/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=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.3 --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/locks/test_locks_12.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-29 09:32:42,340 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-29 09:32:42,345 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-29 09:32:42,398 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-29 09:32:42,399 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-29 09:32:42,400 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-29 09:32:42,402 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-29 09:32:42,404 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-29 09:32:42,407 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-29 09:32:42,408 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-29 09:32:42,409 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-29 09:32:42,411 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-29 09:32:42,411 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-29 09:32:42,412 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-29 09:32:42,414 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-29 09:32:42,415 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-29 09:32:42,416 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-29 09:32:42,417 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-29 09:32:42,419 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-29 09:32:42,421 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-29 09:32:42,423 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-29 09:32:42,425 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-29 09:32:42,426 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-29 09:32:42,427 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-29 09:32:42,442 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-29 09:32:42,442 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-29 09:32:42,443 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-29 09:32:42,448 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-29 09:32:42,449 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-29 09:32:42,450 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-29 09:32:42,450 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-29 09:32:42,451 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-29 09:32:42,452 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-29 09:32:42,453 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-29 09:32:42,455 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-29 09:32:42,455 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-29 09:32:42,456 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-29 09:32:42,456 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-29 09:32:42,457 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-29 09:32:42,458 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-29 09:32:42,459 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-29 09:32:42,460 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 [2020-10-29 09:32:42,487 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-29 09:32:42,487 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-29 09:32:42,489 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-29 09:32:42,489 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-29 09:32:42,489 INFO L138 SettingsManager]: * Use SBE=true [2020-10-29 09:32:42,490 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-29 09:32:42,490 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-29 09:32:42,490 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-29 09:32:42,490 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-29 09:32:42,490 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-29 09:32:42,491 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-29 09:32:42,491 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-29 09:32:42,491 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-29 09:32:42,491 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-29 09:32:42,491 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-29 09:32:42,492 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-29 09:32:42,492 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-29 09:32:42,492 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-29 09:32:42,492 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-29 09:32:42,492 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-29 09:32:42,493 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-29 09:32:42,493 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 09:32:42,493 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-29 09:32:42,493 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-29 09:32:42,494 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-29 09:32:42,494 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-29 09:32:42,494 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-29 09:32:42,494 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-29 09:32:42,494 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-29 09:32:42,495 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true;unknown-allowed=true; [2020-10-29 09:32:42,866 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-29 09:32:42,898 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-29 09:32:42,902 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-29 09:32:42,903 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-29 09:32:42,904 INFO L275 PluginConnector]: CDTParser initialized [2020-10-29 09:32:42,905 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_12.c [2020-10-29 09:32:42,998 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9191828fe/14ad41187728421c9ffa92f6180f434d/FLAGe82413c7c [2020-10-29 09:32:43,650 INFO L306 CDTParser]: Found 1 translation units. [2020-10-29 09:32:43,650 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/locks/test_locks_12.c [2020-10-29 09:32:43,659 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9191828fe/14ad41187728421c9ffa92f6180f434d/FLAGe82413c7c [2020-10-29 09:32:44,030 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9191828fe/14ad41187728421c9ffa92f6180f434d [2020-10-29 09:32:44,033 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-29 09:32:44,040 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-29 09:32:44,042 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-29 09:32:44,042 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-29 09:32:44,046 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-29 09:32:44,047 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 09:32:44" (1/1) ... [2020-10-29 09:32:44,051 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@181a7bee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:32:44, skipping insertion in model container [2020-10-29 09:32:44,051 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 09:32:44" (1/1) ... [2020-10-29 09:32:44,059 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-29 09:32:44,081 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-29 09:32:44,257 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 09:32:44,268 INFO L203 MainTranslator]: Completed pre-run [2020-10-29 09:32:44,303 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 09:32:44,320 INFO L208 MainTranslator]: Completed translation [2020-10-29 09:32:44,321 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:32:44 WrapperNode [2020-10-29 09:32:44,321 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-29 09:32:44,322 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-29 09:32:44,322 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-29 09:32:44,323 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-29 09:32:44,337 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:32:44" (1/1) ... [2020-10-29 09:32:44,337 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:32:44" (1/1) ... [2020-10-29 09:32:44,346 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:32:44" (1/1) ... [2020-10-29 09:32:44,346 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:32:44" (1/1) ... [2020-10-29 09:32:44,355 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:32:44" (1/1) ... [2020-10-29 09:32:44,362 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:32:44" (1/1) ... [2020-10-29 09:32:44,364 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:32:44" (1/1) ... [2020-10-29 09:32:44,367 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-29 09:32:44,369 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-29 09:32:44,369 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-29 09:32:44,369 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-29 09:32:44,370 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:32:44" (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 [2020-10-29 09:32:44,463 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-29 09:32:44,464 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-29 09:32:44,464 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-29 09:32:44,464 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-29 09:32:44,464 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-29 09:32:44,464 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-29 09:32:44,465 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-29 09:32:44,465 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-29 09:32:44,465 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-29 09:32:44,465 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-29 09:32:44,465 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-29 09:32:44,466 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-29 09:32:44,466 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-29 09:32:44,466 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-29 09:32:44,466 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-29 09:32:44,466 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-29 09:32:45,143 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-29 09:32:45,144 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-29 09:32:45,146 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 09:32:45 BoogieIcfgContainer [2020-10-29 09:32:45,147 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-29 09:32:45,150 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-29 09:32:45,150 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-29 09:32:45,154 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-29 09:32:45,154 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 09:32:44" (1/3) ... [2020-10-29 09:32:45,156 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@563ee497 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 09:32:45, skipping insertion in model container [2020-10-29 09:32:45,156 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:32:44" (2/3) ... [2020-10-29 09:32:45,156 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@563ee497 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 09:32:45, skipping insertion in model container [2020-10-29 09:32:45,157 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 09:32:45" (3/3) ... [2020-10-29 09:32:45,158 INFO L111 eAbstractionObserver]: Analyzing ICFG test_locks_12.c [2020-10-29 09:32:45,169 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-29 09:32:45,173 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-29 09:32:45,185 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-29 09:32:45,211 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-29 09:32:45,211 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-29 09:32:45,211 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-29 09:32:45,212 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-29 09:32:45,212 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-29 09:32:45,212 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-29 09:32:45,212 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-29 09:32:45,212 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-29 09:32:45,230 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states. [2020-10-29 09:32:45,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-29 09:32:45,237 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:32:45,238 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:32:45,238 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:32:45,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:32:45,245 INFO L82 PathProgramCache]: Analyzing trace with hash 384689759, now seen corresponding path program 1 times [2020-10-29 09:32:45,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:32:45,255 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1350293] [2020-10-29 09:32:45,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:32:45,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:32:45,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:32:45,710 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:32:45,710 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-29 09:32:45,710 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:32:45,710 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 291 [2020-10-29 09:32:45,713 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:32:45,713 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:32:45,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:32:45,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-29 09:32:45,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-29 09:32:45,714 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-29 09:32:45,809 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:32:45,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:32:45,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:32:45,833 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:32:45,833 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:32:45,834 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:32:45,834 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-29 09:32:45,837 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:32:45,837 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:32:45,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:32:45,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:32:45,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:32:45,838 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:32:45,860 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:32:45,861 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1350293] [2020-10-29 09:32:45,863 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:32:45,864 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 09:32:45,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741375831] [2020-10-29 09:32:45,875 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 09:32:45,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:32:45,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 09:32:45,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 09:32:45,901 INFO L87 Difference]: Start difference. First operand 55 states. Second operand 4 states. [2020-10-29 09:32:46,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:32:46,258 INFO L93 Difference]: Finished difference Result 104 states and 181 transitions. [2020-10-29 09:32:46,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-29 09:32:46,260 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 24 [2020-10-29 09:32:46,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:32:46,274 INFO L225 Difference]: With dead ends: 104 [2020-10-29 09:32:46,274 INFO L226 Difference]: Without dead ends: 85 [2020-10-29 09:32:46,278 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 [2020-10-29 09:32:46,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-29 09:32:46,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 60. [2020-10-29 09:32:46,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-29 09:32:46,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 107 transitions. [2020-10-29 09:32:46,338 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 107 transitions. Word has length 24 [2020-10-29 09:32:46,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:32:46,339 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 107 transitions. [2020-10-29 09:32:46,339 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 09:32:46,339 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 107 transitions. [2020-10-29 09:32:46,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-29 09:32:46,340 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:32:46,341 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:32:46,341 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-29 09:32:46,341 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:32:46,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:32:46,342 INFO L82 PathProgramCache]: Analyzing trace with hash -636378595, now seen corresponding path program 1 times [2020-10-29 09:32:46,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:32:46,343 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1639706428] [2020-10-29 09:32:46,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:32:46,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:32:46,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:32:46,493 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:32:46,493 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-29 09:32:46,493 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:32:46,493 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 118 [2020-10-29 09:32:46,493 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:32:46,494 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:32:46,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:32:46,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-29 09:32:46,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-29 09:32:46,494 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:32:46,545 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:32:46,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:32:46,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:32:46,560 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:32:46,560 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:32:46,560 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:32:46,560 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-29 09:32:46,561 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:32:46,561 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:32:46,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:32:46,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:32:46,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:32:46,562 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:32:46,568 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:32:46,568 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1639706428] [2020-10-29 09:32:46,569 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:32:46,569 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 09:32:46,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688936312] [2020-10-29 09:32:46,570 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 09:32:46,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:32:46,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 09:32:46,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 09:32:46,572 INFO L87 Difference]: Start difference. First operand 60 states and 107 transitions. Second operand 4 states. [2020-10-29 09:32:46,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:32:46,782 INFO L93 Difference]: Finished difference Result 139 states and 255 transitions. [2020-10-29 09:32:46,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-29 09:32:46,783 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 24 [2020-10-29 09:32:46,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:32:46,785 INFO L225 Difference]: With dead ends: 139 [2020-10-29 09:32:46,785 INFO L226 Difference]: Without dead ends: 85 [2020-10-29 09:32:46,787 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 [2020-10-29 09:32:46,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-29 09:32:46,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 84. [2020-10-29 09:32:46,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-29 09:32:46,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 151 transitions. [2020-10-29 09:32:46,802 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 151 transitions. Word has length 24 [2020-10-29 09:32:46,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:32:46,803 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 151 transitions. [2020-10-29 09:32:46,803 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 09:32:46,803 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 151 transitions. [2020-10-29 09:32:46,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-29 09:32:46,804 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:32:46,805 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:32:46,805 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-29 09:32:46,806 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:32:46,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:32:46,806 INFO L82 PathProgramCache]: Analyzing trace with hash -952931053, now seen corresponding path program 1 times [2020-10-29 09:32:46,806 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:32:46,807 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1007856495] [2020-10-29 09:32:46,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:32:46,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:32:46,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:32:46,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:32:47,066 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:32:47,066 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-29 09:32:47,067 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:32:47,067 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 227 [2020-10-29 09:32:47,069 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:32:47,069 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:32:47,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:32:47,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-29 09:32:47,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-29 09:32:47,070 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-29 09:32:47,130 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:32:47,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:32:47,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:32:47,157 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:32:47,158 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:32:47,158 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:32:47,158 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-29 09:32:47,159 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:32:47,159 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:32:47,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:32:47,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:32:47,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:32:47,160 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:32:47,166 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:32:47,166 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1007856495] [2020-10-29 09:32:47,167 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:32:47,167 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 09:32:47,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342950905] [2020-10-29 09:32:47,167 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 09:32:47,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:32:47,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 09:32:47,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 09:32:47,169 INFO L87 Difference]: Start difference. First operand 84 states and 151 transitions. Second operand 4 states. [2020-10-29 09:32:47,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:32:47,417 INFO L93 Difference]: Finished difference Result 236 states and 436 transitions. [2020-10-29 09:32:47,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-29 09:32:47,418 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2020-10-29 09:32:47,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:32:47,420 INFO L225 Difference]: With dead ends: 236 [2020-10-29 09:32:47,421 INFO L226 Difference]: Without dead ends: 158 [2020-10-29 09:32:47,422 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 [2020-10-29 09:32:47,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2020-10-29 09:32:47,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 157. [2020-10-29 09:32:47,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-10-29 09:32:47,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 286 transitions. [2020-10-29 09:32:47,442 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 286 transitions. Word has length 25 [2020-10-29 09:32:47,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:32:47,442 INFO L481 AbstractCegarLoop]: Abstraction has 157 states and 286 transitions. [2020-10-29 09:32:47,443 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 09:32:47,443 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 286 transitions. [2020-10-29 09:32:47,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-29 09:32:47,444 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:32:47,445 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:32:47,445 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-29 09:32:47,445 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:32:47,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:32:47,446 INFO L82 PathProgramCache]: Analyzing trace with hash 68137301, now seen corresponding path program 1 times [2020-10-29 09:32:47,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:32:47,446 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1414792856] [2020-10-29 09:32:47,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:32:47,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:32:47,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:32:47,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:32:47,634 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:32:47,634 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-29 09:32:47,635 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:32:47,635 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 171 [2020-10-29 09:32:47,635 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:32:47,635 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:32:47,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:32:47,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-29 09:32:47,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-29 09:32:47,636 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:32:47,676 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:32:47,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:32:47,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:32:47,684 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:32:47,684 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:32:47,685 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:32:47,685 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 09:32:47,685 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:32:47,685 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:32:47,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:32:47,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:32:47,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:32:47,686 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:32:47,690 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:32:47,691 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1414792856] [2020-10-29 09:32:47,691 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:32:47,691 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 09:32:47,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458395161] [2020-10-29 09:32:47,692 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 09:32:47,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:32:47,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 09:32:47,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 09:32:47,694 INFO L87 Difference]: Start difference. First operand 157 states and 286 transitions. Second operand 4 states. [2020-10-29 09:32:47,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:32:47,870 INFO L93 Difference]: Finished difference Result 205 states and 373 transitions. [2020-10-29 09:32:47,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-29 09:32:47,870 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2020-10-29 09:32:47,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:32:47,873 INFO L225 Difference]: With dead ends: 205 [2020-10-29 09:32:47,873 INFO L226 Difference]: Without dead ends: 202 [2020-10-29 09:32:47,874 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 [2020-10-29 09:32:47,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-10-29 09:32:47,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 157. [2020-10-29 09:32:47,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-10-29 09:32:47,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 284 transitions. [2020-10-29 09:32:47,891 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 284 transitions. Word has length 25 [2020-10-29 09:32:47,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:32:47,891 INFO L481 AbstractCegarLoop]: Abstraction has 157 states and 284 transitions. [2020-10-29 09:32:47,891 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 09:32:47,891 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 284 transitions. [2020-10-29 09:32:47,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-29 09:32:47,896 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:32:47,896 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:32:47,897 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-29 09:32:47,897 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:32:47,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:32:47,897 INFO L82 PathProgramCache]: Analyzing trace with hash 530507306, now seen corresponding path program 1 times [2020-10-29 09:32:47,898 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:32:47,898 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [78067382] [2020-10-29 09:32:47,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:32:47,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:32:47,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:32:47,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:32:48,083 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:32:48,083 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-29 09:32:48,084 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:32:48,084 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 165 [2020-10-29 09:32:48,084 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:32:48,084 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:32:48,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:32:48,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-29 09:32:48,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-29 09:32:48,085 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:32:48,182 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:32:48,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:32:48,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:32:48,197 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:32:48,198 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:32:48,198 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:32:48,198 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-29 09:32:48,198 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:32:48,199 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:32:48,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:32:48,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:32:48,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:32:48,199 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:32:48,205 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:32:48,206 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [78067382] [2020-10-29 09:32:48,206 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:32:48,206 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 09:32:48,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492448198] [2020-10-29 09:32:48,208 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 09:32:48,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:32:48,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 09:32:48,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 09:32:48,209 INFO L87 Difference]: Start difference. First operand 157 states and 284 transitions. Second operand 4 states. [2020-10-29 09:32:48,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:32:48,414 INFO L93 Difference]: Finished difference Result 297 states and 543 transitions. [2020-10-29 09:32:48,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-29 09:32:48,417 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 26 [2020-10-29 09:32:48,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:32:48,419 INFO L225 Difference]: With dead ends: 297 [2020-10-29 09:32:48,419 INFO L226 Difference]: Without dead ends: 294 [2020-10-29 09:32:48,420 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 [2020-10-29 09:32:48,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2020-10-29 09:32:48,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 213. [2020-10-29 09:32:48,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 213 states. [2020-10-29 09:32:48,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 384 transitions. [2020-10-29 09:32:48,438 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 384 transitions. Word has length 26 [2020-10-29 09:32:48,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:32:48,438 INFO L481 AbstractCegarLoop]: Abstraction has 213 states and 384 transitions. [2020-10-29 09:32:48,439 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 09:32:48,439 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 384 transitions. [2020-10-29 09:32:48,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-29 09:32:48,440 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:32:48,440 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:32:48,441 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-29 09:32:48,441 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:32:48,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:32:48,441 INFO L82 PathProgramCache]: Analyzing trace with hash -490561048, now seen corresponding path program 1 times [2020-10-29 09:32:48,442 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:32:48,442 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [929737077] [2020-10-29 09:32:48,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:32:48,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:32:48,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:32:48,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:32:48,569 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:32:48,570 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-29 09:32:48,570 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:32:48,570 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 116 [2020-10-29 09:32:48,570 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:32:48,570 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:32:48,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:32:48,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-29 09:32:48,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-29 09:32:48,571 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:32:48,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:32:48,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:32:48,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:32:48,626 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:32:48,626 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:32:48,626 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:32:48,626 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 09:32:48,627 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:32:48,627 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:32:48,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:32:48,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:32:48,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:32:48,627 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:32:48,633 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:32:48,633 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [929737077] [2020-10-29 09:32:48,634 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:32:48,634 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 09:32:48,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22399352] [2020-10-29 09:32:48,634 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 09:32:48,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:32:48,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 09:32:48,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 09:32:48,636 INFO L87 Difference]: Start difference. First operand 213 states and 384 transitions. Second operand 4 states. [2020-10-29 09:32:48,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:32:48,857 INFO L93 Difference]: Finished difference Result 509 states and 927 transitions. [2020-10-29 09:32:48,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-29 09:32:48,857 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 26 [2020-10-29 09:32:48,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:32:48,859 INFO L225 Difference]: With dead ends: 509 [2020-10-29 09:32:48,859 INFO L226 Difference]: Without dead ends: 302 [2020-10-29 09:32:48,861 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 [2020-10-29 09:32:48,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2020-10-29 09:32:48,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 301. [2020-10-29 09:32:48,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 301 states. [2020-10-29 09:32:48,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 540 transitions. [2020-10-29 09:32:48,879 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 540 transitions. Word has length 26 [2020-10-29 09:32:48,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:32:48,879 INFO L481 AbstractCegarLoop]: Abstraction has 301 states and 540 transitions. [2020-10-29 09:32:48,880 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 09:32:48,880 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 540 transitions. [2020-10-29 09:32:48,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-29 09:32:48,881 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:32:48,881 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:32:48,881 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-29 09:32:48,882 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:32:48,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:32:48,882 INFO L82 PathProgramCache]: Analyzing trace with hash -727533250, now seen corresponding path program 1 times [2020-10-29 09:32:48,882 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:32:48,883 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [359096059] [2020-10-29 09:32:48,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:32:48,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:32:48,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:32:48,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:32:48,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:32:49,098 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:32:49,099 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-29 09:32:49,099 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:32:49,099 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 204 [2020-10-29 09:32:49,099 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:32:49,099 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:32:49,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:32:49,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-29 09:32:49,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-29 09:32:49,100 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:32:49,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:32:49,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:32:49,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:32:49,155 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:32:49,156 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:32:49,156 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:32:49,156 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 09:32:49,156 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:32:49,156 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:32:49,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:32:49,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:32:49,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:32:49,157 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:32:49,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:32:49,162 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [359096059] [2020-10-29 09:32:49,162 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:32:49,162 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 09:32:49,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735145532] [2020-10-29 09:32:49,163 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 09:32:49,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:32:49,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 09:32:49,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 09:32:49,165 INFO L87 Difference]: Start difference. First operand 301 states and 540 transitions. Second operand 4 states. [2020-10-29 09:32:49,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:32:49,391 INFO L93 Difference]: Finished difference Result 458 states and 819 transitions. [2020-10-29 09:32:49,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-29 09:32:49,392 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2020-10-29 09:32:49,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:32:49,395 INFO L225 Difference]: With dead ends: 458 [2020-10-29 09:32:49,395 INFO L226 Difference]: Without dead ends: 311 [2020-10-29 09:32:49,402 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 [2020-10-29 09:32:49,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2020-10-29 09:32:49,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 310. [2020-10-29 09:32:49,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 310 states. [2020-10-29 09:32:49,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 548 transitions. [2020-10-29 09:32:49,438 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 548 transitions. Word has length 27 [2020-10-29 09:32:49,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:32:49,438 INFO L481 AbstractCegarLoop]: Abstraction has 310 states and 548 transitions. [2020-10-29 09:32:49,438 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 09:32:49,438 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 548 transitions. [2020-10-29 09:32:49,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-29 09:32:49,442 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:32:49,445 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:32:49,445 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-29 09:32:49,445 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:32:49,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:32:49,446 INFO L82 PathProgramCache]: Analyzing trace with hash 1979086144, now seen corresponding path program 1 times [2020-10-29 09:32:49,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:32:49,446 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [983337519] [2020-10-29 09:32:49,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:32:49,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:32:49,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:32:49,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:32:49,587 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:32:49,587 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-29 09:32:49,587 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:32:49,587 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 118 [2020-10-29 09:32:49,587 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:32:49,588 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:32:49,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:32:49,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-29 09:32:49,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-29 09:32:49,588 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:32:49,635 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:32:49,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:32:49,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:32:49,644 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:32:49,644 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:32:49,644 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:32:49,644 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 09:32:49,644 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:32:49,645 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:32:49,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:32:49,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:32:49,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:32:49,645 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:32:49,650 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:32:49,650 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [983337519] [2020-10-29 09:32:49,650 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:32:49,651 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 09:32:49,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410471453] [2020-10-29 09:32:49,651 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 09:32:49,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:32:49,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 09:32:49,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 09:32:49,654 INFO L87 Difference]: Start difference. First operand 310 states and 548 transitions. Second operand 4 states. [2020-10-29 09:32:49,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:32:49,845 INFO L93 Difference]: Finished difference Result 574 states and 1027 transitions. [2020-10-29 09:32:49,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-29 09:32:49,848 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2020-10-29 09:32:49,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:32:49,851 INFO L225 Difference]: With dead ends: 574 [2020-10-29 09:32:49,851 INFO L226 Difference]: Without dead ends: 571 [2020-10-29 09:32:49,852 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 [2020-10-29 09:32:49,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2020-10-29 09:32:49,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 426. [2020-10-29 09:32:49,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 426 states. [2020-10-29 09:32:49,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426 states to 426 states and 744 transitions. [2020-10-29 09:32:49,876 INFO L78 Accepts]: Start accepts. Automaton has 426 states and 744 transitions. Word has length 27 [2020-10-29 09:32:49,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:32:49,876 INFO L481 AbstractCegarLoop]: Abstraction has 426 states and 744 transitions. [2020-10-29 09:32:49,876 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 09:32:49,876 INFO L276 IsEmpty]: Start isEmpty. Operand 426 states and 744 transitions. [2020-10-29 09:32:49,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-29 09:32:49,878 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:32:49,878 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:32:49,878 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-29 09:32:49,878 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:32:49,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:32:49,879 INFO L82 PathProgramCache]: Analyzing trace with hash 958017790, now seen corresponding path program 1 times [2020-10-29 09:32:49,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:32:49,879 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [396073807] [2020-10-29 09:32:49,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:32:49,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:32:49,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:32:49,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:32:50,028 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:32:50,028 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-29 09:32:50,028 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:32:50,028 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 125 [2020-10-29 09:32:50,029 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:32:50,029 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:32:50,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:32:50,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-29 09:32:50,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-29 09:32:50,030 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:32:50,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:32:50,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:32:50,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:32:50,084 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:32:50,084 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:32:50,084 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:32:50,084 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-29 09:32:50,084 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:32:50,085 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:32:50,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:32:50,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:32:50,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:32:50,085 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:32:50,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:32:50,106 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [396073807] [2020-10-29 09:32:50,106 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:32:50,107 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 09:32:50,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010192143] [2020-10-29 09:32:50,109 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 09:32:50,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:32:50,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 09:32:50,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 09:32:50,116 INFO L87 Difference]: Start difference. First operand 426 states and 744 transitions. Second operand 4 states. [2020-10-29 09:32:50,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:32:50,336 INFO L93 Difference]: Finished difference Result 1006 states and 1771 transitions. [2020-10-29 09:32:50,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-29 09:32:50,337 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2020-10-29 09:32:50,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:32:50,341 INFO L225 Difference]: With dead ends: 1006 [2020-10-29 09:32:50,342 INFO L226 Difference]: Without dead ends: 595 [2020-10-29 09:32:50,346 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 [2020-10-29 09:32:50,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 595 states. [2020-10-29 09:32:50,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 595 to 594. [2020-10-29 09:32:50,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 594 states. [2020-10-29 09:32:50,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 594 states to 594 states and 1032 transitions. [2020-10-29 09:32:50,374 INFO L78 Accepts]: Start accepts. Automaton has 594 states and 1032 transitions. Word has length 27 [2020-10-29 09:32:50,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:32:50,376 INFO L481 AbstractCegarLoop]: Abstraction has 594 states and 1032 transitions. [2020-10-29 09:32:50,376 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 09:32:50,376 INFO L276 IsEmpty]: Start isEmpty. Operand 594 states and 1032 transitions. [2020-10-29 09:32:50,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-29 09:32:50,380 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:32:50,381 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:32:50,381 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-29 09:32:50,381 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:32:50,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:32:50,381 INFO L82 PathProgramCache]: Analyzing trace with hash 1228748339, now seen corresponding path program 1 times [2020-10-29 09:32:50,382 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:32:50,382 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2101484793] [2020-10-29 09:32:50,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:32:50,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:32:50,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:32:50,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:32:50,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:32:50,608 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:32:50,608 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-29 09:32:50,608 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:32:50,608 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 205 [2020-10-29 09:32:50,609 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:32:50,609 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:32:50,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:32:50,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-29 09:32:50,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-29 09:32:50,609 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:32:50,653 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:32:50,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:32:50,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:32:50,661 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:32:50,662 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:32:50,662 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:32:50,662 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:32:50,662 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:32:50,662 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:32:50,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:32:50,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:32:50,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:32:50,663 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:32:50,667 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:32:50,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2101484793] [2020-10-29 09:32:50,669 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:32:50,669 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 09:32:50,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813287835] [2020-10-29 09:32:50,670 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 09:32:50,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:32:50,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 09:32:50,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 09:32:50,671 INFO L87 Difference]: Start difference. First operand 594 states and 1032 transitions. Second operand 4 states. [2020-10-29 09:32:50,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:32:50,898 INFO L93 Difference]: Finished difference Result 1094 states and 1923 transitions. [2020-10-29 09:32:50,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-29 09:32:50,899 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 28 [2020-10-29 09:32:50,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:32:50,905 INFO L225 Difference]: With dead ends: 1094 [2020-10-29 09:32:50,906 INFO L226 Difference]: Without dead ends: 1091 [2020-10-29 09:32:50,907 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 [2020-10-29 09:32:50,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1091 states. [2020-10-29 09:32:50,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1091 to 834. [2020-10-29 09:32:50,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 834 states. [2020-10-29 09:32:50,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 834 states to 834 states and 1424 transitions. [2020-10-29 09:32:50,959 INFO L78 Accepts]: Start accepts. Automaton has 834 states and 1424 transitions. Word has length 28 [2020-10-29 09:32:50,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:32:50,959 INFO L481 AbstractCegarLoop]: Abstraction has 834 states and 1424 transitions. [2020-10-29 09:32:50,959 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 09:32:50,959 INFO L276 IsEmpty]: Start isEmpty. Operand 834 states and 1424 transitions. [2020-10-29 09:32:50,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-29 09:32:50,961 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:32:50,962 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:32:50,962 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-29 09:32:50,962 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:32:50,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:32:50,963 INFO L82 PathProgramCache]: Analyzing trace with hash 207679985, now seen corresponding path program 1 times [2020-10-29 09:32:50,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:32:50,963 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1834823537] [2020-10-29 09:32:50,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:32:50,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:32:50,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:32:50,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:32:51,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:32:51,150 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:32:51,151 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-29 09:32:51,151 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:32:51,151 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 173 [2020-10-29 09:32:51,151 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:32:51,151 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:32:51,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:32:51,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-29 09:32:51,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-29 09:32:51,152 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:32:51,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:32:51,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:32:51,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:32:51,206 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:32:51,207 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:32:51,207 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:32:51,207 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:32:51,207 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:32:51,207 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:32:51,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:32:51,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:32:51,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:32:51,209 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:32:51,213 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:32:51,214 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1834823537] [2020-10-29 09:32:51,214 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:32:51,214 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 09:32:51,214 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704510925] [2020-10-29 09:32:51,215 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 09:32:51,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:32:51,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 09:32:51,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 09:32:51,216 INFO L87 Difference]: Start difference. First operand 834 states and 1424 transitions. Second operand 4 states. [2020-10-29 09:32:51,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:32:51,439 INFO L93 Difference]: Finished difference Result 1974 states and 3395 transitions. [2020-10-29 09:32:51,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-29 09:32:51,439 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 28 [2020-10-29 09:32:51,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:32:51,447 INFO L225 Difference]: With dead ends: 1974 [2020-10-29 09:32:51,447 INFO L226 Difference]: Without dead ends: 1155 [2020-10-29 09:32:51,449 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 [2020-10-29 09:32:51,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1155 states. [2020-10-29 09:32:51,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1155 