/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/array-tiling/revcpyswp2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-29 04:11:01,312 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-29 04:11:01,316 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-29 04:11:01,370 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-29 04:11:01,371 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-29 04:11:01,378 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-29 04:11:01,380 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-29 04:11:01,385 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-29 04:11:01,388 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-29 04:11:01,394 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-29 04:11:01,395 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-29 04:11:01,397 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-29 04:11:01,397 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-29 04:11:01,400 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-29 04:11:01,402 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-29 04:11:01,404 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-29 04:11:01,405 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-29 04:11:01,409 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-29 04:11:01,424 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-29 04:11:01,431 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-29 04:11:01,435 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-29 04:11:01,437 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-29 04:11:01,439 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-29 04:11:01,441 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-29 04:11:01,451 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-29 04:11:01,452 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-29 04:11:01,453 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-29 04:11:01,454 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-29 04:11:01,455 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-29 04:11:01,457 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-29 04:11:01,457 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-29 04:11:01,458 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-29 04:11:01,460 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-29 04:11:01,461 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-29 04:11:01,462 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-29 04:11:01,462 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-29 04:11:01,463 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-29 04:11:01,463 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-29 04:11:01,464 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-29 04:11:01,464 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-29 04:11:01,465 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-29 04:11:01,473 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 04:11:01,521 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-29 04:11:01,521 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-29 04:11:01,526 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-29 04:11:01,526 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-29 04:11:01,526 INFO L138 SettingsManager]: * Use SBE=true [2020-10-29 04:11:01,527 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-29 04:11:01,527 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-29 04:11:01,527 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-29 04:11:01,527 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-29 04:11:01,527 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-29 04:11:01,528 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-29 04:11:01,529 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-29 04:11:01,529 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-29 04:11:01,529 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-29 04:11:01,529 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-29 04:11:01,529 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-29 04:11:01,530 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-29 04:11:01,530 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-29 04:11:01,530 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-29 04:11:01,530 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-29 04:11:01,530 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-29 04:11:01,531 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 04:11:01,531 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-29 04:11:01,531 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-29 04:11:01,531 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-29 04:11:01,531 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-29 04:11:01,532 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-29 04:11:01,532 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-29 04:11:01,532 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-29 04:11:01,532 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true;unknown-allowed=true; [2020-10-29 04:11:01,939 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-29 04:11:01,984 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-29 04:11:01,987 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-29 04:11:01,989 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-29 04:11:01,989 INFO L275 PluginConnector]: CDTParser initialized [2020-10-29 04:11:01,990 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-tiling/revcpyswp2.c [2020-10-29 04:11:02,060 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/427fda402/2b3a8e8a52774ceb99c9adf4a71d6ee3/FLAGa9181c40e [2020-10-29 04:11:02,732 INFO L306 CDTParser]: Found 1 translation units. [2020-10-29 04:11:02,733 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-tiling/revcpyswp2.c [2020-10-29 04:11:02,744 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/427fda402/2b3a8e8a52774ceb99c9adf4a71d6ee3/FLAGa9181c40e [2020-10-29 04:11:03,074 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/427fda402/2b3a8e8a52774ceb99c9adf4a71d6ee3 [2020-10-29 04:11:03,080 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-29 04:11:03,087 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-29 04:11:03,091 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-29 04:11:03,091 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-29 04:11:03,095 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-29 04:11:03,096 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 04:11:03" (1/1) ... [2020-10-29 04:11:03,101 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@592d24b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 04:11:03, skipping insertion in model container [2020-10-29 04:11:03,101 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 04:11:03" (1/1) ... [2020-10-29 04:11:03,111 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-29 04:11:03,134 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-29 04:11:03,320 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 04:11:03,344 INFO L203 MainTranslator]: Completed pre-run [2020-10-29 04:11:03,398 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 04:11:03,418 INFO L208 MainTranslator]: Completed translation [2020-10-29 04:11:03,419 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 04:11:03 WrapperNode [2020-10-29 04:11:03,419 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-29 04:11:03,420 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-29 04:11:03,420 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-29 04:11:03,421 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-29 04:11:03,437 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 04:11:03" (1/1) ... [2020-10-29 04:11:03,437 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 04:11:03" (1/1) ... [2020-10-29 04:11:03,448 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 04:11:03" (1/1) ... [2020-10-29 04:11:03,448 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 04:11:03" (1/1) ... [2020-10-29 04:11:03,460 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 04:11:03" (1/1) ... [2020-10-29 04:11:03,466 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 04:11:03" (1/1) ... [2020-10-29 04:11:03,468 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 04:11:03" (1/1) ... [2020-10-29 04:11:03,471 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-29 04:11:03,472 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-29 04:11:03,473 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-29 04:11:03,473 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-29 04:11:03,474 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 04:11:03" (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 04:11:03,569 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-29 04:11:03,570 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-29 04:11:03,570 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-29 04:11:03,570 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-29 04:11:03,571 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-29 04:11:03,571 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-29 04:11:03,571 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-29 04:11:03,571 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-29 04:11:03,572 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-29 04:11:03,572 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-29 04:11:03,572 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-29 04:11:03,572 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-29 04:11:03,572 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-29 04:11:03,573 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-29 04:11:03,573 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-29 04:11:03,573 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-29 04:11:03,573 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-29 04:11:03,573 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-29 04:11:03,574 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-29 04:11:03,574 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-29 04:11:03,574 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-29 04:11:03,574 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-29 04:11:04,214 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-29 04:11:04,215 INFO L298 CfgBuilder]: Removed 5 assume(true) statements. [2020-10-29 04:11:04,217 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 04:11:04 BoogieIcfgContainer [2020-10-29 04:11:04,217 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-29 04:11:04,221 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-29 04:11:04,221 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-29 04:11:04,226 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-29 04:11:04,226 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 04:11:03" (1/3) ... [2020-10-29 04:11:04,228 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@88af2a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 04:11:04, skipping insertion in model container [2020-10-29 04:11:04,228 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 04:11:03" (2/3) ... [2020-10-29 04:11:04,229 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@88af2a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 04:11:04, skipping insertion in model container [2020-10-29 04:11:04,229 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 04:11:04" (3/3) ... [2020-10-29 04:11:04,232 INFO L111 eAbstractionObserver]: Analyzing ICFG revcpyswp2.c [2020-10-29 04:11:04,245 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-29 04:11:04,251 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-29 04:11:04,265 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-29 04:11:04,291 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-29 04:11:04,291 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-29 04:11:04,292 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-29 04:11:04,292 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-29 04:11:04,292 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-29 04:11:04,292 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-29 04:11:04,292 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-29 04:11:04,292 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-29 04:11:04,310 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states. [2020-10-29 04:11:04,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-29 04:11:04,316 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 04:11:04,317 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] [2020-10-29 04:11:04,317 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 04:11:04,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 04:11:04,324 INFO L82 PathProgramCache]: Analyzing trace with hash 880128442, now seen corresponding path program 1 times [2020-10-29 04:11:04,334 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 04:11:04,334 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [755631054] [2020-10-29 04:11:04,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 04:11:04,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:11:04,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:11:04,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:11:04,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:11:04,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:11:05,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:11:05,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:11:05,703 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:11:05,704 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-29 04:11:05,704 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 04:11:05,704 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1200 [2020-10-29 04:11:05,707 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:11:05,708 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:11:05,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 04:11:05,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 04:11:05,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-29 04:11:05,709 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-29 04:11:05,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 04:11:05,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:11:05,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:11:05,868 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:11:05,868 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 04:11:05,868 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 04:11:05,868 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-29 04:11:05,869 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:11:05,869 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:11:05,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 04:11:05,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 04:11:05,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 04:11:05,870 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 04:11:05,880 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 04:11:05,881 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [755631054] [2020-10-29 04:11:05,883 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 04:11:05,884 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 04:11:05,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566973026] [2020-10-29 04:11:05,889 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 04:11:05,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 04:11:05,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 04:11:05,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 04:11:05,908 INFO L87 Difference]: Start difference. First operand 38 states. Second operand 5 states. [2020-10-29 04:11:06,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 04:11:06,275 INFO L93 Difference]: Finished difference Result 81 states and 113 transitions. [2020-10-29 04:11:06,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-29 04:11:06,278 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2020-10-29 04:11:06,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 04:11:06,287 INFO L225 Difference]: With dead ends: 81 [2020-10-29 04:11:06,287 INFO L226 Difference]: Without dead ends: 42 [2020-10-29 04:11:06,291 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-29 04:11:06,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-29 04:11:06,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 34. [2020-10-29 04:11:06,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-29 04:11:06,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2020-10-29 04:11:06,342 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 21 [2020-10-29 04:11:06,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 04:11:06,342 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2020-10-29 04:11:06,342 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 04:11:06,343 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2020-10-29 04:11:06,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-29 04:11:06,344 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 04:11:06,344 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 04:11:06,344 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-29 04:11:06,344 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 04:11:06,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 04:11:06,346 INFO L82 PathProgramCache]: Analyzing trace with hash 2053054216, now seen corresponding path program 1 times [2020-10-29 04:11:06,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 04:11:06,346 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [661090674] [2020-10-29 04:11:06,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 04:11:06,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:11:06,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:11:06,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:11:06,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:11:06,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:11:07,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:11:08,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:11:11,380 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:11:11,381 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-29 04:11:11,385 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 04:11:11,385 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-29 04:11:11,385 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:11:11,386 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:11:11,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-29 04:11:11,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 04:11:11,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-29 04:11:11,387 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 04:11:11,890 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 42 [2020-10-29 04:11:12,149 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 34 [2020-10-29 04:11:12,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 04:11:12,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:11:12,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:11:12,451 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:11:12,451 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 04:11:12,451 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 04:11:12,451 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-29 04:11:12,452 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:11:12,452 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:11:12,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 04:11:12,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 04:11:12,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 04:11:12,453 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 04:11:12,472 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-29 04:11:12,472 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [661090674] [2020-10-29 04:11:12,473 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 04:11:12,473 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-29 04:11:12,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888888905] [2020-10-29 04:11:12,475 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-29 04:11:12,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 04:11:12,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-29 04:11:12,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2020-10-29 04:11:12,481 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand 14 states. [2020-10-29 04:11:13,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 04:11:13,576 INFO L93 Difference]: Finished difference Result 63 states and 71 transitions. [2020-10-29 04:11:13,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-29 04:11:13,577 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 29 [2020-10-29 04:11:13,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 04:11:13,581 INFO L225 Difference]: With dead ends: 63 [2020-10-29 04:11:13,581 INFO L226 Difference]: Without dead ends: 60 [2020-10-29 04:11:13,584 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-10-29 04:11:13,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-29 04:11:13,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 47. [2020-10-29 04:11:13,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-29 04:11:13,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 53 transitions. [2020-10-29 04:11:13,610 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 53 transitions. Word has length 29 [2020-10-29 04:11:13,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 04:11:13,611 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 53 transitions. [2020-10-29 04:11:13,611 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-29 04:11:13,611 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 53 transitions. [2020-10-29 04:11:13,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-29 04:11:13,613 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 04:11:13,613 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] [2020-10-29 04:11:13,613 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-29 04:11:13,614 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 04:11:13,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 04:11:13,617 INFO L82 PathProgramCache]: Analyzing trace with hash -1259434806, now seen corresponding path program 2 times [2020-10-29 04:11:13,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 04:11:13,618 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1458344141] [2020-10-29 04:11:13,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 04:11:13,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:11:13,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:11:13,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:11:13,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:11:14,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:11:14,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:11:14,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:11:15,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:11:18,647 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:11:18,647 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-29 04:11:18,647 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-29 04:11:18,648 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-29 04:11:18,648 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:11:18,648 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:11:18,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-29 04:11:18,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 04:11:18,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-29 04:11:18,649 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 04:11:19,577 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 04:11:19,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:11:19,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:11:19,593 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:11:19,593 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 04:11:19,593 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 04:11:19,594 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-29 04:11:19,594 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:11:19,596 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:11:19,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 04:11:19,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 04:11:19,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 04:11:19,597 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-29 04:11:19,610 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-29 04:11:19,612 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1458344141] [2020-10-29 04:11:19,612 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 04:11:19,612 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-29 04:11:19,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872622746] [2020-10-29 04:11:19,614 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-29 04:11:19,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 04:11:19,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-29 04:11:19,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2020-10-29 04:11:19,616 INFO L87 Difference]: Start difference. First operand 47 states and 53 transitions. Second operand 15 states. [2020-10-29 04:11:20,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 04:11:20,522 INFO L93 Difference]: Finished difference Result 79 states and 90 transitions. [2020-10-29 04:11:20,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-29 04:11:20,522 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 31 [2020-10-29 04:11:20,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 04:11:20,526 INFO L225 Difference]: With dead ends: 79 [2020-10-29 04:11:20,526 INFO L226 Difference]: Without dead ends: 76 [2020-10-29 04:11:20,527 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2020-10-29 04:11:20,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-29 04:11:20,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 49. [2020-10-29 04:11:20,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-29 04:11:20,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 56 transitions. [2020-10-29 04:11:20,541 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 56 transitions. Word has length 31 [2020-10-29 04:11:20,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 04:11:20,542 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 56 transitions. [2020-10-29 04:11:20,542 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-29 04:11:20,542 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 56 transitions. [2020-10-29 04:11:20,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-29 04:11:20,543 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 04:11:20,544 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] [2020-10-29 04:11:20,544 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-29 04:11:20,544 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 04:11:20,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 04:11:20,545 INFO L82 PathProgramCache]: Analyzing trace with hash 1922348170, now seen corresponding path program 3 times [2020-10-29 04:11:20,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 04:11:20,545 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1843114095] [2020-10-29 04:11:20,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 04:11:20,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:11:20,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:11:20,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:11:20,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:11:20,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:11:21,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:11:21,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:11:21,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:11:25,563 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:11:25,564 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-29 04:11:25,564 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-29 04:11:25,567 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-29 04:11:25,568 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:11:25,568 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:11:25,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 04:11:25,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 04:11:25,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-29 04:11:25,569 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 04:11:25,650 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 04:11:25,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:11:25,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:11:25,661 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:11:25,661 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 04:11:25,662 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 04:11:25,662 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-29 04:11:25,662 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:11:25,662 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:11:25,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 04:11:25,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 04:11:25,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 04:11:25,663 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 04:11:25,671 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 04:11:25,672 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1843114095] [2020-10-29 04:11:25,673 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 04:11:25,673 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-29 04:11:25,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690389660] [2020-10-29 04:11:25,675 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 04:11:25,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 04:11:25,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 04:11:25,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-29 04:11:25,676 INFO L87 Difference]: Start difference. First operand 49 states and 56 transitions. Second operand 6 states. [2020-10-29 04:11:25,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 04:11:25,920 INFO L93 Difference]: Finished difference Result 86 states and 101 transitions. [2020-10-29 04:11:25,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-29 04:11:25,921 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 31 [2020-10-29 04:11:25,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 04:11:25,922 INFO L225 Difference]: With dead ends: 86 [2020-10-29 04:11:25,922 INFO L226 Difference]: Without dead ends: 47 [2020-10-29 04:11:25,923 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-10-29 04:11:25,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-29 04:11:25,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 42. [2020-10-29 04:11:25,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-29 04:11:25,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2020-10-29 04:11:25,938 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 31 [2020-10-29 04:11:25,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 04:11:25,938 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2020-10-29 04:11:25,938 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 04:11:25,938 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2020-10-29 04:11:25,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-29 04:11:25,942 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 04:11:25,943 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] [2020-10-29 04:11:25,943 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-29 04:11:25,943 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 04:11:25,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 04:11:25,944 INFO L82 PathProgramCache]: Analyzing trace with hash -1775554160, now seen corresponding path program 4 times [2020-10-29 04:11:25,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 04:11:25,945 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1477307994] [2020-10-29 04:11:25,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 04:11:25,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:11:25,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:11:26,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:11:26,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:11:30,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:11:30,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:11:31,162 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:11:31,162 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-29 04:11:31,162 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 04:11:31,162 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5188 [2020-10-29 04:11:31,163 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:11:31,163 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:11:31,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-29 04:11:31,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 04:11:31,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-29 04:11:31,163 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 04:11:31,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 04:11:31,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:11:31,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:11:31,875 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:11:31,875 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 04:11:31,875 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 04:11:31,875 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 04:11:31,876 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:11:31,876 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:11:31,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 04:11:31,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 04:11:31,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 04:11:31,877 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 04:11:31,903 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-29 04:11:31,904 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1477307994] [2020-10-29 04:11:31,907 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 04:11:31,907 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-29 04:11:31,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411695420] [2020-10-29 04:11:31,908 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-29 04:11:31,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 04:11:31,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-29 04:11:31,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2020-10-29 04:11:31,910 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand 16 states. [2020-10-29 04:11:32,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 04:11:32,865 INFO L93 Difference]: Finished difference Result 75 states and 84 transitions. [2020-10-29 04:11:32,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-29 04:11:32,866 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 37 [2020-10-29 04:11:32,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 04:11:32,867 INFO L225 Difference]: With dead ends: 75 [2020-10-29 04:11:32,868 INFO L226 Difference]: Without dead ends: 72 [2020-10-29 04:11:32,868 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2020-10-29 04:11:32,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-29 04:11:32,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 57. [2020-10-29 04:11:32,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-29 04:11:32,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 63 transitions. [2020-10-29 04:11:32,882 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 63 transitions. Word has length 37 [2020-10-29 04:11:32,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 04:11:32,882 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 63 transitions. [2020-10-29 04:11:32,882 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-29 04:11:32,882 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 63 transitions. [2020-10-29 04:11:32,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-29 04:11:32,885 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 04:11:32,886 INFO L422 BasicCegarLoop]: trace histogram [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 04:11:32,888 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-29 04:11:32,890 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 04:11:32,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 04:11:32,892 INFO L82 PathProgramCache]: Analyzing trace with hash 234888530, now seen corresponding path program 5 times [2020-10-29 04:11:32,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 04:11:32,892 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [281684702] [2020-10-29 04:11:32,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 04:11:32,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:11:32,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:11:33,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:11:33,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:11:37,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:11:37,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:11:37,936 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:11:37,936 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-29 04:11:37,936 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 04:11:37,936 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-29 04:11:37,936 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:11:37,937 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:11:37,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-29 04:11:37,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 04:11:37,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-29 04:11:37,937 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 04:11:38,052 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 04:11:38,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:11:38,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:11:38,058 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:11:38,059 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 04:11:38,059 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 04:11:38,059 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 04:11:38,059 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:11:38,059 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:11:38,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 04:11:38,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 04:11:38,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 04:11:38,060 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 04:11:38,065 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-29 04:11:38,066 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [281684702] [2020-10-29 04:11:38,066 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 04:11:38,066 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-29 04:11:38,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260372174] [2020-10-29 04:11:38,067 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-29 04:11:38,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 04:11:38,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-29 04:11:38,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-29 04:11:38,068 INFO L87 Difference]: Start difference. First operand 57 states and 63 transitions. Second operand 10 states. [2020-10-29 04:11:38,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 04:11:38,584 INFO L93 Difference]: Finished difference Result 149 states and 169 transitions. [2020-10-29 04:11:38,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-29 04:11:38,585 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 39 [2020-10-29 04:11:38,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 04:11:38,586 INFO L225 Difference]: With dead ends: 149 [2020-10-29 04:11:38,586 INFO L226 Difference]: Without dead ends: 105 [2020-10-29 04:11:38,587 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2020-10-29 04:11:38,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-29 04:11:38,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 86. [2020-10-29 04:11:38,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-29 04:11:38,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 95 transitions. [2020-10-29 04:11:38,607 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 95 transitions. Word has length 39 [2020-10-29 04:11:38,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 04:11:38,608 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 95 transitions. [2020-10-29 04:11:38,608 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-29 04:11:38,608 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 95 transitions. [2020-10-29 04:11:38,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-29 04:11:38,609 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 04:11:38,609 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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 04:11:38,609 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-29 04:11:38,610 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 04:11:38,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 04:11:38,610 INFO L82 PathProgramCache]: Analyzing trace with hash 1466100182, now seen corresponding path program 6 times [2020-10-29 04:11:38,610 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 04:11:38,611 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1122365729] [2020-10-29 04:11:38,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 04:11:38,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:11:38,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:11:38,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:11:38,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:11:43,657 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:11:43,657 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-29 04:11:43,657 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 04:11:43,658 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5027 [2020-10-29 04:11:43,658 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:11:43,658 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:11:43,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-29 04:11:43,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 04:11:43,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-29 04:11:43,659 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 04:11:43,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 04:11:43,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:11:43,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:11:43,780 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:11:43,781 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 04:11:43,781 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 04:11:43,781 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 04:11:43,781 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:11:43,782 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:11:43,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 04:11:43,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 04:11:43,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 04:11:43,782 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 04:11:43,788 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-29 04:11:43,789 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1122365729] [2020-10-29 04:11:43,789 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 04:11:43,789 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-29 04:11:43,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099017373] [2020-10-29 04:11:43,790 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-29 04:11:43,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 04:11:43,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-29 04:11:43,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-10-29 04:11:43,791 INFO L87 Difference]: Start difference. First operand 86 states and 95 transitions. Second operand 10 states. [2020-10-29 04:11:44,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 04:11:44,468 INFO L93 Difference]: Finished difference Result 128 states and 137 transitions. [2020-10-29 04:11:44,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-29 04:11:44,470 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 43 [2020-10-29 04:11:44,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 04:11:44,472 INFO L225 Difference]: With dead ends: 128 [2020-10-29 04:11:44,472 INFO L226 Difference]: Without dead ends: 93 [2020-10-29 04:11:44,473 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2020-10-29 04:11:44,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-29 04:11:44,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 81. [2020-10-29 04:11:44,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-29 04:11:44,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 86 transitions. [2020-10-29 04:11:44,490 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 86 transitions. Word has length 43 [2020-10-29 04:11:44,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 04:11:44,491 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 86 transitions. [2020-10-29 04:11:44,491 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-29 04:11:44,491 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 86 transitions. [2020-10-29 04:11:44,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-29 04:11:44,492 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 04:11:44,492 INFO L422 BasicCegarLoop]: trace histogram [2, 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] [2020-10-29 04:11:44,493 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-29 04:11:44,493 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 04:11:44,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 04:11:44,493 INFO L82 PathProgramCache]: Analyzing trace with hash 1971639481, now seen corresponding path program 1 times [2020-10-29 04:11:44,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 04:11:44,494 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [248027004] [2020-10-29 04:11:44,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 04:11:44,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:11:44,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:11:44,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:11:44,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:11:45,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:11:46,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:11:47,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:11:47,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:11:48,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:11:49,520 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:11:49,520 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-29 04:11:49,520 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-29 04:11:49,521 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-29 04:11:49,521 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:11:49,521 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:11:49,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-29 04:11:49,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 04:11:49,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-29 04:11:49,521 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 04:11:50,247 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 04:11:50,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:11:50,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:11:50,257 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:11:50,257 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 04:11:50,258 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 04:11:50,258 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 04:11:50,258 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:11:50,258 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:11:50,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 04:11:50,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 04:11:50,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 04:11:50,259 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 04:11:50,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-10-29 04:11:50,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:11:50,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:11:50,280 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:11:50,280 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 04:11:50,281 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 04:11:50,281 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 04:11:50,281 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:11:50,281 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:11:50,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 04:11:50,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 04:11:50,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-29 04:11:50,282 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 04:11:50,306 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-29 04:11:50,307 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [248027004] [2020-10-29 04:11:50,307 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 04:11:50,307 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-29 04:11:50,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684409056] [2020-10-29 04:11:50,309 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-29 04:11:50,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 04:11:50,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-29 04:11:50,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2020-10-29 04:11:50,310 INFO L87 Difference]: Start difference. First operand 81 states and 86 transitions. Second operand 18 states. [2020-10-29 04:11:51,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 04:11:51,068 INFO L93 Difference]: Finished difference Result 92 states and 98 transitions. [2020-10-29 04:11:51,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-29 04:11:51,069 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 45 [2020-10-29 04:11:51,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 04:11:51,070 INFO L225 Difference]: With dead ends: 92 [2020-10-29 04:11:51,070 INFO L226 Difference]: Without dead ends: 58 [2020-10-29 04:11:51,071 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2020-10-29 04:11:51,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-29 04:11:51,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 50. [2020-10-29 04:11:51,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-29 04:11:51,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2020-10-29 04:11:51,092 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 45 [2020-10-29 04:11:51,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 04:11:51,092 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2020-10-29 04:11:51,092 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-29 04:11:51,092 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2020-10-29 04:11:51,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-29 04:11:51,095 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 04:11:51,095 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 04:11:51,095 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-29 04:11:51,095 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 04:11:51,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 04:11:51,096 INFO L82 PathProgramCache]: Analyzing trace with hash 1613421592, now seen corresponding path program 7 times [2020-10-29 04:11:51,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 04:11:51,097 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2119074672] [2020-10-29 04:11:51,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 04:11:51,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:11:51,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:11:51,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:11:53,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:11:55,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:11:56,174 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:11:56,174 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-29 04:11:56,174 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 04:11:56,175 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-29 04:11:56,175 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:11:56,175 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:11:56,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-29 04:11:56,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 04:11:56,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-29 04:11:56,175 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 04:11:57,174 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 04:11:57,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:11:57,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:11:57,181 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:11:57,182 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 04:11:57,182 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 04:11:57,182 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 04:11:57,182 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:11:57,182 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:11:57,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 04:11:57,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 04:11:57,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 04:11:57,183 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 04:11:57,206 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-29 04:11:57,206 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2119074672] [2020-10-29 04:11:57,207 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 04:11:57,207 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-29 04:11:57,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882402448] [2020-10-29 04:11:57,207 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-29 04:11:57,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 04:11:57,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-29 04:11:57,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2020-10-29 04:11:57,209 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand 18 states. [2020-10-29 04:11:58,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 04:11:58,073 INFO L93 Difference]: Finished difference Result 80 states and 88 transitions. [2020-10-29 04:11:58,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-29 04:11:58,079 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 45 [2020-10-29 04:11:58,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 04:11:58,080 INFO L225 Difference]: With dead ends: 80 [2020-10-29 04:11:58,080 INFO L226 Difference]: Without dead ends: 77 [2020-10-29 04:11:58,082 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2020-10-29 04:11:58,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-29 04:11:58,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 67. [2020-10-29 04:11:58,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-29 04:11:58,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 73 transitions. [2020-10-29 04:11:58,101 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 73 transitions. Word has length 45 [2020-10-29 04:11:58,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 04:11:58,102 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 73 transitions. [2020-10-29 04:11:58,102 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-29 04:11:58,102 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 73 transitions. [2020-10-29 04:11:58,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-29 04:11:58,103 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 04:11:58,103 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 04:11:58,104 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-29 04:11:58,104 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 04:11:58,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 04:11:58,104 INFO L82 PathProgramCache]: Analyzing trace with hash 25922970, now seen corresponding path program 8 times [2020-10-29 04:11:58,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 04:11:58,105 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2120149761] [2020-10-29 04:11:58,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 04:11:58,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:11:58,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:11:58,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:11:58,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:12:03,145 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:12:03,146 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-29 04:12:03,146 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 04:12:03,146 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5020 [2020-10-29 04:12:03,146 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:12:03,147 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:12:03,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-29 04:12:03,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-29 04:12:03,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-29 04:12:03,147 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 04:12:03,276 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 04:12:03,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:12:03,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:12:03,284 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:12:03,284 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 04:12:03,284 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 04:12:03,284 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 04:12:03,284 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:12:03,284 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:12:03,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 04:12:03,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 04:12:03,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 04:12:03,285 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 04:12:03,289 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-29 04:12:03,289 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2120149761] [2020-10-29 04:12:03,290 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 04:12:03,290 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-29 04:12:03,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594302825] [2020-10-29 04:12:03,290 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-29 04:12:03,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 04:12:03,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-29 04:12:03,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-29 04:12:03,292 INFO L87 Difference]: Start difference. First operand 67 states and 73 transitions. Second operand 12 states. [2020-10-29 04:12:04,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 04:12:04,247 INFO L93 Difference]: Finished difference Result 174 states and 194 transitions. [2020-10-29 04:12:04,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-29 04:12:04,248 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 47 [2020-10-29 04:12:04,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 04:12:04,250 INFO L225 Difference]: With dead ends: 174 [2020-10-29 04:12:04,250 INFO L226 Difference]: Without dead ends: 129 [2020-10-29 04:12:04,252 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=113, Invalid=349, Unknown=0, NotChecked=0, Total=462 [2020-10-29 04:12:04,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-10-29 04:12:04,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 89. [2020-10-29 04:12:04,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-29 04:12:04,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 97 transitions. [2020-10-29 04:12:04,268 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 97 transitions. Word has length 47 [2020-10-29 04:12:04,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 04:12:04,269 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 97 transitions. [2020-10-29 04:12:04,269 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-29 04:12:04,269 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 97 transitions. [2020-10-29 04:12:04,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-29 04:12:04,273 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 04:12:04,273 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 04:12:04,273 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-29 04:12:04,273 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 04:12:04,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 04:12:04,274 INFO L82 PathProgramCache]: Analyzing trace with hash 582590172, now seen corresponding path program 9 times [2020-10-29 04:12:04,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 04:12:04,277 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1240817972] [2020-10-29 04:12:04,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 04:12:04,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:12:04,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:12:04,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:12:04,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:12:06,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:12:09,504 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:12:09,504 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-29 04:12:09,504 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 04:12:09,505 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5197 [2020-10-29 04:12:09,505 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:12:09,505 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:12:09,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-29 04:12:09,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 04:12:09,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-29 04:12:09,506 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 04:12:09,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 04:12:09,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:12:09,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:12:09,637 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:12:09,638 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 04:12:09,638 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 04:12:09,638 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 04:12:09,638 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:12:09,638 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:12:09,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 04:12:09,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 04:12:09,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 04:12:09,639 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 04:12:09,644 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-29 04:12:09,644 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1240817972] [2020-10-29 04:12:09,644 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 04:12:09,645 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-29 04:12:09,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068630781] [2020-10-29 04:12:09,645 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-29 04:12:09,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 04:12:09,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-29 04:12:09,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-29 04:12:09,646 INFO L87 Difference]: Start difference. First operand 89 states and 97 transitions. Second operand 12 states. [2020-10-29 04:12:10,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 04:12:10,268 INFO L93 Difference]: Finished difference Result 170 states and 187 transitions. [2020-10-29 04:12:10,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-29 04:12:10,268 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 49 [2020-10-29 04:12:10,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 04:12:10,270 INFO L225 Difference]: With dead ends: 170 [2020-10-29 04:12:10,270 INFO L226 Difference]: Without dead ends: 124 [2020-10-29 04:12:10,271 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-10-29 04:12:10,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-10-29 04:12:10,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 101. [2020-10-29 04:12:10,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-29 04:12:10,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 107 transitions. [2020-10-29 04:12:10,302 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 107 transitions. Word has length 49 [2020-10-29 04:12:10,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 04:12:10,302 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 107 transitions. [2020-10-29 04:12:10,302 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-29 04:12:10,303 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 107 transitions. [2020-10-29 04:12:10,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-29 04:12:10,304 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 04:12:10,304 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 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] [2020-10-29 04:12:10,304 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-29 04:12:10,304 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 04:12:10,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 04:12:10,305 INFO L82 PathProgramCache]: Analyzing trace with hash 110458689, now seen corresponding path program 2 times [2020-10-29 04:12:10,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 04:12:10,305 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1275519545] [2020-10-29 04:12:10,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 04:12:10,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:12:10,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:12:10,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:12:11,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:12:12,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:12:13,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:12:14,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:12:15,353 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:12:15,353 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-29 04:12:15,353 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 04:12:15,354 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-29 04:12:15,354 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:12:15,354 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:12:15,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-29 04:12:15,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 04:12:15,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-29 04:12:15,354 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 04:12:16,366 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 04:12:16,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:12:16,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:12:16,373 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:12:16,374 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 04:12:16,374 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 04:12:16,374 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 04:12:16,374 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:12:16,374 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:12:16,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 04:12:16,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 04:12:16,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 04:12:16,375 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 04:12:16,376 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-10-29 04:12:16,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:12:16,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:12:16,382 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:12:16,382 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 04:12:16,382 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 04:12:16,382 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 04:12:16,382 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:12:16,382 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:12:16,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 04:12:16,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 04:12:16,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-29 04:12:16,383 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 04:12:16,404 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 2 proven. 27 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-29 04:12:16,404 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1275519545] [2020-10-29 04:12:16,405 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 04:12:16,405 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-29 04:12:16,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996391195] [2020-10-29 04:12:16,405 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-29 04:12:16,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 04:12:16,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-29 04:12:16,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2020-10-29 04:12:16,407 INFO L87 Difference]: Start difference. First operand 101 states and 107 transitions. Second operand 20 states. [2020-10-29 04:12:17,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 04:12:17,422 INFO L93 Difference]: Finished difference Result 116 states and 123 transitions. [2020-10-29 04:12:17,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-29 04:12:17,423 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 53 [2020-10-29 04:12:17,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 04:12:17,424 INFO L225 Difference]: With dead ends: 116 [2020-10-29 04:12:17,424 INFO L226 Difference]: Without dead ends: 111 [2020-10-29 04:12:17,425 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 6 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=109, Invalid=593, Unknown=0, NotChecked=0, Total=702 [2020-10-29 04:12:17,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-29 04:12:17,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 103. [2020-10-29 04:12:17,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-10-29 04:12:17,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 108 transitions. [2020-10-29 04:12:17,443 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 108 transitions. Word has length 53 [2020-10-29 04:12:17,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 04:12:17,444 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 108 transitions. [2020-10-29 04:12:17,444 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-29 04:12:17,444 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 108 transitions. [2020-10-29 04:12:17,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-29 04:12:17,445 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 04:12:17,445 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 04:12:17,445 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-29 04:12:17,446 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 04:12:17,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 04:12:17,446 INFO L82 PathProgramCache]: Analyzing trace with hash -705290592, now seen corresponding path program 10 times [2020-10-29 04:12:17,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 04:12:17,447 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [214547541] [2020-10-29 04:12:17,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 04:12:17,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:12:17,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:12:18,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:12:20,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:12:22,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:12:22,988 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:12:22,988 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-29 04:12:22,988 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 04:12:22,988 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5473 [2020-10-29 04:12:22,989 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:12:22,989 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:12:22,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-29 04:12:22,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 04:12:22,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-29 04:12:22,989 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 04:12:24,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 04:12:24,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:12:24,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:12:24,123 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:12:24,123 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 04:12:24,123 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 04:12:24,123 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 04:12:24,123 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:12:24,123 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:12:24,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 04:12:24,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 04:12:24,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 04:12:24,124 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 04:12:24,147 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 4 proven. 32 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-10-29 04:12:24,147 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [214547541] [2020-10-29 04:12:24,147 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 04:12:24,148 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-29 04:12:24,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074725853] [2020-10-29 04:12:24,148 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-29 04:12:24,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 04:12:24,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-29 04:12:24,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2020-10-29 04:12:24,149 INFO L87 Difference]: Start difference. First operand 103 states and 108 transitions. Second operand 20 states. [2020-10-29 04:12:24,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 04:12:24,947 INFO L93 Difference]: Finished difference Result 118 states and 124 transitions. [2020-10-29 04:12:24,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-29 04:12:24,947 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 53 [2020-10-29 04:12:24,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 04:12:24,949 INFO L225 Difference]: With dead ends: 118 [2020-10-29 04:12:24,949 INFO L226 Difference]: Without dead ends: 115 [2020-10-29 04:12:24,950 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 6 SyntacticMatches, 6 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2020-10-29 04:12:24,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-29 04:12:24,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 109. [2020-10-29 04:12:24,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-10-29 04:12:24,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 114 transitions. [2020-10-29 04:12:24,973 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 114 transitions. Word has length 53 [2020-10-29 04:12:24,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 04:12:24,973 INFO L481 AbstractCegarLoop]: Abstraction has 109 states and 114 transitions. [2020-10-29 04:12:24,973 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-29 04:12:24,973 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 114 transitions. [2020-10-29 04:12:24,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-29 04:12:24,974 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 04:12:24,974 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 04:12:24,975 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-29 04:12:24,975 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 04:12:24,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 04:12:24,975 INFO L82 PathProgramCache]: Analyzing trace with hash -785720982, now seen corresponding path program 3 times [2020-10-29 04:12:24,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 04:12:24,976 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2122564922] [2020-10-29 04:12:24,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 04:12:25,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:12:25,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:12:25,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:12:25,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:12:26,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:12:27,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:12:29,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:12:30,035 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:12:30,035 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-29 04:12:30,035 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 04:12:30,035 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-29 04:12:30,035 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:12:30,035 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:12:30,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-29 04:12:30,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 04:12:30,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-29 04:12:30,036 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 04:12:30,854 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 154 DAG size of output: 51 [2020-10-29 04:12:31,211 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 56 [2020-10-29 04:12:31,374 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 46 [2020-10-29 04:12:31,698 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 58 [2020-10-29 04:12:32,046 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 48 [2020-10-29 04:12:32,274 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 40 [2020-10-29 04:12:32,692 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 04:12:32,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:12:32,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:12:32,699 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:12:32,699 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 04:12:32,699 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 04:12:32,699 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 04:12:32,699 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:12:32,700 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:12:32,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 04:12:32,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 04:12:32,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 04:12:32,700 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 04:12:32,702 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-10-29 04:12:32,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:12:32,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:12:32,708 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:12:32,708 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 04:12:32,709 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 04:12:32,709 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 04:12:32,709 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:12:32,709 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:12:32,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 04:12:32,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 04:12:32,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-29 04:12:32,710 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 04:12:32,711 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-10-29 04:12:32,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:12:32,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:12:32,718 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:12:32,718 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 04:12:32,718 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 04:12:32,719 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 04:12:32,719 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:12:32,719 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:12:32,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 04:12:32,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 04:12:32,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-29 04:12:32,720 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 04:12:32,766 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 4 proven. 35 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-10-29 04:12:32,766 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2122564922] [2020-10-29 04:12:32,767 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 04:12:32,767 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-29 04:12:32,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452540674] [2020-10-29 04:12:32,767 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-29 04:12:32,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 04:12:32,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-29 04:12:32,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2020-10-29 04:12:32,769 INFO L87 Difference]: Start difference. First operand 109 states and 114 transitions. Second operand 23 states. [2020-10-29 04:12:33,959 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 50 [2020-10-29 04:12:34,309 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 50 [2020-10-29 04:12:35,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 04:12:35,095 INFO L93 Difference]: Finished difference Result 125 states and 132 transitions. [2020-10-29 04:12:35,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-29 04:12:35,096 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 61 [2020-10-29 04:12:35,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 04:12:35,097 INFO L225 Difference]: With dead ends: 125 [2020-10-29 04:12:35,097 INFO L226 Difference]: Without dead ends: 77 [2020-10-29 04:12:35,098 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 7 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=161, Invalid=1029, Unknown=0, NotChecked=0, Total=1190 [2020-10-29 04:12:35,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-29 04:12:35,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 64. [2020-10-29 04:12:35,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-29 04:12:35,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 68 transitions. [2020-10-29 04:12:35,111 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 68 transitions. Word has length 61 [2020-10-29 04:12:35,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 04:12:35,112 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 68 transitions. [2020-10-29 04:12:35,112 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-29 04:12:35,112 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 68 transitions. [2020-10-29 04:12:35,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-29 04:12:35,112 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 04:12:35,113 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 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] [2020-10-29 04:12:35,113 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-29 04:12:35,113 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 04:12:35,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 04:12:35,113 INFO L82 PathProgramCache]: Analyzing trace with hash -363220535, now seen corresponding path program 4 times [2020-10-29 04:12:35,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 04:12:35,114 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1076093850] [2020-10-29 04:12:35,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 04:12:35,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:12:35,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:12:37,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:12:38,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:12:40,190 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:12:40,190 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-29 04:12:40,190 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 04:12:40,190 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5030 [2020-10-29 04:12:40,190 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:12:40,191 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:12:40,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-29 04:12:40,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 04:12:40,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-29 04:12:40,191 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 04:12:41,317 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 04:12:41,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:12:41,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:12:41,322 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:12:41,322 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 04:12:41,322 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 04:12:41,322 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 04:12:41,323 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:12:41,323 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:12:41,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 04:12:41,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 04:12:41,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 04:12:41,323 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 04:12:41,325 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-10-29 04:12:41,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:12:41,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:12:41,330 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:12:41,330 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 04:12:41,330 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 04:12:41,330 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 04:12:41,330 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:12:41,330 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:12:41,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 04:12:41,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 04:12:41,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-29 04:12:41,331 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 04:12:41,356 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 2 proven. 44 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-10-29 04:12:41,356 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1076093850] [2020-10-29 04:12:41,356 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 04:12:41,357 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-29 04:12:41,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893019609] [2020-10-29 04:12:41,357 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-29 04:12:41,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 04:12:41,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-29 04:12:41,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=508, Unknown=0, NotChecked=0, Total=600 [2020-10-29 04:12:41,359 INFO L87 Difference]: Start difference. First operand 64 states and 68 transitions. Second operand 25 states. [2020-10-29 04:12:42,892 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 53 [2020-10-29 04:12:44,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 04:12:44,344 INFO L93 Difference]: Finished difference Result 122 states and 135 transitions. [2020-10-29 04:12:44,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-29 04:12:44,345 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 61 [2020-10-29 04:12:44,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 04:12:44,347 INFO L225 Difference]: With dead ends: 122 [2020-10-29 04:12:44,347 INFO L226 Difference]: Without dead ends: 119 [2020-10-29 04:12:44,348 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 7 SyntacticMatches, 4 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 479 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=276, Invalid=1704, Unknown=0, NotChecked=0, Total=1980 [2020-10-29 04:12:44,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-10-29 04:12:44,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 87. [2020-10-29 04:12:44,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-29 04:12:44,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 94 transitions. [2020-10-29 04:12:44,365 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 94 transitions. Word has length 61 [2020-10-29 04:12:44,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 04:12:44,365 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 94 transitions. [2020-10-29 04:12:44,365 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-29 04:12:44,365 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 94 transitions. [2020-10-29 04:12:44,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-29 04:12:44,367 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 04:12:44,367 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 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] [2020-10-29 04:12:44,367 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-29 04:12:44,367 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 04:12:44,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 04:12:44,368 INFO L82 PathProgramCache]: Analyzing trace with hash 1326600011, now seen corresponding path program 5 times [2020-10-29 04:12:44,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 04:12:44,368 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [813383913] [2020-10-29 04:12:44,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 04:12:44,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:12:44,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:12:44,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:12:44,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:12:49,426 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:12:49,427 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-29 04:12:49,427 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 04:12:49,427 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5030 [2020-10-29 04:12:49,427 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:12:49,427 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:12:49,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-29 04:12:49,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 04:12:49,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-29 04:12:49,427 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 04:12:49,621 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 04:12:49,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:12:49,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:12:49,627 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:12:49,627 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 04:12:49,628 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 04:12:49,628 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 04:12:49,628 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:12:49,629 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:12:49,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 04:12:49,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 04:12:49,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 04:12:49,630 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 04:12:49,633 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-10-29 04:12:49,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:12:49,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:12:49,637 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:12:49,637 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 04:12:49,638 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 04:12:49,638 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 04:12:49,638 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:12:49,638 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:12:49,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 04:12:49,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-29 04:12:49,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 04:12:49,639 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 04:12:49,650 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 27 proven. 16 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2020-10-29 04:12:49,650 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [813383913] [2020-10-29 04:12:49,650 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 04:12:49,650 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-29 04:12:49,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843607237] [2020-10-29 04:12:49,651 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-29 04:12:49,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 04:12:49,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-29 04:12:49,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-29 04:12:49,652 INFO L87 Difference]: Start difference. First operand 87 states and 94 transitions. Second operand 14 states. [2020-10-29 04:12:50,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 04:12:50,478 INFO L93 Difference]: Finished difference Result 227 states and 251 transitions. [2020-10-29 04:12:50,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-29 04:12:50,479 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 63 [2020-10-29 04:12:50,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 04:12:50,480 INFO L225 Difference]: With dead ends: 227 [2020-10-29 04:12:50,481 INFO L226 Difference]: Without dead ends: 161 [2020-10-29 04:12:50,482 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2020-10-29 04:12:50,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-10-29 04:12:50,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 136. [2020-10-29 04:12:50,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-10-29 04:12:50,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 147 transitions. [2020-10-29 04:12:50,512 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 147 transitions. Word has length 63 [2020-10-29 04:12:50,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 04:12:50,512 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 147 transitions. [2020-10-29 04:12:50,512 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-29 04:12:50,512 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 147 transitions. [2020-10-29 04:12:50,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-29 04:12:50,513 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 04:12:50,513 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 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] [2020-10-29 04:12:50,513 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-29 04:12:50,513 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 04:12:50,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 04:12:50,514 INFO L82 PathProgramCache]: Analyzing trace with hash -724633585, now seen corresponding path program 6 times [2020-10-29 04:12:50,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 04:12:50,514 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [330453616] [2020-10-29 04:12:50,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 04:12:50,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:12:50,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:12:51,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:12:51,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:12:55,661 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:12:55,661 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-29 04:12:55,661 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 04:12:55,661 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5123 [2020-10-29 04:12:55,661 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:12:55,661 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:12:55,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-29 04:12:55,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 04:12:55,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-29 04:12:55,662 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 04:12:55,857 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 04:12:55,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:12:55,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:12:55,863 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:12:55,864 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 04:12:55,864 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 04:12:55,864 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 04:12:55,864 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:12:55,864 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:12:55,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 04:12:55,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 04:12:55,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 04:12:55,865 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 04:12:55,868 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-10-29 04:12:55,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:12:55,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:12:55,871 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:12:55,871 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 04:12:55,871 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 04:12:55,871 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 04:12:55,871 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:12:55,872 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:12:55,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 04:12:55,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-29 04:12:55,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 04:12:55,872 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 04:12:55,881 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 18 proven. 25 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2020-10-29 04:12:55,882 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [330453616] [2020-10-29 04:12:55,882 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 04:12:55,882 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-29 04:12:55,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017035149] [2020-10-29 04:12:55,883 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-29 04:12:55,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 04:12:55,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-29 04:12:55,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-29 04:12:55,884 INFO L87 Difference]: Start difference. First operand 136 states and 147 transitions. Second operand 14 states. [2020-10-29 04:12:56,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 04:12:56,993 INFO L93 Difference]: Finished difference Result 204 states and 217 transitions. [2020-10-29 04:12:56,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-29 04:12:56,996 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 67 [2020-10-29 04:12:56,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 04:12:56,998 INFO L225 Difference]: With dead ends: 204 [2020-10-29 04:12:56,998 INFO L226 Difference]: Without dead ends: 147 [2020-10-29 04:12:57,001 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=155, Invalid=495, Unknown=0, NotChecked=0, Total=650 [2020-10-29 04:12:57,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-10-29 04:12:57,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 129. [2020-10-29 04:12:57,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-10-29 04:12:57,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 135 transitions. [2020-10-29 04:12:57,028 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 135 transitions. Word has length 67 [2020-10-29 04:12:57,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 04:12:57,028 INFO L481 AbstractCegarLoop]: Abstraction has 129 states and 135 transitions. [2020-10-29 04:12:57,028 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-29 04:12:57,028 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 135 transitions. [2020-10-29 04:12:57,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-29 04:12:57,029 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 04:12:57,029 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 04:12:57,029 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-29 04:12:57,030 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 04:12:57,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 04:12:57,030 INFO L82 PathProgramCache]: Analyzing trace with hash -160429070, now seen corresponding path program 7 times [2020-10-29 04:12:57,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 04:12:57,031 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [35590846] [2020-10-29 04:12:57,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 04:12:57,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:12:57,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:12:57,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:12:58,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:12:59,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:13:00,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:13:02,087 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:13:02,088 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-29 04:13:02,088 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 04:13:02,088 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-29 04:13:02,088 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:13:02,088 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:13:02,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-29 04:13:02,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 04:13:02,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 67 [2020-10-29 04:13:02,089 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 04:13:02,634 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 39 [2020-10-29 04:13:02,824 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 40 [2020-10-29 04:13:03,355 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 41 [2020-10-29 04:13:04,009 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 04:13:04,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:13:04,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:13:04,017 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:13:04,017 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 04:13:04,017 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 04:13:04,017 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 04:13:04,017 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:13:04,017 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:13:04,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 04:13:04,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 04:13:04,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 04:13:04,018 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 04:13:04,020 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-10-29 04:13:04,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:13:04,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:13:04,025 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:13:04,026 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 04:13:04,026 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 04:13:04,026 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 04:13:04,026 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:13:04,026 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:13:04,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 04:13:04,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 04:13:04,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-29 04:13:04,026 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 04:13:04,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-10-29 04:13:04,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:13:04,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:13:04,032 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:13:04,032 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 04:13:04,032 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 04:13:04,032 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 04:13:04,032 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:13:04,032 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:13:04,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 04:13:04,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 04:13:04,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-29 04:13:04,033 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 04:13:04,065 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 4 proven. 54 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-10-29 04:13:04,065 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [35590846] [2020-10-29 04:13:04,065 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 04:13:04,065 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-29 04:13:04,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423152562] [2020-10-29 04:13:04,066 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-29 04:13:04,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 04:13:04,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-29 04:13:04,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=469, Unknown=0, NotChecked=0, Total=552 [2020-10-29 04:13:04,067 INFO L87 Difference]: Start difference. First operand 129 states and 135 transitions. Second operand 24 states. [2020-10-29 04:13:05,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 04:13:05,628 INFO L93 Difference]: Finished difference Result 146 states and 153 transitions. [2020-10-29 04:13:05,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-29 04:13:05,628 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 69 [2020-10-29 04:13:05,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 04:13:05,630 INFO L225 Difference]: With dead ends: 146 [2020-10-29 04:13:05,632 INFO L226 Difference]: Without dead ends: 141 [2020-10-29 04:13:05,633 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 7 SyntacticMatches, 7 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=133, Invalid=859, Unknown=0, NotChecked=0, Total=992 [2020-10-29 04:13:05,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-10-29 04:13:05,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 131. [2020-10-29 04:13:05,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-10-29 04:13:05,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 136 transitions. [2020-10-29 04:13:05,665 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 136 transitions. Word has length 69 [2020-10-29 04:13:05,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 04:13:05,666 INFO L481 AbstractCegarLoop]: Abstraction has 131 states and 136 transitions. [2020-10-29 04:13:05,666 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-29 04:13:05,666 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 136 transitions. [2020-10-29 04:13:05,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-29 04:13:05,666 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 04:13:05,667 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 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] [2020-10-29 04:13:05,667 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-29 04:13:05,667 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 04:13:05,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 04:13:05,668 INFO L82 PathProgramCache]: Analyzing trace with hash -1133935535, now seen corresponding path program 8 times [2020-10-29 04:13:05,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 04:13:05,668 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1496850794] [2020-10-29 04:13:05,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 04:13:05,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:13:05,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:13:07,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:13:08,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:13:11,191 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:13:11,191 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-29 04:13:11,192 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 04:13:11,192 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5449 [2020-10-29 04:13:11,192 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:13:11,192 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:13:11,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-29 04:13:11,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 04:13:11,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-29 04:13:11,192 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 04:13:12,832 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 04:13:12,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:13:12,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:13:12,843 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:13:12,843 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 04:13:12,844 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 04:13:12,844 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 04:13:12,844 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:13:12,844 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:13:12,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 04:13:12,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 04:13:12,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 04:13:12,844 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 04:13:12,846 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-10-29 04:13:12,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:13:12,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:13:12,850 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:13:12,850 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 04:13:12,851 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 04:13:12,851 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 04:13:12,851 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:13:12,851 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:13:12,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 04:13:12,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 04:13:12,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-29 04:13:12,851 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 04:13:12,887 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 6 proven. 61 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2020-10-29 04:13:12,888 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1496850794] [2020-10-29 04:13:12,888 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 04:13:12,888 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-29 04:13:12,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944863187] [2020-10-29 04:13:12,889 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-29 04:13:12,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 04:13:12,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-29 04:13:12,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2020-10-29 04:13:12,895 INFO L87 Difference]: Start difference. First operand 131 states and 136 transitions. Second operand 24 states. [2020-10-29 04:13:14,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 04:13:14,173 INFO L93 Difference]: Finished difference Result 148 states and 154 transitions. [2020-10-29 04:13:14,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-29 04:13:14,174 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 69 [2020-10-29 04:13:14,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 04:13:14,176 INFO L225 Difference]: With dead ends: 148 [2020-10-29 04:13:14,176 INFO L226 Difference]: Without dead ends: 145 [2020-10-29 04:13:14,177 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 7 SyntacticMatches, 9 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=135, Invalid=795, Unknown=0, NotChecked=0, Total=930 [2020-10-29 04:13:14,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-10-29 04:13:14,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 139. [2020-10-29 04:13:14,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-29 04:13:14,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 144 transitions. [2020-10-29 04:13:14,206 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 144 transitions. Word has length 69 [2020-10-29 04:13:14,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 04:13:14,206 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 144 transitions. [2020-10-29 04:13:14,206 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-29 04:13:14,206 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 144 transitions. [2020-10-29 04:13:14,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-29 04:13:14,207 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 04:13:14,208 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 04:13:14,208 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-29 04:13:14,208 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 04:13:14,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 04:13:14,208 INFO L82 PathProgramCache]: Analyzing trace with hash 1518480667, now seen corresponding path program 9 times [2020-10-29 04:13:14,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 04:13:14,209 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1926416581] [2020-10-29 04:13:14,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 04:13:14,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:13:14,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:13:15,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:13:15,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:13:16,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:13:19,293 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:13:19,293 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-29 04:13:19,293 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 04:13:19,294 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5023 [2020-10-29 04:13:19,294 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:13:19,294 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:13:19,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-29 04:13:19,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 04:13:19,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-10-29 04:13:19,294 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 04:13:20,812 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 04:13:20,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:13:20,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:13:20,819 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:13:20,819 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 04:13:20,820 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 04:13:20,820 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 04:13:20,820 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:13:20,820 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:13:20,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 04:13:20,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 04:13:20,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 04:13:20,820 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 04:13:20,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-10-29 04:13:20,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:13:20,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:13:20,826 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:13:20,827 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 04:13:20,827 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 04:13:20,827 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 04:13:20,827 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:13:20,827 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:13:20,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 04:13:20,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 04:13:20,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-29 04:13:20,827 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 04:13:20,829 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-10-29 04:13:20,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:13:20,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:13:20,833 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:13:20,833 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 04:13:20,833 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 04:13:20,833 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 04:13:20,833 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:13:20,833 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:13:20,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 04:13:20,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 04:13:20,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-29 04:13:20,834 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 04:13:20,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-10-29 04:13:20,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:13:20,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:13:20,839 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:13:20,839 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 04:13:20,839 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 04:13:20,839 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 04:13:20,839 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:13:20,839 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:13:20,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 04:13:20,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 04:13:20,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-29 04:13:20,840 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 04:13:20,877 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 6 proven. 66 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-10-29 04:13:20,877 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1926416581] [2020-10-29 04:13:20,877 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 04:13:20,878 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-29 04:13:20,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919278765] [2020-10-29 04:13:20,878 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-29 04:13:20,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 04:13:20,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-29 04:13:20,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=561, Unknown=0, NotChecked=0, Total=650 [2020-10-29 04:13:20,879 INFO L87 Difference]: Start difference. First operand 139 states and 144 transitions. Second operand 26 states. [2020-10-29 04:13:22,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 04:13:22,646 INFO L93 Difference]: Finished difference Result 152 states and 158 transitions. [2020-10-29 04:13:22,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-29 04:13:22,647 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 77 [2020-10-29 04:13:22,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 04:13:22,649 INFO L225 Difference]: With dead ends: 152 [2020-10-29 04:13:22,649 INFO L226 Difference]: Without dead ends: 90 [2020-10-29 04:13:22,650 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 9 SyntacticMatches, 6 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=136, Invalid=986, Unknown=0, NotChecked=0, Total=1122 [2020-10-29 04:13:22,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-29 04:13:22,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 80. [2020-10-29 04:13:22,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-29 04:13:22,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 84 transitions. [2020-10-29 04:13:22,666 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 84 transitions. Word has length 77 [2020-10-29 04:13:22,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 04:13:22,666 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 84 transitions. [2020-10-29 04:13:22,666 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-29 04:13:22,666 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 84 transitions. [2020-10-29 04:13:22,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-29 04:13:22,667 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 04:13:22,667 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 04:13:22,667 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-29 04:13:22,667 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 04:13:22,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 04:13:22,668 INFO L82 PathProgramCache]: Analyzing trace with hash 820565626, now seen corresponding path program 10 times [2020-10-29 04:13:22,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 04:13:22,668 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [201817246] [2020-10-29 04:13:22,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 04:13:22,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:13:22,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:13:23,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:13:25,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:13:27,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:13:28,990 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:13:28,990 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-29 04:13:28,990 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 04:13:28,990 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6276 [2020-10-29 04:13:28,991 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:13:28,991 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:13:28,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-29 04:13:28,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 04:13:28,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-29 04:13:28,991 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 04:13:30,625 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 04:13:30,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:13:30,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:13:30,631 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:13:30,631 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 04:13:30,631 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 04:13:30,632 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 04:13:30,632 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:13:30,632 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:13:30,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 04:13:30,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 04:13:30,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 04:13:30,633 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 04:13:30,635 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-10-29 04:13:30,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:13:30,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:13:30,641 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:13:30,641 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 04:13:30,642 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 04:13:30,642 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 04:13:30,642 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:13:30,642 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:13:30,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 04:13:30,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 04:13:30,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-29 04:13:30,643 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 04:13:30,644 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-10-29 04:13:30,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:13:30,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:13:30,651 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:13:30,651 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 04:13:30,651 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 04:13:30,651 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 04:13:30,651 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:13:30,651 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:13:30,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 04:13:30,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 04:13:30,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-29 04:13:30,652 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 04:13:30,708 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 4 proven. 77 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-10-29 04:13:30,709 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [201817246] [2020-10-29 04:13:30,709 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 04:13:30,709 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-29 04:13:30,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205202402] [2020-10-29 04:13:30,709 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-29 04:13:30,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 04:13:30,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-29 04:13:30,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=556, Unknown=0, NotChecked=0, Total=650 [2020-10-29 04:13:30,711 INFO L87 Difference]: Start difference. First operand 80 states and 84 transitions. Second operand 26 states. [2020-10-29 04:13:32,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 04:13:32,162 INFO L93 Difference]: Finished difference Result 93 states and 97 transitions. [2020-10-29 04:13:32,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-29 04:13:32,163 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 77 [2020-10-29 04:13:32,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 04:13:32,164 INFO L225 Difference]: With dead ends: 93 [2020-10-29 04:13:32,164 INFO L226 Difference]: Without dead ends: 90 [2020-10-29 04:13:32,165 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 9 SyntacticMatches, 8 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=131, Invalid=861, Unknown=0, NotChecked=0, Total=992 [2020-10-29 04:13:32,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-29 04:13:32,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 88. [2020-10-29 04:13:32,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-29 04:13:32,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 92 transitions. [2020-10-29 04:13:32,179 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 92 transitions. Word has length 77 [2020-10-29 04:13:32,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 04:13:32,179 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 92 transitions. [2020-10-29 04:13:32,179 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-29 04:13:32,180 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 92 transitions. [2020-10-29 04:13:32,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-29 04:13:32,180 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 04:13:32,181 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 04:13:32,181 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-29 04:13:32,181 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 04:13:32,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 04:13:32,181 INFO L82 PathProgramCache]: Analyzing trace with hash 1626075043, now seen corresponding path program 11 times [2020-10-29 04:13:32,182 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 04:13:32,182 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1861442156] [2020-10-29 04:13:32,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 04:13:32,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:13:32,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:13:33,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:13:35,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:13:36,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:13:37,312 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:13:37,312 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-29 04:13:37,312 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 04:13:37,312 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5086 [2020-10-29 04:13:37,313 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:13:37,313 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:13:37,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-29 04:13:37,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 04:13:37,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 85 [2020-10-29 04:13:37,313 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 04:13:38,456 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 55 [2020-10-29 04:13:38,612 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 50 [2020-10-29 04:13:38,896 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 64 [2020-10-29 04:13:39,177 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 64 [2020-10-29 04:13:39,494 WARN L193 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 65 [2020-10-29 04:13:39,731 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 59 [2020-10-29 04:13:40,020 WARN L193 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 72 [2020-10-29 04:13:40,353 WARN L193 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 83 [2020-10-29 04:13:40,590 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 62 [2020-10-29 04:13:40,855 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 61 [2020-10-29 04:13:41,140 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 60 [2020-10-29 04:13:41,398 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 53 [2020-10-29 04:13:41,590 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 47 [2020-10-29 04:13:42,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 04:13:42,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:13:42,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:13:42,670 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:13:42,670 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 04:13:42,670 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 04:13:42,670 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 04:13:42,670 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:13:42,670 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:13:42,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 04:13:42,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 04:13:42,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 04:13:42,671 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 04:13:42,673 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-10-29 04:13:42,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:13:42,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:13:42,679 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:13:42,680 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 04:13:42,680 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 04:13:42,680 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 04:13:42,680 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:13:42,680 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:13:42,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 04:13:42,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 04:13:42,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-29 04:13:42,681 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 04:13:42,682 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-10-29 04:13:42,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:13:42,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:13:42,688 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:13:42,688 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 04:13:42,688 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 04:13:42,688 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 04:13:42,688 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:13:42,689 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:13:42,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 04:13:42,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 04:13:42,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-29 04:13:42,689 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 04:13:42,691 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2020-10-29 04:13:42,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:13:42,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:13:42,697 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:13:42,697 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 04:13:42,697 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 04:13:42,697 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 04:13:42,698 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:13:42,698 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:13:42,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 04:13:42,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 04:13:42,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-29 04:13:42,698 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 04:13:42,771 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 6 proven. 91 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2020-10-29 04:13:42,771 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1861442156] [2020-10-29 04:13:42,771 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 04:13:42,771 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-29 04:13:42,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719406074] [2020-10-29 04:13:42,772 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-29 04:13:42,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 04:13:42,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-29 04:13:42,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=1046, Unknown=0, NotChecked=0, Total=1190 [2020-10-29 04:13:42,773 INFO L87 Difference]: Start difference. First operand 88 states and 92 transitions. Second operand 35 states. [2020-10-29 04:13:43,040 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 38 [2020-10-29 04:13:43,239 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 35 [2020-10-29 04:13:43,476 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 36 [2020-10-29 04:13:43,720 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 36 [2020-10-29 04:13:43,969 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 36 [2020-10-29 04:13:44,279 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 66 [2020-10-29 04:13:44,931 WARN L193 SmtUtils]: Spent 538.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 113 [2020-10-29 04:13:45,182 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 45 [2020-10-29 04:13:45,448 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 46 [2020-10-29 04:13:45,728 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 46 [2020-10-29 04:13:46,078 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 40 [2020-10-29 04:13:46,489 WARN L193 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 80 [2020-10-29 04:13:47,005 WARN L193 SmtUtils]: Spent 377.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 99 [2020-10-29 04:13:47,305 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 65 [2020-10-29 04:13:47,972 WARN L193 SmtUtils]: Spent 535.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 109 [2020-10-29 04:13:48,316 WARN L193 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 84 [2020-10-29 04:13:48,960 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 70 [2020-10-29 04:13:49,583 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 41 [2020-10-29 04:13:49,876 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 43 [2020-10-29 04:13:50,168 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 37 [2020-10-29 04:13:50,615 WARN L193 SmtUtils]: Spent 332.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 77 [2020-10-29 04:13:51,086 WARN L193 SmtUtils]: Spent 370.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 69 [2020-10-29 04:13:51,410 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 75 [2020-10-29 04:13:52,521 WARN L193 SmtUtils]: Spent 989.00 ms on a formula simplification. DAG size of input: 166 DAG size of output: 134 [2020-10-29 04:13:52,775 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 63 [2020-10-29 04:13:53,076 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 70 [2020-10-29 04:13:53,340 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 62 [2020-10-29 04:13:53,709 WARN L193 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 73 [2020-10-29 04:13:54,251 WARN L193 SmtUtils]: Spent 437.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 120 [2020-10-29 04:13:54,643 WARN L193 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 72 [2020-10-29 04:13:55,055 WARN L193 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 73 [2020-10-29 04:13:55,551 WARN L193 SmtUtils]: Spent 359.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 75 [2020-10-29 04:13:56,094 WARN L193 SmtUtils]: Spent 381.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 77 [2020-10-29 04:13:56,504 WARN L193 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 65 [2020-10-29 04:13:56,873 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 37 [2020-10-29 04:13:57,367 WARN L193 SmtUtils]: Spent 357.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 72 [2020-10-29 04:13:57,910 WARN L193 SmtUtils]: Spent 421.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 89 [2020-10-29 04:13:58,144 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 44 [2020-10-29 04:13:58,466 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 69 [2020-10-29 04:13:59,203 WARN L193 SmtUtils]: Spent 608.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 113 [2020-10-29 04:13:59,753 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 38 [2020-10-29 04:14:00,415 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 39 [2020-10-29 04:14:00,963 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 39 [2020-10-29 04:14:01,587 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 43 [2020-10-29 04:14:02,529 WARN L193 SmtUtils]: Spent 466.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 96 [2020-10-29 04:14:03,156 WARN L193 SmtUtils]: Spent 321.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 72 [2020-10-29 04:14:03,743 WARN L193 SmtUtils]: Spent 456.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 87 [2020-10-29 04:14:04,253 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 76 [2020-10-29 04:14:04,659 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 62 [2020-10-29 04:14:04,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 04:14:04,926 INFO L93 Difference]: Finished difference Result 157 states and 175 transitions. [2020-10-29 04:14:04,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2020-10-29 04:14:04,930 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 85 [2020-10-29 04:14:04,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 04:14:04,932 INFO L225 Difference]: With dead ends: 157 [2020-10-29 04:14:04,932 INFO L226 Difference]: Without dead ends: 154 [2020-10-29 04:14:04,935 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2509 ImplicationChecksByTransitivity, 23.3s TimeCoverageRelationStatistics Valid=1208, Invalid=7912, Unknown=0, NotChecked=0, Total=9120 [2020-10-29 04:14:04,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-10-29 04:14:04,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 125. [2020-10-29 04:14:04,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-10-29 04:14:04,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 136 transitions. [2020-10-29 04:14:04,967 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 136 transitions. Word has length 85 [2020-10-29 04:14:04,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 04:14:04,967 INFO L481 AbstractCegarLoop]: Abstraction has 125 states and 136 transitions. [2020-10-29 04:14:04,967 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-29 04:14:04,967 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 136 transitions. [2020-10-29 04:14:04,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-10-29 04:14:04,969 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 04:14:04,969 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 04:14:04,969 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-29 04:14:04,969 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 04:14:04,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 04:14:04,970 INFO L82 PathProgramCache]: Analyzing trace with hash -2051766617, now seen corresponding path program 12 times [2020-10-29 04:14:04,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 04:14:04,970 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [133255976] [2020-10-29 04:14:04,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 04:14:04,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:14:05,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:14:05,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:14:05,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:14:05,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:14:10,002 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:14:10,002 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 105 [2020-10-29 04:14:10,002 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 04:14:10,002 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-29 04:14:10,002 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:14:10,003 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:14:10,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-29 04:14:10,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-29 04:14:10,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-29 04:14:10,003 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 04:14:10,216 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 04:14:10,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:14:10,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:14:10,222 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:14:10,222 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 04:14:10,222 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 04:14:10,222 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 04:14:10,223 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:14:10,223 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:14:10,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 04:14:10,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 04:14:10,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 04:14:10,223 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 04:14:10,225 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2020-10-29 04:14:10,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:14:10,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:14:10,228 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:14:10,228 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 04:14:10,228 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 04:14:10,228 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 04:14:10,228 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:14:10,229 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:14:10,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 04:14:10,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-29 04:14:10,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 04:14:10,229 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 04:14:10,230 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2020-10-29 04:14:10,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:14:10,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:14:10,232 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:14:10,232 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 04:14:10,232 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 04:14:10,233 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-29 04:14:10,233 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:14:10,233 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:14:10,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 04:14:10,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-29 04:14:10,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 04:14:10,233 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 04:14:10,234 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2020-10-29 04:14:10,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:14:10,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:14:10,236 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:14:10,236 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 04:14:10,236 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 04:14:10,236 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 04:14:10,236 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:14:10,237 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:14:10,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 04:14:10,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-29 04:14:10,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 04:14:10,237 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 04:14:10,244 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 53 proven. 25 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2020-10-29 04:14:10,244 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [133255976] [2020-10-29 04:14:10,244 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 04:14:10,244 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-29 04:14:10,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64093209] [2020-10-29 04:14:10,245 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-29 04:14:10,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 04:14:10,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-29 04:14:10,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2020-10-29 04:14:10,245 INFO L87 Difference]: Start difference. First operand 125 states and 136 transitions. Second operand 16 states. [2020-10-29 04:14:11,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 04:14:11,291 INFO L93 Difference]: Finished difference Result 341 states and 375 transitions. [2020-10-29 04:14:11,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-29 04:14:11,292 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 89 [2020-10-29 04:14:11,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 04:14:11,294 INFO L225 Difference]: With dead ends: 341 [2020-10-29 04:14:11,294 INFO L226 Difference]: Without dead ends: 241 [2020-10-29 04:14:11,294 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=123, Invalid=383, Unknown=0, NotChecked=0, Total=506 [2020-10-29 04:14:11,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2020-10-29 04:14:11,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 221. [2020-10-29 04:14:11,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 221 states. [2020-10-29 04:14:11,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 239 transitions. [2020-10-29 04:14:11,345 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 239 transitions. Word has length 89 [2020-10-29 04:14:11,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 04:14:11,345 INFO L481 AbstractCegarLoop]: Abstraction has 221 states and 239 transitions. [2020-10-29 04:14:11,345 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-29 04:14:11,345 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 239 transitions. [2020-10-29 04:14:11,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-10-29 04:14:11,347 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 04:14:11,347 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 04:14:11,347 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-29 04:14:11,347 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 04:14:11,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 04:14:11,348 INFO L82 PathProgramCache]: Analyzing trace with hash 1270599628, now seen corresponding path program 13 times [2020-10-29 04:14:11,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 04:14:11,348 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1932153552] [2020-10-29 04:14:11,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 04:14:11,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:14:11,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:14:12,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:14:13,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:14:15,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:14:16,444 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:14:16,444 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 111 [2020-10-29 04:14:16,444 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 04:14:16,445 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5048 [2020-10-29 04:14:16,445 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:14:16,445 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:14:16,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-29 04:14:16,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 04:14:16,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 95 [2020-10-29 04:14:16,445 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 04:14:19,728 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 42 [2020-10-29 04:14:19,877 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 47 [2020-10-29 04:14:20,008 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 39 [2020-10-29 04:14:20,224 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 55 [2020-10-29 04:14:20,924 WARN L193 SmtUtils]: Spent 566.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 60 [2020-10-29 04:14:22,958 WARN L193 SmtUtils]: Spent 1.53 s on a formula simplification. DAG size of input: 306 DAG size of output: 66 [2020-10-29 04:14:27,278 WARN L193 SmtUtils]: Spent 2.93 s on a formula simplification. DAG size of input: 335 DAG size of output: 74 [2020-10-29 04:14:29,981 WARN L193 SmtUtils]: Spent 1.24 s on a formula simplification. DAG size of input: 208 DAG size of output: 81 [2020-10-29 04:14:31,463 WARN L193 SmtUtils]: Spent 1.07 s on a formula simplification. DAG size of input: 202 DAG size of output: 80 [2020-10-29 04:14:33,123 WARN L193 SmtUtils]: Spent 1.22 s on a formula simplification. DAG size of input: 208 DAG size of output: 80 [2020-10-29 04:14:34,531 WARN L193 SmtUtils]: Spent 1.04 s on a formula simplification. DAG size of input: 206 DAG size of output: 78