/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/loops/vogal-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-29 10:01:46,392 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-29 10:01:46,395 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-29 10:01:46,434 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-29 10:01:46,434 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-29 10:01:46,436 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-29 10:01:46,438 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-29 10:01:46,440 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-29 10:01:46,443 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-29 10:01:46,444 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-29 10:01:46,445 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-29 10:01:46,447 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-29 10:01:46,448 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-29 10:01:46,449 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-29 10:01:46,451 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-29 10:01:46,453 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-29 10:01:46,454 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-29 10:01:46,455 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-29 10:01:46,457 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-29 10:01:46,460 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-29 10:01:46,462 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-29 10:01:46,465 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-29 10:01:46,469 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-29 10:01:46,471 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-29 10:01:46,480 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-29 10:01:46,481 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-29 10:01:46,483 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-29 10:01:46,485 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-29 10:01:46,485 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-29 10:01:46,490 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-29 10:01:46,490 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-29 10:01:46,491 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-29 10:01:46,492 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-29 10:01:46,497 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-29 10:01:46,499 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-29 10:01:46,510 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-29 10:01:46,513 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-29 10:01:46,513 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-29 10:01:46,513 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-29 10:01:46,515 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-29 10:01:46,516 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-29 10:01:46,518 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 10:01:46,575 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-29 10:01:46,575 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-29 10:01:46,579 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-29 10:01:46,579 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-29 10:01:46,579 INFO L138 SettingsManager]: * Use SBE=true [2020-10-29 10:01:46,580 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-29 10:01:46,580 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-29 10:01:46,581 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-29 10:01:46,582 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-29 10:01:46,582 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-29 10:01:46,582 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-29 10:01:46,582 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-29 10:01:46,582 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-29 10:01:46,583 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-29 10:01:46,583 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-29 10:01:46,584 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-29 10:01:46,585 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-29 10:01:46,585 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-29 10:01:46,585 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-29 10:01:46,585 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-29 10:01:46,585 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-29 10:01:46,586 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 10:01:46,586 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-29 10:01:46,586 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-29 10:01:46,587 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-29 10:01:46,587 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-29 10:01:46,587 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-29 10:01:46,587 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-29 10:01:46,587 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-29 10:01:46,588 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true;unknown-allowed=true; [2020-10-29 10:01:47,012 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-29 10:01:47,041 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-29 10:01:47,044 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-29 10:01:47,046 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-29 10:01:47,047 INFO L275 PluginConnector]: CDTParser initialized [2020-10-29 10:01:47,048 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/vogal-2.i [2020-10-29 10:01:47,134 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/aa7ddd941/2592acab268542b1a80f6718d8c1d348/FLAG70dd4123b [2020-10-29 10:01:47,791 INFO L306 CDTParser]: Found 1 translation units. [2020-10-29 10:01:47,793 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/vogal-2.i [2020-10-29 10:01:47,801 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/aa7ddd941/2592acab268542b1a80f6718d8c1d348/FLAG70dd4123b [2020-10-29 10:01:48,124 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/aa7ddd941/2592acab268542b1a80f6718d8c1d348 [2020-10-29 10:01:48,134 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-29 10:01:48,141 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-29 10:01:48,143 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-29 10:01:48,144 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-29 10:01:48,148 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-29 10:01:48,149 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 10:01:48" (1/1) ... [2020-10-29 10:01:48,152 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7aecdd7f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 10:01:48, skipping insertion in model container [2020-10-29 10:01:48,152 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 10:01:48" (1/1) ... [2020-10-29 10:01:48,161 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-29 10:01:48,178 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-29 10:01:48,361 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 10:01:48,370 INFO L203 MainTranslator]: Completed pre-run [2020-10-29 10:01:48,398 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 10:01:48,417 INFO L208 MainTranslator]: Completed translation [2020-10-29 10:01:48,418 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 10:01:48 WrapperNode [2020-10-29 10:01:48,418 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-29 10:01:48,419 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-29 10:01:48,419 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-29 10:01:48,419 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-29 10:01:48,431 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 10:01:48" (1/1) ... [2020-10-29 10:01:48,432 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 10:01:48" (1/1) ... [2020-10-29 10:01:48,440 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 10:01:48" (1/1) ... [2020-10-29 10:01:48,440 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 10:01:48" (1/1) ... [2020-10-29 10:01:48,451 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 10:01:48" (1/1) ... [2020-10-29 10:01:48,458 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 10:01:48" (1/1) ... [2020-10-29 10:01:48,460 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 10:01:48" (1/1) ... [2020-10-29 10:01:48,463 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-29 10:01:48,464 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-29 10:01:48,464 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-29 10:01:48,465 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-29 10:01:48,466 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 10:01:48" (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 10:01:48,547 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-29 10:01:48,547 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-29 10:01:48,548 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-29 10:01:48,548 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-29 10:01:48,548 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-29 10:01:48,549 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-29 10:01:48,549 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-29 10:01:48,549 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-29 10:01:48,549 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-29 10:01:48,550 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-29 10:01:48,551 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-29 10:01:48,552 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-29 10:01:48,552 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-29 10:01:48,552 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-29 10:01:48,552 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-29 10:01:48,553 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-29 10:01:48,553 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-29 10:01:48,553 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-29 10:01:48,554 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-29 10:01:48,554 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-29 10:01:49,189 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-29 10:01:49,189 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-10-29 10:01:49,192 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 10:01:49 BoogieIcfgContainer [2020-10-29 10:01:49,192 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-29 10:01:49,194 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-29 10:01:49,195 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-29 10:01:49,198 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-29 10:01:49,198 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 10:01:48" (1/3) ... [2020-10-29 10:01:49,200 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19abc030 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 10:01:49, skipping insertion in model container [2020-10-29 10:01:49,200 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 10:01:48" (2/3) ... [2020-10-29 10:01:49,201 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19abc030 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 10:01:49, skipping insertion in model container [2020-10-29 10:01:49,201 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 10:01:49" (3/3) ... [2020-10-29 10:01:49,203 INFO L111 eAbstractionObserver]: Analyzing ICFG vogal-2.i [2020-10-29 10:01:49,217 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-29 10:01:49,227 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-29 10:01:49,242 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-29 10:01:49,293 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-29 10:01:49,293 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-29 10:01:49,294 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-29 10:01:49,294 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-29 10:01:49,294 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-29 10:01:49,294 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-29 10:01:49,294 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-29 10:01:49,294 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-29 10:01:49,318 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states. [2020-10-29 10:01:49,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-29 10:01:49,326 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 10:01:49,327 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 10:01:49,327 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 10:01:49,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 10:01:49,336 INFO L82 PathProgramCache]: Analyzing trace with hash -1191415629, now seen corresponding path program 1 times [2020-10-29 10:01:49,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 10:01:49,349 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [34369365] [2020-10-29 10:01:49,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 10:01:49,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 10:01:49,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:01:49,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:01:49,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:01:49,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:01:49,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:01:50,278 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 10:01:50,278 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-29 10:01:50,278 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 10:01:50,278 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 742 [2020-10-29 10:01:50,280 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 10:01:50,281 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 10:01:50,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-29 10:01:50,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-29 10:01:50,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-29 10:01:50,283 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-29 10:01:50,459 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 10:01:50,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 10:01:50,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:01:50,471 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 10:01:50,472 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 10:01:50,472 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 10:01:50,472 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-29 10:01:50,472 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 10:01:50,472 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 10:01:50,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 10:01:50,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 10:01:50,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 10:01:50,473 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 10:01:50,483 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 10:01:50,483 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [34369365] [2020-10-29 10:01:50,485 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 10:01:50,486 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-29 10:01:50,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801298310] [2020-10-29 10:01:50,491 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 10:01:50,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 10:01:50,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 10:01:50,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-29 10:01:50,509 INFO L87 Difference]: Start difference. First operand 41 states. Second operand 7 states. [2020-10-29 10:01:50,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 10:01:50,813 INFO L93 Difference]: Finished difference Result 101 states and 150 transitions. [2020-10-29 10:01:50,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-29 10:01:50,815 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2020-10-29 10:01:50,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 10:01:50,824 INFO L225 Difference]: With dead ends: 101 [2020-10-29 10:01:50,824 INFO L226 Difference]: Without dead ends: 50 [2020-10-29 10:01:50,828 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2020-10-29 10:01:50,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-29 10:01:50,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 43. [2020-10-29 10:01:50,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-29 10:01:50,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 55 transitions. [2020-10-29 10:01:50,874 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 55 transitions. Word has length 19 [2020-10-29 10:01:50,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 10:01:50,875 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 55 transitions. [2020-10-29 10:01:50,875 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 10:01:50,875 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 55 transitions. [2020-10-29 10:01:50,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-29 10:01:50,876 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 10:01:50,876 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 10:01:50,877 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-29 10:01:50,877 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 10:01:50,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 10:01:50,878 INFO L82 PathProgramCache]: Analyzing trace with hash 1565068645, now seen corresponding path program 1 times [2020-10-29 10:01:50,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 10:01:50,878 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2147306037] [2020-10-29 10:01:50,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 10:01:50,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 10:01:50,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:01:50,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:01:50,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:01:51,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:01:51,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:01:53,697 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 10:01:53,697 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-29 10:01:53,697 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 10:01:53,698 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2792 [2020-10-29 10:01:53,698 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 10:01:53,698 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 10:01:53,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-29 10:01:53,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 10:01:53,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-29 10:01:53,699 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 10:01:54,054 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 55 [2020-10-29 10:01:54,350 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 35 [2020-10-29 10:01:54,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 10:01:54,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 10:01:54,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:01:54,428 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 10:01:54,428 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 10:01:54,435 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 10:01:54,435 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 10:01:54,435 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 10:01:54,436 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 10:01:54,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 10:01:54,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 10:01:54,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 10:01:54,437 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 10:01:54,459 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 10:01:54,460 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2147306037] [2020-10-29 10:01:54,460 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 10:01:54,460 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-29 10:01:54,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396372524] [2020-10-29 10:01:54,464 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-29 10:01:54,466 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 10:01:54,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-29 10:01:54,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-10-29 10:01:54,479 INFO L87 Difference]: Start difference. First operand 43 states and 55 transitions. Second operand 10 states. [2020-10-29 10:01:54,911 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 80 [2020-10-29 10:01:55,107 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 71 [2020-10-29 10:01:55,435 WARN L193 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 92 [2020-10-29 10:01:55,765 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 81 [2020-10-29 10:01:55,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 10:01:55,882 INFO L93 Difference]: Finished difference Result 122 states and 165 transitions. [2020-10-29 10:01:55,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-29 10:01:55,883 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 27 [2020-10-29 10:01:55,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 10:01:55,885 INFO L225 Difference]: With dead ends: 122 [2020-10-29 10:01:55,885 INFO L226 Difference]: Without dead ends: 87 [2020-10-29 10:01:55,886 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2020-10-29 10:01:55,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-29 10:01:55,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 56. [2020-10-29 10:01:55,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-29 10:01:55,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 74 transitions. [2020-10-29 10:01:55,902 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 74 transitions. Word has length 27 [2020-10-29 10:01:55,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 10:01:55,902 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 74 transitions. [2020-10-29 10:01:55,903 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-29 10:01:55,903 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 74 transitions. [2020-10-29 10:01:55,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-29 10:01:55,908 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 10:01:55,908 INFO L422 BasicCegarLoop]: trace histogram [2, 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 10:01:55,908 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-29 10:01:55,908 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 10:01:55,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 10:01:55,910 INFO L82 PathProgramCache]: Analyzing trace with hash 988656838, now seen corresponding path program 1 times [2020-10-29 10:01:55,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 10:01:55,911 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1448277438] [2020-10-29 10:01:55,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 10:01:55,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 10:01:55,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:01:55,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:01:56,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:01:56,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:01:56,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:02:00,939 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 10:02:00,939 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-29 10:02:00,940 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 10:02:00,940 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-29 10:02:00,940 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 10:02:00,940 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 10:02:00,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-29 10:02:00,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 10:02:00,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-29 10:02:00,942 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 10:02:01,272 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 62 [2020-10-29 10:02:01,435 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 64 [2020-10-29 10:02:01,576 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 63 [2020-10-29 10:02:02,055 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 70 [2020-10-29 10:02:02,109 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 10:02:02,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 10:02:02,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:02:02,119 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 10:02:02,120 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 10:02:02,120 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 10:02:02,120 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 10:02:02,120 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 10:02:02,120 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 10:02:02,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 10:02:02,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 10:02:02,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 10:02:02,121 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 10:02:02,140 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 10:02:02,142 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1448277438] [2020-10-29 10:02:02,142 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 10:02:02,143 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-29 10:02:02,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728499140] [2020-10-29 10:02:02,143 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-29 10:02:02,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 10:02:02,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-29 10:02:02,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-10-29 10:02:02,147 INFO L87 Difference]: Start difference. First operand 56 states and 74 transitions. Second operand 10 states. [2020-10-29 10:02:02,366 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 71 [2020-10-29 10:02:02,665 WARN L193 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 101 [2020-10-29 10:02:02,995 WARN L193 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 95 [2020-10-29 10:02:03,376 WARN L193 SmtUtils]: Spent 340.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 103 [2020-10-29 10:02:03,854 WARN L193 SmtUtils]: Spent 337.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 107 [2020-10-29 10:02:04,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 10:02:04,019 INFO L93 Difference]: Finished difference Result 123 states and 165 transitions. [2020-10-29 10:02:04,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-29 10:02:04,019 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 30 [2020-10-29 10:02:04,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 10:02:04,021 INFO L225 Difference]: With dead ends: 123 [2020-10-29 10:02:04,022 INFO L226 Difference]: Without dead ends: 81 [2020-10-29 10:02:04,023 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2020-10-29 10:02:04,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-29 10:02:04,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 66. [2020-10-29 10:02:04,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-29 10:02:04,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 86 transitions. [2020-10-29 10:02:04,060 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 86 transitions. Word has length 30 [2020-10-29 10:02:04,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 10:02:04,061 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 86 transitions. [2020-10-29 10:02:04,061 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-29 10:02:04,061 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 86 transitions. [2020-10-29 10:02:04,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-29 10:02:04,064 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 10:02:04,064 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 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 10:02:04,068 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-29 10:02:04,068 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 10:02:04,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 10:02:04,071 INFO L82 PathProgramCache]: Analyzing trace with hash 1340192203, now seen corresponding path program 1 times [2020-10-29 10:02:04,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 10:02:04,071 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [333666820] [2020-10-29 10:02:04,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 10:02:04,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 10:02:04,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:02:04,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:02:04,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:02:04,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:02:04,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:02:08,517 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 10:02:08,518 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-29 10:02:08,518 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 10:02:08,518 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4419 [2020-10-29 10:02:08,518 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 10:02:08,518 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 10:02:08,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-29 10:02:08,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 10:02:08,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-29 10:02:08,519 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 10:02:08,770 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 64 [2020-10-29 10:02:08,897 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 68 [2020-10-29 10:02:09,072 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 79 [2020-10-29 10:02:09,236 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 70 [2020-10-29 10:02:09,466 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 81 [2020-10-29 10:02:09,878 WARN L193 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 148 DAG size of output: 74 [2020-10-29 10:02:09,935 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 10:02:09,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 10:02:09,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:02:09,944 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 10:02:09,944 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 10:02:09,945 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 10:02:09,945 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 10:02:09,946 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 10:02:09,946 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 10:02:09,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 10:02:09,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 10:02:09,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 10:02:09,946 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 10:02:09,969 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-29 10:02:09,970 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [333666820] [2020-10-29 10:02:09,971 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 10:02:09,971 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-29 10:02:09,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395419833] [2020-10-29 10:02:09,972 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-29 10:02:09,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 10:02:09,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-29 10:02:09,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-10-29 10:02:09,973 INFO L87 Difference]: Start difference. First operand 66 states and 86 transitions. Second operand 11 states. [2020-10-29 10:02:10,330 WARN L193 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 115 [2020-10-29 10:02:10,508 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2020-10-29 10:02:10,704 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 119 [2020-10-29 10:02:10,894 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 66 [2020-10-29 10:02:11,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 10:02:11,372 INFO L93 Difference]: Finished difference Result 170 states and 227 transitions. [2020-10-29 10:02:11,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-29 10:02:11,373 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 32 [2020-10-29 10:02:11,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 10:02:11,375 INFO L225 Difference]: With dead ends: 170 [2020-10-29 10:02:11,375 INFO L226 Difference]: Without dead ends: 157 [2020-10-29 10:02:11,378 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2020-10-29 10:02:11,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2020-10-29 10:02:11,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 75. [2020-10-29 10:02:11,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-29 10:02:11,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 99 transitions. [2020-10-29 10:02:11,421 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 99 transitions. Word has length 32 [2020-10-29 10:02:11,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 10:02:11,422 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 99 transitions. [2020-10-29 10:02:11,422 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-29 10:02:11,422 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 99 transitions. [2020-10-29 10:02:11,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-29 10:02:11,429 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 10:02:11,430 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 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 10:02:11,430 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-29 10:02:11,430 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 10:02:11,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 10:02:11,431 INFO L82 PathProgramCache]: Analyzing trace with hash 952548845, now seen corresponding path program 2 times [2020-10-29 10:02:11,431 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 10:02:11,431 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [3165174] [2020-10-29 10:02:11,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 10:02:11,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 10:02:11,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:02:11,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:02:11,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:02:11,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:02:12,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:02:16,467 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 10:02:16,467 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-29 10:02:16,467 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 10:02:16,468 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-29 10:02:16,468 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 10:02:16,468 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 10:02:16,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-29 10:02:16,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 10:02:16,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-29 10:02:16,469 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 10:02:16,736 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 61 [2020-10-29 10:02:16,909 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 58 [2020-10-29 10:02:17,132 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 76 [2020-10-29 10:02:17,463 WARN L193 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 175 DAG size of output: 73 [2020-10-29 10:02:18,003 WARN L193 SmtUtils]: Spent 481.00 ms on a formula simplification. DAG size of input: 186 DAG size of output: 85 [2020-10-29 10:02:18,142 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 61 [2020-10-29 10:02:18,597 WARN L193 SmtUtils]: Spent 375.00 ms on a formula simplification. DAG size of input: 172 DAG size of output: 73 [2020-10-29 10:02:18,661 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 10:02:18,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 10:02:18,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:02:18,668 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 10:02:18,668 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 10:02:18,668 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 10:02:18,669 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 10:02:18,669 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 10:02:18,669 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 10:02:18,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 10:02:18,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 10:02:18,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 10:02:18,670 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 10:02:18,692 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-29 10:02:18,693 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [3165174] [2020-10-29 10:02:18,693 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 10:02:18,693 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-29 10:02:18,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517985294] [2020-10-29 10:02:18,694 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-29 10:02:18,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 10:02:18,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-29 10:02:18,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-10-29 10:02:18,695 INFO L87 Difference]: Start difference. First operand 75 states and 99 transitions. Second operand 11 states. [2020-10-29 10:02:18,968 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 76 [2020-10-29 10:02:19,218 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 95 [2020-10-29 10:02:19,494 WARN L193 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 105 [2020-10-29 10:02:19,807 WARN L193 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 97 [2020-10-29 10:02:20,159 WARN L193 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 98 [2020-10-29 10:02:20,579 WARN L193 SmtUtils]: Spent 376.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 108 [2020-10-29 10:02:20,959 WARN L193 SmtUtils]: Spent 312.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 98 [2020-10-29 10:02:21,318 WARN L193 SmtUtils]: Spent 313.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 102 [2020-10-29 10:02:21,581 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 81 [2020-10-29 10:02:21,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 10:02:21,850 INFO L93 Difference]: Finished difference Result 126 states and 166 transitions. [2020-10-29 10:02:21,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-29 10:02:21,850 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 34 [2020-10-29 10:02:21,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 10:02:21,852 INFO L225 Difference]: With dead ends: 126 [2020-10-29 10:02:21,852 INFO L226 Difference]: Without dead ends: 113 [2020-10-29 10:02:21,853 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=103, Invalid=277, Unknown=0, NotChecked=0, Total=380 [2020-10-29 10:02:21,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-29 10:02:21,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 66. [2020-10-29 10:02:21,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-29 10:02:21,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 86 transitions. [2020-10-29 10:02:21,897 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 86 transitions. Word has length 34 [2020-10-29 10:02:21,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 10:02:21,898 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 86 transitions. [2020-10-29 10:02:21,898 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-29 10:02:21,898 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 86 transitions. [2020-10-29 10:02:21,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-29 10:02:21,901 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 10:02:21,901 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 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 10:02:21,901 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-29 10:02:21,901 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 10:02:21,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 10:02:21,902 INFO L82 PathProgramCache]: Analyzing trace with hash -953459122, now seen corresponding path program 1 times [2020-10-29 10:02:21,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 10:02:21,903 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [942171400] [2020-10-29 10:02:21,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 10:02:21,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 10:02:21,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:02:21,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:02:21,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:02:21,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:02:22,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:02:22,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:02:22,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:02:23,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:02:23,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:02:26,935 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 10:02:26,935 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-29 10:02:26,935 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-29 10:02:26,935 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-29 10:02:26,936 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 10:02:26,936 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 10:02:26,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 10:02:26,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-29 10:02:26,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-29 10:02:26,936 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 10:02:27,076 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 10:02:27,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 10:02:27,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:02:27,082 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 10:02:27,082 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 10:02:27,083 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 10:02:27,083 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 10:02:27,083 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 10:02:27,083 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 10:02:27,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 10:02:27,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 10:02:27,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 10:02:27,084 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 10:02:27,090 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-29 10:02:27,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [942171400] [2020-10-29 10:02:27,092 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 10:02:27,092 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-29 10:02:27,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834212709] [2020-10-29 10:02:27,093 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 10:02:27,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 10:02:27,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 10:02:27,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-29 10:02:27,098 INFO L87 Difference]: Start difference. First operand 66 states and 86 transitions. Second operand 8 states. [2020-10-29 10:02:27,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 10:02:27,348 INFO L93 Difference]: Finished difference Result 109 states and 141 transitions. [2020-10-29 10:02:27,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-29 10:02:27,349 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 34 [2020-10-29 10:02:27,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 10:02:27,351 INFO L225 Difference]: With dead ends: 109 [2020-10-29 10:02:27,351 INFO L226 Difference]: Without dead ends: 102 [2020-10-29 10:02:27,351 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-29 10:02:27,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-29 10:02:27,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 57. [2020-10-29 10:02:27,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-29 10:02:27,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 72 transitions. [2020-10-29 10:02:27,380 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 72 transitions. Word has length 34 [2020-10-29 10:02:27,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 10:02:27,382 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 72 transitions. [2020-10-29 10:02:27,382 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 10:02:27,382 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 72 transitions. [2020-10-29 10:02:27,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-29 10:02:27,384 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 10:02:27,384 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 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 10:02:27,384 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-29 10:02:27,385 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 10:02:27,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 10:02:27,385 INFO L82 PathProgramCache]: Analyzing trace with hash 2138631572, now seen corresponding path program 2 times [2020-10-29 10:02:27,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 10:02:27,386 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [941325617] [2020-10-29 10:02:27,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 10:02:27,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 10:02:27,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:02:27,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:02:27,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:02:27,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:02:27,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:02:30,919 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 10:02:30,919 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-29 10:02:30,920 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 10:02:30,920 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3516 [2020-10-29 10:02:30,920 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 10:02:30,920 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 10:02:30,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 10:02:30,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-29 10:02:30,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-29 10:02:30,921 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 10:02:31,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 10:02:31,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 10:02:31,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:02:31,090 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 10:02:31,091 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 10:02:31,091 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 10:02:31,091 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 10:02:31,091 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 10:02:31,091 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 10:02:31,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 10:02:31,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 10:02:31,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 10:02:31,092 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 10:02:31,101 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-29 10:02:31,102 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [941325617] [2020-10-29 10:02:31,102 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 10:02:31,102 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-29 10:02:31,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956932781] [2020-10-29 10:02:31,103 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 10:02:31,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 10:02:31,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 10:02:31,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-29 10:02:31,104 INFO L87 Difference]: Start difference. First operand 57 states and 72 transitions. Second operand 8 states. [2020-10-29 10:02:31,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 10:02:31,382 INFO L93 Difference]: Finished difference Result 82 states and 102 transitions. [2020-10-29 10:02:31,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-29 10:02:31,383 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 34 [2020-10-29 10:02:31,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 10:02:31,384 INFO L225 Difference]: With dead ends: 82 [2020-10-29 10:02:31,384 INFO L226 Difference]: Without dead ends: 55 [2020-10-29 10:02:31,385 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2020-10-29 10:02:31,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-29 10:02:31,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2020-10-29 10:02:31,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-29 10:02:31,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 69 transitions. [2020-10-29 10:02:31,417 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 69 transitions. Word has length 34 [2020-10-29 10:02:31,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 10:02:31,418 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 69 transitions. [2020-10-29 10:02:31,418 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 10:02:31,418 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 69 transitions. [2020-10-29 10:02:31,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-29 10:02:31,419 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 10:02:31,419 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 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 10:02:31,420 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-29 10:02:31,420 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 10:02:31,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 10:02:31,420 INFO L82 PathProgramCache]: Analyzing trace with hash -319612965, now seen corresponding path program 1 times [2020-10-29 10:02:31,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 10:02:31,421 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [48655279] [2020-10-29 10:02:31,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 10:02:31,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 10:02:31,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:02:31,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:02:31,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:02:31,925 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 10:02:31,925 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-29 10:02:31,925 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 10:02:31,925 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 480 [2020-10-29 10:02:31,926 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 10:02:31,926 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 10:02:31,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 10:02:31,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 10:02:31,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-29 10:02:31,926 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 10:02:31,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 10:02:31,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 10:02:31,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:02:31,993 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 10:02:31,993 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 10:02:31,994 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 10:02:31,994 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 10:02:31,994 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 10:02:31,994 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 10:02:31,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 10:02:31,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 10:02:31,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 10:02:31,995 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 10:02:31,998 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-29 10:02:31,999 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [48655279] [2020-10-29 10:02:31,999 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 10:02:31,999 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-29 10:02:31,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882677150] [2020-10-29 10:02:32,000 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 10:02:32,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 10:02:32,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 10:02:32,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-29 10:02:32,001 INFO L87 Difference]: Start difference. First operand 55 states and 69 transitions. Second operand 5 states. [2020-10-29 10:02:32,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 10:02:32,174 INFO L93 Difference]: Finished difference Result 147 states and 194 transitions. [2020-10-29 10:02:32,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 10:02:32,174 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 35 [2020-10-29 10:02:32,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 10:02:32,176 INFO L225 Difference]: With dead ends: 147 [2020-10-29 10:02:32,176 INFO L226 Difference]: Without dead ends: 101 [2020-10-29 10:02:32,176 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-29 10:02:32,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-29 10:02:32,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 57. [2020-10-29 10:02:32,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-29 10:02:32,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 71 transitions. [2020-10-29 10:02:32,196 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 71 transitions. Word has length 35 [2020-10-29 10:02:32,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 10:02:32,196 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 71 transitions. [2020-10-29 10:02:32,196 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 10:02:32,196 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 71 transitions. [2020-10-29 10:02:32,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-29 10:02:32,197 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 10:02:32,197 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 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 10:02:32,197 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-29 10:02:32,197 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 10:02:32,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 10:02:32,198 INFO L82 PathProgramCache]: Analyzing trace with hash 564167801, now seen corresponding path program 2 times [2020-10-29 10:02:32,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 10:02:32,198 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [81781170] [2020-10-29 10:02:32,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 10:02:32,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 10:02:32,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:02:32,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:02:32,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:02:32,998 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 10:02:32,998 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-29 10:02:32,998 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 10:02:32,999 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 785 [2020-10-29 10:02:32,999 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 10:02:32,999 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 10:02:32,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 10:02:32,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-29 10:02:32,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-29 10:02:32,999 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 10:02:33,075 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 10:02:33,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 10:02:33,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:02:33,081 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 10:02:33,081 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 10:02:33,081 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 10:02:33,081 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 10:02:33,081 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 10:02:33,081 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 10:02:33,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 10:02:33,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 10:02:33,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 10:02:33,082 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 10:02:33,085 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-29 10:02:33,085 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [81781170] [2020-10-29 10:02:33,085 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 10:02:33,085 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-29 10:02:33,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512443377] [2020-10-29 10:02:33,086 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 10:02:33,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 10:02:33,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 10:02:33,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-29 10:02:33,090 INFO L87 Difference]: Start difference. First operand 57 states and 71 transitions. Second operand 5 states. [2020-10-29 10:02:33,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 10:02:33,239 INFO L93 Difference]: Finished difference Result 120 states and 162 transitions. [2020-10-29 10:02:33,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 10:02:33,240 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 37 [2020-10-29 10:02:33,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 10:02:33,242 INFO L225 Difference]: With dead ends: 120 [2020-10-29 10:02:33,242 INFO L226 Difference]: Without dead ends: 87 [2020-10-29 10:02:33,243 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-29 10:02:33,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-29 10:02:33,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 77. [2020-10-29 10:02:33,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-29 10:02:33,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 95 transitions. [2020-10-29 10:02:33,275 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 95 transitions. Word has length 37 [2020-10-29 10:02:33,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 10:02:33,275 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 95 transitions. [2020-10-29 10:02:33,275 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 10:02:33,275 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 95 transitions. [2020-10-29 10:02:33,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-29 10:02:33,276 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 10:02:33,276 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 10:02:33,276 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-29 10:02:33,277 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 10:02:33,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 10:02:33,277 INFO L82 PathProgramCache]: Analyzing trace with hash -291710807, now seen corresponding path program 1 times [2020-10-29 10:02:33,278 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 10:02:33,278 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [668105750] [2020-10-29 10:02:33,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 10:02:33,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 10:02:33,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:02:33,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:02:33,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:02:33,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:02:33,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:02:33,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:02:33,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:02:34,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:02:34,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:02:36,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:02:36,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:02:38,312 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 10:02:38,312 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-29 10:02:38,312 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-29 10:02:38,313 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-29 10:02:38,313 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 10:02:38,313 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 10:02:38,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-29 10:02:38,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 10:02:38,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-29 10:02:38,314 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 10:02:38,871 WARN L193 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 44 [2020-10-29 10:02:39,105 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 27 [2020-10-29 10:02:39,321 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 33 [2020-10-29 10:02:39,378 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 10:02:39,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 10:02:39,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:02:39,385 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 10:02:39,385 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 10:02:39,385 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 10:02:39,385 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 10:02:39,385 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 10:02:39,386 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 10:02:39,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 10:02:39,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 10:02:39,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 10:02:39,386 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 10:02:39,402 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-29 10:02:39,403 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [668105750] [2020-10-29 10:02:39,403 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 10:02:39,403 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-29 10:02:39,403 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025773206] [2020-10-29 10:02:39,404 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-29 10:02:39,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 10:02:39,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-29 10:02:39,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2020-10-29 10:02:39,405 INFO L87 Difference]: Start difference. First operand 77 states and 95 transitions. Second operand 13 states. [2020-10-29 10:02:39,916 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 50 [2020-10-29 10:02:40,723 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 54 [2020-10-29 10:02:40,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 10:02:40,931 INFO L93 Difference]: Finished difference Result 190 states and 244 transitions. [2020-10-29 10:02:40,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-29 10:02:40,932 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 46 [2020-10-29 10:02:40,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 10:02:40,934 INFO L225 Difference]: With dead ends: 190 [2020-10-29 10:02:40,935 INFO L226 Difference]: Without dead ends: 173 [2020-10-29 10:02:40,935 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=106, Invalid=356, Unknown=0, NotChecked=0, Total=462 [2020-10-29 10:02:40,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-10-29 10:02:40,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 115. [2020-10-29 10:02:40,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-10-29 10:02:40,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 149 transitions. [2020-10-29 10:02:40,972 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 149 transitions. Word has length 46 [2020-10-29 10:02:40,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 10:02:40,972 INFO L481 AbstractCegarLoop]: Abstraction has 115 states and 149 transitions. [2020-10-29 10:02:40,972 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-29 10:02:40,972 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 149 transitions. [2020-10-29 10:02:40,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-29 10:02:40,973 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 10:02:40,973 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 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 10:02:40,974 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-29 10:02:40,974 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 10:02:40,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 10:02:40,974 INFO L82 PathProgramCache]: Analyzing trace with hash -1571574485, now seen corresponding path program 1 times [2020-10-29 10:02:40,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 10:02:40,975 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [648558296] [2020-10-29 10:02:40,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 10:02:40,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 10:02:41,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:02:41,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:02:41,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:02:41,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:02:41,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:02:41,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:02:45,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:02:45,992 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 10:02:45,992 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-29 10:02:45,992 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-29 10:02:45,992 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-29 10:02:45,992 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 10:02:45,992 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 10:02:45,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-29 10:02:45,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-29 10:02:45,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-29 10:02:45,993 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 10:02:46,342 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 39 [2020-10-29 10:02:46,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 10:02:46,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 10:02:46,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:02:46,409 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 10:02:46,409 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 10:02:46,409 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 10:02:46,409 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 10:02:46,409 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 10:02:46,409 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 10:02:46,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 10:02:46,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 10:02:46,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 10:02:46,410 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 10:02:46,416 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-29 10:02:46,416 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [648558296] [2020-10-29 10:02:46,416 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 10:02:46,416 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-29 10:02:46,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313454785] [2020-10-29 10:02:46,417 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-29 10:02:46,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 10:02:46,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-29 10:02:46,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-29 10:02:46,418 INFO L87 Difference]: Start difference. First operand 115 states and 149 transitions. Second operand 10 states. [2020-10-29 10:02:47,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 10:02:47,044 INFO L93 Difference]: Finished difference Result 251 states and 334 transitions. [2020-10-29 10:02:47,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-29 10:02:47,045 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 46 [2020-10-29 10:02:47,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 10:02:47,046 INFO L225 Difference]: With dead ends: 251 [2020-10-29 10:02:47,046 INFO L226 Difference]: Without dead ends: 216 [2020-10-29 10:02:47,047 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-10-29 10:02:47,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-10-29 10:02:47,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 143. [2020-10-29 10:02:47,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-29 10:02:47,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 187 transitions. [2020-10-29 10:02:47,092 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 187 transitions. Word has length 46 [2020-10-29 10:02:47,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 10:02:47,092 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 187 transitions. [2020-10-29 10:02:47,092 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-29 10:02:47,092 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 187 transitions. [2020-10-29 10:02:47,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-29 10:02:47,093 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 10:02:47,093 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 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 10:02:47,093 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-29 10:02:47,093 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 10:02:47,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 10:02:47,094 INFO L82 PathProgramCache]: Analyzing trace with hash -425724313, now seen corresponding path program 1 times [2020-10-29 10:02:47,094 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 10:02:47,094 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1510023286] [2020-10-29 10:02:47,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 10:02:47,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 10:02:47,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:02:47,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:02:47,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:02:47,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:02:47,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:02:47,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:02:48,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:02:48,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:02:49,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:02:49,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:02:49,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:02:49,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:02:50,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:02:50,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:02:50,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:02:50,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:02:51,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:02:52,114 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 10:02:52,114 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-29 10:02:52,114 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 17 [2020-10-29 10:02:52,114 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-29 10:02:52,114 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 10:02:52,114 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 10:02:52,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-29 10:02:52,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 10:02:52,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-29 10:02:52,115 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 10:02:52,336 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 59 [2020-10-29 10:02:53,491 WARN L193 SmtUtils]: Spent 980.00 ms on a formula simplification. DAG size of input: 349 DAG size of output: 141 [2020-10-29 10:02:55,121 WARN L193 SmtUtils]: Spent 1.56 s on a formula simplification. DAG size of input: 378 DAG size of output: 169 [2020-10-29 10:02:56,905 WARN L193 SmtUtils]: Spent 1.70 s on a formula simplification. DAG size of input: 402 DAG size of output: 104 [2020-10-29 10:02:56,976 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 10:02:56,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 10:02:56,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:02:56,982 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 10:02:56,983 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 10:02:56,983 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 10:02:56,983 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 10:02:56,983 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 10:02:56,983 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 10:02:56,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 10:02:56,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 10:02:56,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 10:02:56,984 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 10:02:57,032 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-29 10:02:57,033 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1510023286] [2020-10-29 10:02:57,033 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 10:02:57,033 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-29 10:02:57,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374150235] [2020-10-29 10:02:57,034 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 10:02:57,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 10:02:57,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 10:02:57,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-29 10:02:57,035 INFO L87 Difference]: Start difference. First operand 143 states and 187 transitions. Second operand 9 states. [2020-10-29 10:02:57,909 WARN L193 SmtUtils]: Spent 577.00 ms on a formula simplification. DAG size of input: 162 DAG size of output: 152 [2020-10-29 10:02:58,682 WARN L193 SmtUtils]: Spent 619.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 118 [2020-10-29 10:02:59,565 WARN L193 SmtUtils]: Spent 802.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 181 [2020-10-29 10:03:00,554 WARN L193 SmtUtils]: Spent 912.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 180 [2020-10-29 10:03:00,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 10:03:00,693 INFO L93 Difference]: Finished difference Result 166 states and 215 transitions. [2020-10-29 10:03:00,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-29 10:03:00,694 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 46 [2020-10-29 10:03:00,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 10:03:00,696 INFO L225 Difference]: With dead ends: 166 [2020-10-29 10:03:00,696 INFO L226 Difference]: Without dead ends: 149 [2020-10-29 10:03:00,697 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-10-29 10:03:00,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-10-29 10:03:00,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 148. [2020-10-29 10:03:00,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-10-29 10:03:00,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 193 transitions. [2020-10-29 10:03:00,743 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 193 transitions. Word has length 46 [2020-10-29 10:03:00,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 10:03:00,744 INFO L481 AbstractCegarLoop]: Abstraction has 148 states and 193 transitions. [2020-10-29 10:03:00,744 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 10:03:00,744 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 193 transitions. [2020-10-29 10:03:00,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-29 10:03:00,744 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 10:03:00,745 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 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 10:03:00,745 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-29 10:03:00,745 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 10:03:00,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 10:03:00,745 INFO L82 PathProgramCache]: Analyzing trace with hash -167558875, now seen corresponding path program 1 times [2020-10-29 10:03:00,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 10:03:00,746 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [965795222] [2020-10-29 10:03:00,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 10:03:00,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 10:03:00,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:03:00,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:03:00,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:03:00,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:03:00,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:03:02,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:03:03,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:03:05,768 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 10:03:05,768 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-29 10:03:05,768 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-29 10:03:05,768 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-29 10:03:05,769 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 10:03:05,769 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 10:03:05,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 10:03:05,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-29 10:03:05,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-29 10:03:05,769 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 10:03:05,919 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 10:03:05,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 10:03:05,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:03:05,925 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 10:03:05,925 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 10:03:05,925 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 10:03:05,925 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 10:03:05,925 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 10:03:05,925 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 10:03:05,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 10:03:05,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 10:03:05,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 10:03:05,926 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 10:03:05,933 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-29 10:03:05,934 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [965795222] [2020-10-29 10:03:05,934 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 10:03:05,934 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-29 10:03:05,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96703444] [2020-10-29 10:03:05,935 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 10:03:05,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 10:03:05,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 10:03:05,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-29 10:03:05,936 INFO L87 Difference]: Start difference. First operand 148 states and 193 transitions. Second operand 9 states. [2020-10-29 10:03:06,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 10:03:06,427 INFO L93 Difference]: Finished difference Result 273 states and 357 transitions. [2020-10-29 10:03:06,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-29 10:03:06,428 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 46 [2020-10-29 10:03:06,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 10:03:06,430 INFO L225 Difference]: With dead ends: 273 [2020-10-29 10:03:06,430 INFO L226 Difference]: Without dead ends: 266 [2020-10-29 10:03:06,431 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2020-10-29 10:03:06,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2020-10-29 10:03:06,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 223. [2020-10-29 10:03:06,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 223 states. [2020-10-29 10:03:06,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 294 transitions. [2020-10-29 10:03:06,500 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 294 transitions. Word has length 46 [2020-10-29 10:03:06,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 10:03:06,500 INFO L481 AbstractCegarLoop]: Abstraction has 223 states and 294 transitions. [2020-10-29 10:03:06,500 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 10:03:06,500 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 294 transitions. [2020-10-29 10:03:06,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-29 10:03:06,501 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 10:03:06,501 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 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 10:03:06,501 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-29 10:03:06,502 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 10:03:06,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 10:03:06,502 INFO L82 PathProgramCache]: Analyzing trace with hash 609818987, now seen corresponding path program 1 times [2020-10-29 10:03:06,502 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 10:03:06,502 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1358188931] [2020-10-29 10:03:06,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 10:03:06,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 10:03:06,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:03:06,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:03:06,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:03:06,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:03:06,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:03:11,517 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 10:03:11,517 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-29 10:03:11,518 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 10:03:11,518 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-29 10:03:11,518 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 10:03:11,518 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 10:03:11,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-29 10:03:11,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-29 10:03:11,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-29 10:03:11,518 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 10:03:12,127 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 52 [2020-10-29 10:03:12,198 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 10:03:12,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 10:03:12,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:03:12,205 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 10:03:12,205 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 10:03:12,205 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 10:03:12,205 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 10:03:12,205 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 10:03:12,206 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 10:03:12,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 10:03:12,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 10:03:12,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 10:03:12,208 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-29 10:03:12,218 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-29 10:03:12,218 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1358188931] [2020-10-29 10:03:12,218 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 10:03:12,218 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-29 10:03:12,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686092319] [2020-10-29 10:03:12,219 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-29 10:03:12,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 10:03:12,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-29 10:03:12,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-10-29 10:03:12,220 INFO L87 Difference]: Start difference. First operand 223 states and 294 transitions. Second operand 12 states. [2020-10-29 10:03:13,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 10:03:13,316 INFO L93 Difference]: Finished difference Result 520 states and 688 transitions. [2020-10-29 10:03:13,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-29 10:03:13,316 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 46 [2020-10-29 10:03:13,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 10:03:13,319 INFO L225 Difference]: With dead ends: 520 [2020-10-29 10:03:13,319 INFO L226 Difference]: Without dead ends: 448 [2020-10-29 10:03:13,320 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-10-29 10:03:13,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 448 states. [2020-10-29 10:03:13,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 448 to 266. [2020-10-29 10:03:13,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 266 states. [2020-10-29 10:03:13,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 347 transitions. [2020-10-29 10:03:13,416 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 347 transitions. Word has length 46 [2020-10-29 10:03:13,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 10:03:13,417 INFO L481 AbstractCegarLoop]: Abstraction has 266 states and 347 transitions. [2020-10-29 10:03:13,417 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-29 10:03:13,417 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 347 transitions. [2020-10-29 10:03:13,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-29 10:03:13,418 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 10:03:13,418 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 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 10:03:13,418 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-29 10:03:13,418 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 10:03:13,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 10:03:13,419 INFO L82 PathProgramCache]: Analyzing trace with hash 1755669159, now seen corresponding path program 1 times [2020-10-29 10:03:13,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 10:03:13,419 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1207999060] [2020-10-29 10:03:13,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 10:03:13,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 10:03:13,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:03:13,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:03:13,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:03:13,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:03:13,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:03:18,435 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 10:03:18,435 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-29 10:03:18,435 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 10:03:18,435 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-29 10:03:18,435 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 10:03:18,435 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 10:03:18,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-29 10:03:18,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-29 10:03:18,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-29 10:03:18,436 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 10:03:18,778 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 33 [2020-10-29 10:03:18,830 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 10:03:18,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 10:03:18,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:03:18,836 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 10:03:18,836 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 10:03:18,836 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 10:03:18,836 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 10:03:18,836 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 10:03:18,837 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 10:03:18,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 10:03:18,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 10:03:18,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 10:03:18,837 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 10:03:18,842 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-29 10:03:18,842 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1207999060] [2020-10-29 10:03:18,843 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 10:03:18,843 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-29 10:03:18,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890111153] [2020-10-29 10:03:18,843 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-29 10:03:18,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 10:03:18,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-29 10:03:18,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-10-29 10:03:18,844 INFO L87 Difference]: Start difference. First operand 266 states and 347 transitions. Second operand 10 states. [2020-10-29 10:03:19,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 10:03:19,467 INFO L93 Difference]: Finished difference Result 426 states and 562 transitions. [2020-10-29 10:03:19,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-29 10:03:19,467 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 46 [2020-10-29 10:03:19,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 10:03:19,470 INFO L225 Difference]: With dead ends: 426 [2020-10-29 10:03:19,470 INFO L226 Difference]: Without dead ends: 391 [2020-10-29 10:03:19,471 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2020-10-29 10:03:19,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2020-10-29 10:03:19,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 213. [2020-10-29 10:03:19,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 213 states. [2020-10-29 10:03:19,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 270 transitions. [2020-10-29 10:03:19,549 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 270 transitions. Word has length 46 [2020-10-29 10:03:19,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 10:03:19,549 INFO L481 AbstractCegarLoop]: Abstraction has 213 states and 270 transitions. [2020-10-29 10:03:19,550 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-29 10:03:19,550 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 270 transitions. [2020-10-29 10:03:19,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-29 10:03:19,551 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 10:03:19,551 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 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 10:03:19,551 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-29 10:03:19,551 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 10:03:19,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 10:03:19,552 INFO L82 PathProgramCache]: Analyzing trace with hash 217640043, now seen corresponding path program 2 times [2020-10-29 10:03:19,552 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 10:03:19,552 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1683061988] [2020-10-29 10:03:19,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 10:03:19,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 10:03:19,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:03:19,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:03:19,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:03:19,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:03:19,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:03:24,576 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 10:03:24,576 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-29 10:03:24,576 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 10:03:24,576 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-29 10:03:24,576 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 10:03:24,576 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 10:03:24,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-29 10:03:24,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-29 10:03:24,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-29 10:03:24,577 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 10:03:25,130 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 41 [2020-10-29 10:03:25,400 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 61 [2020-10-29 10:03:25,465 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 10:03:25,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 10:03:25,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:03:25,470 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 10:03:25,471 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 10:03:25,471 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 10:03:25,471 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 10:03:25,471 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 10:03:25,471 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 10:03:25,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 10:03:25,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 10:03:25,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 10:03:25,472 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 10:03:25,485 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-29 10:03:25,485 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1683061988] [2020-10-29 10:03:25,486 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 10:03:25,486 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-29 10:03:25,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531418262] [2020-10-29 10:03:25,487 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-29 10:03:25,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 10:03:25,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-29 10:03:25,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-10-29 10:03:25,488 INFO L87 Difference]: Start difference. First operand 213 states and 270 transitions. Second operand 12 states. [2020-10-29 10:03:25,937 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 29 [2020-10-29 10:03:26,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 10:03:26,738 INFO L93 Difference]: Finished difference Result 370 states and 478 transitions. [2020-10-29 10:03:26,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-29 10:03:26,739 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 46 [2020-10-29 10:03:26,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 10:03:26,741 INFO L225 Difference]: With dead ends: 370 [2020-10-29 10:03:26,741 INFO L226 Difference]: Without dead ends: 335 [2020-10-29 10:03:26,742 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-10-29 10:03:26,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2020-10-29 10:03:26,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 216. [2020-10-29 10:03:26,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2020-10-29 10:03:26,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 273 transitions. [2020-10-29 10:03:26,822 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 273 transitions. Word has length 46 [2020-10-29 10:03:26,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 10:03:26,823 INFO L481 AbstractCegarLoop]: Abstraction has 216 states and 273 transitions. [2020-10-29 10:03:26,823 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-29 10:03:26,823 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 273 transitions. [2020-10-29 10:03:26,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-29 10:03:26,824 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 10:03:26,824 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 10:03:26,824 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-29 10:03:26,824 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 10:03:26,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 10:03:26,825 INFO L82 PathProgramCache]: Analyzing trace with hash 361102277, now seen corresponding path program 1 times [2020-10-29 10:03:26,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 10:03:26,825 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [935179804] [2020-10-29 10:03:26,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 10:03:26,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 10:03:26,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:03:26,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:03:26,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:03:26,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:03:26,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:03:27,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:03:28,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:03:31,847 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 10:03:31,847 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-29 10:03:31,847 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-29 10:03:31,848 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-29 10:03:31,848 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 10:03:31,848 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 10:03:31,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-29 10:03:31,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-29 10:03:31,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-29 10:03:31,848 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 10:03:32,111 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 10:03:32,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 10:03:32,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:03:32,119 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 10:03:32,119 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 10:03:32,119 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 10:03:32,119 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 10:03:32,120 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 10:03:32,120 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 10:03:32,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 10:03:32,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 10:03:32,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 10:03:32,120 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 10:03:32,128 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 22 proven. 4 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-10-29 10:03:32,129 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [935179804] [2020-10-29 10:03:32,129 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 10:03:32,129 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-29 10:03:32,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835904234] [2020-10-29 10:03:32,130 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-29 10:03:32,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 10:03:32,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-29 10:03:32,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-29 10:03:32,140 INFO L87 Difference]: Start difference. First operand 216 states and 273 transitions. Second operand 10 states. [2020-10-29 10:03:32,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 10:03:32,797 INFO L93 Difference]: Finished difference Result 497 states and 640 transitions. [2020-10-29 10:03:32,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-29 10:03:32,800 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 47 [2020-10-29 10:03:32,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 10:03:32,803 INFO L225 Difference]: With dead ends: 497 [2020-10-29 10:03:32,803 INFO L226 Difference]: Without dead ends: 437 [2020-10-29 10:03:32,805 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2020-10-29 10:03:32,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 437 states. [2020-10-29 10:03:32,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 437 to 326. [2020-10-29 10:03:32,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 326 states. [2020-10-29 10:03:32,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 409 transitions. [2020-10-29 10:03:32,935 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 409 transitions. Word has length 47 [2020-10-29 10:03:32,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 10:03:32,935 INFO L481 AbstractCegarLoop]: Abstraction has 326 states and 409 transitions. [2020-10-29 10:03:32,935 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-29 10:03:32,935 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 409 transitions. [2020-10-29 10:03:32,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-29 10:03:32,937 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 10:03:32,937 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 10:03:32,937 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-29 10:03:32,937 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 10:03:32,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 10:03:32,938 INFO L82 PathProgramCache]: Analyzing trace with hash -1483349856, now seen corresponding path program 2 times [2020-10-29 10:03:32,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 10:03:32,938 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2069893267] [2020-10-29 10:03:32,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 10:03:32,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 10:03:32,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:03:32,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:03:33,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:03:33,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:03:33,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:03:33,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:03:37,957 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 10:03:37,957 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-29 10:03:37,957 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 10:03:37,957 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-29 10:03:37,957 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 10:03:37,957 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 10:03:37,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 10:03:37,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-29 10:03:37,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-29 10:03:37,958 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 10:03:38,045 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 10:03:38,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 10:03:38,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:03:38,049 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 10:03:38,050 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 10:03:38,050 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 10:03:38,050 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 10:03:38,050 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 10:03:38,050 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 10:03:38,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 10:03:38,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 10:03:38,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 10:03:38,050 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 10:03:38,054 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 21 proven. 5 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-29 10:03:38,054 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2069893267] [2020-10-29 10:03:38,054 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 10:03:38,054 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-29 10:03:38,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661837719] [2020-10-29 10:03:38,055 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 10:03:38,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 10:03:38,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 10:03:38,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-29 10:03:38,056 INFO L87 Difference]: Start difference. First operand 326 states and 409 transitions. Second operand 6 states. [2020-10-29 10:03:38,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 10:03:38,377 INFO L93 Difference]: Finished difference Result 731 states and 946 transitions. [2020-10-29 10:03:38,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-29 10:03:38,378 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 49 [2020-10-29 10:03:38,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 10:03:38,381 INFO L225 Difference]: With dead ends: 731 [2020-10-29 10:03:38,382 INFO L226 Difference]: Without dead ends: 450 [2020-10-29 10:03:38,383 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-29 10:03:38,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2020-10-29 10:03:38,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 391. [2020-10-29 10:03:38,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 391 states. [2020-10-29 10:03:38,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 489 transitions. [2020-10-29 10:03:38,525 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 489 transitions. Word has length 49 [2020-10-29 10:03:38,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 10:03:38,526 INFO L481 AbstractCegarLoop]: Abstraction has 391 states and 489 transitions. [2020-10-29 10:03:38,526 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 10:03:38,526 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 489 transitions. [2020-10-29 10:03:38,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-29 10:03:38,528 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 10:03:38,528 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 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 10:03:38,528 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-29 10:03:38,528 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 10:03:38,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 10:03:38,529 INFO L82 PathProgramCache]: Analyzing trace with hash -1302581612, now seen corresponding path program 2 times [2020-10-29 10:03:38,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 10:03:38,529 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2106202331] [2020-10-29 10:03:38,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 10:03:38,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 10:03:38,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:03:38,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:03:38,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:03:38,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:03:38,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:03:38,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:03:38,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:03:39,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:03:39,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:03:41,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:03:41,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:03:42,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:03:42,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:03:43,546 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 10:03:43,547 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-29 10:03:43,547 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-29 10:03:43,547 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-29 10:03:43,547 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 10:03:43,547 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 10:03:43,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-29 10:03:43,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 10:03:43,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-29 10:03:43,547 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 10:03:43,994 WARN L193 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 61 [2020-10-29 10:03:45,004 WARN L193 SmtUtils]: Spent 757.00 ms on a formula simplification. DAG size of input: 306 DAG size of output: 111 [2020-10-29 10:03:46,020 WARN L193 SmtUtils]: Spent 927.00 ms on a formula simplification. DAG size of input: 323 DAG size of output: 128 [2020-10-29 10:03:49,134 WARN L193 SmtUtils]: Spent 3.06 s on a formula simplification. DAG size of input: 153 DAG size of output: 146 [2020-10-29 10:03:50,294 WARN L193 SmtUtils]: Spent 1.06 s on a formula simplification. DAG size of input: 279 DAG size of output: 70 [2020-10-29 10:03:50,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 10:03:50,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 10:03:50,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:03:50,394 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 10:03:50,394 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 10:03:50,394 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 10:03:50,394 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 10:03:50,395 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 10:03:50,395 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 10:03:50,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 10:03:50,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 10:03:50,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 10:03:50,395 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 10:03:50,422 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-29 10:03:50,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2106202331] [2020-10-29 10:03:50,423 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 10:03:50,423 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-29 10:03:50,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324661886] [2020-10-29 10:03:50,424 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-29 10:03:50,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 10:03:50,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-29 10:03:50,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-10-29 10:03:50,425 INFO L87 Difference]: Start difference. First operand 391 states and 489 transitions. Second operand 11 states. [2020-10-29 10:03:51,208 WARN L193 SmtUtils]: Spent 484.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 130 [2020-10-29 10:03:52,013 WARN L193 SmtUtils]: Spent 650.00 ms on a formula simplification. DAG size of input: 148 DAG size of output: 147 [2020-10-29 10:03:56,189 WARN L193 SmtUtils]: Spent 4.02 s on a formula simplification. DAG size of input: 168 DAG size of output: 167 [2020-10-29 10:04:01,243 WARN L193 SmtUtils]: Spent 2.83 s on a formula simplification. DAG size of input: 230 DAG size of output: 220 [2020-10-29 10:04:01,847 WARN L193 SmtUtils]: Spent 408.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 83 [2020-10-29 10:04:02,888 WARN L193 SmtUtils]: Spent 953.00 ms on a formula simplification. DAG size of input: 168 DAG size of output: 127 [2020-10-29 10:04:27,367 WARN L193 SmtUtils]: Spent 24.21 s on a formula simplification. DAG size of input: 210 DAG size of output: 181 [2020-10-29 10:04:37,553 WARN L193 SmtUtils]: Spent 7.89 s on a formula simplification. DAG size of input: 209 DAG size of output: 164 [2020-10-29 10:04:45,872 WARN L193 SmtUtils]: Spent 7.93 s on a formula simplification. DAG size of input: 267 DAG size of output: 206 [2020-10-29 10:04:48,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 10:04:48,791 INFO L93 Difference]: Finished difference Result 720 states and 914 transitions. [2020-10-29 10:04:48,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-29 10:04:48,793 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 52 [2020-10-29 10:04:48,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 10:04:48,796 INFO L225 Difference]: With dead ends: 720 [2020-10-29 10:04:48,796 INFO L226 Difference]: Without dead ends: 568 [2020-10-29 10:04:48,797 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 59.0s TimeCoverageRelationStatistics Valid=89, Invalid=290, Unknown=1, NotChecked=0, Total=380 [2020-10-29 10:04:48,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 568 states. [2020-10-29 10:04:49,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 568 to 542. [2020-10-29 10:04:49,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 542 states. [2020-10-29 10:04:49,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 542 states to 542 states and 681 transitions. [2020-10-29 10:04:49,041 INFO L78 Accepts]: Start accepts. Automaton has 542 states and 681 transitions. Word has length 52 [2020-10-29 10:04:49,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 10:04:49,042 INFO L481 AbstractCegarLoop]: Abstraction has 542 states and 681 transitions. [2020-10-29 10:04:49,042 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-29 10:04:49,042 INFO L276 IsEmpty]: Start isEmpty. Operand 542 states and 681 transitions. [2020-10-29 10:04:49,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-29 10:04:49,044 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 10:04:49,044 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 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 10:04:49,044 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-29 10:04:49,044 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 10:04:49,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 10:04:49,045 INFO L82 PathProgramCache]: Analyzing trace with hash 620646422, now seen corresponding path program 3 times [2020-10-29 10:04:49,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 10:04:49,045 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [627699209] [2020-10-29 10:04:49,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 10:04:49,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 10:04:49,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:04:49,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:04:49,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:04:49,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:04:49,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:04:49,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:04:49,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:04:51,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:04:51,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:04:51,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:04:52,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:04:52,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:04:54,073 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 10:04:54,074 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-29 10:04:54,074 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-29 10:04:54,074 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-29 10:04:54,074 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 10:04:54,074 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 10:04:54,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-29 10:04:54,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 10:04:54,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-29 10:04:54,074 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 10:04:55,495 WARN L193 SmtUtils]: Spent 1.02 s on a formula simplification. DAG size of input: 338 DAG size of output: 126 [2020-10-29 10:04:57,079 WARN L193 SmtUtils]: Spent 1.49 s on a formula simplification. DAG size of input: 363 DAG size of output: 151 [2020-10-29 10:05:07,238 WARN L193 SmtUtils]: Spent 10.02 s on a formula simplification. DAG size of input: 208 DAG size of output: 203 [2020-10-29 10:05:08,362 WARN L193 SmtUtils]: Spent 1.01 s on a formula simplification. DAG size of input: 324 DAG size of output: 54 [2020-10-29 10:05:08,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 10:05:08,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 10:05:08,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:05:08,474 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 10:05:08,474 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 10:05:08,474 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 10:05:08,474 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 10:05:08,474 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 10:05:08,474 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 10:05:08,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 10:05:08,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 10:05:08,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 10:05:08,475 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 10:05:08,523 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-10-29 10:05:08,524 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [627699209] [2020-10-29 10:05:08,524 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 10:05:08,524 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-29 10:05:08,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925928649] [2020-10-29 10:05:08,525 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-29 10:05:08,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 10:05:08,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-29 10:05:08,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-29 10:05:08,526 INFO L87 Difference]: Start difference. First operand 542 states and 681 transitions. Second operand 10 states. [2020-10-29 10:05:09,527 WARN L193 SmtUtils]: Spent 584.00 ms on a formula simplification. DAG size of input: 142 DAG size of output: 138 [2020-10-29 10:05:10,002 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 88 [2020-10-29 10:05:10,964 WARN L193 SmtUtils]: Spent 796.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 163 [2020-10-29 10:05:18,891 WARN L193 SmtUtils]: Spent 7.83 s on a formula simplification. DAG size of input: 224 DAG size of output: 224 [2020-10-29 10:05:26,368 WARN L193 SmtUtils]: Spent 7.26 s on a formula simplification. DAG size of input: 295 DAG size of output: 285 [2020-10-29 10:05:27,706 WARN L193 SmtUtils]: Spent 627.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 137