to 1154. [2020-10-29 09:32:51,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1154 states. [2020-10-29 09:32:51,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1154 states to 1154 states and 1960 transitions. [2020-10-29 09:32:51,505 INFO L78 Accepts]: Start accepts. Automaton has 1154 states and 1960 transitions. Word has length 28 [2020-10-29 09:32:51,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:32:51,505 INFO L481 AbstractCegarLoop]: Abstraction has 1154 states and 1960 transitions. [2020-10-29 09:32:51,505 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 09:32:51,505 INFO L276 IsEmpty]: Start isEmpty. Operand 1154 states and 1960 transitions. [2020-10-29 09:32:51,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-29 09:32:51,507 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:32:51,507 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:32:51,507 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-29 09:32:51,507 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:32:51,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:32:51,508 INFO L82 PathProgramCache]: Analyzing trace with hash -556876565, now seen corresponding path program 1 times [2020-10-29 09:32:51,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:32:51,509 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1209549648] [2020-10-29 09:32:51,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:32:51,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:32:51,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:32:51,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:32:51,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:32:51,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:32:51,911 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:32:51,911 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-29 09:32:51,911 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 09:32:51,912 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 391 [2020-10-29 09:32:51,912 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:32:51,912 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:32:51,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:32:51,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-29 09:32:51,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-29 09:32:51,912 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:32:51,961 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:32:51,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:32:51,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:32:51,968 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:32:51,968 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:32:51,968 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:32:51,969 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:32:51,969 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:32:51,969 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:32:51,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:32:51,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:32:51,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:32:51,970 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:32:51,975 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:32:51,976 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1209549648] [2020-10-29 09:32:51,976 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:32:51,976 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 09:32:51,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784489736] [2020-10-29 09:32:51,977 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 09:32:51,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:32:51,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 09:32:51,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 09:32:51,979 INFO L87 Difference]: Start difference. First operand 1154 states and 1960 transitions. Second operand 4 states. [2020-10-29 09:32:52,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:32:52,182 INFO L93 Difference]: Finished difference Result 1742 states and 2955 transitions. [2020-10-29 09:32:52,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-29 09:32:52,183 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 29 [2020-10-29 09:32:52,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:32:52,189 INFO L225 Difference]: With dead ends: 1742 [2020-10-29 09:32:52,189 INFO L226 Difference]: Without dead ends: 1179 [2020-10-29 09:32:52,191 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 [2020-10-29 09:32:52,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1179 states. [2020-10-29 09:32:52,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1179 to 1178. [2020-10-29 09:32:52,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1178 states. [2020-10-29 09:32:52,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1178 states to 1178 states and 1976 transitions. [2020-10-29 09:32:52,261 INFO L78 Accepts]: Start accepts. Automaton has 1178 states and 1976 transitions. Word has length 29 [2020-10-29 09:32:52,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:32:52,262 INFO L481 AbstractCegarLoop]: Abstraction has 1178 states and 1976 transitions. [2020-10-29 09:32:52,262 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 09:32:52,262 INFO L276 IsEmpty]: Start isEmpty. Operand 1178 states and 1976 transitions. [2020-10-29 09:32:52,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-29 09:32:52,264 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:32:52,264 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:32:52,266 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-29 09:32:52,266 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:32:52,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:32:52,267 INFO L82 PathProgramCache]: Analyzing trace with hash -2145224467, now seen corresponding path program 1 times [2020-10-29 09:32:52,267 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:32:52,267 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [284538078] [2020-10-29 09:32:52,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:32:52,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:32:52,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:32:52,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:32:52,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:32:52,467 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:32:52,467 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-29 09:32:52,468 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:32:52,468 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 186 [2020-10-29 09:32:52,468 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:32:52,468 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:32:52,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:32:52,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-29 09:32:52,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-29 09:32:52,469 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:32:52,524 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:32:52,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:32:52,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:32:52,534 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:32:52,534 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:32:52,534 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:32:52,535 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 09:32:52,535 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:32:52,535 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:32:52,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:32:52,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:32:52,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:32:52,536 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:32:52,542 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:32:52,543 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [284538078] [2020-10-29 09:32:52,543 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:32:52,543 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 09:32:52,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272678651] [2020-10-29 09:32:52,544 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 09:32:52,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:32:52,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 09:32:52,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 09:32:52,546 INFO L87 Difference]: Start difference. First operand 1178 states and 1976 transitions. Second operand 4 states. [2020-10-29 09:32:52,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:32:52,785 INFO L93 Difference]: Finished difference Result 2126 states and 3611 transitions. [2020-10-29 09:32:52,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-29 09:32:52,786 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 29 [2020-10-29 09:32:52,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:32:52,798 INFO L225 Difference]: With dead ends: 2126 [2020-10-29 09:32:52,798 INFO L226 Difference]: Without dead ends: 2123 [2020-10-29 09:32:52,800 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 [2020-10-29 09:32:52,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2123 states. [2020-10-29 09:32:52,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2123 to 1674. [2020-10-29 09:32:52,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1674 states. [2020-10-29 09:32:52,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1674 states to 1674 states and 2744 transitions. [2020-10-29 09:32:52,878 INFO L78 Accepts]: Start accepts. Automaton has 1674 states and 2744 transitions. Word has length 29 [2020-10-29 09:32:52,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:32:52,879 INFO L481 AbstractCegarLoop]: Abstraction has 1674 states and 2744 transitions. [2020-10-29 09:32:52,879 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 09:32:52,880 INFO L276 IsEmpty]: Start isEmpty. Operand 1674 states and 2744 transitions. [2020-10-29 09:32:52,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-29 09:32:52,882 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:32:52,883 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:32:52,883 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-29 09:32:52,883 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:32:52,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:32:52,884 INFO L82 PathProgramCache]: Analyzing trace with hash 1128674475, now seen corresponding path program 1 times [2020-10-29 09:32:52,884 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:32:52,890 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1350478966] [2020-10-29 09:32:52,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:32:52,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:32:52,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:32:52,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:32:52,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:32:53,098 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:32:53,099 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-29 09:32:53,099 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:32:53,099 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 195 [2020-10-29 09:32:53,100 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:32:53,100 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:32:53,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:32:53,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-29 09:32:53,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-29 09:32:53,101 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:32:53,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:32:53,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:32:53,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:32:53,178 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:32:53,178 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:32:53,178 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:32:53,179 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:32:53,179 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:32:53,179 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:32:53,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:32:53,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:32:53,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:32:53,180 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:32:53,186 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:32:53,187 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1350478966] [2020-10-29 09:32:53,187 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:32:53,187 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 09:32:53,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737207610] [2020-10-29 09:32:53,188 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 09:32:53,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:32:53,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 09:32:53,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 09:32:53,189 INFO L87 Difference]: Start difference. First operand 1674 states and 2744 transitions. Second operand 4 states. [2020-10-29 09:32:53,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:32:53,437 INFO L93 Difference]: Finished difference Result 3918 states and 6459 transitions. [2020-10-29 09:32:53,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-29 09:32:53,438 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 29 [2020-10-29 09:32:53,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:32:53,451 INFO L225 Difference]: With dead ends: 3918 [2020-10-29 09:32:53,451 INFO L226 Difference]: Without dead ends: 2283 [2020-10-29 09:32:53,459 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 [2020-10-29 09:32:53,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2283 states. [2020-10-29 09:32:53,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2283 to 2282. [2020-10-29 09:32:53,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2282 states. [2020-10-29 09:32:53,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2282 states to 2282 states and 3720 transitions. [2020-10-29 09:32:53,555 INFO L78 Accepts]: Start accepts. Automaton has 2282 states and 3720 transitions. Word has length 29 [2020-10-29 09:32:53,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:32:53,555 INFO L481 AbstractCegarLoop]: Abstraction has 2282 states and 3720 transitions. [2020-10-29 09:32:53,555 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 09:32:53,555 INFO L276 IsEmpty]: Start isEmpty. Operand 2282 states and 3720 transitions. [2020-10-29 09:32:53,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-29 09:32:53,560 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:32:53,560 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:32:53,560 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-29 09:32:53,560 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:32:53,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:32:53,561 INFO L82 PathProgramCache]: Analyzing trace with hash -2070807876, now seen corresponding path program 1 times [2020-10-29 09:32:53,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:32:53,561 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1894021556] [2020-10-29 09:32:53,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:32:53,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:32:53,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:32:53,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:32:53,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:32:53,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:32:53,902 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:32:53,902 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-29 09:32:53,902 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 09:32:53,903 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 327 [2020-10-29 09:32:53,903 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:32:53,903 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:32:53,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:32:53,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-29 09:32:53,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-29 09:32:53,904 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:32:53,944 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:32:53,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:32:53,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:32:53,950 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:32:53,950 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:32:53,950 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:32:53,951 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:32:53,951 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:32:53,951 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:32:53,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:32:53,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:32:53,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:32:53,951 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:32:53,955 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:32:53,956 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1894021556] [2020-10-29 09:32:53,957 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:32:53,957 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 09:32:53,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959573377] [2020-10-29 09:32:53,958 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 09:32:53,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:32:53,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 09:32:53,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 09:32:53,959 INFO L87 Difference]: Start difference. First operand 2282 states and 3720 transitions. Second operand 4 states. [2020-10-29 09:32:54,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:32:54,197 INFO L93 Difference]: Finished difference Result 3422 states and 5563 transitions. [2020-10-29 09:32:54,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-29 09:32:54,198 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 30 [2020-10-29 09:32:54,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:32:54,210 INFO L225 Difference]: With dead ends: 3422 [2020-10-29 09:32:54,211 INFO L226 Difference]: Without dead ends: 2315 [2020-10-29 09:32:54,215 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 [2020-10-29 09:32:54,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2315 states. [2020-10-29 09:32:54,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2315 to 2314. [2020-10-29 09:32:54,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2314 states. [2020-10-29 09:32:54,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2314 states to 2314 states and 3720 transitions. [2020-10-29 09:32:54,308 INFO L78 Accepts]: Start accepts. Automaton has 2314 states and 3720 transitions. Word has length 30 [2020-10-29 09:32:54,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:32:54,309 INFO L481 AbstractCegarLoop]: Abstraction has 2314 states and 3720 transitions. [2020-10-29 09:32:54,309 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 09:32:54,309 INFO L276 IsEmpty]: Start isEmpty. Operand 2314 states and 3720 transitions. [2020-10-29 09:32:54,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-29 09:32:54,312 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:32:54,312 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:32:54,312 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-29 09:32:54,313 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:32:54,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:32:54,313 INFO L82 PathProgramCache]: Analyzing trace with hash 635811518, now seen corresponding path program 1 times [2020-10-29 09:32:54,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:32:54,313 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1176274129] [2020-10-29 09:32:54,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:32:54,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:32:54,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:32:54,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:32:54,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:32:54,477 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:32:54,478 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-29 09:32:54,478 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:32:54,478 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 153 [2020-10-29 09:32:54,478 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:32:54,478 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:32:54,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:32:54,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-29 09:32:54,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-29 09:32:54,479 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:32:54,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:32:54,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:32:54,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:32:54,548 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:32:54,549 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:32:54,549 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:32:54,549 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:32:54,549 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:32:54,549 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:32:54,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:32:54,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:32:54,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:32:54,550 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:32:54,554 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:32:54,554 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1176274129] [2020-10-29 09:32:54,557 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:32:54,558 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 09:32:54,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236665473] [2020-10-29 09:32:54,558 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 09:32:54,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:32:54,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 09:32:54,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 09:32:54,559 INFO L87 Difference]: Start difference. First operand 2314 states and 3720 transitions. Second operand 4 states. [2020-10-29 09:32:54,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:32:54,816 INFO L93 Difference]: Finished difference Result 3422 states and 5467 transitions. [2020-10-29 09:32:54,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-29 09:32:54,817 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 30 [2020-10-29 09:32:54,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:32:54,829 INFO L225 Difference]: With dead ends: 3422 [2020-10-29 09:32:54,830 INFO L226 Difference]: Without dead ends: 2315 [2020-10-29 09:32:54,833 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 [2020-10-29 09:32:54,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2315 states. [2020-10-29 09:32:54,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2315 to 2314. [2020-10-29 09:32:54,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2314 states. [2020-10-29 09:32:54,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2314 states to 2314 states and 3656 transitions. [2020-10-29 09:32:54,928 INFO L78 Accepts]: Start accepts. Automaton has 2314 states and 3656 transitions. Word has length 30 [2020-10-29 09:32:54,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:32:54,928 INFO L481 AbstractCegarLoop]: Abstraction has 2314 states and 3656 transitions. [2020-10-29 09:32:54,928 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 09:32:54,929 INFO L276 IsEmpty]: Start isEmpty. Operand 2314 states and 3656 transitions. [2020-10-29 09:32:54,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-29 09:32:54,932 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:32:54,932 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:32:54,932 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-29 09:32:54,932 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:32:54,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:32:54,933 INFO L82 PathProgramCache]: Analyzing trace with hash 854666236, now seen corresponding path program 1 times [2020-10-29 09:32:54,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:32:54,934 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [940076001] [2020-10-29 09:32:54,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:32:54,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:32:54,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:32:54,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:32:55,036 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:32:55,036 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-29 09:32:55,036 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:32:55,036 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 91 [2020-10-29 09:32:55,036 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:32:55,037 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:32:55,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:32:55,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-29 09:32:55,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-29 09:32:55,037 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:32:55,074 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:32:55,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:32:55,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:32:55,084 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:32:55,084 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:32:55,084 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:32:55,084 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-29 09:32:55,084 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:32:55,084 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:32:55,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:32:55,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:32:55,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:32:55,085 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:32:55,090 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:32:55,090 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [940076001] [2020-10-29 09:32:55,090 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:32:55,091 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 09:32:55,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621851497] [2020-10-29 09:32:55,091 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 09:32:55,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:32:55,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 09:32:55,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 09:32:55,095 INFO L87 Difference]: Start difference. First operand 2314 states and 3656 transitions. Second operand 4 states. [2020-10-29 09:32:55,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:32:55,315 INFO L93 Difference]: Finished difference Result 3422 states and 5371 transitions. [2020-10-29 09:32:55,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-29 09:32:55,315 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 30 [2020-10-29 09:32:55,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:32:55,327 INFO L225 Difference]: With dead ends: 3422 [2020-10-29 09:32:55,327 INFO L226 Difference]: Without dead ends: 2315 [2020-10-29 09:32:55,349 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 [2020-10-29 09:32:55,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2315 states. [2020-10-29 09:32:55,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2315 to 2314. [2020-10-29 09:32:55,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2314 states. [2020-10-29 09:32:55,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2314 states to 2314 states and 3592 transitions. [2020-10-29 09:32:55,432 INFO L78 Accepts]: Start accepts. Automaton has 2314 states and 3592 transitions. Word has length 30 [2020-10-29 09:32:55,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:32:55,432 INFO L481 AbstractCegarLoop]: Abstraction has 2314 states and 3592 transitions. [2020-10-29 09:32:55,432 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 09:32:55,432 INFO L276 IsEmpty]: Start isEmpty. Operand 2314 states and 3592 transitions. [2020-10-29 09:32:55,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-29 09:32:55,435 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:32:55,436 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:32:55,436 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-29 09:32:55,436 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:32:55,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:32:55,437 INFO L82 PathProgramCache]: Analyzing trace with hash -834277506, now seen corresponding path program 1 times [2020-10-29 09:32:55,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:32:55,437 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [766242365] [2020-10-29 09:32:55,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:32:55,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:32:55,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:32:55,476 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:32:55,477 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-29 09:32:55,477 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:32:55,477 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 30 [2020-10-29 09:32:55,477 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:32:55,477 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:32:55,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:32:55,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-29 09:32:55,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-29 09:32:55,478 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:32:55,513 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:32:55,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:32:55,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:32:55,520 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:32:55,520 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:32:55,520 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:32:55,520 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:32:55,520 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:32:55,521 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:32:55,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:32:55,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:32:55,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:32:55,521 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:32:55,525 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:32:55,526 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [766242365] [2020-10-29 09:32:55,526 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:32:55,526 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 09:32:55,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180969568] [2020-10-29 09:32:55,528 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 09:32:55,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:32:55,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 09:32:55,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 09:32:55,529 INFO L87 Difference]: Start difference. First operand 2314 states and 3592 transitions. Second operand 4 states. [2020-10-29 09:32:55,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:32:55,778 INFO L93 Difference]: Finished difference Result 4110 states and 6507 transitions. [2020-10-29 09:32:55,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-29 09:32:55,779 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 30 [2020-10-29 09:32:55,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:32:55,800 INFO L225 Difference]: With dead ends: 4110 [2020-10-29 09:32:55,800 INFO L226 Difference]: Without dead ends: 4107 [2020-10-29 09:32:55,802 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 [2020-10-29 09:32:55,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4107 states. [2020-10-29 09:32:55,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4107 to 3338. [2020-10-29 09:32:55,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3338 states. [2020-10-29 09:32:55,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3338 states to 3338 states and 5032 transitions. [2020-10-29 09:32:55,924 INFO L78 Accepts]: Start accepts. Automaton has 3338 states and 5032 transitions. Word has length 30 [2020-10-29 09:32:55,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:32:55,925 INFO L481 AbstractCegarLoop]: Abstraction has 3338 states and 5032 transitions. [2020-10-29 09:32:55,925 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 09:32:55,925 INFO L276 IsEmpty]: Start isEmpty. Operand 3338 states and 5032 transitions. [2020-10-29 09:32:55,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-29 09:32:55,930 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:32:55,930 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:32:55,930 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-29 09:32:55,931 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:32:55,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:32:55,931 INFO L82 PathProgramCache]: Analyzing trace with hash -1855345860, now seen corresponding path program 1 times [2020-10-29 09:32:55,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:32:55,933 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2145549393] [2020-10-29 09:32:55,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:32:55,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:32:55,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:32:55,983 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:32:55,984 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-29 09:32:55,984 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:32:55,984 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 39 [2020-10-29 09:32:55,984 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:32:55,984 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:32:55,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:32:55,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-29 09:32:55,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-29 09:32:55,985 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:32:56,048 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:32:56,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:32:56,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:32:56,054 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:32:56,055 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:32:56,055 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:32:56,055 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:32:56,055 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:32:56,055 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:32:56,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:32:56,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:32:56,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:32:56,056 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:32:56,060 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:32:56,061 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2145549393] [2020-10-29 09:32:56,061 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:32:56,061 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 09:32:56,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448490937] [2020-10-29 09:32:56,063 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 09:32:56,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:32:56,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 09:32:56,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 09:32:56,064 INFO L87 Difference]: Start difference. First operand 3338 states and 5032 transitions. Second operand 4 states. [2020-10-29 09:32:56,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:32:56,364 INFO L93 Difference]: Finished difference Result 7758 states and 11755 transitions. [2020-10-29 09:32:56,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-29 09:32:56,364 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 30 [2020-10-29 09:32:56,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:32:56,403 INFO L225 Difference]: With dead ends: 7758 [2020-10-29 09:32:56,403 INFO L226 Difference]: Without dead ends: 4491 [2020-10-29 09:32:56,410 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 [2020-10-29 09:32:56,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4491 states. [2020-10-29 09:32:56,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4491 to 4490. [2020-10-29 09:32:56,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4490 states. [2020-10-29 09:32:56,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4490 states to 4490 states and 6728 transitions. [2020-10-29 09:32:56,572 INFO L78 Accepts]: Start accepts. Automaton has 4490 states and 6728 transitions. Word has length 30 [2020-10-29 09:32:56,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:32:56,573 INFO L481 AbstractCegarLoop]: Abstraction has 4490 states and 6728 transitions. [2020-10-29 09:32:56,573 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 09:32:56,573 INFO L276 IsEmpty]: Start isEmpty. Operand 4490 states and 6728 transitions. [2020-10-29 09:32:56,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-29 09:32:56,581 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:32:56,582 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:32:56,582 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-29 09:32:56,582 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:32:56,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:32:56,582 INFO L82 PathProgramCache]: Analyzing trace with hash -86147178, now seen corresponding path program 1 times [2020-10-29 09:32:56,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:32:56,583 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [754813937] [2020-10-29 09:32:56,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:32:56,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:32:56,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:32:56,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:32:56,671 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:32:56,671 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-29 09:32:56,671 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:32:56,671 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 77 [2020-10-29 09:32:56,672 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:32:56,672 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:32:56,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:32:56,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-29 09:32:56,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-29 09:32:56,672 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:32:56,712 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:32:56,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:32:56,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:32:56,717 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:32:56,718 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:32:56,718 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:32:56,718 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:32:56,718 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:32:56,718 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:32:56,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:32:56,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:32:56,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:32:56,719 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:32:56,725 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:32:56,725 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [754813937] [2020-10-29 09:32:56,726 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:32:56,726 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 09:32:56,726 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263992818] [2020-10-29 09:32:56,726 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 09:32:56,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:32:56,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 09:32:56,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 09:32:56,727 INFO L87 Difference]: Start difference. First operand 4490 states and 6728 transitions. Second operand 4 states. [2020-10-29 09:32:57,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:32:57,057 INFO L93 Difference]: Finished difference Result 7886 states and 12043 transitions. [2020-10-29 09:32:57,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-29 09:32:57,058 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 31 [2020-10-29 09:32:57,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:32:57,075 INFO L225 Difference]: With dead ends: 7886 [2020-10-29 09:32:57,075 INFO L226 Difference]: Without dead ends: 7883 [2020-10-29 09:32:57,077 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 [2020-10-29 09:32:57,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7883 states. [2020-10-29 09:32:57,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7883 to 6602. [2020-10-29 09:32:57,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6602 states. [2020-10-29 09:32:57,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6602 states to 6602 states and 9608 transitions. [2020-10-29 09:32:57,281 INFO L78 Accepts]: Start accepts. Automaton has 6602 states and 9608 transitions. Word has length 31 [2020-10-29 09:32:57,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:32:57,281 INFO L481 AbstractCegarLoop]: Abstraction has 6602 states and 9608 transitions. [2020-10-29 09:32:57,281 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 09:32:57,281 INFO L276 IsEmpty]: Start isEmpty. Operand 6602 states and 9608 transitions. [2020-10-29 09:32:57,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-29 09:32:57,292 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:32:57,293 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:32:57,293 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-29 09:32:57,293 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:32:57,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:32:57,294 INFO L82 PathProgramCache]: Analyzing trace with hash -1107215532, now seen corresponding path program 1 times [2020-10-29 09:32:57,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:32:57,294 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1837225950] [2020-10-29 09:32:57,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:32:57,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:32:57,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:32:57,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:32:57,379 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:32:57,380 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-29 09:32:57,380 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:32:57,380 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 72 [2020-10-29 09:32:57,380 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:32:57,380 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:32:57,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:32:57,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-29 09:32:57,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-29 09:32:57,381 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:32:57,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:32:57,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:32:57,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:32:57,425 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:32:57,425 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:32:57,425 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:32:57,425 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:32:57,426 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:32:57,426 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:32:57,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:32:57,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:32:57,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:32:57,426 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:32:57,430 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:32:57,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1837225950] [2020-10-29 09:32:57,432 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:32:57,432 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 09:32:57,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119222700] [2020-10-29 09:32:57,433 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 09:32:57,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:32:57,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 09:32:57,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 09:32:57,434 INFO L87 Difference]: Start difference. First operand 6602 states and 9608 transitions. Second operand 4 states. [2020-10-29 09:32:57,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:32:57,809 INFO L93 Difference]: Finished difference Result 15310 states and 22411 transitions. [2020-10-29 09:32:57,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-29 09:32:57,809 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 31 [2020-10-29 09:32:57,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:32:57,827 INFO L225 Difference]: With dead ends: 15310 [2020-10-29 09:32:57,827 INFO L226 Difference]: Without dead ends: 8779 [2020-10-29 09:32:57,840 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 [2020-10-29 09:32:57,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8779 states. [2020-10-29 09:32:58,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8779 to 8778. [2020-10-29 09:32:58,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8778 states. [2020-10-29 09:32:58,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8778 states to 8778 states and 12680 transitions. [2020-10-29 09:32:58,226 INFO L78 Accepts]: Start accepts. Automaton has 8778 states and 12680 transitions. Word has length 31 [2020-10-29 09:32:58,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:32:58,226 INFO L481 AbstractCegarLoop]: Abstraction has 8778 states and 12680 transitions. [2020-10-29 09:32:58,226 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 09:32:58,227 INFO L276 IsEmpty]: Start isEmpty. Operand 8778 states and 12680 transitions. [2020-10-29 09:32:58,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-29 09:32:58,237 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:32:58,238 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:32:58,238 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-29 09:32:58,238 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:32:58,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:32:58,238 INFO L82 PathProgramCache]: Analyzing trace with hash 1631067081, now seen corresponding path program 1 times [2020-10-29 09:32:58,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:32:58,239 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1983241330] [2020-10-29 09:32:58,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:32:58,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:32:58,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:32:58,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:32:58,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:32:58,386 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:32:58,386 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-29 09:32:58,386 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:32:58,386 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 137 [2020-10-29 09:32:58,386 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:32:58,387 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:32:58,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:32:58,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-29 09:32:58,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-29 09:32:58,387 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:32:58,425 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:32:58,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:32:58,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:32:58,431 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:32:58,431 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:32:58,431 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:32:58,431 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:32:58,431 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:32:58,432 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:32:58,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:32:58,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:32:58,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:32:58,432 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:32:58,437 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:32:58,437 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1983241330] [2020-10-29 09:32:58,437 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:32:58,437 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 09:32:58,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763320099] [2020-10-29 09:32:58,438 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 09:32:58,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:32:58,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 09:32:58,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 09:32:58,439 INFO L87 Difference]: Start difference. First operand 8778 states and 12680 transitions. Second operand 4 states. [2020-10-29 09:32:58,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:32:58,749 INFO L93 Difference]: Finished difference Result 13134 states and 18891 transitions. [2020-10-29 09:32:58,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-29 09:32:58,750 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 32 [2020-10-29 09:32:58,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:32:58,768 INFO L225 Difference]: With dead ends: 13134 [2020-10-29 09:32:58,768 INFO L226 Difference]: Without dead ends: 8843 [2020-10-29 09:32:58,779 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 [2020-10-29 09:32:58,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8843 states. [2020-10-29 09:32:59,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8843 to 8842. [2020-10-29 09:32:59,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8842 states. [2020-10-29 09:32:59,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8842 states to 8842 states and 12552 transitions. [2020-10-29 09:32:59,164 INFO L78 Accepts]: Start accepts. Automaton has 8842 states and 12552 transitions. Word has length 32 [2020-10-29 09:32:59,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:32:59,164 INFO L481 AbstractCegarLoop]: Abstraction has 8842 states and 12552 transitions. [2020-10-29 09:32:59,164 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 09:32:59,164 INFO L276 IsEmpty]: Start isEmpty. Operand 8842 states and 12552 transitions. [2020-10-29 09:32:59,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-29 09:32:59,176 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:32:59,176 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:32:59,177 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-29 09:32:59,177 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:32:59,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:32:59,177 INFO L82 PathProgramCache]: Analyzing trace with hash -363077625, now seen corresponding path program 1 times [2020-10-29 09:32:59,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:32:59,178 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2007105706] [2020-10-29 09:32:59,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:32:59,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:32:59,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:32:59,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:32:59,273 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:32:59,274 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-29 09:32:59,274 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:32:59,274 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 85 [2020-10-29 09:32:59,274 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:32:59,274 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:32:59,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:32:59,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-29 09:32:59,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-29 09:32:59,275 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:32:59,317 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:32:59,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:32:59,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:32:59,323 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:32:59,323 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:32:59,323 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:32:59,323 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:32:59,323 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:32:59,324 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:32:59,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:32:59,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:32:59,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:32:59,324 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:32:59,331 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:32:59,331 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2007105706] [2020-10-29 09:32:59,332 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:32:59,332 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 09:32:59,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716095476] [2020-10-29 09:32:59,334 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 09:32:59,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:32:59,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 09:32:59,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 09:32:59,339 INFO L87 Difference]: Start difference. First operand 8842 states and 12552 transitions. Second operand 4 states. [2020-10-29 09:32:59,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:32:59,678 INFO L93 Difference]: Finished difference Result 13262 states and 18763 transitions. [2020-10-29 09:32:59,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-29 09:32:59,679 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 32 [2020-10-29 09:32:59,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:32:59,697 INFO L225 Difference]: With dead ends: 13262 [2020-10-29 09:32:59,697 INFO L226 Difference]: Without dead ends: 8971 [2020-10-29 09:32:59,708 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 [2020-10-29 09:32:59,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8971 states. [2020-10-29 09:33:00,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8971 to 8970. [2020-10-29 09:33:00,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8970 states. [2020-10-29 09:33:00,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8970 states to 8970 states and 12552 transitions. [2020-10-29 09:33:00,027 INFO L78 Accepts]: Start accepts. Automaton has 8970 states and 12552 transitions. Word has length 32 [2020-10-29 09:33:00,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:33:00,028 INFO L481 AbstractCegarLoop]: Abstraction has 8970 states and 12552 transitions. [2020-10-29 09:33:00,028 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 09:33:00,028 INFO L276 IsEmpty]: Start isEmpty. Operand 8970 states and 12552 transitions. [2020-10-29 09:33:00,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-29 09:33:00,039 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:33:00,039 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:33:00,039 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-29 09:33:00,039 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:33:00,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:33:00,040 INFO L82 PathProgramCache]: Analyzing trace with hash -1951425527, now seen corresponding path program 1 times [2020-10-29 09:33:00,040 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:33:00,040 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1308205205] [2020-10-29 09:33:00,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:33:00,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:33:00,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:00,086 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:33:00,086 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-29 09:33:00,086 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:33:00,086 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 30 [2020-10-29 09:33:00,087 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:33:00,087 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:33:00,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:33:00,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-29 09:33:00,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-29 09:33:00,087 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:33:00,126 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:33:00,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:33:00,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:00,131 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:33:00,131 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:33:00,131 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:33:00,131 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:33:00,132 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:33:00,132 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:33:00,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:33:00,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:33:00,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:33:00,132 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:33:00,136 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:33:00,137 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1308205205] [2020-10-29 09:33:00,137 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:33:00,137 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 09:33:00,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741359342] [2020-10-29 09:33:00,137 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 09:33:00,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:33:00,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 09:33:00,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 09:33:00,138 INFO L87 Difference]: Start difference. First operand 8970 states and 12552 transitions. Second operand 4 states. [2020-10-29 09:33:00,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:33:00,541 INFO L93 Difference]: Finished difference Result 15374 states and 21899 transitions. [2020-10-29 09:33:00,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-29 09:33:00,542 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 32 [2020-10-29 09:33:00,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:33:00,573 INFO L225 Difference]: With dead ends: 15374 [2020-10-29 09:33:00,574 INFO L226 Difference]: Without dead ends: 15371 [2020-10-29 09:33:00,581 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 [2020-10-29 09:33:00,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15371 states. [2020-10-29 09:33:00,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15371 to 13322. [2020-10-29 09:33:00,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13322 states. [2020-10-29 09:33:01,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13322 states to 13322 states and 18056 transitions. [2020-10-29 09:33:01,011 INFO L78 Accepts]: Start accepts. Automaton has 13322 states and 18056 transitions. Word has length 32 [2020-10-29 09:33:01,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:33:01,011 INFO L481 AbstractCegarLoop]: Abstraction has 13322 states and 18056 transitions. [2020-10-29 09:33:01,011 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 09:33:01,011 INFO L276 IsEmpty]: Start isEmpty. Operand 13322 states and 18056 transitions. [2020-10-29 09:33:01,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-29 09:33:01,033 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:33:01,033 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:33:01,035 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-29 09:33:01,035 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:33:01,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:33:01,036 INFO L82 PathProgramCache]: Analyzing trace with hash 1322473415, now seen corresponding path program 1 times [2020-10-29 09:33:01,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:33:01,036 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1089080417] [2020-10-29 09:33:01,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:33:01,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:33:01,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:01,077 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:33:01,077 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-29 09:33:01,077 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:33:01,078 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-10-29 09:33:01,078 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:33:01,078 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:33:01,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:33:01,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-29 09:33:01,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-29 09:33:01,078 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:33:01,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:33:01,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:33:01,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:01,123 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:33:01,123 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:33:01,123 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:33:01,123 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:33:01,123 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:33:01,124 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:33:01,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:33:01,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:33:01,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:33:01,124 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:33:01,128 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:33:01,128 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1089080417] [2020-10-29 09:33:01,128 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:33:01,129 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 09:33:01,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064829460] [2020-10-29 09:33:01,129 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 09:33:01,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:33:01,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 09:33:01,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 09:33:01,130 INFO L87 Difference]: Start difference. First operand 13322 states and 18056 transitions. Second operand 4 states. [2020-10-29 09:33:01,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:33:01,604 INFO L93 Difference]: Finished difference Result 30478 states and 41355 transitions. [2020-10-29 09:33:01,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-29 09:33:01,605 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 32 [2020-10-29 09:33:01,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:33:01,639 INFO L225 Difference]: With dead ends: 30478 [2020-10-29 09:33:01,639 INFO L226 Difference]: Without dead ends: 17419 [2020-10-29 09:33:01,667 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 [2020-10-29 09:33:01,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17419 states. [2020-10-29 09:33:02,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17419 to 17418. [2020-10-29 09:33:02,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17418 states. [2020-10-29 09:33:02,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17418 states to 17418 states and 23304 transitions. [2020-10-29 09:33:02,291 INFO L78 Accepts]: Start accepts. Automaton has 17418 states and 23304 transitions. Word has length 32 [2020-10-29 09:33:02,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:33:02,291 INFO L481 AbstractCegarLoop]: Abstraction has 17418 states and 23304 transitions. [2020-10-29 09:33:02,291 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 09:33:02,291 INFO L276 IsEmpty]: Start isEmpty. Operand 17418 states and 23304 transitions. [2020-10-29 09:33:02,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-29 09:33:02,313 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:33:02,313 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:33:02,313 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-29 09:33:02,314 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:33:02,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:33:02,314 INFO L82 PathProgramCache]: Analyzing trace with hash -357976319, now seen corresponding path program 1 times [2020-10-29 09:33:02,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:33:02,314 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [976940752] [2020-10-29 09:33:02,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:33:02,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:33:02,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:02,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:02,398 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:33:02,398 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-29 09:33:02,398 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:33:02,398 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 74 [2020-10-29 09:33:02,398 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:33:02,398 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:33:02,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:33:02,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-29 09:33:02,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-29 09:33:02,399 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:33:02,438 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:33:02,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:33:02,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:02,444 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:33:02,444 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:33:02,444 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:33:02,444 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:33:02,444 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:33:02,445 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:33:02,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:33:02,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:33:02,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:33:02,445 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:33:02,449 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:33:02,449 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [976940752] [2020-10-29 09:33:02,450 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:33:02,450 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 09:33:02,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428120663] [2020-10-29 09:33:02,451 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 09:33:02,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:33:02,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 09:33:02,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 09:33:02,452 INFO L87 Difference]: Start difference. First operand 17418 states and 23304 transitions. Second operand 4 states. [2020-10-29 09:33:03,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:33:03,350 INFO L93 Difference]: Finished difference Result 51214 states and 67851 transitions. [2020-10-29 09:33:03,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-29 09:33:03,351 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 33 [2020-10-29 09:33:03,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:33:03,425 INFO L225 Difference]: With dead ends: 51214 [2020-10-29 09:33:03,426 INFO L226 Difference]: Without dead ends: 34059 [2020-10-29 09:33:03,462 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 [2020-10-29 09:33:03,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34059 states. [2020-10-29 09:33:04,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34059 to 34058. [2020-10-29 09:33:04,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34058 states. [2020-10-29 09:33:04,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34058 states to 34058 states and 44040 transitions. [2020-10-29 09:33:04,600 INFO L78 Accepts]: Start accepts. Automaton has 34058 states and 44040 transitions. Word has length 33 [2020-10-29 09:33:04,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:33:04,600 INFO L481 AbstractCegarLoop]: Abstraction has 34058 states and 44040 transitions. [2020-10-29 09:33:04,600 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 09:33:04,601 INFO L276 IsEmpty]: Start isEmpty. Operand 34058 states and 44040 transitions. [2020-10-29 09:33:04,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-29 09:33:04,813 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:33:04,814 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:33:04,814 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-29 09:33:04,814 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:33:04,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:33:04,816 INFO L82 PathProgramCache]: Analyzing trace with hash 663092035, now seen corresponding path program 1 times [2020-10-29 09:33:04,816 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:33:04,816 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [874594113] [2020-10-29 09:33:04,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:33:04,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:33:04,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:04,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:04,896 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:33:04,897 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-29 09:33:04,897 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:33:04,897 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 70 [2020-10-29 09:33:04,897 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:33:04,897 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:33:04,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:33:04,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-29 09:33:04,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-29 09:33:04,898 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:33:04,937 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:33:04,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:33:04,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:04,943 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:33:04,943 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:33:04,943 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:33:04,943 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:33:04,944 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:33:04,944 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:33:04,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:33:04,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:33:04,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:33:04,945 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:33:04,949 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:33:04,949 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [874594113] [2020-10-29 09:33:04,949 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:33:04,949 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 09:33:04,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712360365] [2020-10-29 09:33:04,950 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 09:33:04,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:33:04,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 09:33:04,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 09:33:04,951 INFO L87 Difference]: Start difference. First operand 34058 states and 44040 transitions. Second operand 4 states. [2020-10-29 09:33:05,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:33:05,740 INFO L93 Difference]: Finished difference Result 37134 states and 49163 transitions. [2020-10-29 09:33:05,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-29 09:33:05,740 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 33 [2020-10-29 09:33:05,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:33:05,808 INFO L225 Difference]: With dead ends: 37134 [2020-10-29 09:33:05,808 INFO L226 Difference]: Without dead ends: 37131 [2020-10-29 09:33:05,816 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 [2020-10-29 09:33:05,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37131 states. [2020-10-29 09:33:06,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37131 to 34058. [2020-10-29 09:33:06,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34058 states. [2020-10-29 09:33:06,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34058 states to 34058 states and 43528 transitions. [2020-10-29 09:33:06,808 INFO L78 Accepts]: Start accepts. Automaton has 34058 states and 43528 transitions. Word has length 33 [2020-10-29 09:33:06,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:33:06,808 INFO L481 AbstractCegarLoop]: Abstraction has 34058 states and 43528 transitions. [2020-10-29 09:33:06,808 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 09:33:06,808 INFO L276 IsEmpty]: Start isEmpty. Operand 34058 states and 43528 transitions. [2020-10-29 09:33:06,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-29 09:33:06,826 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:33:06,826 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:33:06,826 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-29 09:33:06,826 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:33:06,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:33:06,827 INFO L82 PathProgramCache]: Analyzing trace with hash 1794319444, now seen corresponding path program 1 times [2020-10-29 09:33:06,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:33:06,827 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1968575206] [2020-10-29 09:33:06,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:33:06,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:33:06,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:06,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:06,896 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:33:06,896 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-29 09:33:06,896 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:33:06,896 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 60 [2020-10-29 09:33:06,897 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:33:06,897 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:33:06,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:33:06,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-29 09:33:06,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-29 09:33:06,897 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:33:06,939 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:33:06,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:33:06,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:06,944 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:33:06,944 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:33:06,945 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:33:06,945 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:33:06,945 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:33:06,945 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:33:06,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:33:06,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:33:06,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:33:06,945 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:33:06,949 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:33:06,949 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1968575206] [2020-10-29 09:33:06,949 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:33:06,949 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 09:33:06,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57453676] [2020-10-29 09:33:06,950 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 09:33:06,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:33:06,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 09:33:06,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 09:33:06,951 INFO L87 Difference]: Start difference. First operand 34058 states and 43528 transitions. Second operand 4 states. [2020-10-29 09:33:08,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:33:08,185 INFO L93 Difference]: Finished difference Result 56590 states and 72715 transitions. [2020-10-29 09:33:08,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-29 09:33:08,185 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 34 [2020-10-29 09:33:08,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:33:08,271 INFO L225 Difference]: With dead ends: 56590 [2020-10-29 09:33:08,271 INFO L226 Difference]: Without dead ends: 56587 [2020-10-29 09:33:08,284 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 [2020-10-29 09:33:08,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56587 states. [2020-10-29 09:33:09,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56587 to 52490. [2020-10-29 09:33:09,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52490 states. [2020-10-29 09:33:09,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52490 states to 52490 states and 65544 transitions. [2020-10-29 09:33:09,508 INFO L78 Accepts]: Start accepts. Automaton has 52490 states and 65544 transitions. Word has length 34 [2020-10-29 09:33:09,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:33:09,508 INFO L481 AbstractCegarLoop]: Abstraction has 52490 states and 65544 transitions. [2020-10-29 09:33:09,508 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 09:33:09,508 INFO L276 IsEmpty]: Start isEmpty. Operand 52490 states and 65544 transitions. [2020-10-29 09:33:09,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-29 09:33:09,727 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:33:09,727 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:33:09,727 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-29 09:33:09,728 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:33:09,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:33:09,732 INFO L82 PathProgramCache]: Analyzing trace with hash 773251090, now seen corresponding path program 1 times [2020-10-29 09:33:09,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:33:09,733 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [156457543] [2020-10-29 09:33:09,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:33:09,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:33:09,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:09,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:09,827 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:33:09,827 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-29 09:33:09,827 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:33:09,827 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 76 [2020-10-29 09:33:09,828 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:33:09,828 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:33:09,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:33:09,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-29 09:33:09,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-29 09:33:09,828 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:33:09,872 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:33:09,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:33:09,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:09,877 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:33:09,878 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:33:09,878 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:33:09,878 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:33:09,878 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:33:09,878 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:33:09,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:33:09,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:33:09,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:33:09,879 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:33:09,882 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:33:09,883 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [156457543] [2020-10-29 09:33:09,883 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:33:09,883 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 09:33:09,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870492712] [2020-10-29 09:33:09,884 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 09:33:09,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:33:09,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 09:33:09,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 09:33:09,884 INFO L87 Difference]: Start difference. First operand 52490 states and 65544 transitions. Second operand 4 states. [2020-10-29 09:33:11,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:33:11,195 INFO L93 Difference]: Finished difference Result 119054 states and 148491 transitions. [2020-10-29 09:33:11,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-29 09:33:11,196 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 34 [2020-10-29 09:33:11,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:33:11,277 INFO L225 Difference]: With dead ends: 119054 [2020-10-29 09:33:11,277 INFO L226 Difference]: Without dead ends: 66827 [2020-10-29 09:33:11,338 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 [2020-10-29 09:33:11,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66827 states. [2020-10-29 09:33:13,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66827 to 66826. [2020-10-29 09:33:13,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66826 states. [2020-10-29 09:33:13,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66826 states to 66826 states and 81416 transitions. [2020-10-29 09:33:13,141 INFO L78 Accepts]: Start accepts. Automaton has 66826 states and 81416 transitions. Word has length 34 [2020-10-29 09:33:13,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:33:13,142 INFO L481 AbstractCegarLoop]: Abstraction has 66826 states and 81416 transitions. [2020-10-29 09:33:13,142 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 09:33:13,142 INFO L276 IsEmpty]: Start isEmpty. Operand 66826 states and 81416 transitions. [2020-10-29 09:33:13,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-29 09:33:13,212 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:33:13,212 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:33:13,212 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-29 09:33:13,212 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:33:13,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:33:13,213 INFO L82 PathProgramCache]: Analyzing trace with hash -203978068, now seen corresponding path program 1 times [2020-10-29 09:33:13,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:33:13,213 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [990427254] [2020-10-29 09:33:13,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:33:13,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:33:13,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:13,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:13,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:13,360 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:33:13,360 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-29 09:33:13,361 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:33:13,361 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 135 [2020-10-29 09:33:13,361 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:33:13,361 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:33:13,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:33:13,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-29 09:33:13,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-29 09:33:13,362 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:33:13,401 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:33:13,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:33:13,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:13,406 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:33:13,407 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:33:13,407 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:33:13,407 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:33:13,407 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:33:13,407 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:33:13,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:33:13,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:33:13,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:33:13,408 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:33:13,412 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:33:13,413 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [990427254] [2020-10-29 09:33:13,413 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:33:13,413 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 09:33:13,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244395040] [2020-10-29 09:33:13,414 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 09:33:13,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:33:13,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 09:33:13,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 09:33:13,417 INFO L87 Difference]: Start difference. First operand 66826 states and 81416 transitions. Second operand 4 states. [2020-10-29 09:33:14,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:33:14,828 INFO L93 Difference]: Finished difference Result 99854 states and 120843 transitions. [2020-10-29 09:33:14,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-29 09:33:14,829 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 35 [2020-10-29 09:33:14,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:33:14,992 INFO L225 Difference]: With dead ends: 99854 [2020-10-29 09:33:14,992 INFO L226 Difference]: Without dead ends: 67083 [2020-10-29 09:33:15,020 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 [2020-10-29 09:33:15,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67083 states. [2020-10-29 09:33:16,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67083 to 67082. [2020-10-29 09:33:16,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67082 states. [2020-10-29 09:33:16,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67082 states to 67082 states and 79880 transitions. [2020-10-29 09:33:16,638 INFO L78 Accepts]: Start accepts. Automaton has 67082 states and 79880 transitions. Word has length 35 [2020-10-29 09:33:16,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:33:16,639 INFO L481 AbstractCegarLoop]: Abstraction has 67082 states and 79880 transitions. [2020-10-29 09:33:16,639 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 09:33:16,639 INFO L276 IsEmpty]: Start isEmpty. Operand 67082 states and 79880 transitions. [2020-10-29 09:33:16,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-29 09:33:16,671 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:33:16,671 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:33:16,671 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-29 09:33:16,671 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:33:16,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:33:16,672 INFO L82 PathProgramCache]: Analyzing trace with hash -1892921810, now seen corresponding path program 1 times [2020-10-29 09:33:16,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:33:16,672 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1166566938] [2020-10-29 09:33:16,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:33:16,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:33:16,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:16,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:16,748 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:33:16,748 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-29 09:33:16,749 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:33:16,749 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 67 [2020-10-29 09:33:16,749 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:33:16,749 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:33:16,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:33:16,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-29 09:33:16,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-29 09:33:16,750 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:33:16,791 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:33:16,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:33:16,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:16,797 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:33:16,797 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:33:16,797 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:33:16,797 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:33:16,797 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:33:16,797 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:33:16,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:33:16,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:33:16,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:33:16,798 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:33:16,802 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:33:16,802 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1166566938] [2020-10-29 09:33:16,802 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:33:16,802 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 09:33:16,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140201445] [2020-10-29 09:33:16,803 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 09:33:16,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:33:16,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 09:33:16,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 09:33:16,804 INFO L87 Difference]: Start difference. First operand 67082 states and 79880 transitions. Second operand 4 states. [2020-10-29 09:33:18,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:33:18,100 INFO L93 Difference]: Finished difference Result 101390 states and 120843 transitions. [2020-10-29 09:33:18,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-29 09:33:18,100 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 35 [2020-10-29 09:33:18,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:33:18,179 INFO L225 Difference]: With dead ends: 101390 [2020-10-29 09:33:18,179 INFO L226 Difference]: Without dead ends: 68619 [2020-10-29 09:33:18,205 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 [2020-10-29 09:33:18,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68619 states. [2020-10-29 09:33:19,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68619 to 68618. [2020-10-29 09:33:19,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68618 states. [2020-10-29 09:33:19,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68618 states to 68618 states and 80904 transitions. [2020-10-29 09:33:19,884 INFO L78 Accepts]: Start accepts. Automaton has 68618 states and 80904 transitions. Word has length 35 [2020-10-29 09:33:19,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:33:19,884 INFO L481 AbstractCegarLoop]: Abstraction has 68618 states and 80904 transitions. [2020-10-29 09:33:19,884 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 09:33:19,884 INFO L276 IsEmpty]: Start isEmpty. Operand 68618 states and 80904 transitions. [2020-10-29 09:33:19,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-29 09:33:19,922 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:33:19,923 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:33:19,923 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-29 09:33:19,923 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:33:19,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:33:19,923 INFO L82 PathProgramCache]: Analyzing trace with hash 813697584, now seen corresponding path program 1 times [2020-10-29 09:33:19,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:33:19,924 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1313797378] [2020-10-29 09:33:19,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:33:19,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:33:19,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:19,972 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:33:19,972 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-29 09:33:19,972 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:33:19,973 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 39 [2020-10-29 09:33:19,973 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:33:19,973 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:33:19,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:33:19,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-29 09:33:19,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-29 09:33:19,974 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:33:20,014 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:33:20,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:33:20,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:20,021 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:33:20,021 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:33:20,021 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:33:20,021 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:33:20,021 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:33:20,022 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:33:20,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:33:20,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:33:20,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:33:20,022 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:33:20,031 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:33:20,031 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1313797378] [2020-10-29 09:33:20,032 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:33:20,032 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 09:33:20,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510463346] [2020-10-29 09:33:20,032 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 09:33:20,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:33:20,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 09:33:20,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 09:33:20,033 INFO L87 Difference]: Start difference. First operand 68618 states and 80904 transitions. Second operand 4 states. [2020-10-29 09:33:21,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:33:21,895 INFO L93 Difference]: Finished difference Result 110605 states and 129034 transitions. [2020-10-29 09:33:21,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-29 09:33:21,895 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 35 [2020-10-29 09:33:21,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:33:22,089 INFO L225 Difference]: With dead ends: 110605 [2020-10-29 09:33:22,089 INFO L226 Difference]: Without dead ends: 110602 [2020-10-29 09:33:22,099 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 [2020-10-29 09:33:22,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110602 states. [2020-10-29 09:33:23,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110602 to 106506. [2020-10-29 09:33:23,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106506 states. [2020-10-29 09:33:24,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106506 states to 106506 states and 122888 transitions. [2020-10-29 09:33:24,148 INFO L78 Accepts]: Start accepts. Automaton has 106506 states and 122888 transitions. Word has length 35 [2020-10-29 09:33:24,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:33:24,154 INFO L481 AbstractCegarLoop]: Abstraction has 106506 states and 122888 transitions. [2020-10-29 09:33:24,154 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 09:33:24,154 INFO L276 IsEmpty]: Start isEmpty. Operand 106506 states and 122888 transitions. [2020-10-29 09:33:24,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-29 09:33:24,210 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:33:24,210 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:33:24,210 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-29 09:33:24,210 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:33:24,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:33:24,211 INFO L82 PathProgramCache]: Analyzing trace with hash -207370770, now seen corresponding path program 1 times [2020-10-29 09:33:24,211 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:33:24,211 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2053551211] [2020-10-29 09:33:24,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:33:24,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:33:24,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:24,246 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:33:24,247 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-29 09:33:24,247 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:33:24,247 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-10-29 09:33:24,247 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:33:24,247 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:33:24,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:33:24,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-29 09:33:24,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-29 09:33:24,248 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:33:24,292 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:33:24,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:33:24,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:24,297 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:33:24,297 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:33:24,298 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:33:24,298 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:33:24,298 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:33:24,298 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:33:24,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:33:24,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:33:24,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:33:24,299 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:33:24,302 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:33:24,303 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2053551211] [2020-10-29 09:33:24,303 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:33:24,303 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 09:33:24,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817801257] [2020-10-29 09:33:24,303 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 09:33:24,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:33:24,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 09:33:24,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 09:33:24,304 INFO L87 Difference]: Start difference. First operand 106506 states and 122888 transitions. Second operand 4 states. [2020-10-29 09:33:26,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:33:26,611 INFO L93 Difference]: Finished difference Result 237578 states and 270344 transitions. [2020-10-29 09:33:26,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-29 09:33:26,611 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 35 [2020-10-29 09:33:26,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:33:26,611 INFO L225 Difference]: With dead ends: 237578 [2020-10-29 09:33:26,612 INFO L226 Difference]: Without dead ends: 0 [2020-10-29 09:33:26,990 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 [2020-10-29 09:33:26,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-29 09:33:26,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-29 09:33:26,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-29 09:33:26,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-29 09:33:26,992 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 35 [2020-10-29 09:33:26,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:33:26,992 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-29 09:33:26,992 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 09:33:26,992 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-29 09:33:26,992 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-29 09:33:26,992 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-29 09:33:26,995 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions.