/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=SHALLOWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/loops-crafted-1/nested3-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 01:52:28,289 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 01:52:28,295 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 01:52:28,353 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 01:52:28,354 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 01:52:28,360 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 01:52:28,362 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 01:52:28,368 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 01:52:28,371 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 01:52:28,377 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 01:52:28,378 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 01:52:28,380 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 01:52:28,380 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 01:52:28,384 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 01:52:28,387 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 01:52:28,390 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 01:52:28,391 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 01:52:28,395 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 01:52:28,402 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 01:52:28,424 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 01:52:28,426 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 01:52:28,427 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 01:52:28,429 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 01:52:28,432 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 01:52:28,441 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 01:52:28,441 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 01:52:28,442 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 01:52:28,444 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 01:52:28,445 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 01:52:28,446 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 01:52:28,446 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 01:52:28,447 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 01:52:28,449 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 01:52:28,450 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 01:52:28,451 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 01:52:28,452 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 01:52:28,453 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 01:52:28,453 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 01:52:28,453 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 01:52:28,454 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 01:52:28,455 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 01:52:28,465 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 [2020-10-27 01:52:28,491 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 01:52:28,491 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 01:52:28,493 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 01:52:28,493 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 01:52:28,493 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 01:52:28,494 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 01:52:28,494 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 01:52:28,494 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 01:52:28,495 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 01:52:28,495 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 01:52:28,495 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 01:52:28,496 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 01:52:28,496 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 01:52:28,496 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 01:52:28,496 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 01:52:28,497 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 01:52:28,497 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 01:52:28,497 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 01:52:28,497 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 01:52:28,498 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 01:52:28,498 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 01:52:28,498 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 01:52:28,499 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 01:52:28,499 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 01:52:28,499 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 01:52:28,500 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 01:52:28,500 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 01:52:28,500 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 01:52:28,500 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 01:52:28,501 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 01:52:28,873 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 01:52:28,927 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 01:52:28,931 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 01:52:28,932 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 01:52:28,933 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 01:52:28,934 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/nested3-1.c [2020-10-27 01:52:29,014 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8b4efea9f/fc6fb23ccd2449b8a62ea5f69f8e89cc/FLAG44186c1f0 [2020-10-27 01:52:29,626 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 01:52:29,627 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops-crafted-1/nested3-1.c [2020-10-27 01:52:29,635 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8b4efea9f/fc6fb23ccd2449b8a62ea5f69f8e89cc/FLAG44186c1f0 [2020-10-27 01:52:30,006 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8b4efea9f/fc6fb23ccd2449b8a62ea5f69f8e89cc [2020-10-27 01:52:30,011 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 01:52:30,019 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 01:52:30,023 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 01:52:30,024 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 01:52:30,028 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 01:52:30,029 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 01:52:30" (1/1) ... [2020-10-27 01:52:30,033 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2fdc189c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:52:30, skipping insertion in model container [2020-10-27 01:52:30,033 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 01:52:30" (1/1) ... [2020-10-27 01:52:30,042 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 01:52:30,065 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 01:52:30,273 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 01:52:30,289 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 01:52:30,326 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 01:52:30,350 INFO L208 MainTranslator]: Completed translation [2020-10-27 01:52:30,350 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:52:30 WrapperNode [2020-10-27 01:52:30,350 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 01:52:30,354 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 01:52:30,354 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 01:52:30,354 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 01:52:30,368 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:52:30" (1/1) ... [2020-10-27 01:52:30,372 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:52:30" (1/1) ... [2020-10-27 01:52:30,383 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:52:30" (1/1) ... [2020-10-27 01:52:30,384 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:52:30" (1/1) ... [2020-10-27 01:52:30,393 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:52:30" (1/1) ... [2020-10-27 01:52:30,404 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:52:30" (1/1) ... [2020-10-27 01:52:30,406 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:52:30" (1/1) ... [2020-10-27 01:52:30,416 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 01:52:30,417 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 01:52:30,417 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 01:52:30,418 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 01:52:30,420 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:52:30" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 01:52:30,514 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 01:52:30,514 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 01:52:30,515 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 01:52:30,515 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-27 01:52:30,516 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 01:52:30,516 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 01:52:30,516 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 01:52:30,516 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 01:52:30,516 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 01:52:30,516 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-27 01:52:30,517 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 01:52:30,518 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 01:52:30,518 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 01:52:30,518 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 01:52:30,518 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 01:52:30,519 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 01:52:30,519 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 01:52:30,959 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 01:52:30,959 INFO L298 CfgBuilder]: Removed 3 assume(true) statements. [2020-10-27 01:52:30,961 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 01:52:30 BoogieIcfgContainer [2020-10-27 01:52:30,961 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 01:52:30,963 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 01:52:30,963 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 01:52:30,966 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 01:52:30,967 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 01:52:30" (1/3) ... [2020-10-27 01:52:30,968 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@742731b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 01:52:30, skipping insertion in model container [2020-10-27 01:52:30,968 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:52:30" (2/3) ... [2020-10-27 01:52:30,968 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@742731b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 01:52:30, skipping insertion in model container [2020-10-27 01:52:30,969 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 01:52:30" (3/3) ... [2020-10-27 01:52:30,970 INFO L111 eAbstractionObserver]: Analyzing ICFG nested3-1.c [2020-10-27 01:52:30,982 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 01:52:30,987 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 01:52:31,001 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 01:52:31,074 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 01:52:31,074 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 01:52:31,074 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 01:52:31,074 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 01:52:31,075 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 01:52:31,075 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 01:52:31,075 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 01:52:31,075 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 01:52:31,096 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2020-10-27 01:52:31,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-27 01:52:31,101 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:52:31,102 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:52:31,102 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:52:31,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:52:31,109 INFO L82 PathProgramCache]: Analyzing trace with hash -809674470, now seen corresponding path program 1 times [2020-10-27 01:52:31,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:52:31,119 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1310004611] [2020-10-27 01:52:31,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:52:31,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:52:31,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:52:31,333 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:52:31,334 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-27 01:52:31,334 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:52:31,334 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 92 [2020-10-27 01:52:31,336 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:52:31,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:52:31,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:52:31,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:52:31,337 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 01:52:31,473 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:52:31,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:52:31,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:52:31,500 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:52:31,500 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:52:31,500 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:52:31,500 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-27 01:52:31,501 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:52:31,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:52:31,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:52:31,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:52:31,501 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:52:31,515 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:52:31,516 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1310004611] [2020-10-27 01:52:31,518 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:52:31,518 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-27 01:52:31,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364309860] [2020-10-27 01:52:31,523 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-27 01:52:31,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:52:31,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-27 01:52:31,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-27 01:52:31,541 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 3 states. [2020-10-27 01:52:31,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:52:31,634 INFO L93 Difference]: Finished difference Result 49 states and 69 transitions. [2020-10-27 01:52:31,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-27 01:52:31,636 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2020-10-27 01:52:31,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:52:31,644 INFO L225 Difference]: With dead ends: 49 [2020-10-27 01:52:31,644 INFO L226 Difference]: Without dead ends: 21 [2020-10-27 01:52:31,648 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 [2020-10-27 01:52:31,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-10-27 01:52:31,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-10-27 01:52:31,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-27 01:52:31,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2020-10-27 01:52:31,695 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 12 [2020-10-27 01:52:31,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:52:31,696 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2020-10-27 01:52:31,696 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-27 01:52:31,696 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2020-10-27 01:52:31,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-27 01:52:31,697 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:52:31,697 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:52:31,697 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 01:52:31,698 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:52:31,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:52:31,698 INFO L82 PathProgramCache]: Analyzing trace with hash -1725807302, now seen corresponding path program 1 times [2020-10-27 01:52:31,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:52:31,699 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [737037115] [2020-10-27 01:52:31,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:52:31,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:52:31,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:52:31,876 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:52:31,876 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-27 01:52:31,876 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:52:31,877 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 154 [2020-10-27 01:52:31,877 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:52:31,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:52:31,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:52:31,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 01:52:31,878 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:52:32,017 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:52:32,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:52:32,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:52:32,031 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:52:32,031 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:52:32,031 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:52:32,032 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 01:52:32,032 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:52:32,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:52:32,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:52:32,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:52:32,033 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:52:32,039 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:52:32,040 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [737037115] [2020-10-27 01:52:32,040 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:52:32,040 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 01:52:32,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143034922] [2020-10-27 01:52:32,042 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 01:52:32,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:52:32,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 01:52:32,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 01:52:32,043 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 4 states. [2020-10-27 01:52:32,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:52:32,220 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2020-10-27 01:52:32,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 01:52:32,221 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-10-27 01:52:32,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:52:32,222 INFO L225 Difference]: With dead ends: 36 [2020-10-27 01:52:32,222 INFO L226 Difference]: Without dead ends: 28 [2020-10-27 01:52:32,223 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 01:52:32,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-27 01:52:32,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 22. [2020-10-27 01:52:32,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-27 01:52:32,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2020-10-27 01:52:32,237 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 12 [2020-10-27 01:52:32,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:52:32,238 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2020-10-27 01:52:32,238 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 01:52:32,238 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2020-10-27 01:52:32,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-27 01:52:32,239 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:52:32,239 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:52:32,239 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 01:52:32,239 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:52:32,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:52:32,240 INFO L82 PathProgramCache]: Analyzing trace with hash -1515386096, now seen corresponding path program 1 times [2020-10-27 01:52:32,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:52:32,241 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1053857386] [2020-10-27 01:52:32,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:52:32,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:52:32,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:52:32,331 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:52:32,331 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-27 01:52:32,331 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:52:32,331 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 74 [2020-10-27 01:52:32,332 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:52:32,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:52:32,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:52:32,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 01:52:32,332 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:52:32,403 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:52:32,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:52:32,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:52:32,414 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:52:32,415 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:52:32,415 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:52:32,415 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 01:52:32,416 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:52:32,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:52:32,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:52:32,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:52:32,416 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:52:32,422 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:52:32,422 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1053857386] [2020-10-27 01:52:32,422 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:52:32,423 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 01:52:32,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829405727] [2020-10-27 01:52:32,423 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 01:52:32,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:52:32,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 01:52:32,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 01:52:32,425 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand 4 states. [2020-10-27 01:52:32,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:52:32,566 INFO L93 Difference]: Finished difference Result 41 states and 52 transitions. [2020-10-27 01:52:32,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 01:52:32,567 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2020-10-27 01:52:32,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:52:32,568 INFO L225 Difference]: With dead ends: 41 [2020-10-27 01:52:32,568 INFO L226 Difference]: Without dead ends: 26 [2020-10-27 01:52:32,569 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 01:52:32,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-10-27 01:52:32,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 23. [2020-10-27 01:52:32,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-27 01:52:32,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2020-10-27 01:52:32,578 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 13 [2020-10-27 01:52:32,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:52:32,578 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2020-10-27 01:52:32,578 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 01:52:32,579 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2020-10-27 01:52:32,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-27 01:52:32,579 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:52:32,579 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:52:32,580 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 01:52:32,580 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:52:32,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:52:32,581 INFO L82 PathProgramCache]: Analyzing trace with hash 1025777613, now seen corresponding path program 1 times [2020-10-27 01:52:32,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:52:32,581 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1199753656] [2020-10-27 01:52:32,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:52:32,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:52:32,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:52:32,640 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:52:32,642 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-27 01:52:32,642 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:52:32,642 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 46 [2020-10-27 01:52:32,643 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:52:32,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:52:32,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 01:52:32,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 01:52:32,643 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:52:32,721 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:52:32,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:52:32,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:52:32,732 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:52:32,732 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:52:32,732 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:52:32,732 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 01:52:32,733 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:52:32,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:52:32,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:52:32,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:52:32,733 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:52:32,739 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:52:32,740 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1199753656] [2020-10-27 01:52:32,740 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:52:32,740 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 01:52:32,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462714734] [2020-10-27 01:52:32,741 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 01:52:32,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:52:32,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 01:52:32,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 01:52:32,742 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand 4 states. [2020-10-27 01:52:32,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:52:32,858 INFO L93 Difference]: Finished difference Result 41 states and 50 transitions. [2020-10-27 01:52:32,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 01:52:32,859 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-10-27 01:52:32,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:52:32,860 INFO L225 Difference]: With dead ends: 41 [2020-10-27 01:52:32,860 INFO L226 Difference]: Without dead ends: 25 [2020-10-27 01:52:32,861 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 01:52:32,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-10-27 01:52:32,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2020-10-27 01:52:32,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-27 01:52:32,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2020-10-27 01:52:32,870 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 14 [2020-10-27 01:52:32,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:52:32,870 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2020-10-27 01:52:32,870 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 01:52:32,870 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2020-10-27 01:52:32,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-27 01:52:32,871 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:52:32,872 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:52:32,872 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 01:52:32,872 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:52:32,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:52:32,873 INFO L82 PathProgramCache]: Analyzing trace with hash -1745267730, now seen corresponding path program 1 times [2020-10-27 01:52:32,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:52:32,873 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1797709209] [2020-10-27 01:52:32,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:52:32,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:52:32,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:52:32,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:52:33,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:52:33,360 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:52:33,361 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-27 01:52:33,361 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:52:33,361 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 474 [2020-10-27 01:52:33,362 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:52:33,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 01:52:33,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 01:52:33,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-27 01:52:33,363 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 01:52:33,473 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:52:33,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:52:33,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:52:33,483 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:52:33,484 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:52:33,484 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:52:33,484 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 01:52:33,484 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:52:33,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:52:33,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:52:33,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:52:33,485 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:52:33,489 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:52:33,490 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1797709209] [2020-10-27 01:52:33,490 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:52:33,490 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 01:52:33,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883848120] [2020-10-27 01:52:33,491 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 01:52:33,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:52:33,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 01:52:33,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-27 01:52:33,493 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand 7 states. [2020-10-27 01:52:33,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:52:33,692 INFO L93 Difference]: Finished difference Result 43 states and 52 transitions. [2020-10-27 01:52:33,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 01:52:33,692 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 15 [2020-10-27 01:52:33,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:52:33,693 INFO L225 Difference]: With dead ends: 43 [2020-10-27 01:52:33,693 INFO L226 Difference]: Without dead ends: 26 [2020-10-27 01:52:33,694 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-10-27 01:52:33,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-10-27 01:52:33,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2020-10-27 01:52:33,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-27 01:52:33,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2020-10-27 01:52:33,703 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 15 [2020-10-27 01:52:33,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:52:33,703 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2020-10-27 01:52:33,704 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 01:52:33,704 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2020-10-27 01:52:33,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-27 01:52:33,704 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:52:33,705 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:52:33,705 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 01:52:33,705 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:52:33,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:52:33,706 INFO L82 PathProgramCache]: Analyzing trace with hash -1748327443, now seen corresponding path program 2 times [2020-10-27 01:52:33,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:52:33,706 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1395738089] [2020-10-27 01:52:33,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:52:33,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:52:33,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:52:33,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:52:33,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:52:34,108 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:52:34,108 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-27 01:52:34,108 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:52:34,108 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 390 [2020-10-27 01:52:34,108 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:52:34,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 01:52:34,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 01:52:34,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-27 01:52:34,109 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:52:34,191 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:52:34,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:52:34,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:52:34,203 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:52:34,204 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:52:34,204 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:52:34,204 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 01:52:34,204 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:52:34,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:52:34,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:52:34,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:52:34,205 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:52:34,209 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:52:34,210 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1395738089] [2020-10-27 01:52:34,211 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:52:34,212 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 01:52:34,212 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866588364] [2020-10-27 01:52:34,213 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 01:52:34,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:52:34,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 01:52:34,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 01:52:34,217 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand 6 states. [2020-10-27 01:52:34,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:52:34,457 INFO L93 Difference]: Finished difference Result 45 states and 54 transitions. [2020-10-27 01:52:34,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 01:52:34,458 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2020-10-27 01:52:34,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:52:34,459 INFO L225 Difference]: With dead ends: 45 [2020-10-27 01:52:34,459 INFO L226 Difference]: Without dead ends: 27 [2020-10-27 01:52:34,461 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-27 01:52:34,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-27 01:52:34,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2020-10-27 01:52:34,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-27 01:52:34,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2020-10-27 01:52:34,482 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 16 [2020-10-27 01:52:34,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:52:34,483 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2020-10-27 01:52:34,483 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 01:52:34,484 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2020-10-27 01:52:34,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-27 01:52:34,485 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:52:34,485 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:52:34,485 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 01:52:34,485 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:52:34,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:52:34,486 INFO L82 PathProgramCache]: Analyzing trace with hash -1843178546, now seen corresponding path program 3 times [2020-10-27 01:52:34,487 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:52:34,487 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [20809073] [2020-10-27 01:52:34,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:52:34,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:52:34,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:52:34,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:52:34,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:52:34,970 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:52:34,970 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-27 01:52:34,970 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:52:34,971 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 468 [2020-10-27 01:52:34,971 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:52:34,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 01:52:34,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 01:52:34,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-27 01:52:34,971 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:52:35,095 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:52:35,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:52:35,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:52:35,102 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:52:35,102 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:52:35,103 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:52:35,103 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:52:35,103 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:52:35,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:52:35,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:52:35,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:52:35,104 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:52:35,107 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:52:35,107 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [20809073] [2020-10-27 01:52:35,108 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:52:35,108 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 01:52:35,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957639747] [2020-10-27 01:52:35,109 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 01:52:35,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:52:35,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 01:52:35,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 01:52:35,111 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand 7 states. [2020-10-27 01:52:35,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:52:35,367 INFO L93 Difference]: Finished difference Result 47 states and 56 transitions. [2020-10-27 01:52:35,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 01:52:35,368 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 17 [2020-10-27 01:52:35,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:52:35,368 INFO L225 Difference]: With dead ends: 47 [2020-10-27 01:52:35,369 INFO L226 Difference]: Without dead ends: 28 [2020-10-27 01:52:35,371 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:52:35,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-27 01:52:35,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2020-10-27 01:52:35,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-27 01:52:35,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2020-10-27 01:52:35,389 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 17 [2020-10-27 01:52:35,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:52:35,389 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2020-10-27 01:52:35,389 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 01:52:35,390 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2020-10-27 01:52:35,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-27 01:52:35,390 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:52:35,391 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:52:35,391 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 01:52:35,391 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:52:35,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:52:35,392 INFO L82 PathProgramCache]: Analyzing trace with hash -488595443, now seen corresponding path program 4 times [2020-10-27 01:52:35,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:52:35,393 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1978784308] [2020-10-27 01:52:35,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:52:35,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:52:35,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:52:35,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:52:35,712 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:52:35,712 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-27 01:52:35,713 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:52:35,713 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 305 [2020-10-27 01:52:35,713 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:52:35,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 01:52:35,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 01:52:35,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 01:52:35,714 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:52:35,832 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:52:35,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:52:35,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:52:35,844 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:52:35,844 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:52:35,845 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:52:35,845 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 01:52:35,845 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:52:35,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:52:35,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:52:35,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:52:35,846 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:52:35,850 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:52:35,850 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1978784308] [2020-10-27 01:52:35,851 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:52:35,851 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 01:52:35,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815525314] [2020-10-27 01:52:35,852 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 01:52:35,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:52:35,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 01:52:35,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-27 01:52:35,853 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand 8 states. [2020-10-27 01:52:36,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:52:36,165 INFO L93 Difference]: Finished difference Result 49 states and 58 transitions. [2020-10-27 01:52:36,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 01:52:36,165 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 18 [2020-10-27 01:52:36,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:52:36,166 INFO L225 Difference]: With dead ends: 49 [2020-10-27 01:52:36,166 INFO L226 Difference]: Without dead ends: 29 [2020-10-27 01:52:36,167 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:52:36,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-27 01:52:36,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2020-10-27 01:52:36,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-27 01:52:36,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2020-10-27 01:52:36,176 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 18 [2020-10-27 01:52:36,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:52:36,177 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2020-10-27 01:52:36,177 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 01:52:36,177 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2020-10-27 01:52:36,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-27 01:52:36,178 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:52:36,178 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:52:36,178 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 01:52:36,178 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:52:36,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:52:36,179 INFO L82 PathProgramCache]: Analyzing trace with hash -1446192210, now seen corresponding path program 5 times [2020-10-27 01:52:36,179 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:52:36,179 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1474463476] [2020-10-27 01:52:36,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:52:36,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:52:36,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:52:36,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:52:36,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:52:36,639 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:52:36,640 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-27 01:52:36,640 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:52:36,640 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 450 [2020-10-27 01:52:36,640 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:52:36,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 01:52:36,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 01:52:36,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 01:52:36,641 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:52:36,794 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:52:36,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:52:36,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:52:36,800 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:52:36,800 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:52:36,800 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:52:36,801 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:52:36,801 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:52:36,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:52:36,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:52:36,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:52:36,801 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:52:36,805 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:52:36,805 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1474463476] [2020-10-27 01:52:36,805 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:52:36,806 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:52:36,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937647667] [2020-10-27 01:52:36,806 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:52:36,806 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:52:36,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:52:36,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:52:36,807 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 11 states. [2020-10-27 01:52:37,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:52:37,311 INFO L93 Difference]: Finished difference Result 51 states and 60 transitions. [2020-10-27 01:52:37,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 01:52:37,312 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2020-10-27 01:52:37,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:52:37,313 INFO L225 Difference]: With dead ends: 51 [2020-10-27 01:52:37,313 INFO L226 Difference]: Without dead ends: 30 [2020-10-27 01:52:37,315 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2020-10-27 01:52:37,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-27 01:52:37,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2020-10-27 01:52:37,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-27 01:52:37,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2020-10-27 01:52:37,332 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 19 [2020-10-27 01:52:37,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:52:37,332 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2020-10-27 01:52:37,332 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:52:37,333 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2020-10-27 01:52:37,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-27 01:52:37,333 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:52:37,334 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:52:37,334 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 01:52:37,334 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:52:37,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:52:37,335 INFO L82 PathProgramCache]: Analyzing trace with hash -1066920915, now seen corresponding path program 6 times [2020-10-27 01:52:37,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:52:37,335 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1506573352] [2020-10-27 01:52:37,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:52:37,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:52:37,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:52:37,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:52:37,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:52:37,983 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:52:37,983 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-27 01:52:37,983 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:52:37,983 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 627 [2020-10-27 01:52:37,984 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:52:37,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 01:52:37,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 01:52:37,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-27 01:52:37,984 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:52:38,123 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:52:38,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:52:38,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:52:38,130 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:52:38,131 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:52:38,131 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:52:38,131 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 01:52:38,131 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:52:38,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:52:38,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:52:38,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:52:38,132 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:52:38,135 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:52:38,136 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1506573352] [2020-10-27 01:52:38,136 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:52:38,136 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 01:52:38,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690007435] [2020-10-27 01:52:38,136 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 01:52:38,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:52:38,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 01:52:38,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-27 01:52:38,138 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand 10 states. [2020-10-27 01:52:38,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:52:38,518 INFO L93 Difference]: Finished difference Result 53 states and 62 transitions. [2020-10-27 01:52:38,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 01:52:38,519 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 20 [2020-10-27 01:52:38,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:52:38,520 INFO L225 Difference]: With dead ends: 53 [2020-10-27 01:52:38,520 INFO L226 Difference]: Without dead ends: 31 [2020-10-27 01:52:38,521 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-10-27 01:52:38,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-27 01:52:38,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2020-10-27 01:52:38,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-27 01:52:38,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2020-10-27 01:52:38,553 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 20 [2020-10-27 01:52:38,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:52:38,553 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2020-10-27 01:52:38,553 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 01:52:38,553 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2020-10-27 01:52:38,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-27 01:52:38,554 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:52:38,554 INFO L422 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:52:38,554 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 01:52:38,554 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:52:38,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:52:38,555 INFO L82 PathProgramCache]: Analyzing trace with hash 2100554638, now seen corresponding path program 7 times [2020-10-27 01:52:38,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:52:38,555 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1360618903] [2020-10-27 01:52:38,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:52:38,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:52:38,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:52:38,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:52:38,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:52:39,155 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:52:39,155 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-27 01:52:39,156 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:52:39,156 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 590 [2020-10-27 01:52:39,156 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:52:39,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 01:52:39,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 01:52:39,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 01:52:39,157 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:52:39,358 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:52:39,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:52:39,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:52:39,366 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:52:39,366 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:52:39,366 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:52:39,366 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:52:39,366 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:52:39,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:52:39,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:52:39,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:52:39,367 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:52:39,371 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:52:39,371 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1360618903] [2020-10-27 01:52:39,371 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:52:39,371 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 01:52:39,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175171477] [2020-10-27 01:52:39,372 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 01:52:39,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:52:39,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 01:52:39,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:52:39,373 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand 13 states. [2020-10-27 01:52:39,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:52:39,942 INFO L93 Difference]: Finished difference Result 55 states and 64 transitions. [2020-10-27 01:52:39,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 01:52:39,942 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 21 [2020-10-27 01:52:39,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:52:39,943 INFO L225 Difference]: With dead ends: 55 [2020-10-27 01:52:39,943 INFO L226 Difference]: Without dead ends: 32 [2020-10-27 01:52:39,944 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2020-10-27 01:52:39,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-27 01:52:39,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2020-10-27 01:52:39,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-27 01:52:39,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2020-10-27 01:52:39,960 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 21 [2020-10-27 01:52:39,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:52:39,960 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2020-10-27 01:52:39,960 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 01:52:39,960 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2020-10-27 01:52:39,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-27 01:52:39,964 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:52:39,964 INFO L422 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:52:39,964 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 01:52:39,965 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:52:39,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:52:39,965 INFO L82 PathProgramCache]: Analyzing trace with hash 1508048973, now seen corresponding path program 8 times [2020-10-27 01:52:39,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:52:39,966 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [224745923] [2020-10-27 01:52:39,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:52:39,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:52:39,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:52:40,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:52:40,441 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:52:40,441 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-27 01:52:40,441 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:52:40,441 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 461 [2020-10-27 01:52:40,442 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:52:40,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 01:52:40,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 01:52:40,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 01:52:40,442 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:52:40,625 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:52:40,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:52:40,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:52:40,636 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:52:40,636 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:52:40,636 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:52:40,637 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 01:52:40,637 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:52:40,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:52:40,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:52:40,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:52:40,637 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:52:40,645 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:52:40,645 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [224745923] [2020-10-27 01:52:40,646 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:52:40,647 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 01:52:40,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119981453] [2020-10-27 01:52:40,647 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 01:52:40,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:52:40,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 01:52:40,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-10-27 01:52:40,649 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand 12 states. [2020-10-27 01:52:41,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:52:41,223 INFO L93 Difference]: Finished difference Result 57 states and 66 transitions. [2020-10-27 01:52:41,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 01:52:41,224 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 22 [2020-10-27 01:52:41,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:52:41,225 INFO L225 Difference]: With dead ends: 57 [2020-10-27 01:52:41,225 INFO L226 Difference]: Without dead ends: 33 [2020-10-27 01:52:41,227 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2020-10-27 01:52:41,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-27 01:52:41,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2020-10-27 01:52:41,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-27 01:52:41,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2020-10-27 01:52:41,241 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 22 [2020-10-27 01:52:41,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:52:41,241 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2020-10-27 01:52:41,242 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 01:52:41,242 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2020-10-27 01:52:41,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-27 01:52:41,243 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:52:41,243 INFO L422 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:52:41,243 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 01:52:41,243 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:52:41,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:52:41,244 INFO L82 PathProgramCache]: Analyzing trace with hash 320242542, now seen corresponding path program 9 times [2020-10-27 01:52:41,244 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:52:41,244 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1032545570] [2020-10-27 01:52:41,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:52:41,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:52:41,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:52:41,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:52:41,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:52:42,092 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:52:42,092 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-27 01:52:42,092 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:52:42,092 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 836 [2020-10-27 01:52:42,092 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:52:42,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 01:52:42,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 01:52:42,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-27 01:52:42,093 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:52:42,336 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:52:42,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:52:42,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:52:42,370 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:52:42,370 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:52:42,370 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:52:42,370 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 31 [2020-10-27 01:52:42,371 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:52:42,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:52:42,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:52:42,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:52:42,371 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:52:42,376 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:52:42,376 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1032545570] [2020-10-27 01:52:42,377 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:52:42,377 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 01:52:42,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045702711] [2020-10-27 01:52:42,377 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 01:52:42,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:52:42,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 01:52:42,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2020-10-27 01:52:42,379 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand 15 states. [2020-10-27 01:52:43,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:52:43,233 INFO L93 Difference]: Finished difference Result 59 states and 68 transitions. [2020-10-27 01:52:43,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 01:52:43,233 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 23 [2020-10-27 01:52:43,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:52:43,234 INFO L225 Difference]: With dead ends: 59 [2020-10-27 01:52:43,234 INFO L226 Difference]: Without dead ends: 34 [2020-10-27 01:52:43,235 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=67, Invalid=533, Unknown=0, NotChecked=0, Total=600 [2020-10-27 01:52:43,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-27 01:52:43,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2020-10-27 01:52:43,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-27 01:52:43,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2020-10-27 01:52:43,245 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 23 [2020-10-27 01:52:43,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:52:43,246 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2020-10-27 01:52:43,246 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 01:52:43,246 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2020-10-27 01:52:43,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-27 01:52:43,247 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:52:43,247 INFO L422 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:52:43,247 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 01:52:43,247 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:52:43,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:52:43,248 INFO L82 PathProgramCache]: Analyzing trace with hash -2142018451, now seen corresponding path program 10 times [2020-10-27 01:52:43,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:52:43,248 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1909564783] [2020-10-27 01:52:43,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:52:43,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:52:43,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:52:43,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:52:43,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:52:44,101 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:52:44,102 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-27 01:52:44,102 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:52:44,102 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 842 [2020-10-27 01:52:44,102 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:52:44,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 01:52:44,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 01:52:44,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 01:52:44,103 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:52:44,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:52:44,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:52:44,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:52:44,336 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:52:44,336 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:52:44,336 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:52:44,336 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:52:44,336 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:52:44,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:52:44,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:52:44,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:52:44,337 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:52:44,343 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:52:44,345 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1909564783] [2020-10-27 01:52:44,345 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:52:44,345 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 01:52:44,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946476833] [2020-10-27 01:52:44,346 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 01:52:44,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:52:44,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 01:52:44,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2020-10-27 01:52:44,347 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand 14 states. [2020-10-27 01:52:45,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:52:45,026 INFO L93 Difference]: Finished difference Result 61 states and 70 transitions. [2020-10-27 01:52:45,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 01:52:45,027 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 24 [2020-10-27 01:52:45,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:52:45,028 INFO L225 Difference]: With dead ends: 61 [2020-10-27 01:52:45,029 INFO L226 Difference]: Without dead ends: 35 [2020-10-27 01:52:45,030 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=99, Invalid=501, Unknown=0, NotChecked=0, Total=600 [2020-10-27 01:52:45,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-27 01:52:45,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2020-10-27 01:52:45,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-27 01:52:45,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2020-10-27 01:52:45,039 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 24 [2020-10-27 01:52:45,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:52:45,039 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2020-10-27 01:52:45,039 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 01:52:45,039 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2020-10-27 01:52:45,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-27 01:52:45,040 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:52:45,040 INFO L422 BasicCegarLoop]: trace histogram [11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:52:45,040 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 01:52:45,041 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:52:45,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:52:45,041 INFO L82 PathProgramCache]: Analyzing trace with hash -1162697906, now seen corresponding path program 11 times [2020-10-27 01:52:45,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:52:45,042 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [19221430] [2020-10-27 01:52:45,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:52:45,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:52:45,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:52:45,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:52:45,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:52:46,124 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:52:46,124 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-27 01:52:46,124 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:52:46,124 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1069 [2020-10-27 01:52:46,125 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:52:46,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 01:52:46,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 01:52:46,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-27 01:52:46,125 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:52:46,359 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:52:46,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:52:46,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:52:46,366 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:52:46,366 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:52:46,366 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:52:46,367 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:52:46,367 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:52:46,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:52:46,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:52:46,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:52:46,367 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:52:46,372 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:52:46,373 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [19221430] [2020-10-27 01:52:46,373 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:52:46,374 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 01:52:46,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042279258] [2020-10-27 01:52:46,375 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 01:52:46,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:52:46,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 01:52:46,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2020-10-27 01:52:46,376 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand 15 states. [2020-10-27 01:52:47,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:52:47,114 INFO L93 Difference]: Finished difference Result 63 states and 72 transitions. [2020-10-27 01:52:47,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 01:52:47,115 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 25 [2020-10-27 01:52:47,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:52:47,116 INFO L225 Difference]: With dead ends: 63 [2020-10-27 01:52:47,116 INFO L226 Difference]: Without dead ends: 36 [2020-10-27 01:52:47,117 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=108, Invalid=594, Unknown=0, NotChecked=0, Total=702 [2020-10-27 01:52:47,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-27 01:52:47,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2020-10-27 01:52:47,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-27 01:52:47,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2020-10-27 01:52:47,130 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 25 [2020-10-27 01:52:47,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:52:47,131 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2020-10-27 01:52:47,131 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 01:52:47,131 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2020-10-27 01:52:47,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-27 01:52:47,132 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:52:47,133 INFO L422 BasicCegarLoop]: trace histogram [12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:52:47,133 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 01:52:47,134 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:52:47,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:52:47,134 INFO L82 PathProgramCache]: Analyzing trace with hash -868532083, now seen corresponding path program 12 times [2020-10-27 01:52:47,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:52:47,135 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [59420443] [2020-10-27 01:52:47,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:52:47,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:52:47,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:52:47,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:52:48,086 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:52:48,086 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-27 01:52:48,086 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:52:48,086 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 936 [2020-10-27 01:52:48,087 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:52:48,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 01:52:48,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 01:52:48,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 01:52:48,087 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:52:48,379 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:52:48,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:52:48,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:52:48,387 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:52:48,387 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:52:48,387 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:52:48,388 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 01:52:48,388 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:52:48,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:52:48,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:52:48,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:52:48,388 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:52:48,395 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:52:48,395 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [59420443] [2020-10-27 01:52:48,399 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:52:48,399 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 01:52:48,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195515538] [2020-10-27 01:52:48,401 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 01:52:48,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:52:48,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 01:52:48,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2020-10-27 01:52:48,402 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand 16 states. [2020-10-27 01:52:49,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:52:49,280 INFO L93 Difference]: Finished difference Result 65 states and 74 transitions. [2020-10-27 01:52:49,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 01:52:49,281 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 26 [2020-10-27 01:52:49,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:52:49,282 INFO L225 Difference]: With dead ends: 65 [2020-10-27 01:52:49,282 INFO L226 Difference]: Without dead ends: 37 [2020-10-27 01:52:49,283 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=117, Invalid=695, Unknown=0, NotChecked=0, Total=812 [2020-10-27 01:52:49,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-27 01:52:49,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2020-10-27 01:52:49,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-27 01:52:49,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2020-10-27 01:52:49,295 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 26 [2020-10-27 01:52:49,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:52:49,296 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2020-10-27 01:52:49,296 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 01:52:49,296 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2020-10-27 01:52:49,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-27 01:52:49,297 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:52:49,297 INFO L422 BasicCegarLoop]: trace histogram [13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:52:49,297 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-27 01:52:49,297 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:52:49,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:52:49,298 INFO L82 PathProgramCache]: Analyzing trace with hash -339326162, now seen corresponding path program 13 times [2020-10-27 01:52:49,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:52:49,298 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [34500572] [2020-10-27 01:52:49,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:52:49,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:52:49,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:52:49,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:52:49,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:52:50,512 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:52:50,513 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-27 01:52:50,513 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:52:50,513 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1197 [2020-10-27 01:52:50,513 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:52:50,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 01:52:50,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 01:52:50,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-27 01:52:50,514 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:52:50,806 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:52:50,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:52:50,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:52:50,812 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:52:50,812 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:52:50,812 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:52:50,812 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:52:50,812 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:52:50,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:52:50,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:52:50,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:52:50,813 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:52:50,817 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:52:50,817 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [34500572] [2020-10-27 01:52:50,818 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:52:50,818 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-27 01:52:50,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418139248] [2020-10-27 01:52:50,818 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-27 01:52:50,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:52:50,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-27 01:52:50,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2020-10-27 01:52:50,819 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand 17 states. [2020-10-27 01:52:51,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:52:51,747 INFO L93 Difference]: Finished difference Result 67 states and 76 transitions. [2020-10-27 01:52:51,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 01:52:51,747 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 27 [2020-10-27 01:52:51,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:52:51,748 INFO L225 Difference]: With dead ends: 67 [2020-10-27 01:52:51,748 INFO L226 Difference]: Without dead ends: 38 [2020-10-27 01:52:51,749 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=126, Invalid=804, Unknown=0, NotChecked=0, Total=930 [2020-10-27 01:52:51,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-27 01:52:51,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2020-10-27 01:52:51,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-27 01:52:51,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2020-10-27 01:52:51,759 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 27 [2020-10-27 01:52:51,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:52:51,759 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2020-10-27 01:52:51,759 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-27 01:52:51,759 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2020-10-27 01:52:51,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-27 01:52:51,760 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:52:51,760 INFO L422 BasicCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:52:51,760 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-27 01:52:51,760 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:52:51,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:52:51,761 INFO L82 PathProgramCache]: Analyzing trace with hash -1113811795, now seen corresponding path program 14 times [2020-10-27 01:52:51,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:52:51,761 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [121711082] [2020-10-27 01:52:51,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:52:51,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:52:51,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:52:51,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:52:51,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:52:53,025 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:52:53,026 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-27 01:52:53,026 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:52:53,026 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1253 [2020-10-27 01:52:53,026 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:52:53,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-27 01:52:53,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 01:52:53,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-27 01:52:53,027 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:52:53,376 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:52:53,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:52:53,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:52:53,382 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:52:53,382 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:52:53,383 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:52:53,383 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:52:53,383 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:52:53,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:52:53,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:52:53,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:52:53,384 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:52:53,388 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:52:53,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [121711082] [2020-10-27 01:52:53,388 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:52:53,388 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-27 01:52:53,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867710178] [2020-10-27 01:52:53,391 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-27 01:52:53,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:52:53,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-27 01:52:53,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2020-10-27 01:52:53,395 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand 18 states. [2020-10-27 01:52:54,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:52:54,452 INFO L93 Difference]: Finished difference Result 69 states and 78 transitions. [2020-10-27 01:52:54,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 01:52:54,452 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 28 [2020-10-27 01:52:54,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:52:54,453 INFO L225 Difference]: With dead ends: 69 [2020-10-27 01:52:54,455 INFO L226 Difference]: Without dead ends: 39 [2020-10-27 01:52:54,457 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=135, Invalid=921, Unknown=0, NotChecked=0, Total=1056 [2020-10-27 01:52:54,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-27 01:52:54,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2020-10-27 01:52:54,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-27 01:52:54,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2020-10-27 01:52:54,476 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 28 [2020-10-27 01:52:54,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:52:54,477 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2020-10-27 01:52:54,477 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-27 01:52:54,477 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2020-10-27 01:52:54,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-27 01:52:54,477 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:52:54,477 INFO L422 BasicCegarLoop]: trace histogram [15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:52:54,478 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-27 01:52:54,478 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:52:54,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:52:54,478 INFO L82 PathProgramCache]: Analyzing trace with hash 646937358, now seen corresponding path program 15 times [2020-10-27 01:52:54,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:52:54,478 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1392201923] [2020-10-27 01:52:54,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:52:54,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:52:54,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:52:54,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:52:54,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:52:55,832 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:52:55,833 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-27 01:52:55,833 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:52:55,833 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1339 [2020-10-27 01:52:55,833 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:52:55,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-27 01:52:55,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 01:52:55,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-27 01:52:55,833 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:52:56,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:52:56,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:52:56,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:52:56,278 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:52:56,280 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:52:56,280 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:52:56,280 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 01:52:56,280 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:52:56,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:52:56,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:52:56,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:52:56,281 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:52:56,292 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:52:56,292 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1392201923] [2020-10-27 01:52:56,292 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:52:56,293 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-27 01:52:56,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899088627] [2020-10-27 01:52:56,293 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-27 01:52:56,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:52:56,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-27 01:52:56,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2020-10-27 01:52:56,295 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand 21 states. [2020-10-27 01:52:57,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:52:57,546 INFO L93 Difference]: Finished difference Result 71 states and 80 transitions. [2020-10-27 01:52:57,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 01:52:57,546 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 29 [2020-10-27 01:52:57,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:52:57,547 INFO L225 Difference]: With dead ends: 71 [2020-10-27 01:52:57,547 INFO L226 Difference]: Without dead ends: 40 [2020-10-27 01:52:57,548 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=103, Invalid=1229, Unknown=0, NotChecked=0, Total=1332 [2020-10-27 01:52:57,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-27 01:52:57,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2020-10-27 01:52:57,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-27 01:52:57,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2020-10-27 01:52:57,557 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 29 [2020-10-27 01:52:57,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:52:57,558 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2020-10-27 01:52:57,558 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-27 01:52:57,558 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2020-10-27 01:52:57,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-27 01:52:57,558 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:52:57,558 INFO L422 BasicCegarLoop]: trace histogram [16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:52:57,559 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-27 01:52:57,559 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:52:57,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:52:57,559 INFO L82 PathProgramCache]: Analyzing trace with hash -604413747, now seen corresponding path program 16 times [2020-10-27 01:52:57,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:52:57,560 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1846018062] [2020-10-27 01:52:57,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:52:57,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:52:57,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:52:57,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:52:58,587 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:52:58,587 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-27 01:52:58,587 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:52:58,587 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1015 [2020-10-27 01:52:58,588 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:52:58,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-27 01:52:58,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 01:52:58,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-27 01:52:58,588 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:52:58,990 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:52:58,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:52:58,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:52:59,002 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:52:59,002 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:52:59,002 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:52:59,002 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 01:52:59,003 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:52:59,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:52:59,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:52:59,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:52:59,003 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:52:59,008 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:52:59,008 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1846018062] [2020-10-27 01:52:59,009 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:52:59,009 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-27 01:52:59,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436978591] [2020-10-27 01:52:59,010 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-27 01:52:59,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:52:59,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-27 01:52:59,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2020-10-27 01:52:59,012 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand 20 states. [2020-10-27 01:53:00,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:53:00,149 INFO L93 Difference]: Finished difference Result 73 states and 82 transitions. [2020-10-27 01:53:00,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 01:53:00,149 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 30 [2020-10-27 01:53:00,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:53:00,150 INFO L225 Difference]: With dead ends: 73 [2020-10-27 01:53:00,150 INFO L226 Difference]: Without dead ends: 41 [2020-10-27 01:53:00,152 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=153, Invalid=1179, Unknown=0, NotChecked=0, Total=1332 [2020-10-27 01:53:00,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-27 01:53:00,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2020-10-27 01:53:00,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-27 01:53:00,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2020-10-27 01:53:00,171 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 30 [2020-10-27 01:53:00,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:53:00,171 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2020-10-27 01:53:00,171 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-27 01:53:00,171 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2020-10-27 01:53:00,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-27 01:53:00,172 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:53:00,172 INFO L422 BasicCegarLoop]: trace histogram [17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:53:00,172 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-27 01:53:00,172 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:53:00,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:53:00,173 INFO L82 PathProgramCache]: Analyzing trace with hash -741592338, now seen corresponding path program 17 times [2020-10-27 01:53:00,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:53:00,173 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [662715341] [2020-10-27 01:53:00,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:53:00,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:53:00,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:53:00,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:53:00,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:53:02,020 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:53:02,020 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-27 01:53:02,020 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:53:02,020 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1833 [2020-10-27 01:53:02,020 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:53:02,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-27 01:53:02,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 01:53:02,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-27 01:53:02,021 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:53:02,497 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:53:02,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:53:02,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:53:02,504 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:53:02,504 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:53:02,504 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:53:02,504 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:53:02,504 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:53:02,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:53:02,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:53:02,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:53:02,505 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:53:02,509 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:53:02,510 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [662715341] [2020-10-27 01:53:02,510 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:53:02,510 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-27 01:53:02,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413792313] [2020-10-27 01:53:02,510 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-27 01:53:02,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:53:02,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-27 01:53:02,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2020-10-27 01:53:02,512 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand 21 states. [2020-10-27 01:53:03,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:53:03,861 INFO L93 Difference]: Finished difference Result 75 states and 84 transitions. [2020-10-27 01:53:03,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-27 01:53:03,862 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 31 [2020-10-27 01:53:03,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:53:03,862 INFO L225 Difference]: With dead ends: 75 [2020-10-27 01:53:03,862 INFO L226 Difference]: Without dead ends: 42 [2020-10-27 01:53:03,865 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=162, Invalid=1320, Unknown=0, NotChecked=0, Total=1482 [2020-10-27 01:53:03,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-27 01:53:03,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2020-10-27 01:53:03,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-27 01:53:03,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2020-10-27 01:53:03,885 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 31 [2020-10-27 01:53:03,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:53:03,885 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2020-10-27 01:53:03,885 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-27 01:53:03,886 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2020-10-27 01:53:03,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-27 01:53:03,889 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:53:03,889 INFO L422 BasicCegarLoop]: trace histogram [18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:53:03,890 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-27 01:53:03,890 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:53:03,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:53:03,890 INFO L82 PathProgramCache]: Analyzing trace with hash -699161363, now seen corresponding path program 18 times [2020-10-27 01:53:03,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:53:03,891 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1768007601] [2020-10-27 01:53:03,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:53:03,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:53:03,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:53:04,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:53:04,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:53:05,835 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:53:05,835 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-27 01:53:05,835 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:53:05,835 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1923 [2020-10-27 01:53:05,836 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:53:05,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-27 01:53:05,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 01:53:05,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-27 01:53:05,837 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:53:06,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:53:06,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:53:06,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:53:06,339 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:53:06,339 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:53:06,339 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:53:06,339 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:53:06,339 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:53:06,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:53:06,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:53:06,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:53:06,340 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:53:06,344 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:53:06,345 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1768007601] [2020-10-27 01:53:06,345 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:53:06,345 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-27 01:53:06,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621298113] [2020-10-27 01:53:06,346 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-27 01:53:06,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:53:06,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-27 01:53:06,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2020-10-27 01:53:06,347 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand 22 states. [2020-10-27 01:53:07,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:53:07,820 INFO L93 Difference]: Finished difference Result 77 states and 86 transitions. [2020-10-27 01:53:07,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-27 01:53:07,822 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 32 [2020-10-27 01:53:07,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:53:07,823 INFO L225 Difference]: With dead ends: 77 [2020-10-27 01:53:07,823 INFO L226 Difference]: Without dead ends: 43 [2020-10-27 01:53:07,824 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=171, Invalid=1469, Unknown=0, NotChecked=0, Total=1640 [2020-10-27 01:53:07,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-27 01:53:07,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2020-10-27 01:53:07,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-27 01:53:07,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2020-10-27 01:53:07,832 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 32 [2020-10-27 01:53:07,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:53:07,832 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2020-10-27 01:53:07,832 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-27 01:53:07,832 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2020-10-27 01:53:07,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-27 01:53:07,833 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:53:07,833 INFO L422 BasicCegarLoop]: trace histogram [19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:53:07,833 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-27 01:53:07,833 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:53:07,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:53:07,834 INFO L82 PathProgramCache]: Analyzing trace with hash 616198862, now seen corresponding path program 19 times [2020-10-27 01:53:07,834 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:53:07,834 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [162637239] [2020-10-27 01:53:07,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:53:07,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:53:07,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:53:07,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:53:08,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:53:09,662 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:53:09,663 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-27 01:53:09,663 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:53:09,663 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1813 [2020-10-27 01:53:09,663 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:53:09,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-27 01:53:09,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 01:53:09,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-27 01:53:09,664 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:53:10,166 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:53:10,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:53:10,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:53:10,172 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:53:10,172 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:53:10,173 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:53:10,173 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:53:10,173 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:53:10,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:53:10,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:53:10,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:53:10,173 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:53:10,178 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:53:10,178 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [162637239] [2020-10-27 01:53:10,178 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:53:10,178 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-27 01:53:10,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827185370] [2020-10-27 01:53:10,179 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-27 01:53:10,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:53:10,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-27 01:53:10,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2020-10-27 01:53:10,180 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand 23 states. [2020-10-27 01:53:11,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:53:11,865 INFO L93 Difference]: Finished difference Result 79 states and 88 transitions. [2020-10-27 01:53:11,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-27 01:53:11,865 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 33 [2020-10-27 01:53:11,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:53:11,866 INFO L225 Difference]: With dead ends: 79 [2020-10-27 01:53:11,866 INFO L226 Difference]: Without dead ends: 44 [2020-10-27 01:53:11,868 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=180, Invalid=1626, Unknown=0, NotChecked=0, Total=1806 [2020-10-27 01:53:11,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-27 01:53:11,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2020-10-27 01:53:11,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-27 01:53:11,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2020-10-27 01:53:11,876 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 33 [2020-10-27 01:53:11,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:53:11,876 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2020-10-27 01:53:11,877 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-27 01:53:11,877 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2020-10-27 01:53:11,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-27 01:53:11,877 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:53:11,877 INFO L422 BasicCegarLoop]: trace histogram [20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:53:11,877 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-27 01:53:11,877 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:53:11,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:53:11,878 INFO L82 PathProgramCache]: Analyzing trace with hash -1557307123, now seen corresponding path program 20 times [2020-10-27 01:53:11,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:53:11,878 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1572952492] [2020-10-27 01:53:11,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:53:11,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:53:11,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:53:11,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:53:12,938 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:53:12,938 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-27 01:53:12,938 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:53:12,938 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1048 [2020-10-27 01:53:12,938 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:53:12,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-27 01:53:12,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 01:53:12,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-27 01:53:12,939 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:53:13,481 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:53:13,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:53:13,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:53:13,487 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:53:13,488 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:53:13,488 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:53:13,488 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:53:13,488 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:53:13,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:53:13,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:53:13,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:53:13,488 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:53:13,494 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:53:13,494 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1572952492] [2020-10-27 01:53:13,494 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:53:13,494 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-27 01:53:13,494 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480898246] [2020-10-27 01:53:13,495 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-27 01:53:13,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:53:13,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-27 01:53:13,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2020-10-27 01:53:13,496 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand 24 states. [2020-10-27 01:53:15,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:53:15,180 INFO L93 Difference]: Finished difference Result 81 states and 90 transitions. [2020-10-27 01:53:15,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-27 01:53:15,181 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 34 [2020-10-27 01:53:15,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:53:15,181 INFO L225 Difference]: With dead ends: 81 [2020-10-27 01:53:15,181 INFO L226 Difference]: Without dead ends: 45 [2020-10-27 01:53:15,183 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=189, Invalid=1791, Unknown=0, NotChecked=0, Total=1980 [2020-10-27 01:53:15,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-27 01:53:15,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2020-10-27 01:53:15,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-27 01:53:15,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 48 transitions. [2020-10-27 01:53:15,192 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 48 transitions. Word has length 34 [2020-10-27 01:53:15,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:53:15,192 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 48 transitions. [2020-10-27 01:53:15,192 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-27 01:53:15,192 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 48 transitions. [2020-10-27 01:53:15,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-27 01:53:15,193 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:53:15,193 INFO L422 BasicCegarLoop]: trace histogram [21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:53:15,193 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-27 01:53:15,193 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:53:15,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:53:15,193 INFO L82 PathProgramCache]: Analyzing trace with hash -216515922, now seen corresponding path program 21 times [2020-10-27 01:53:15,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:53:15,194 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2060341428] [2020-10-27 01:53:15,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:53:15,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:53:15,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:53:15,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:53:15,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:53:16,909 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:53:16,909 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-27 01:53:16,909 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:53:16,910 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1701 [2020-10-27 01:53:16,910 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:53:16,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-27 01:53:16,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 01:53:16,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-27 01:53:16,910 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:53:17,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:53:17,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:53:17,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:53:17,571 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:53:17,572 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:53:17,572 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:53:17,572 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:53:17,572 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:53:17,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:53:17,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:53:17,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:53:17,573 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:53:17,578 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:53:17,578 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2060341428] [2020-10-27 01:53:17,578 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:53:17,578 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-27 01:53:17,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721497002] [2020-10-27 01:53:17,579 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-27 01:53:17,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:53:17,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-27 01:53:17,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=648, Unknown=0, NotChecked=0, Total=702 [2020-10-27 01:53:17,580 INFO L87 Difference]: Start difference. First operand 44 states and 48 transitions. Second operand 27 states. [2020-10-27 01:53:19,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:53:19,564 INFO L93 Difference]: Finished difference Result 83 states and 92 transitions. [2020-10-27 01:53:19,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-27 01:53:19,572 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 35 [2020-10-27 01:53:19,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:53:19,572 INFO L225 Difference]: With dead ends: 83 [2020-10-27 01:53:19,572 INFO L226 Difference]: Without dead ends: 46 [2020-10-27 01:53:19,573 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=148, Invalid=2204, Unknown=0, NotChecked=0, Total=2352 [2020-10-27 01:53:19,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-27 01:53:19,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2020-10-27 01:53:19,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-27 01:53:19,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2020-10-27 01:53:19,581 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 35 [2020-10-27 01:53:19,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:53:19,581 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2020-10-27 01:53:19,581 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-27 01:53:19,581 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2020-10-27 01:53:19,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-27 01:53:19,582 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:53:19,582 INFO L422 BasicCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:53:19,582 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-27 01:53:19,582 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:53:19,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:53:19,583 INFO L82 PathProgramCache]: Analyzing trace with hash -1601661651, now seen corresponding path program 22 times [2020-10-27 01:53:19,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:53:19,583 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [71145038] [2020-10-27 01:53:19,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:53:19,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:53:19,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:53:19,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:53:19,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:53:21,500 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:53:21,500 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-27 01:53:21,500 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:53:21,500 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1906 [2020-10-27 01:53:21,500 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:53:21,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-27 01:53:21,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 01:53:21,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-27 01:53:21,501 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:53:22,258 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:53:22,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:53:22,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:53:22,263 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:53:22,264 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:53:22,264 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:53:22,264 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:53:22,264 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:53:22,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:53:22,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:53:22,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:53:22,264 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:53:22,270 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:53:22,270 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [71145038] [2020-10-27 01:53:22,270 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:53:22,270 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-27 01:53:22,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997704035] [2020-10-27 01:53:22,271 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-27 01:53:22,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:53:22,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-27 01:53:22,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=703, Unknown=0, NotChecked=0, Total=756 [2020-10-27 01:53:22,272 INFO L87 Difference]: Start difference. First operand 45 states and 49 transitions. Second operand 28 states. [2020-10-27 01:53:24,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:53:24,422 INFO L93 Difference]: Finished difference Result 85 states and 94 transitions. [2020-10-27 01:53:24,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-27 01:53:24,425 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 36 [2020-10-27 01:53:24,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:53:24,425 INFO L225 Difference]: With dead ends: 85 [2020-10-27 01:53:24,426 INFO L226 Difference]: Without dead ends: 47 [2020-10-27 01:53:24,427 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=145, Invalid=2405, Unknown=0, NotChecked=0, Total=2550 [2020-10-27 01:53:24,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-27 01:53:24,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2020-10-27 01:53:24,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-27 01:53:24,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2020-10-27 01:53:24,437 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 36 [2020-10-27 01:53:24,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:53:24,437 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2020-10-27 01:53:24,437 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-27 01:53:24,437 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2020-10-27 01:53:24,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-27 01:53:24,438 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:53:24,438 INFO L422 BasicCegarLoop]: trace histogram [23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:53:24,438 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-27 01:53:24,438 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:53:24,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:53:24,439 INFO L82 PathProgramCache]: Analyzing trace with hash -1591506290, now seen corresponding path program 23 times [2020-10-27 01:53:24,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:53:24,439 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1372313778] [2020-10-27 01:53:24,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:53:24,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:53:24,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:53:24,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:53:25,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:53:26,295 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:53:26,295 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-27 01:53:26,296 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:53:26,296 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1840 [2020-10-27 01:53:26,296 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:53:26,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-27 01:53:26,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 01:53:26,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-27 01:53:26,296 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:53:26,977 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:53:26,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:53:26,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:53:26,983 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:53:26,983 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:53:26,983 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:53:26,984 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:53:26,984 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:53:26,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:53:26,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:53:26,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:53:26,984 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:53:26,989 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:53:26,990 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1372313778] [2020-10-27 01:53:26,990 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:53:26,990 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-27 01:53:26,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389649068] [2020-10-27 01:53:26,990 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-27 01:53:26,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:53:26,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-27 01:53:26,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=628, Unknown=0, NotChecked=0, Total=702 [2020-10-27 01:53:26,992 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand 27 states. [2020-10-27 01:53:29,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:53:29,019 INFO L93 Difference]: Finished difference Result 87 states and 96 transitions. [2020-10-27 01:53:29,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-27 01:53:29,020 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 37 [2020-10-27 01:53:29,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:53:29,021 INFO L225 Difference]: With dead ends: 87 [2020-10-27 01:53:29,021 INFO L226 Difference]: Without dead ends: 48 [2020-10-27 01:53:29,023 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=216, Invalid=2334, Unknown=0, NotChecked=0, Total=2550 [2020-10-27 01:53:29,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-27 01:53:29,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2020-10-27 01:53:29,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-27 01:53:29,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2020-10-27 01:53:29,033 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 37 [2020-10-27 01:53:29,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:53:29,033 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2020-10-27 01:53:29,033 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-27 01:53:29,033 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2020-10-27 01:53:29,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-27 01:53:29,033 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:53:29,034 INFO L422 BasicCegarLoop]: trace histogram [24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:53:29,034 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-27 01:53:29,034 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:53:29,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:53:29,034 INFO L82 PathProgramCache]: Analyzing trace with hash -1276690099, now seen corresponding path program 24 times [2020-10-27 01:53:29,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:53:29,035 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [407732857] [2020-10-27 01:53:29,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:53:29,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:53:29,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:53:29,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:53:30,563 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:53:30,563 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-27 01:53:30,563 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:53:30,563 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1512 [2020-10-27 01:53:30,563 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:53:30,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-27 01:53:30,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 01:53:30,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-27 01:53:30,563 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:53:31,337 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:53:31,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:53:31,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:53:31,343 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:53:31,343 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:53:31,343 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:53:31,343 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:53:31,344 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:53:31,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:53:31,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:53:31,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:53:31,344 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:53:31,348 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:53:31,348 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [407732857] [2020-10-27 01:53:31,348 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:53:31,348 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-27 01:53:31,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86148025] [2020-10-27 01:53:31,349 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-27 01:53:31,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:53:31,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-27 01:53:31,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=679, Unknown=0, NotChecked=0, Total=756 [2020-10-27 01:53:31,350 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand 28 states. [2020-10-27 01:53:33,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:53:33,629 INFO L93 Difference]: Finished difference Result 89 states and 98 transitions. [2020-10-27 01:53:33,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-27 01:53:33,629 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 38 [2020-10-27 01:53:33,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:53:33,630 INFO L225 Difference]: With dead ends: 89 [2020-10-27 01:53:33,630 INFO L226 Difference]: Without dead ends: 49 [2020-10-27 01:53:33,632 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=225, Invalid=2531, Unknown=0, NotChecked=0, Total=2756 [2020-10-27 01:53:33,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-27 01:53:33,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2020-10-27 01:53:33,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-27 01:53:33,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 52 transitions. [2020-10-27 01:53:33,642 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 52 transitions. Word has length 38 [2020-10-27 01:53:33,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:53:33,643 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 52 transitions. [2020-10-27 01:53:33,643 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-27 01:53:33,643 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 52 transitions. [2020-10-27 01:53:33,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-27 01:53:33,643 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:53:33,643 INFO L422 BasicCegarLoop]: trace histogram [25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:53:33,643 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-27 01:53:33,644 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:53:33,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:53:33,644 INFO L82 PathProgramCache]: Analyzing trace with hash -107322770, now seen corresponding path program 25 times [2020-10-27 01:53:33,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:53:33,644 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1850524449] [2020-10-27 01:53:33,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:53:33,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:53:33,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:53:33,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:53:34,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:53:35,701 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:53:35,702 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-27 01:53:35,702 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:53:35,702 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2043 [2020-10-27 01:53:35,702 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:53:35,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-27 01:53:35,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 01:53:35,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-27 01:53:35,702 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:53:36,645 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:53:36,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:53:36,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:53:36,651 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:53:36,651 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:53:36,651 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:53:36,652 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:53:36,652 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:53:36,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:53:36,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:53:36,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:53:36,652 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:53:36,658 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:53:36,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1850524449] [2020-10-27 01:53:36,659 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:53:36,659 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-27 01:53:36,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040338302] [2020-10-27 01:53:36,659 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-27 01:53:36,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:53:36,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-27 01:53:36,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=853, Unknown=0, NotChecked=0, Total=930 [2020-10-27 01:53:36,660 INFO L87 Difference]: Start difference. First operand 48 states and 52 transitions. Second operand 31 states. [2020-10-27 01:53:39,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:53:39,463 INFO L93 Difference]: Finished difference Result 65 states and 73 transitions. [2020-10-27 01:53:39,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-27 01:53:39,463 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 39 [2020-10-27 01:53:39,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:53:39,465 INFO L225 Difference]: With dead ends: 65 [2020-10-27 01:53:39,465 INFO L226 Difference]: Without dead ends: 62 [2020-10-27 01:53:39,468 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 408 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=232, Invalid=3308, Unknown=0, NotChecked=0, Total=3540 [2020-10-27 01:53:39,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-27 01:53:39,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 54. [2020-10-27 01:53:39,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-27 01:53:39,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 59 transitions. [2020-10-27 01:53:39,478 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 59 transitions. Word has length 39 [2020-10-27 01:53:39,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:53:39,478 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 59 transitions. [2020-10-27 01:53:39,478 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-27 01:53:39,478 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 59 transitions. [2020-10-27 01:53:39,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-27 01:53:39,479 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:53:39,479 INFO L422 BasicCegarLoop]: trace histogram [26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:53:39,479 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-27 01:53:39,479 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:53:39,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:53:39,480 INFO L82 PathProgramCache]: Analyzing trace with hash 1783326061, now seen corresponding path program 26 times [2020-10-27 01:53:39,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:53:39,480 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [806231026] [2020-10-27 01:53:39,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:53:39,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:53:39,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:53:39,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:53:41,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:53:43,326 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:53:43,327 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-27 01:53:43,327 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:53:43,327 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3830 [2020-10-27 01:53:43,327 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:53:43,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-27 01:53:43,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 01:53:43,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-27 01:53:43,327 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:53:44,139 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:53:44,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:53:44,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:53:44,144 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:53:44,144 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:53:44,144 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:53:44,144 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:53:44,144 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:53:44,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:53:44,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:53:44,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:53:44,145 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:53:44,149 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:53:44,150 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [806231026] [2020-10-27 01:53:44,150 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:53:44,150 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-27 01:53:44,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623145352] [2020-10-27 01:53:44,151 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-27 01:53:44,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:53:44,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-27 01:53:44,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=787, Unknown=0, NotChecked=0, Total=870 [2020-10-27 01:53:44,152 INFO L87 Difference]: Start difference. First operand 54 states and 59 transitions. Second operand 30 states. [2020-10-27 01:53:46,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:53:46,628 INFO L93 Difference]: Finished difference Result 98 states and 109 transitions. [2020-10-27 01:53:46,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-27 01:53:46,629 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 40 [2020-10-27 01:53:46,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:53:46,630 INFO L225 Difference]: With dead ends: 98 [2020-10-27 01:53:46,630 INFO L226 Difference]: Without dead ends: 51 [2020-10-27 01:53:46,632 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=243, Invalid=2949, Unknown=0, NotChecked=0, Total=3192 [2020-10-27 01:53:46,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-27 01:53:46,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2020-10-27 01:53:46,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-27 01:53:46,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2020-10-27 01:53:46,641 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 40 [2020-10-27 01:53:46,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:53:46,642 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2020-10-27 01:53:46,642 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-27 01:53:46,642 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2020-10-27 01:53:46,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-27 01:53:46,642 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:53:46,642 INFO L422 BasicCegarLoop]: trace histogram [27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:53:46,642 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-27 01:53:46,643 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:53:46,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:53:46,643 INFO L82 PathProgramCache]: Analyzing trace with hash 263897678, now seen corresponding path program 27 times [2020-10-27 01:53:46,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:53:46,643 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [544431712] [2020-10-27 01:53:46,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:53:46,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:53:46,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:53:46,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:53:48,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:53:49,254 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:53:49,254 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-27 01:53:49,254 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:53:49,254 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2597 [2020-10-27 01:53:49,254 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:53:49,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-27 01:53:49,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 01:53:49,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-27 01:53:49,255 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:53:50,198 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:53:50,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:53:50,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:53:50,203 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:53:50,203 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:53:50,203 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:53:50,203 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:53:50,203 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:53:50,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:53:50,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:53:50,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:53:50,204 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:53:50,211 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:53:50,212 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [544431712] [2020-10-27 01:53:50,214 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:53:50,214 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-27 01:53:50,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68322476] [2020-10-27 01:53:50,216 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-27 01:53:50,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:53:50,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-27 01:53:50,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=844, Unknown=0, NotChecked=0, Total=930 [2020-10-27 01:53:50,217 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand 31 states. [2020-10-27 01:53:52,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:53:52,804 INFO L93 Difference]: Finished difference Result 95 states and 104 transitions. [2020-10-27 01:53:52,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-27 01:53:52,805 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 41 [2020-10-27 01:53:52,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:53:52,806 INFO L225 Difference]: With dead ends: 95 [2020-10-27 01:53:52,806 INFO L226 Difference]: Without dead ends: 52 [2020-10-27 01:53:52,808 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=252, Invalid=3170, Unknown=0, NotChecked=0, Total=3422 [2020-10-27 01:53:52,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-27 01:53:52,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2020-10-27 01:53:52,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-27 01:53:52,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 55 transitions. [2020-10-27 01:53:52,819 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 55 transitions. Word has length 41 [2020-10-27 01:53:52,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:53:52,819 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 55 transitions. [2020-10-27 01:53:52,819 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-27 01:53:52,819 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 55 transitions. [2020-10-27 01:53:52,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-27 01:53:52,820 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:53:52,820 INFO L422 BasicCegarLoop]: trace histogram [28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:53:52,820 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-27 01:53:52,820 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:53:52,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:53:52,821 INFO L82 PathProgramCache]: Analyzing trace with hash 406258061, now seen corresponding path program 28 times [2020-10-27 01:53:52,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:53:52,821 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2066067400] [2020-10-27 01:53:52,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:53:52,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:53:52,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:53:53,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:53:54,143 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:53:54,143 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-27 01:53:54,143 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:53:54,143 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1308 [2020-10-27 01:53:54,143 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:53:54,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-27 01:53:54,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 01:53:54,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-27 01:53:54,144 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:53:55,053 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:53:55,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:53:55,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:53:55,057 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:53:55,058 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:53:55,058 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:53:55,058 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:53:55,058 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:53:55,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:53:55,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:53:55,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:53:55,058 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:53:55,063 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:53:55,064 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2066067400] [2020-10-27 01:53:55,064 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:53:55,064 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-27 01:53:55,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9575927] [2020-10-27 01:53:55,065 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-27 01:53:55,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:53:55,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-27 01:53:55,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=903, Unknown=0, NotChecked=0, Total=992 [2020-10-27 01:53:55,066 INFO L87 Difference]: Start difference. First operand 51 states and 55 transitions. Second operand 32 states. [2020-10-27 01:53:57,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:53:57,904 INFO L93 Difference]: Finished difference Result 97 states and 106 transitions. [2020-10-27 01:53:57,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-27 01:53:57,905 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 42 [2020-10-27 01:53:57,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:53:57,905 INFO L225 Difference]: With dead ends: 97 [2020-10-27 01:53:57,906 INFO L226 Difference]: Without dead ends: 53 [2020-10-27 01:53:57,908 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=261, Invalid=3399, Unknown=0, NotChecked=0, Total=3660 [2020-10-27 01:53:57,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-27 01:53:57,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2020-10-27 01:53:57,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-27 01:53:57,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 56 transitions. [2020-10-27 01:53:57,918 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 56 transitions. Word has length 42 [2020-10-27 01:53:57,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:53:57,918 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 56 transitions. [2020-10-27 01:53:57,918 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-27 01:53:57,918 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 56 transitions. [2020-10-27 01:53:57,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-27 01:53:57,919 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:53:57,919 INFO L422 BasicCegarLoop]: trace histogram [29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:53:57,919 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-27 01:53:57,919 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:53:57,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:53:57,919 INFO L82 PathProgramCache]: Analyzing trace with hash 524462638, now seen corresponding path program 29 times [2020-10-27 01:53:57,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:53:57,920 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [613260005] [2020-10-27 01:53:57,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:53:57,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:53:57,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:53:58,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:53:58,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:54:00,133 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:54:00,133 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-27 01:54:00,133 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:54:00,133 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2200 [2020-10-27 01:54:00,134 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:54:00,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-27 01:54:00,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 01:54:00,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-27 01:54:00,134 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:54:01,180 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:54:01,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:54:01,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:54:01,185 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:54:01,185 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:54:01,186 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:54:01,186 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:54:01,186 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:54:01,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:54:01,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:54:01,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:54:01,186 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:54:01,190 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:54:01,191 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [613260005] [2020-10-27 01:54:01,191 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:54:01,191 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-27 01:54:01,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396809934] [2020-10-27 01:54:01,191 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-27 01:54:01,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:54:01,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-27 01:54:01,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=964, Unknown=0, NotChecked=0, Total=1056 [2020-10-27 01:54:01,192 INFO L87 Difference]: Start difference. First operand 52 states and 56 transitions. Second operand 33 states. [2020-10-27 01:54:04,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:54:04,317 INFO L93 Difference]: Finished difference Result 99 states and 108 transitions. [2020-10-27 01:54:04,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-27 01:54:04,319 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 43 [2020-10-27 01:54:04,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:54:04,321 INFO L225 Difference]: With dead ends: 99 [2020-10-27 01:54:04,322 INFO L226 Difference]: Without dead ends: 54 [2020-10-27 01:54:04,323 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 436 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=270, Invalid=3636, Unknown=0, NotChecked=0, Total=3906 [2020-10-27 01:54:04,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-27 01:54:04,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2020-10-27 01:54:04,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-27 01:54:04,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 57 transitions. [2020-10-27 01:54:04,332 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 57 transitions. Word has length 43 [2020-10-27 01:54:04,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:54:04,332 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 57 transitions. [2020-10-27 01:54:04,332 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-27 01:54:04,332 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 57 transitions. [2020-10-27 01:54:04,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-27 01:54:04,333 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:54:04,333 INFO L422 BasicCegarLoop]: trace histogram [30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:54:04,333 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-27 01:54:04,333 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:54:04,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:54:04,334 INFO L82 PathProgramCache]: Analyzing trace with hash -106162771, now seen corresponding path program 30 times [2020-10-27 01:54:04,334 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:54:04,334 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [191931918] [2020-10-27 01:54:04,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:54:04,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:54:04,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:54:04,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:54:05,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:54:07,417 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:54:07,417 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-27 01:54:07,417 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:54:07,417 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3071 [2020-10-27 01:54:07,417 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:54:07,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-27 01:54:07,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 01:54:07,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-27 01:54:07,418 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:54:08,519 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:54:08,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:54:08,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:54:08,526 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:54:08,526 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:54:08,526 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:54:08,527 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:54:08,527 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:54:08,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:54:08,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:54:08,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:54:08,527 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:54:08,532 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:54:08,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [191931918] [2020-10-27 01:54:08,533 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:54:08,533 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-27 01:54:08,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527638223] [2020-10-27 01:54:08,533 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-27 01:54:08,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:54:08,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-27 01:54:08,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=1027, Unknown=0, NotChecked=0, Total=1122 [2020-10-27 01:54:08,535 INFO L87 Difference]: Start difference. First operand 53 states and 57 transitions. Second operand 34 states. [2020-10-27 01:54:11,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:54:11,856 INFO L93 Difference]: Finished difference Result 101 states and 110 transitions. [2020-10-27 01:54:11,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-27 01:54:11,857 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 44 [2020-10-27 01:54:11,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:54:11,858 INFO L225 Difference]: With dead ends: 101 [2020-10-27 01:54:11,858 INFO L226 Difference]: Without dead ends: 55 [2020-10-27 01:54:11,861 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 466 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=279, Invalid=3881, Unknown=0, NotChecked=0, Total=4160 [2020-10-27 01:54:11,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-27 01:54:11,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2020-10-27 01:54:11,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-27 01:54:11,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 58 transitions. [2020-10-27 01:54:11,871 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 58 transitions. Word has length 44 [2020-10-27 01:54:11,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:54:11,871 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 58 transitions. [2020-10-27 01:54:11,871 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-27 01:54:11,871 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 58 transitions. [2020-10-27 01:54:11,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-27 01:54:11,871 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:54:11,872 INFO L422 BasicCegarLoop]: trace histogram [31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:54:11,872 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-27 01:54:11,872 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:54:11,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:54:11,872 INFO L82 PathProgramCache]: Analyzing trace with hash 1819286030, now seen corresponding path program 31 times [2020-10-27 01:54:11,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:54:11,873 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [614399015] [2020-10-27 01:54:11,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:54:11,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:54:11,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:54:11,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:54:13,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:54:15,720 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:54:15,720 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-27 01:54:15,720 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:54:15,720 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3833 [2020-10-27 01:54:15,720 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:54:15,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-27 01:54:15,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 01:54:15,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-27 01:54:15,721 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:54:16,909 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:54:16,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:54:16,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:54:16,915 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:54:16,915 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:54:16,915 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:54:16,916 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:54:16,916 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:54:16,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:54:16,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:54:16,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:54:16,916 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:54:16,921 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:54:16,921 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [614399015] [2020-10-27 01:54:16,921 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:54:16,922 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-27 01:54:16,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972549496] [2020-10-27 01:54:16,922 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-27 01:54:16,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:54:16,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-27 01:54:16,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=1092, Unknown=0, NotChecked=0, Total=1190 [2020-10-27 01:54:16,923 INFO L87 Difference]: Start difference. First operand 54 states and 58 transitions. Second operand 35 states. [2020-10-27 01:54:20,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:54:20,419 INFO L93 Difference]: Finished difference Result 103 states and 112 transitions. [2020-10-27 01:54:20,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-27 01:54:20,420 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 45 [2020-10-27 01:54:20,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:54:20,421 INFO L225 Difference]: With dead ends: 103 [2020-10-27 01:54:20,421 INFO L226 Difference]: Without dead ends: 56 [2020-10-27 01:54:20,423 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 497 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=288, Invalid=4134, Unknown=0, NotChecked=0, Total=4422 [2020-10-27 01:54:20,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-27 01:54:20,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2020-10-27 01:54:20,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-27 01:54:20,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 59 transitions. [2020-10-27 01:54:20,433 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 59 transitions. Word has length 45 [2020-10-27 01:54:20,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:54:20,433 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 59 transitions. [2020-10-27 01:54:20,433 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-27 01:54:20,433 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 59 transitions. [2020-10-27 01:54:20,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-27 01:54:20,434 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:54:20,434 INFO L422 BasicCegarLoop]: trace histogram [32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:54:20,434 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-27 01:54:20,434 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:54:20,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:54:20,434 INFO L82 PathProgramCache]: Analyzing trace with hash 1378656717, now seen corresponding path program 32 times [2020-10-27 01:54:20,434 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:54:20,435 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2015025935] [2020-10-27 01:54:20,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:54:20,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:54:20,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:54:20,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:54:22,965 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:54:22,966 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-27 01:54:22,966 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:54:22,966 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2518 [2020-10-27 01:54:22,966 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:54:22,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-27 01:54:22,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 01:54:22,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-27 01:54:22,966 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:54:24,176 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:54:24,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:54:24,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:54:24,181 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:54:24,181 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:54:24,181 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:54:24,181 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:54:24,181 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:54:24,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:54:24,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:54:24,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:54:24,181 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:54:24,186 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:54:24,186 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2015025935] [2020-10-27 01:54:24,186 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:54:24,187 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-27 01:54:24,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086751574] [2020-10-27 01:54:24,187 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-27 01:54:24,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:54:24,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-27 01:54:24,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=1159, Unknown=0, NotChecked=0, Total=1260 [2020-10-27 01:54:24,188 INFO L87 Difference]: Start difference. First operand 55 states and 59 transitions. Second operand 36 states. [2020-10-27 01:54:27,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:54:27,877 INFO L93 Difference]: Finished difference Result 105 states and 114 transitions. [2020-10-27 01:54:27,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-27 01:54:27,878 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 46 [2020-10-27 01:54:27,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:54:27,879 INFO L225 Difference]: With dead ends: 105 [2020-10-27 01:54:27,879 INFO L226 Difference]: Without dead ends: 57 [2020-10-27 01:54:27,881 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 529 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=297, Invalid=4395, Unknown=0, NotChecked=0, Total=4692 [2020-10-27 01:54:27,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-27 01:54:27,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 56. [2020-10-27 01:54:27,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-27 01:54:27,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 60 transitions. [2020-10-27 01:54:27,892 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 60 transitions. Word has length 46 [2020-10-27 01:54:27,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:54:27,892 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 60 transitions. [2020-10-27 01:54:27,892 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-27 01:54:27,892 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 60 transitions. [2020-10-27 01:54:27,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-27 01:54:27,893 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:54:27,893 INFO L422 BasicCegarLoop]: trace histogram [33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:54:27,893 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-27 01:54:27,893 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:54:27,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:54:27,894 INFO L82 PathProgramCache]: Analyzing trace with hash 604049902, now seen corresponding path program 33 times [2020-10-27 01:54:27,894 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:54:27,894 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [160121002] [2020-10-27 01:54:27,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:54:27,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:54:27,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:54:27,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:54:29,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:54:31,458 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:54:31,458 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-27 01:54:31,458 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:54:31,458 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3548 [2020-10-27 01:54:31,459 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:54:31,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-27 01:54:31,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 01:54:31,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-27 01:54:31,459 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:54:32,792 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:54:32,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:54:32,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:54:32,798 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:54:32,798 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:54:32,798 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:54:32,798 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:54:32,798 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:54:32,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:54:32,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:54:32,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:54:32,799 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:54:32,806 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:54:32,807 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [160121002] [2020-10-27 01:54:32,807 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:54:32,807 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-27 01:54:32,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186045434] [2020-10-27 01:54:32,807 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-27 01:54:32,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:54:32,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-27 01:54:32,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=1383, Unknown=0, NotChecked=0, Total=1482 [2020-10-27 01:54:32,808 INFO L87 Difference]: Start difference. First operand 56 states and 60 transitions. Second operand 39 states. [2020-10-27 01:54:36,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:54:36,891 INFO L93 Difference]: Finished difference Result 73 states and 81 transitions. [2020-10-27 01:54:36,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-27 01:54:36,892 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 47 [2020-10-27 01:54:36,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:54:36,893 INFO L225 Difference]: With dead ends: 73 [2020-10-27 01:54:36,893 INFO L226 Difference]: Without dead ends: 70 [2020-10-27 01:54:36,894 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 668 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=298, Invalid=5402, Unknown=0, NotChecked=0, Total=5700 [2020-10-27 01:54:36,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-27 01:54:36,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 62. [2020-10-27 01:54:36,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-27 01:54:36,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 67 transitions. [2020-10-27 01:54:36,904 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 67 transitions. Word has length 47 [2020-10-27 01:54:36,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:54:36,905 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 67 transitions. [2020-10-27 01:54:36,905 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-27 01:54:36,905 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 67 transitions. [2020-10-27 01:54:36,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-27 01:54:36,905 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:54:36,905 INFO L422 BasicCegarLoop]: trace histogram [34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:54:36,906 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-27 01:54:36,906 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:54:36,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:54:36,906 INFO L82 PathProgramCache]: Analyzing trace with hash -1933924883, now seen corresponding path program 34 times [2020-10-27 01:54:36,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:54:36,906 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [171744081] [2020-10-27 01:54:36,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:54:36,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:54:36,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:54:38,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:54:39,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:54:40,477 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:54:40,477 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-27 01:54:40,477 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:54:40,477 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3551 [2020-10-27 01:54:40,478 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:54:40,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-27 01:54:40,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 01:54:40,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-27 01:54:40,478 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:54:41,839 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:54:41,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:54:41,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:54:41,846 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:54:41,846 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:54:41,846 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:54:41,847 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:54:41,847 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:54:41,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:54:41,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:54:41,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:54:41,847 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:54:41,852 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:54:41,852 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [171744081] [2020-10-27 01:54:41,853 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:54:41,853 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-27 01:54:41,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4418537] [2020-10-27 01:54:41,853 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-27 01:54:41,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:54:41,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-27 01:54:41,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1299, Unknown=0, NotChecked=0, Total=1406 [2020-10-27 01:54:41,854 INFO L87 Difference]: Start difference. First operand 62 states and 67 transitions. Second operand 38 states. [2020-10-27 01:54:45,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:54:45,941 INFO L93 Difference]: Finished difference Result 114 states and 125 transitions. [2020-10-27 01:54:45,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-27 01:54:45,942 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 48 [2020-10-27 01:54:45,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:54:45,943 INFO L225 Difference]: With dead ends: 114 [2020-10-27 01:54:45,943 INFO L226 Difference]: Without dead ends: 59 [2020-10-27 01:54:45,945 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 596 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=315, Invalid=4941, Unknown=0, NotChecked=0, Total=5256 [2020-10-27 01:54:45,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-27 01:54:45,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2020-10-27 01:54:45,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-27 01:54:45,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 62 transitions. [2020-10-27 01:54:45,954 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 62 transitions. Word has length 48 [2020-10-27 01:54:45,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:54:45,954 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 62 transitions. [2020-10-27 01:54:45,954 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-27 01:54:45,954 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 62 transitions. [2020-10-27 01:54:45,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-27 01:54:45,955 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:54:45,955 INFO L422 BasicCegarLoop]: trace histogram [35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:54:45,955 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-27 01:54:45,955 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:54:45,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:54:45,955 INFO L82 PathProgramCache]: Analyzing trace with hash 993235406, now seen corresponding path program 35 times [2020-10-27 01:54:45,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:54:45,956 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1153319906] [2020-10-27 01:54:45,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:54:45,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:54:45,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:54:46,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:54:47,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:54:50,807 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:54:50,807 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-27 01:54:50,807 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:54:50,808 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4838 [2020-10-27 01:54:50,808 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:54:50,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-27 01:54:50,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 01:54:50,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-27 01:54:50,808 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:54:52,242 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:54:52,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:54:52,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:54:52,246 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:54:52,247 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:54:52,247 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:54:52,247 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:54:52,247 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:54:52,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:54:52,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:54:52,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:54:52,247 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:54:52,253 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:54:52,253 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1153319906] [2020-10-27 01:54:52,253 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:54:52,253 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-27 01:54:52,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456067626] [2020-10-27 01:54:52,254 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-27 01:54:52,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:54:52,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-27 01:54:52,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1372, Unknown=0, NotChecked=0, Total=1482 [2020-10-27 01:54:52,254 INFO L87 Difference]: Start difference. First operand 58 states and 62 transitions. Second operand 39 states. [2020-10-27 01:54:56,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:54:56,522 INFO L93 Difference]: Finished difference Result 111 states and 120 transitions. [2020-10-27 01:54:56,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-27 01:54:56,523 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 49 [2020-10-27 01:54:56,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:54:56,524 INFO L225 Difference]: With dead ends: 111 [2020-10-27 01:54:56,524 INFO L226 Difference]: Without dead ends: 60 [2020-10-27 01:54:56,525 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 631 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=324, Invalid=5226, Unknown=0, NotChecked=0, Total=5550 [2020-10-27 01:54:56,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-27 01:54:56,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2020-10-27 01:54:56,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-27 01:54:56,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 63 transitions. [2020-10-27 01:54:56,535 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 63 transitions. Word has length 49 [2020-10-27 01:54:56,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:54:56,535 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 63 transitions. [2020-10-27 01:54:56,535 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-27 01:54:56,536 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 63 transitions. [2020-10-27 01:54:56,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-27 01:54:56,536 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:54:56,536 INFO L422 BasicCegarLoop]: trace histogram [36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:54:56,536 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-27 01:54:56,536 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:54:56,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:54:56,537 INFO L82 PathProgramCache]: Analyzing trace with hash 1540891149, now seen corresponding path program 36 times [2020-10-27 01:54:56,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:54:56,537 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2051785436] [2020-10-27 01:54:56,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:54:56,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:54:56,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:54:57,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:54:58,713 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:54:58,713 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-27 01:54:58,713 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:54:58,713 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2158 [2020-10-27 01:54:58,713 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:54:58,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-27 01:54:58,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 01:54:58,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-27 01:54:58,714 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:55:00,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:55:00,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:55:00,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:55:00,205 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:55:00,205 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:55:00,205 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:55:00,205 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:55:00,205 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:55:00,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:55:00,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:55:00,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:55:00,206 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:55:00,211 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:55:00,211 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2051785436] [2020-10-27 01:55:00,211 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:55:00,211 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-27 01:55:00,212 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854993102] [2020-10-27 01:55:00,212 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-27 01:55:00,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:55:00,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-27 01:55:00,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1447, Unknown=0, NotChecked=0, Total=1560 [2020-10-27 01:55:00,213 INFO L87 Difference]: Start difference. First operand 59 states and 63 transitions. Second operand 40 states. [2020-10-27 01:55:04,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:55:04,525 INFO L93 Difference]: Finished difference Result 113 states and 122 transitions. [2020-10-27 01:55:04,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-27 01:55:04,526 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 50 [2020-10-27 01:55:04,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:55:04,527 INFO L225 Difference]: With dead ends: 113 [2020-10-27 01:55:04,527 INFO L226 Difference]: Without dead ends: 61 [2020-10-27 01:55:04,528 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 667 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=333, Invalid=5519, Unknown=0, NotChecked=0, Total=5852 [2020-10-27 01:55:04,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-27 01:55:04,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 60. [2020-10-27 01:55:04,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-27 01:55:04,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 64 transitions. [2020-10-27 01:55:04,537 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 64 transitions. Word has length 50 [2020-10-27 01:55:04,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:55:04,537 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 64 transitions. [2020-10-27 01:55:04,538 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-27 01:55:04,538 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 64 transitions. [2020-10-27 01:55:04,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-27 01:55:04,538 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:55:04,538 INFO L422 BasicCegarLoop]: trace histogram [37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:55:04,538 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-27 01:55:04,538 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:55:04,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:55:04,539 INFO L82 PathProgramCache]: Analyzing trace with hash 1338349998, now seen corresponding path program 37 times [2020-10-27 01:55:04,539 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:55:04,539 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1218144891] [2020-10-27 01:55:04,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:55:04,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:55:04,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:55:04,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:55:05,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:55:09,556 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:55:09,557 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-27 01:55:09,557 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:55:09,557 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-27 01:55:09,557 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:55:09,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 41 [2020-10-27 01:55:09,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 01:55:09,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-27 01:55:09,557 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:55:11,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:55:11,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:55:11,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:55:11,308 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:55:11,308 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:55:11,309 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:55:11,309 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:55:11,309 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:55:11,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:55:11,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:55:11,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:55:11,309 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:55:11,315 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:55:11,315 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1218144891] [2020-10-27 01:55:11,315 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:55:11,315 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-10-27 01:55:11,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99356048] [2020-10-27 01:55:11,316 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-27 01:55:11,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:55:11,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-27 01:55:11,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=1723, Unknown=0, NotChecked=0, Total=1806 [2020-10-27 01:55:11,317 INFO L87 Difference]: Start difference. First operand 60 states and 64 transitions. Second operand 43 states. [2020-10-27 01:55:16,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:55:16,233 INFO L93 Difference]: Finished difference Result 115 states and 124 transitions. [2020-10-27 01:55:16,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-27 01:55:16,239 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 51 [2020-10-27 01:55:16,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:55:16,240 INFO L225 Difference]: With dead ends: 115 [2020-10-27 01:55:16,240 INFO L226 Difference]: Without dead ends: 62 [2020-10-27 01:55:16,241 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=235, Invalid=6245, Unknown=0, NotChecked=0, Total=6480 [2020-10-27 01:55:16,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-27 01:55:16,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2020-10-27 01:55:16,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-27 01:55:16,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 65 transitions. [2020-10-27 01:55:16,252 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 65 transitions. Word has length 51 [2020-10-27 01:55:16,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:55:16,252 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 65 transitions. [2020-10-27 01:55:16,252 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-27 01:55:16,252 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 65 transitions. [2020-10-27 01:55:16,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-27 01:55:16,253 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:55:16,253 INFO L422 BasicCegarLoop]: trace histogram [38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:55:16,253 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-27 01:55:16,253 INFO L429 AbstractCegarLoop]: === Iteration 42 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:55:16,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:55:16,253 INFO L82 PathProgramCache]: Analyzing trace with hash -645458387, now seen corresponding path program 38 times [2020-10-27 01:55:16,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:55:16,254 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [298285881] [2020-10-27 01:55:16,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:55:16,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:55:16,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:55:16,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:55:17,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:55:21,271 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:55:21,272 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-27 01:55:21,272 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:55:21,272 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-27 01:55:21,272 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:55:21,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-27 01:55:21,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 01:55:21,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-27 01:55:21,272 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:55:22,948 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:55:22,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:55:22,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:55:22,952 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:55:22,952 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:55:22,953 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:55:22,953 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:55:22,953 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:55:22,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:55:22,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:55:22,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:55:22,953 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:55:22,959 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:55:22,959 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [298285881] [2020-10-27 01:55:22,959 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:55:22,959 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-10-27 01:55:22,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106724823] [2020-10-27 01:55:22,960 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-27 01:55:22,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:55:22,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-27 01:55:22,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1603, Unknown=0, NotChecked=0, Total=1722 [2020-10-27 01:55:22,961 INFO L87 Difference]: Start difference. First operand 61 states and 65 transitions. Second operand 42 states. [2020-10-27 01:55:27,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:55:27,734 INFO L93 Difference]: Finished difference Result 117 states and 126 transitions. [2020-10-27 01:55:27,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-27 01:55:27,735 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 52 [2020-10-27 01:55:27,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:55:27,736 INFO L225 Difference]: With dead ends: 117 [2020-10-27 01:55:27,736 INFO L226 Difference]: Without dead ends: 63 [2020-10-27 01:55:27,738 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 742 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=351, Invalid=6129, Unknown=0, NotChecked=0, Total=6480 [2020-10-27 01:55:27,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-27 01:55:27,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2020-10-27 01:55:27,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-27 01:55:27,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 66 transitions. [2020-10-27 01:55:27,751 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 66 transitions. Word has length 52 [2020-10-27 01:55:27,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:55:27,751 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 66 transitions. [2020-10-27 01:55:27,751 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-27 01:55:27,751 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 66 transitions. [2020-10-27 01:55:27,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-27 01:55:27,751 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:55:27,752 INFO L422 BasicCegarLoop]: trace histogram [39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:55:27,752 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-27 01:55:27,752 INFO L429 AbstractCegarLoop]: === Iteration 43 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:55:27,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:55:27,752 INFO L82 PathProgramCache]: Analyzing trace with hash -2013976178, now seen corresponding path program 39 times [2020-10-27 01:55:27,752 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:55:27,753 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [650806415] [2020-10-27 01:55:27,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:55:27,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:55:27,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:55:27,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:55:30,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:55:32,792 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:55:32,792 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-27 01:55:32,792 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:55:32,792 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-27 01:55:32,792 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:55:32,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 41 [2020-10-27 01:55:32,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 01:55:32,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-27 01:55:32,793 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:55:34,548 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:55:34,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:55:34,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:55:34,554 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:55:34,554 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:55:34,554 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:55:34,554 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:55:34,554 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:55:34,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:55:34,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:55:34,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:55:34,554 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:55:34,562 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:55:34,563 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [650806415] [2020-10-27 01:55:34,563 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:55:34,563 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-10-27 01:55:34,563 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633299076] [2020-10-27 01:55:34,563 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-27 01:55:34,563 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:55:34,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-27 01:55:34,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1684, Unknown=0, NotChecked=0, Total=1806 [2020-10-27 01:55:34,564 INFO L87 Difference]: Start difference. First operand 62 states and 66 transitions. Second operand 43 states. [2020-10-27 01:55:39,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:55:39,604 INFO L93 Difference]: Finished difference Result 119 states and 128 transitions. [2020-10-27 01:55:39,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-27 01:55:39,605 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 53 [2020-10-27 01:55:39,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:55:39,606 INFO L225 Difference]: With dead ends: 119 [2020-10-27 01:55:39,606 INFO L226 Difference]: Without dead ends: 64 [2020-10-27 01:55:39,608 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 781 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=360, Invalid=6446, Unknown=0, NotChecked=0, Total=6806 [2020-10-27 01:55:39,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-27 01:55:39,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2020-10-27 01:55:39,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-27 01:55:39,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 67 transitions. [2020-10-27 01:55:39,619 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 67 transitions. Word has length 53 [2020-10-27 01:55:39,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:55:39,619 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 67 transitions. [2020-10-27 01:55:39,619 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-27 01:55:39,619 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 67 transitions. [2020-10-27 01:55:39,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-27 01:55:39,620 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:55:39,620 INFO L422 BasicCegarLoop]: trace histogram [40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:55:39,620 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-27 01:55:39,620 INFO L429 AbstractCegarLoop]: === Iteration 44 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:55:39,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:55:39,621 INFO L82 PathProgramCache]: Analyzing trace with hash -1488354739, now seen corresponding path program 40 times [2020-10-27 01:55:39,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:55:39,621 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1502460111] [2020-10-27 01:55:39,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:55:39,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:55:39,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:55:40,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:55:43,252 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:55:43,253 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-27 01:55:43,253 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:55:43,253 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3611 [2020-10-27 01:55:43,253 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:55:43,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 42 [2020-10-27 01:55:43,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 01:55:43,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-27 01:55:43,253 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:55:45,064 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:55:45,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:55:45,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:55:45,068 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:55:45,068 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:55:45,069 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:55:45,069 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:55:45,069 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:55:45,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:55:45,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:55:45,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:55:45,069 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:55:45,075 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:55:45,075 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1502460111] [2020-10-27 01:55:45,075 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:55:45,075 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-10-27 01:55:45,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721166876] [2020-10-27 01:55:45,076 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-10-27 01:55:45,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:55:45,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-10-27 01:55:45,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=1767, Unknown=0, NotChecked=0, Total=1892 [2020-10-27 01:55:45,077 INFO L87 Difference]: Start difference. First operand 63 states and 67 transitions. Second operand 44 states. [2020-10-27 01:55:50,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:55:50,369 INFO L93 Difference]: Finished difference Result 121 states and 130 transitions. [2020-10-27 01:55:50,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-27 01:55:50,370 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 54 [2020-10-27 01:55:50,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:55:50,371 INFO L225 Difference]: With dead ends: 121 [2020-10-27 01:55:50,372 INFO L226 Difference]: Without dead ends: 65 [2020-10-27 01:55:50,373 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 821 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=369, Invalid=6771, Unknown=0, NotChecked=0, Total=7140 [2020-10-27 01:55:50,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-27 01:55:50,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 64. [2020-10-27 01:55:50,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-27 01:55:50,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 68 transitions. [2020-10-27 01:55:50,385 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 68 transitions. Word has length 54 [2020-10-27 01:55:50,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:55:50,385 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 68 transitions. [2020-10-27 01:55:50,385 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-10-27 01:55:50,385 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 68 transitions. [2020-10-27 01:55:50,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-27 01:55:50,385 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:55:50,385 INFO L422 BasicCegarLoop]: trace histogram [41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:55:50,386 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-27 01:55:50,386 INFO L429 AbstractCegarLoop]: === Iteration 45 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:55:50,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:55:50,386 INFO L82 PathProgramCache]: Analyzing trace with hash 1921007982, now seen corresponding path program 41 times [2020-10-27 01:55:50,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:55:50,386 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1349311345] [2020-10-27 01:55:50,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:55:50,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:55:50,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:55:50,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:55:52,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:55:55,448 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:55:55,449 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-27 01:55:55,449 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:55:55,449 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5039 [2020-10-27 01:55:55,449 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:55:55,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 45 [2020-10-27 01:55:55,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 01:55:55,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-27 01:55:55,449 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:55:57,501 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:55:57,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:55:57,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:55:57,506 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:55:57,506 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:55:57,506 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:55:57,506 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:55:57,507 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:55:57,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:55:57,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:55:57,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:55:57,507 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:55:57,513 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:55:57,513 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1349311345] [2020-10-27 01:55:57,513 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:55:57,513 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2020-10-27 01:55:57,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783040544] [2020-10-27 01:55:57,514 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-10-27 01:55:57,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:55:57,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-10-27 01:55:57,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=2071, Unknown=0, NotChecked=0, Total=2162 [2020-10-27 01:55:57,514 INFO L87 Difference]: Start difference. First operand 64 states and 68 transitions. Second operand 47 states. [2020-10-27 01:56:03,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:56:03,279 INFO L93 Difference]: Finished difference Result 123 states and 132 transitions. [2020-10-27 01:56:03,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-27 01:56:03,280 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 55 [2020-10-27 01:56:03,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:56:03,281 INFO L225 Difference]: With dead ends: 123 [2020-10-27 01:56:03,281 INFO L226 Difference]: Without dead ends: 66 [2020-10-27 01:56:03,282 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 861 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=259, Invalid=7573, Unknown=0, NotChecked=0, Total=7832 [2020-10-27 01:56:03,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-27 01:56:03,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2020-10-27 01:56:03,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-27 01:56:03,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 69 transitions. [2020-10-27 01:56:03,294 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 69 transitions. Word has length 55 [2020-10-27 01:56:03,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:56:03,294 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 69 transitions. [2020-10-27 01:56:03,295 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-10-27 01:56:03,295 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 69 transitions. [2020-10-27 01:56:03,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-27 01:56:03,295 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:56:03,295 INFO L422 BasicCegarLoop]: trace histogram [42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:56:03,295 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-27 01:56:03,296 INFO L429 AbstractCegarLoop]: === Iteration 46 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:56:03,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:56:03,296 INFO L82 PathProgramCache]: Analyzing trace with hash 237069933, now seen corresponding path program 42 times [2020-10-27 01:56:03,296 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:56:03,296 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [748540797] [2020-10-27 01:56:03,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:56:03,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:56:03,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:03,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:04,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:08,314 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:56:08,314 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-27 01:56:08,315 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:56:08,315 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-27 01:56:08,315 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:56:08,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 44 [2020-10-27 01:56:08,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 01:56:08,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-27 01:56:08,315 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:56:10,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:56:10,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:56:10,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:10,238 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:56:10,238 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:56:10,238 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:56:10,238 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:56:10,238 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:56:10,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:56:10,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:56:10,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:56:10,239 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:56:10,245 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:56:10,245 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [748540797] [2020-10-27 01:56:10,245 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:56:10,245 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-10-27 01:56:10,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092937475] [2020-10-27 01:56:10,246 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-10-27 01:56:10,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:56:10,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-10-27 01:56:10,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=1939, Unknown=0, NotChecked=0, Total=2070 [2020-10-27 01:56:10,248 INFO L87 Difference]: Start difference. First operand 65 states and 69 transitions. Second operand 46 states. [2020-10-27 01:56:15,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:56:15,572 INFO L93 Difference]: Finished difference Result 125 states and 134 transitions. [2020-10-27 01:56:15,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-27 01:56:15,572 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 56 [2020-10-27 01:56:15,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:56:15,574 INFO L225 Difference]: With dead ends: 125 [2020-10-27 01:56:15,574 INFO L226 Difference]: Without dead ends: 67 [2020-10-27 01:56:15,576 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 904 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=387, Invalid=7445, Unknown=0, NotChecked=0, Total=7832 [2020-10-27 01:56:15,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-27 01:56:15,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 66. [2020-10-27 01:56:15,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-27 01:56:15,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 70 transitions. [2020-10-27 01:56:15,589 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 70 transitions. Word has length 56 [2020-10-27 01:56:15,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:56:15,589 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 70 transitions. [2020-10-27 01:56:15,589 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-10-27 01:56:15,589 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 70 transitions. [2020-10-27 01:56:15,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-27 01:56:15,590 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:56:15,590 INFO L422 BasicCegarLoop]: trace histogram [43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:56:15,590 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-27 01:56:15,590 INFO L429 AbstractCegarLoop]: === Iteration 47 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:56:15,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:56:15,590 INFO L82 PathProgramCache]: Analyzing trace with hash -425402034, now seen corresponding path program 43 times [2020-10-27 01:56:15,591 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:56:15,591 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [23134859] [2020-10-27 01:56:15,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:56:15,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:56:15,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:15,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking...