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:13:28,187 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:13:28,187 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:13:28,188 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:13:28,188 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:13:28,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:13:28,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:13:28,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:13:28,188 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:13:28,189 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-10-28 09:13:28,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:13:28,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:13:28,190 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:13:28,191 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:13:28,191 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:13:28,191 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:13:28,191 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:13:28,191 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:13:28,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:13:28,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:13:28,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:13:28,192 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:13:28,192 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-10-28 09:13:28,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:13:28,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:13:28,194 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:13:28,194 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:13:28,194 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:13:28,194 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:13:28,194 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:13:28,194 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:13:28,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:13:28,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:13:28,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:13:28,195 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:13:28,199 INFO L134 CoverageAnalysis]: Checked inductivity of 504 backedges. 6 proven. 120 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2020-10-28 09:13:28,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [680729479] [2020-10-28 09:13:28,199 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:13:28,199 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-28 09:13:28,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516464466] [2020-10-28 09:13:28,199 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-28 09:13:28,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:13:28,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-28 09:13:28,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-28 09:13:28,200 INFO L87 Difference]: Start difference. First operand 82 states and 84 transitions. Second operand 19 states. [2020-10-28 09:13:28,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:13:28,577 INFO L93 Difference]: Finished difference Result 155 states and 171 transitions. [2020-10-28 09:13:28,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-28 09:13:28,578 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 79 [2020-10-28 09:13:28,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:13:28,579 INFO L225 Difference]: With dead ends: 155 [2020-10-28 09:13:28,579 INFO L226 Difference]: Without dead ends: 123 [2020-10-28 09:13:28,580 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-28 09:13:28,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-28 09:13:28,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 83. [2020-10-28 09:13:28,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-28 09:13:28,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 85 transitions. [2020-10-28 09:13:28,591 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 85 transitions. Word has length 79 [2020-10-28 09:13:28,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:13:28,591 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 85 transitions. [2020-10-28 09:13:28,591 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-28 09:13:28,591 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 85 transitions. [2020-10-28 09:13:28,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-28 09:13:28,592 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:13:28,592 INFO L422 BasicCegarLoop]: trace histogram [26, 16, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:13:28,592 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-28 09:13:28,592 INFO L429 AbstractCegarLoop]: === Iteration 45 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:13:28,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:13:28,593 INFO L82 PathProgramCache]: Analyzing trace with hash -1357788878, now seen corresponding path program 27 times [2020-10-28 09:13:28,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:13:28,593 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1220430450] [2020-10-28 09:13:28,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:13:28,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:13:28,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:13:28,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:13:33,627 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:13:33,628 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-28 09:13:33,628 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:13:33,628 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-28 09:13:33,628 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:13:33,628 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:13:33,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-28 09:13:33,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:13:33,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-28 09:13:33,628 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:13:34,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:13:34,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:13:34,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:13:34,227 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:13:34,227 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:13:34,227 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:13:34,227 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:13:34,227 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:13:34,228 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:13:34,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:13:34,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:13:34,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:13:34,228 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:13:34,229 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-10-28 09:13:34,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:13:34,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:13:34,231 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:13:34,231 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:13:34,231 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:13:34,232 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:13:34,232 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:13:34,232 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:13:34,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:13:34,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:13:34,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:13:34,232 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:13:34,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2020-10-28 09:13:34,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:13:34,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:13:34,235 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:13:34,235 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:13:34,235 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:13:34,235 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:13:34,236 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:13:34,236 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:13:34,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:13:34,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:13:34,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:13:34,236 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:13:34,237 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-10-28 09:13:34,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:13:34,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:13:34,239 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:13:34,239 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:13:34,239 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:13:34,239 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:13:34,239 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:13:34,240 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:13:34,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:13:34,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:13:34,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:13:34,240 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:13:34,246 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 6 proven. 351 refuted. 0 times theorem prover too weak. 163 trivial. 0 not checked. [2020-10-28 09:13:34,246 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1220430450] [2020-10-28 09:13:34,247 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:13:34,247 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-28 09:13:34,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350294690] [2020-10-28 09:13:34,247 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-28 09:13:34,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:13:34,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-28 09:13:34,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-28 09:13:34,248 INFO L87 Difference]: Start difference. First operand 83 states and 85 transitions. Second operand 30 states. [2020-10-28 09:13:34,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:13:34,449 INFO L93 Difference]: Finished difference Result 135 states and 139 transitions. [2020-10-28 09:13:34,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-28 09:13:34,449 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 80 [2020-10-28 09:13:34,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:13:34,450 INFO L225 Difference]: With dead ends: 135 [2020-10-28 09:13:34,450 INFO L226 Difference]: Without dead ends: 85 [2020-10-28 09:13:34,451 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-28 09:13:34,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-28 09:13:34,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 84. [2020-10-28 09:13:34,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-28 09:13:34,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 86 transitions. [2020-10-28 09:13:34,462 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 86 transitions. Word has length 80 [2020-10-28 09:13:34,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:13:34,462 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 86 transitions. [2020-10-28 09:13:34,463 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-28 09:13:34,463 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 86 transitions. [2020-10-28 09:13:34,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-28 09:13:34,463 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:13:34,463 INFO L422 BasicCegarLoop]: trace histogram [27, 16, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:13:34,463 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-28 09:13:34,463 INFO L429 AbstractCegarLoop]: === Iteration 46 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:13:34,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:13:34,464 INFO L82 PathProgramCache]: Analyzing trace with hash 450145344, now seen corresponding path program 28 times [2020-10-28 09:13:34,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:13:34,464 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [902869083] [2020-10-28 09:13:34,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:13:34,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:13:34,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:13:34,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:13:39,502 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:13:39,503 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 97 [2020-10-28 09:13:39,503 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:13:39,503 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5019 [2020-10-28 09:13:39,503 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:13:39,503 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:13:39,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-28 09:13:39,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 40 [2020-10-28 09:13:39,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-28 09:13:39,503 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:13:39,762 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:13:39,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:13:39,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:13:39,766 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:13:39,766 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:13:39,766 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:13:39,766 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:13:39,767 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:13:39,767 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:13:39,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:13:39,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:13:39,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:13:39,767 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:13:39,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-10-28 09:13:39,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:13:39,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:13:39,770 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:13:39,770 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:13:39,770 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:13:39,770 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:13:39,770 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:13:39,771 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:13:39,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:13:39,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:13:39,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:13:39,771 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:13:39,772 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-10-28 09:13:39,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:13:39,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:13:39,773 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:13:39,773 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:13:39,774 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:13:39,774 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:13:39,774 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:13:39,774 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:13:39,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:13:39,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:13:39,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:13:39,775 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:13:39,775 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2020-10-28 09:13:39,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:13:39,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:13:39,777 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:13:39,777 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:13:39,777 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:13:39,777 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:13:39,777 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:13:39,778 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:13:39,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:13:39,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:13:39,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:13:39,778 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:13:39,784 INFO L134 CoverageAnalysis]: Checked inductivity of 547 backedges. 6 proven. 136 refuted. 0 times theorem prover too weak. 405 trivial. 0 not checked. [2020-10-28 09:13:39,784 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [902869083] [2020-10-28 09:13:39,784 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:13:39,784 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-28 09:13:39,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45495435] [2020-10-28 09:13:39,785 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-28 09:13:39,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:13:39,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-28 09:13:39,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-28 09:13:39,786 INFO L87 Difference]: Start difference. First operand 84 states and 86 transitions. Second operand 20 states. [2020-10-28 09:13:40,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:13:40,288 INFO L93 Difference]: Finished difference Result 160 states and 177 transitions. [2020-10-28 09:13:40,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-28 09:13:40,289 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 81 [2020-10-28 09:13:40,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:13:40,291 INFO L225 Difference]: With dead ends: 160 [2020-10-28 09:13:40,291 INFO L226 Difference]: Without dead ends: 128 [2020-10-28 09:13:40,291 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-28 09:13:40,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-28 09:13:40,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 85. [2020-10-28 09:13:40,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-28 09:13:40,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 87 transitions. [2020-10-28 09:13:40,306 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 87 transitions. Word has length 81 [2020-10-28 09:13:40,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:13:40,307 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 87 transitions. [2020-10-28 09:13:40,307 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-28 09:13:40,307 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 87 transitions. [2020-10-28 09:13:40,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-28 09:13:40,307 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:13:40,307 INFO L422 BasicCegarLoop]: trace histogram [27, 17, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:13:40,308 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-28 09:13:40,308 INFO L429 AbstractCegarLoop]: === Iteration 47 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:13:40,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:13:40,308 INFO L82 PathProgramCache]: Analyzing trace with hash -1536812429, now seen corresponding path program 29 times [2020-10-28 09:13:40,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:13:40,309 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [622564987] [2020-10-28 09:13:40,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:13:40,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:13:40,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:13:40,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:13:45,342 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:13:45,343 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 98 [2020-10-28 09:13:45,343 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:13:45,343 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-28 09:13:45,343 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:13:45,343 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:13:45,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-28 09:13:45,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:13:45,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-28 09:13:45,344 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:13:45,945 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:13:45,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:13:45,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:13:45,950 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:13:45,950 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:13:45,950 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:13:45,950 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:13:45,950 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:13:45,950 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:13:45,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:13:45,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:13:45,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:13:45,951 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:13:45,952 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-10-28 09:13:45,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:13:45,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:13:45,955 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:13:45,955 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:13:45,955 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:13:45,955 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:13:45,955 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:13:45,955 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:13:45,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:13:45,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:13:45,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:13:45,956 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:13:45,957 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-10-28 09:13:45,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:13:45,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:13:45,958 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:13:45,958 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:13:45,959 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:13:45,959 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:13:45,959 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:13:45,959 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:13:45,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:13:45,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:13:45,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:13:45,960 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:13:45,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-10-28 09:13:45,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:13:45,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:13:45,962 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:13:45,962 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:13:45,963 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:13:45,963 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:13:45,963 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:13:45,963 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:13:45,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:13:45,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:13:45,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:13:45,964 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:13:45,970 INFO L134 CoverageAnalysis]: Checked inductivity of 564 backedges. 6 proven. 378 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2020-10-28 09:13:45,970 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [622564987] [2020-10-28 09:13:45,970 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:13:45,970 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-28 09:13:45,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708115327] [2020-10-28 09:13:45,971 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-28 09:13:45,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:13:45,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-28 09:13:45,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-28 09:13:45,972 INFO L87 Difference]: Start difference. First operand 85 states and 87 transitions. Second operand 31 states. [2020-10-28 09:13:46,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:13:46,305 INFO L93 Difference]: Finished difference Result 138 states and 142 transitions. [2020-10-28 09:13:46,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-28 09:13:46,306 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 82 [2020-10-28 09:13:46,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:13:46,307 INFO L225 Difference]: With dead ends: 138 [2020-10-28 09:13:46,307 INFO L226 Difference]: Without dead ends: 87 [2020-10-28 09:13:46,308 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-28 09:13:46,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-28 09:13:46,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 86. [2020-10-28 09:13:46,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-28 09:13:46,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 88 transitions. [2020-10-28 09:13:46,317 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 88 transitions. Word has length 82 [2020-10-28 09:13:46,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:13:46,317 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 88 transitions. [2020-10-28 09:13:46,317 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-28 09:13:46,317 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 88 transitions. [2020-10-28 09:13:46,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-28 09:13:46,318 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:13:46,318 INFO L422 BasicCegarLoop]: trace histogram [28, 17, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:13:46,318 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-28 09:13:46,318 INFO L429 AbstractCegarLoop]: === Iteration 48 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:13:46,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:13:46,319 INFO L82 PathProgramCache]: Analyzing trace with hash 721187329, now seen corresponding path program 30 times [2020-10-28 09:13:46,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:13:46,319 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1308498821] [2020-10-28 09:13:46,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:13:46,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:13:46,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:13:46,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:13:51,372 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:13:51,373 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 99 [2020-10-28 09:13:51,373 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:13:51,373 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5030 [2020-10-28 09:13:51,373 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:13:51,373 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:13:51,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-28 09:13:51,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:13:51,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-28 09:13:51,374 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:13:52,175 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:13:52,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:13:52,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:13:52,180 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:13:52,180 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:13:52,180 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:13:52,180 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:13:52,180 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:13:52,181 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:13:52,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:13:52,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:13:52,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:13:52,181 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:13:52,183 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-10-28 09:13:52,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:13:52,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:13:52,184 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:13:52,185 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:13:52,185 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:13:52,185 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:13:52,185 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:13:52,185 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:13:52,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:13:52,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:13:52,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:13:52,186 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:13:52,195 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-10-28 09:13:52,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:13:52,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:13:52,197 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:13:52,198 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:13:52,198 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:13:52,198 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:13:52,198 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:13:52,198 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:13:52,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:13:52,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:13:52,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:13:52,199 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:13:52,199 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2020-10-28 09:13:52,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:13:52,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:13:52,203 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:13:52,203 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:13:52,203 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:13:52,203 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:13:52,203 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:13:52,203 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:13:52,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:13:52,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:13:52,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:13:52,204 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:13:52,211 INFO L134 CoverageAnalysis]: Checked inductivity of 592 backedges. 6 proven. 406 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2020-10-28 09:13:52,212 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1308498821] [2020-10-28 09:13:52,212 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:13:52,212 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-28 09:13:52,212 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757225673] [2020-10-28 09:13:52,213 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-28 09:13:52,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:13:52,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-28 09:13:52,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-28 09:13:52,214 INFO L87 Difference]: Start difference. First operand 86 states and 88 transitions. Second operand 32 states. [2020-10-28 09:13:52,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:13:52,592 INFO L93 Difference]: Finished difference Result 142 states and 147 transitions. [2020-10-28 09:13:52,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-28 09:13:52,593 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 83 [2020-10-28 09:13:52,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:13:52,594 INFO L225 Difference]: With dead ends: 142 [2020-10-28 09:13:52,594 INFO L226 Difference]: Without dead ends: 91 [2020-10-28 09:13:52,595 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-28 09:13:52,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-28 09:13:52,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 87. [2020-10-28 09:13:52,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-28 09:13:52,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 89 transitions. [2020-10-28 09:13:52,605 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 89 transitions. Word has length 83 [2020-10-28 09:13:52,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:13:52,605 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 89 transitions. [2020-10-28 09:13:52,605 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-28 09:13:52,605 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 89 transitions. [2020-10-28 09:13:52,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-28 09:13:52,606 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:13:52,606 INFO L422 BasicCegarLoop]: trace histogram [29, 17, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:13:52,606 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-28 09:13:52,607 INFO L429 AbstractCegarLoop]: === Iteration 49 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:13:52,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:13:52,607 INFO L82 PathProgramCache]: Analyzing trace with hash 1999703091, now seen corresponding path program 31 times [2020-10-28 09:13:52,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:13:52,607 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [56243869] [2020-10-28 09:13:52,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:13:52,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:13:52,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:13:52,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:13:57,639 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:13:57,639 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-10-28 09:13:57,639 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:13:57,639 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-28 09:13:57,639 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:13:57,640 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:13:57,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-28 09:13:57,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 42 [2020-10-28 09:13:57,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-28 09:13:57,640 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:13:57,985 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:13:57,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:13:57,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:13:57,990 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:13:57,991 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:13:57,991 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:13:57,991 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:13:57,991 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:13:57,992 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:13:57,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:13:57,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:13:57,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:13:57,993 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:13:57,995 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-10-28 09:13:57,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:13:57,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:13:57,997 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:13:57,998 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:13:57,998 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:13:57,998 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:13:57,998 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:13:57,999 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:13:57,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:13:57,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:13:57,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:13:57,999 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:13:58,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-10-28 09:13:58,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:13:58,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:13:58,011 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:13:58,011 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:13:58,011 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:13:58,012 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 09:13:58,012 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:13:58,012 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:13:58,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:13:58,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:13:58,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:13:58,013 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:13:58,014 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-10-28 09:13:58,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:13:58,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:13:58,018 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:13:58,018 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:13:58,018 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:13:58,019 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:13:58,019 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:13:58,019 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:13:58,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:13:58,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:13:58,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:13:58,020 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:13:58,035 INFO L134 CoverageAnalysis]: Checked inductivity of 621 backedges. 6 proven. 153 refuted. 0 times theorem prover too weak. 462 trivial. 0 not checked. [2020-10-28 09:13:58,035 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [56243869] [2020-10-28 09:13:58,035 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:13:58,035 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-28 09:13:58,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162909787] [2020-10-28 09:13:58,036 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-28 09:13:58,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:13:58,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-28 09:13:58,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-28 09:13:58,037 INFO L87 Difference]: Start difference. First operand 87 states and 89 transitions. Second operand 21 states. [2020-10-28 09:13:58,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:13:58,528 INFO L93 Difference]: Finished difference Result 166 states and 184 transitions. [2020-10-28 09:13:58,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-28 09:13:58,528 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 84 [2020-10-28 09:13:58,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:13:58,530 INFO L225 Difference]: With dead ends: 166 [2020-10-28 09:13:58,530 INFO L226 Difference]: Without dead ends: 134 [2020-10-28 09:13:58,531 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-28 09:13:58,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-10-28 09:13:58,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 88. [2020-10-28 09:13:58,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-28 09:13:58,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 90 transitions. [2020-10-28 09:13:58,544 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 90 transitions. Word has length 84 [2020-10-28 09:13:58,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:13:58,545 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 90 transitions. [2020-10-28 09:13:58,545 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-28 09:13:58,545 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 90 transitions. [2020-10-28 09:13:58,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-28 09:13:58,545 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:13:58,545 INFO L422 BasicCegarLoop]: trace histogram [29, 18, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:13:58,546 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-28 09:13:58,546 INFO L429 AbstractCegarLoop]: === Iteration 50 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:13:58,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:13:58,546 INFO L82 PathProgramCache]: Analyzing trace with hash -745162528, now seen corresponding path program 32 times [2020-10-28 09:13:58,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:13:58,546 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [192650751] [2020-10-28 09:13:58,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:13:58,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:13:58,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:13:58,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:14:03,576 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:14:03,576 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-28 09:14:03,576 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:14:03,576 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-28 09:14:03,577 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:14:03,577 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:14:03,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-28 09:14:03,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:14:03,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-28 09:14:03,577 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:14:04,256 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:14:04,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:14:04,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:14:04,260 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:14:04,260 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:14:04,260 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:14:04,260 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:14:04,261 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:14:04,261 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:14:04,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:14:04,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:14:04,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:14:04,262 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:14:04,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-10-28 09:14:04,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:14:04,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:14:04,265 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:14:04,265 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:14:04,265 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:14:04,265 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:14:04,265 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:14:04,265 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:14:04,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:14:04,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:14:04,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:14:04,266 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:14:04,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-10-28 09:14:04,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:14:04,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:14:04,267 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:14:04,268 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:14:04,268 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:14:04,268 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:14:04,268 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:14:04,268 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:14:04,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:14:04,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:14:04,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:14:04,268 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:14:04,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2020-10-28 09:14:04,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:14:04,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:14:04,271 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:14:04,271 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:14:04,271 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:14:04,271 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:14:04,271 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:14:04,271 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:14:04,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:14:04,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:14:04,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:14:04,272 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:14:04,277 INFO L134 CoverageAnalysis]: Checked inductivity of 639 backedges. 6 proven. 435 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2020-10-28 09:14:04,277 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [192650751] [2020-10-28 09:14:04,277 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:14:04,277 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-28 09:14:04,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009087700] [2020-10-28 09:14:04,278 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-28 09:14:04,278 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:14:04,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-28 09:14:04,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-28 09:14:04,278 INFO L87 Difference]: Start difference. First operand 88 states and 90 transitions. Second operand 33 states. [2020-10-28 09:14:04,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:14:04,677 INFO L93 Difference]: Finished difference Result 145 states and 150 transitions. [2020-10-28 09:14:04,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-28 09:14:04,678 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 85 [2020-10-28 09:14:04,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:14:04,679 INFO L225 Difference]: With dead ends: 145 [2020-10-28 09:14:04,679 INFO L226 Difference]: Without dead ends: 93 [2020-10-28 09:14:04,680 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-28 09:14:04,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-28 09:14:04,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 89. [2020-10-28 09:14:04,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-28 09:14:04,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 91 transitions. [2020-10-28 09:14:04,692 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 91 transitions. Word has length 85 [2020-10-28 09:14:04,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:14:04,692 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 91 transitions. [2020-10-28 09:14:04,692 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-28 09:14:04,692 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 91 transitions. [2020-10-28 09:14:04,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-10-28 09:14:04,693 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:14:04,693 INFO L422 BasicCegarLoop]: trace histogram [30, 18, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:14:04,693 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-10-28 09:14:04,694 INFO L429 AbstractCegarLoop]: === Iteration 51 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:14:04,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:14:04,694 INFO L82 PathProgramCache]: Analyzing trace with hash -452161902, now seen corresponding path program 33 times [2020-10-28 09:14:04,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:14:04,694 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [37715491] [2020-10-28 09:14:04,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:14:04,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:14:04,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:14:05,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:14:09,746 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:14:09,746 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-28 09:14:09,746 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:14:09,746 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5026 [2020-10-28 09:14:09,746 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:14:09,746 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:14:09,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-28 09:14:09,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:14:09,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-28 09:14:09,747 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:14:10,491 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:14:10,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:14:10,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:14:10,495 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:14:10,495 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:14:10,495 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:14:10,495 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:14:10,495 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:14:10,495 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:14:10,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:14:10,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:14:10,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:14:10,496 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:14:10,497 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-10-28 09:14:10,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:14:10,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:14:10,498 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:14:10,498 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:14:10,498 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:14:10,498 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:14:10,499 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:14:10,499 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:14:10,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:14:10,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:14:10,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:14:10,499 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:14:10,500 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-10-28 09:14:10,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:14:10,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:14:10,501 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:14:10,501 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:14:10,501 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:14:10,501 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:14:10,501 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:14:10,501 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:14:10,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:14:10,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:14:10,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:14:10,502 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:14:10,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-10-28 09:14:10,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:14:10,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:14:10,503 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:14:10,504 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:14:10,504 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:14:10,504 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:14:10,504 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:14:10,504 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:14:10,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:14:10,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:14:10,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:14:10,504 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:14:10,509 INFO L134 CoverageAnalysis]: Checked inductivity of 669 backedges. 6 proven. 465 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2020-10-28 09:14:10,509 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [37715491] [2020-10-28 09:14:10,509 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:14:10,510 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-28 09:14:10,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903628591] [2020-10-28 09:14:10,510 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-28 09:14:10,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:14:10,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-28 09:14:10,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-28 09:14:10,511 INFO L87 Difference]: Start difference. First operand 89 states and 91 transitions. Second operand 34 states. [2020-10-28 09:14:10,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:14:10,932 INFO L93 Difference]: Finished difference Result 146 states and 151 transitions. [2020-10-28 09:14:10,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-28 09:14:10,933 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 86 [2020-10-28 09:14:10,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:14:10,934 INFO L225 Difference]: With dead ends: 146 [2020-10-28 09:14:10,935 INFO L226 Difference]: Without dead ends: 94 [2020-10-28 09:14:10,935 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-28 09:14:10,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-28 09:14:10,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 90. [2020-10-28 09:14:10,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-28 09:14:10,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 92 transitions. [2020-10-28 09:14:10,947 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 92 transitions. Word has length 86 [2020-10-28 09:14:10,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:14:10,947 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 92 transitions. [2020-10-28 09:14:10,947 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-28 09:14:10,947 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 92 transitions. [2020-10-28 09:14:10,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-28 09:14:10,948 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:14:10,948 INFO L422 BasicCegarLoop]: trace histogram [31, 18, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:14:10,948 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-10-28 09:14:10,948 INFO L429 AbstractCegarLoop]: === Iteration 52 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:14:10,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:14:10,949 INFO L82 PathProgramCache]: Analyzing trace with hash 40922912, now seen corresponding path program 34 times [2020-10-28 09:14:10,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:14:10,949 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [313550741] [2020-10-28 09:14:10,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:14:10,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:14:10,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:14:11,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking...