/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=DEEPEST --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/loop-acceleration/array_3-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 20:11:32,504 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 20:11:32,509 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 20:11:32,569 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 20:11:32,570 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 20:11:32,577 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 20:11:32,580 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 20:11:32,585 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 20:11:32,589 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 20:11:32,595 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 20:11:32,596 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 20:11:32,598 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 20:11:32,598 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 20:11:32,602 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 20:11:32,605 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 20:11:32,608 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 20:11:32,617 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 20:11:32,620 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 20:11:32,628 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 20:11:32,637 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 20:11:32,640 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 20:11:32,641 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 20:11:32,643 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 20:11:32,645 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 20:11:32,654 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 20:11:32,654 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 20:11:32,655 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 20:11:32,657 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 20:11:32,658 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 20:11:32,659 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 20:11:32,659 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 20:11:32,660 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 20:11:32,662 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 20:11:32,663 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 20:11:32,664 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 20:11:32,664 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 20:11:32,665 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 20:11:32,665 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 20:11:32,665 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 20:11:32,666 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 20:11:32,667 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 20:11:32,675 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-27 20:11:32,712 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 20:11:32,712 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 20:11:32,714 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 20:11:32,714 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 20:11:32,714 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 20:11:32,715 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 20:11:32,715 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 20:11:32,715 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 20:11:32,715 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 20:11:32,715 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 20:11:32,716 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 20:11:32,716 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 20:11:32,716 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 20:11:32,716 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 20:11:32,716 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 20:11:32,717 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 20:11:32,717 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 20:11:32,717 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 20:11:32,717 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 20:11:32,717 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 20:11:32,717 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 20:11:32,718 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 20:11:32,718 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 20:11:32,718 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 20:11:32,718 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 20:11:32,718 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 20:11:32,719 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 20:11:32,719 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 20:11:32,719 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 20:11:32,719 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 20:11:33,104 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 20:11:33,143 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 20:11:33,149 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 20:11:33,151 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 20:11:33,152 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 20:11:33,154 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/array_3-2.i [2020-10-27 20:11:33,237 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6fcbbaf59/2ce03c6dbb7c414a909c083c5e2b4c99/FLAG2c94f7337 [2020-10-27 20:11:34,002 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 20:11:34,003 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-acceleration/array_3-2.i [2020-10-27 20:11:34,011 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6fcbbaf59/2ce03c6dbb7c414a909c083c5e2b4c99/FLAG2c94f7337 [2020-10-27 20:11:34,348 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6fcbbaf59/2ce03c6dbb7c414a909c083c5e2b4c99 [2020-10-27 20:11:34,355 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 20:11:34,363 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 20:11:34,369 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 20:11:34,370 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 20:11:34,374 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 20:11:34,375 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 08:11:34" (1/1) ... [2020-10-27 20:11:34,380 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1d5fdc73 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:11:34, skipping insertion in model container [2020-10-27 20:11:34,380 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 08:11:34" (1/1) ... [2020-10-27 20:11:34,389 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 20:11:34,408 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 20:11:34,600 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 20:11:34,610 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 20:11:34,628 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 20:11:34,644 INFO L208 MainTranslator]: Completed translation [2020-10-27 20:11:34,645 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:11:34 WrapperNode [2020-10-27 20:11:34,645 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 20:11:34,647 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 20:11:34,647 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 20:11:34,647 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 20:11:34,661 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:11:34" (1/1) ... [2020-10-27 20:11:34,662 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:11:34" (1/1) ... [2020-10-27 20:11:34,670 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:11:34" (1/1) ... [2020-10-27 20:11:34,670 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:11:34" (1/1) ... [2020-10-27 20:11:34,678 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:11:34" (1/1) ... [2020-10-27 20:11:34,683 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:11:34" (1/1) ... [2020-10-27 20:11:34,684 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:11:34" (1/1) ... [2020-10-27 20:11:34,687 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 20:11:34,688 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 20:11:34,688 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 20:11:34,688 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 20:11:34,689 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:11:34" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 20:11:34,769 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 20:11:34,769 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 20:11:34,769 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 20:11:34,769 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-27 20:11:34,769 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 20:11:34,770 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 20:11:34,770 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 20:11:34,770 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-27 20:11:34,770 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-27 20:11:34,770 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 20:11:34,770 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 20:11:34,771 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-27 20:11:34,771 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 20:11:34,771 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 20:11:34,771 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 20:11:34,771 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 20:11:34,771 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 20:11:34,772 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 20:11:34,772 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 20:11:34,772 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 20:11:35,041 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 20:11:35,042 INFO L298 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-27 20:11:35,044 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 08:11:35 BoogieIcfgContainer [2020-10-27 20:11:35,044 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 20:11:35,047 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 20:11:35,047 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 20:11:35,051 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 20:11:35,052 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 08:11:34" (1/3) ... [2020-10-27 20:11:35,053 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2acb5c1e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 08:11:35, skipping insertion in model container [2020-10-27 20:11:35,053 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:11:34" (2/3) ... [2020-10-27 20:11:35,053 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2acb5c1e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 08:11:35, skipping insertion in model container [2020-10-27 20:11:35,054 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 08:11:35" (3/3) ... [2020-10-27 20:11:35,055 INFO L111 eAbstractionObserver]: Analyzing ICFG array_3-2.i [2020-10-27 20:11:35,071 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 20:11:35,078 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 20:11:35,104 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 20:11:35,142 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 20:11:35,143 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 20:11:35,143 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 20:11:35,143 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 20:11:35,144 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 20:11:35,144 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 20:11:35,144 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 20:11:35,144 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 20:11:35,167 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states. [2020-10-27 20:11:35,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-27 20:11:35,201 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:11:35,202 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:11:35,202 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:11:35,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:11:35,209 INFO L82 PathProgramCache]: Analyzing trace with hash 132345573, now seen corresponding path program 1 times [2020-10-27 20:11:35,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:11:35,220 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [548166639] [2020-10-27 20:11:35,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:11:35,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:11:35,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:35,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:35,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:35,859 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:11:35,859 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-27 20:11:35,860 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:11:35,860 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 468 [2020-10-27 20:11:35,863 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:11:35,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:11:35,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 20:11:35,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:11:35,864 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 20:11:35,935 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:11:35,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:11:35,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:35,952 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:11:35,953 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:11:35,953 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:11:35,953 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 20:11:35,953 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:11:35,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:11:35,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:11:35,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:11:35,954 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:11:35,964 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:11:35,965 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [548166639] [2020-10-27 20:11:35,967 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:11:35,967 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-27 20:11:35,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678303662] [2020-10-27 20:11:35,980 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-27 20:11:35,981 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:11:36,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-27 20:11:36,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-27 20:11:36,013 INFO L87 Difference]: Start difference. First operand 30 states. Second operand 3 states. [2020-10-27 20:11:36,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:11:36,171 INFO L93 Difference]: Finished difference Result 49 states and 61 transitions. [2020-10-27 20:11:36,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-27 20:11:36,173 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2020-10-27 20:11:36,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:11:36,182 INFO L225 Difference]: With dead ends: 49 [2020-10-27 20:11:36,183 INFO L226 Difference]: Without dead ends: 20 [2020-10-27 20:11:36,189 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-27 20:11:36,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-10-27 20:11:36,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-10-27 20:11:36,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-27 20:11:36,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2020-10-27 20:11:36,253 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 15 [2020-10-27 20:11:36,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:11:36,254 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2020-10-27 20:11:36,255 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-27 20:11:36,255 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2020-10-27 20:11:36,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-27 20:11:36,258 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:11:36,258 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:11:36,258 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 20:11:36,258 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:11:36,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:11:36,260 INFO L82 PathProgramCache]: Analyzing trace with hash -1718892012, now seen corresponding path program 1 times [2020-10-27 20:11:36,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:11:36,261 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [664292141] [2020-10-27 20:11:36,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:11:36,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:11:36,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:36,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:36,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:36,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:37,073 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:11:37,074 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-27 20:11:37,074 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 20:11:37,074 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 771 [2020-10-27 20:11:37,075 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:11:37,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 20:11:37,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:11:37,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-27 20:11:37,076 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:11:37,126 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:11:37,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:11:37,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:37,135 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:11:37,136 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:11:37,136 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:11:37,136 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 20:11:37,136 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:11:37,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:11:37,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:11:37,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:11:37,137 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:11:37,143 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:11:37,144 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [664292141] [2020-10-27 20:11:37,144 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:11:37,144 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 20:11:37,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922592087] [2020-10-27 20:11:37,146 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 20:11:37,147 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:11:37,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 20:11:37,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 20:11:37,148 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 5 states. [2020-10-27 20:11:37,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:11:37,251 INFO L93 Difference]: Finished difference Result 39 states and 45 transitions. [2020-10-27 20:11:37,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 20:11:37,252 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2020-10-27 20:11:37,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:11:37,255 INFO L225 Difference]: With dead ends: 39 [2020-10-27 20:11:37,255 INFO L226 Difference]: Without dead ends: 27 [2020-10-27 20:11:37,256 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 20:11:37,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-27 20:11:37,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 23. [2020-10-27 20:11:37,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-27 20:11:37,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2020-10-27 20:11:37,266 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 17 [2020-10-27 20:11:37,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:11:37,266 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2020-10-27 20:11:37,266 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 20:11:37,266 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2020-10-27 20:11:37,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-27 20:11:37,267 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:11:37,267 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:11:37,268 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 20:11:37,268 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:11:37,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:11:37,269 INFO L82 PathProgramCache]: Analyzing trace with hash -1229937996, now seen corresponding path program 1 times [2020-10-27 20:11:37,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:11:37,269 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [356394073] [2020-10-27 20:11:37,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:11:37,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:11:37,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:37,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:37,541 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:11:37,542 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-27 20:11:37,542 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:11:37,542 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 259 [2020-10-27 20:11:37,543 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:11:37,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 20:11:37,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-27 20:11:37,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-27 20:11:37,543 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:11:37,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:11:37,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:11:37,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:37,638 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:11:37,639 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:11:37,639 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:11:37,639 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 20:11:37,639 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:11:37,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:11:37,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:11:37,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:11:37,640 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:11:37,646 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 20:11:37,646 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [356394073] [2020-10-27 20:11:37,647 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:11:37,647 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 20:11:37,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393476897] [2020-10-27 20:11:37,648 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 20:11:37,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:11:37,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 20:11:37,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 20:11:37,652 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 6 states. [2020-10-27 20:11:37,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:11:37,796 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2020-10-27 20:11:37,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 20:11:37,796 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2020-10-27 20:11:37,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:11:37,797 INFO L225 Difference]: With dead ends: 33 [2020-10-27 20:11:37,798 INFO L226 Difference]: Without dead ends: 26 [2020-10-27 20:11:37,798 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-27 20:11:37,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-10-27 20:11:37,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2020-10-27 20:11:37,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-27 20:11:37,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2020-10-27 20:11:37,805 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 19 [2020-10-27 20:11:37,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:11:37,806 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2020-10-27 20:11:37,806 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 20:11:37,806 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2020-10-27 20:11:37,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-27 20:11:37,807 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:11:37,807 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:11:37,808 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 20:11:37,808 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:11:37,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:11:37,809 INFO L82 PathProgramCache]: Analyzing trace with hash -798022867, now seen corresponding path program 1 times [2020-10-27 20:11:37,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:11:37,809 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [724527095] [2020-10-27 20:11:37,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:11:37,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:11:37,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:37,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:37,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:37,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:38,842 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:11:38,842 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-27 20:11:38,843 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 20:11:38,843 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1023 [2020-10-27 20:11:38,843 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:11:38,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 20:11:38,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-27 20:11:38,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 20:11:38,844 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:11:38,898 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:11:38,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:11:38,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:38,907 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:11:38,907 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:11:38,907 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:11:38,908 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 20:11:38,908 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:11:38,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:11:38,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:11:38,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:11:38,909 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:11:38,913 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 20:11:38,914 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [724527095] [2020-10-27 20:11:38,914 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:11:38,914 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 20:11:38,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508091133] [2020-10-27 20:11:38,915 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 20:11:38,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:11:38,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 20:11:38,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-27 20:11:38,917 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 6 states. [2020-10-27 20:11:39,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:11:39,028 INFO L93 Difference]: Finished difference Result 48 states and 54 transitions. [2020-10-27 20:11:39,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 20:11:39,029 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 23 [2020-10-27 20:11:39,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:11:39,030 INFO L225 Difference]: With dead ends: 48 [2020-10-27 20:11:39,030 INFO L226 Difference]: Without dead ends: 33 [2020-10-27 20:11:39,031 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-10-27 20:11:39,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-27 20:11:39,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 29. [2020-10-27 20:11:39,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-27 20:11:39,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2020-10-27 20:11:39,039 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 23 [2020-10-27 20:11:39,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:11:39,039 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2020-10-27 20:11:39,039 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 20:11:39,039 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2020-10-27 20:11:39,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-27 20:11:39,040 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:11:39,040 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:11:39,041 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 20:11:39,041 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:11:39,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:11:39,042 INFO L82 PathProgramCache]: Analyzing trace with hash -932168371, now seen corresponding path program 1 times [2020-10-27 20:11:39,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:11:39,042 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [733395468] [2020-10-27 20:11:39,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:11:39,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:11:39,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:39,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:39,452 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:11:39,452 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-27 20:11:39,452 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:11:39,452 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 397 [2020-10-27 20:11:39,453 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:11:39,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 20:11:39,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-27 20:11:39,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-27 20:11:39,453 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:11:39,533 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:11:39,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:11:39,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:39,549 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:11:39,549 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:11:39,549 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:11:39,549 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 20:11:39,550 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:11:39,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:11:39,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:11:39,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:11:39,550 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:11:39,555 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-27 20:11:39,556 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [733395468] [2020-10-27 20:11:39,556 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:11:39,557 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 20:11:39,557 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190438466] [2020-10-27 20:11:39,558 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 20:11:39,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:11:39,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 20:11:39,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-27 20:11:39,560 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand 7 states. [2020-10-27 20:11:39,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:11:39,748 INFO L93 Difference]: Finished difference Result 39 states and 41 transitions. [2020-10-27 20:11:39,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 20:11:39,748 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2020-10-27 20:11:39,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:11:39,749 INFO L225 Difference]: With dead ends: 39 [2020-10-27 20:11:39,750 INFO L226 Difference]: Without dead ends: 32 [2020-10-27 20:11:39,751 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-10-27 20:11:39,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-27 20:11:39,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2020-10-27 20:11:39,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-27 20:11:39,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2020-10-27 20:11:39,771 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 25 [2020-10-27 20:11:39,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:11:39,771 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2020-10-27 20:11:39,771 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 20:11:39,772 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2020-10-27 20:11:39,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-27 20:11:39,776 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:11:39,776 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:11:39,776 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 20:11:39,776 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:11:39,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:11:39,777 INFO L82 PathProgramCache]: Analyzing trace with hash 1832765766, now seen corresponding path program 2 times [2020-10-27 20:11:39,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:11:39,778 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [298324652] [2020-10-27 20:11:39,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:11:39,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:11:39,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:39,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:39,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:39,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:41,173 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:11:41,174 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-27 20:11:41,174 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 20:11:41,174 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1379 [2020-10-27 20:11:41,174 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:11:41,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 20:11:41,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-27 20:11:41,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-27 20:11:41,175 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:11:41,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:11:41,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:11:41,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:41,269 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:11:41,269 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:11:41,270 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:11:41,270 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:11:41,270 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:11:41,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:11:41,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:11:41,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:11:41,273 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 20:11:41,280 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-27 20:11:41,280 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [298324652] [2020-10-27 20:11:41,281 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:11:41,282 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 20:11:41,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689439634] [2020-10-27 20:11:41,283 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 20:11:41,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:11:41,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 20:11:41,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 20:11:41,286 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 7 states. [2020-10-27 20:11:41,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:11:41,435 INFO L93 Difference]: Finished difference Result 58 states and 64 transitions. [2020-10-27 20:11:41,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 20:11:41,436 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 29 [2020-10-27 20:11:41,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:11:41,437 INFO L225 Difference]: With dead ends: 58 [2020-10-27 20:11:41,437 INFO L226 Difference]: Without dead ends: 39 [2020-10-27 20:11:41,439 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-10-27 20:11:41,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-27 20:11:41,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 35. [2020-10-27 20:11:41,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-27 20:11:41,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2020-10-27 20:11:41,449 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 29 [2020-10-27 20:11:41,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:11:41,449 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2020-10-27 20:11:41,449 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 20:11:41,450 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2020-10-27 20:11:41,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-27 20:11:41,450 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:11:41,451 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:11:41,451 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 20:11:41,451 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:11:41,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:11:41,452 INFO L82 PathProgramCache]: Analyzing trace with hash -1824258842, now seen corresponding path program 2 times [2020-10-27 20:11:41,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:11:41,452 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [14497568] [2020-10-27 20:11:41,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:11:41,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:11:41,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:41,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:42,011 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:11:42,011 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-27 20:11:42,012 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:11:42,012 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 530 [2020-10-27 20:11:42,012 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:11:42,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 20:11:42,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-27 20:11:42,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-27 20:11:42,013 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:11:42,079 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:11:42,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:11:42,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:42,084 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:11:42,085 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:11:42,085 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:11:42,085 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:11:42,085 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:11:42,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:11:42,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:11:42,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:11:42,086 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:11:42,089 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-27 20:11:42,090 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [14497568] [2020-10-27 20:11:42,090 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:11:42,090 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 20:11:42,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647386033] [2020-10-27 20:11:42,091 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 20:11:42,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:11:42,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 20:11:42,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-27 20:11:42,092 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand 8 states. [2020-10-27 20:11:42,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:11:42,248 INFO L93 Difference]: Finished difference Result 45 states and 47 transitions. [2020-10-27 20:11:42,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 20:11:42,249 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 31 [2020-10-27 20:11:42,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:11:42,250 INFO L225 Difference]: With dead ends: 45 [2020-10-27 20:11:42,250 INFO L226 Difference]: Without dead ends: 38 [2020-10-27 20:11:42,250 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-10-27 20:11:42,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-27 20:11:42,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2020-10-27 20:11:42,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-27 20:11:42,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2020-10-27 20:11:42,257 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 31 [2020-10-27 20:11:42,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:11:42,257 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2020-10-27 20:11:42,257 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 20:11:42,257 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2020-10-27 20:11:42,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-27 20:11:42,258 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:11:42,258 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:11:42,259 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 20:11:42,259 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:11:42,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:11:42,259 INFO L82 PathProgramCache]: Analyzing trace with hash -1824383905, now seen corresponding path program 3 times [2020-10-27 20:11:42,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:11:42,260 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1360506987] [2020-10-27 20:11:42,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:11:42,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:11:42,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:42,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:42,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:42,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:43,977 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:11:43,977 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-27 20:11:43,977 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 20:11:43,978 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1704 [2020-10-27 20:11:43,978 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:11:43,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 20:11:43,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-27 20:11:43,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-27 20:11:43,978 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:11:44,048 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:11:44,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:11:44,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:44,054 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:11:44,054 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:11:44,054 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:11:44,054 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:11:44,054 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:11:44,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:11:44,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:11:44,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:11:44,055 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:11:44,059 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-27 20:11:44,060 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1360506987] [2020-10-27 20:11:44,060 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:11:44,060 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 20:11:44,060 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952113055] [2020-10-27 20:11:44,061 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 20:11:44,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:11:44,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 20:11:44,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-27 20:11:44,062 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand 9 states. [2020-10-27 20:11:44,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:11:44,220 INFO L93 Difference]: Finished difference Result 70 states and 76 transitions. [2020-10-27 20:11:44,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 20:11:44,220 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 35 [2020-10-27 20:11:44,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:11:44,221 INFO L225 Difference]: With dead ends: 70 [2020-10-27 20:11:44,221 INFO L226 Difference]: Without dead ends: 44 [2020-10-27 20:11:44,222 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-10-27 20:11:44,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-27 20:11:44,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 42. [2020-10-27 20:11:44,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-27 20:11:44,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 45 transitions. [2020-10-27 20:11:44,228 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 45 transitions. Word has length 35 [2020-10-27 20:11:44,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:11:44,229 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 45 transitions. [2020-10-27 20:11:44,229 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 20:11:44,229 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 45 transitions. [2020-10-27 20:11:44,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-27 20:11:44,230 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:11:44,230 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:11:44,230 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 20:11:44,231 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:11:44,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:11:44,231 INFO L82 PathProgramCache]: Analyzing trace with hash -758003914, now seen corresponding path program 4 times [2020-10-27 20:11:44,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:11:44,231 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1428865587] [2020-10-27 20:11:44,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:11:44,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:11:44,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:44,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:44,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:44,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:44,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:45,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:49,251 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:11:49,251 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-27 20:11:49,251 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 20:11:49,252 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-27 20:11:49,252 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:11:49,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 20:11:49,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 35 [2020-10-27 20:11:49,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 20:11:49,253 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:11:49,311 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:11:49,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:11:49,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:49,317 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:11:49,318 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:11:49,318 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:11:49,318 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:11:49,318 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:11:49,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:11:49,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:11:49,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:11:49,320 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 20:11:49,327 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2020-10-27 20:11:49,327 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1428865587] [2020-10-27 20:11:49,327 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:11:49,327 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 20:11:49,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574048584] [2020-10-27 20:11:49,329 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 20:11:49,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:11:49,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 20:11:49,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 20:11:49,336 INFO L87 Difference]: Start difference. First operand 42 states and 45 transitions. Second operand 4 states. [2020-10-27 20:11:49,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:11:49,392 INFO L93 Difference]: Finished difference Result 55 states and 60 transitions. [2020-10-27 20:11:49,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 20:11:49,392 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 41 [2020-10-27 20:11:49,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:11:49,393 INFO L225 Difference]: With dead ends: 55 [2020-10-27 20:11:49,393 INFO L226 Difference]: Without dead ends: 43 [2020-10-27 20:11:49,395 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 20:11:49,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-27 20:11:49,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2020-10-27 20:11:49,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-27 20:11:49,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 45 transitions. [2020-10-27 20:11:49,408 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 45 transitions. Word has length 41 [2020-10-27 20:11:49,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:11:49,408 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 45 transitions. [2020-10-27 20:11:49,408 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 20:11:49,408 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 45 transitions. [2020-10-27 20:11:49,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-27 20:11:49,409 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:11:49,409 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:11:49,410 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 20:11:49,410 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:11:49,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:11:49,412 INFO L82 PathProgramCache]: Analyzing trace with hash -1016169352, now seen corresponding path program 5 times [2020-10-27 20:11:49,412 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:11:49,413 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1402488821] [2020-10-27 20:11:49,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:11:49,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:11:49,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:49,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:49,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:49,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:52,100 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:11:52,101 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-27 20:11:52,101 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 20:11:52,101 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2669 [2020-10-27 20:11:52,101 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:11:52,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 20:11:52,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-27 20:11:52,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-27 20:11:52,102 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:11:52,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:11:52,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:11:52,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:52,231 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:11:52,231 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:11:52,231 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:11:52,231 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:11:52,232 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:11:52,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:11:52,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:11:52,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:11:52,232 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:11:52,242 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-27 20:11:52,242 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1402488821] [2020-10-27 20:11:52,242 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:11:52,243 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 20:11:52,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752994639] [2020-10-27 20:11:52,244 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 20:11:52,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:11:52,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 20:11:52,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-10-27 20:11:52,245 INFO L87 Difference]: Start difference. First operand 43 states and 45 transitions. Second operand 10 states. [2020-10-27 20:11:52,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:11:52,430 INFO L93 Difference]: Finished difference Result 83 states and 89 transitions. [2020-10-27 20:11:52,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 20:11:52,430 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 41 [2020-10-27 20:11:52,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:11:52,433 INFO L225 Difference]: With dead ends: 83 [2020-10-27 20:11:52,433 INFO L226 Difference]: Without dead ends: 51 [2020-10-27 20:11:52,434 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-10-27 20:11:52,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-27 20:11:52,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 49. [2020-10-27 20:11:52,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-27 20:11:52,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 51 transitions. [2020-10-27 20:11:52,444 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 51 transitions. Word has length 41 [2020-10-27 20:11:52,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:11:52,444 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 51 transitions. [2020-10-27 20:11:52,444 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 20:11:52,444 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 51 transitions. [2020-10-27 20:11:52,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-27 20:11:52,445 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:11:52,445 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:11:52,445 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 20:11:52,446 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:11:52,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:11:52,448 INFO L82 PathProgramCache]: Analyzing trace with hash 106776977, now seen corresponding path program 6 times [2020-10-27 20:11:52,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:11:52,448 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1010548150] [2020-10-27 20:11:52,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:11:52,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:11:52,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:52,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:52,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:52,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:56,378 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:11:56,379 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-27 20:11:56,379 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 20:11:56,379 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3912 [2020-10-27 20:11:56,379 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:11:56,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 20:11:56,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-27 20:11:56,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-27 20:11:56,380 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:11:56,501 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:11:56,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:11:56,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:56,514 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:11:56,514 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:11:56,515 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:11:56,515 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 20:11:56,518 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:11:56,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:11:56,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:11:56,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:11:56,519 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:11:56,530 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-27 20:11:56,530 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1010548150] [2020-10-27 20:11:56,531 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:11:56,531 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 20:11:56,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148559767] [2020-10-27 20:11:56,532 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 20:11:56,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:11:56,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 20:11:56,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-10-27 20:11:56,533 INFO L87 Difference]: Start difference. First operand 49 states and 51 transitions. Second operand 11 states. [2020-10-27 20:11:56,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:11:56,724 INFO L93 Difference]: Finished difference Result 93 states and 99 transitions. [2020-10-27 20:11:56,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 20:11:56,724 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 47 [2020-10-27 20:11:56,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:11:56,725 INFO L225 Difference]: With dead ends: 93 [2020-10-27 20:11:56,725 INFO L226 Difference]: Without dead ends: 57 [2020-10-27 20:11:56,728 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-10-27 20:11:56,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-27 20:11:56,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 55. [2020-10-27 20:11:56,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-27 20:11:56,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 57 transitions. [2020-10-27 20:11:56,742 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 57 transitions. Word has length 47 [2020-10-27 20:11:56,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:11:56,743 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 57 transitions. [2020-10-27 20:11:56,743 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 20:11:56,743 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 57 transitions. [2020-10-27 20:11:56,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-27 20:11:56,744 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:11:56,746 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:11:56,746 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 20:11:56,746 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:11:56,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:11:56,747 INFO L82 PathProgramCache]: Analyzing trace with hash -1773083734, now seen corresponding path program 7 times [2020-10-27 20:11:56,748 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:11:56,748 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1502927583] [2020-10-27 20:11:56,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:11:56,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:11:56,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:56,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:56,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:57,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:12:00,482 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:12:00,482 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-27 20:12:00,482 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 20:12:00,484 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3705 [2020-10-27 20:12:00,485 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:12:00,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 20:12:00,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-27 20:12:00,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-27 20:12:00,485 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:12:00,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:12:00,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:12:00,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:12:00,657 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:12:00,657 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:12:00,657 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:12:00,657 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:12:00,657 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:12:00,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:12:00,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:12:00,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:12:00,658 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:12:00,667 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-27 20:12:00,667 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1502927583] [2020-10-27 20:12:00,667 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:12:00,668 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 20:12:00,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681031776] [2020-10-27 20:12:00,668 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 20:12:00,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:12:00,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 20:12:00,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-10-27 20:12:00,670 INFO L87 Difference]: Start difference. First operand 55 states and 57 transitions. Second operand 12 states. [2020-10-27 20:12:00,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:12:00,861 INFO L93 Difference]: Finished difference Result 103 states and 109 transitions. [2020-10-27 20:12:00,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 20:12:00,861 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 53 [2020-10-27 20:12:00,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:12:00,862 INFO L225 Difference]: With dead ends: 103 [2020-10-27 20:12:00,862 INFO L226 Difference]: Without dead ends: 63 [2020-10-27 20:12:00,863 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2020-10-27 20:12:00,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-27 20:12:00,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 61. [2020-10-27 20:12:00,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-27 20:12:00,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 63 transitions. [2020-10-27 20:12:00,873 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 63 transitions. Word has length 53 [2020-10-27 20:12:00,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:12:00,874 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 63 transitions. [2020-10-27 20:12:00,874 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 20:12:00,874 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 63 transitions. [2020-10-27 20:12:00,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-27 20:12:00,877 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:12:00,877 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:12:00,878 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 20:12:00,878 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:12:00,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:12:00,878 INFO L82 PathProgramCache]: Analyzing trace with hash 154380995, now seen corresponding path program 8 times [2020-10-27 20:12:00,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:12:00,879 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1871976539] [2020-10-27 20:12:00,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:12:00,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:12:00,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:12:00,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:12:01,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:12:02,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:12:05,106 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:12:05,107 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-27 20:12:05,107 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 20:12:05,107 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4204 [2020-10-27 20:12:05,107 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:12:05,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 20:12:05,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-27 20:12:05,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-27 20:12:05,108 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:12:05,248 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:12:05,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:12:05,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:12:05,255 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:12:05,255 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:12:05,255 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:12:05,255 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:12:05,256 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:12:05,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:12:05,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:12:05,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:12:05,256 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:12:05,263 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-10-27 20:12:05,264 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1871976539] [2020-10-27 20:12:05,264 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:12:05,264 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 20:12:05,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398759314] [2020-10-27 20:12:05,265 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 20:12:05,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:12:05,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 20:12:05,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-27 20:12:05,266 INFO L87 Difference]: Start difference. First operand 61 states and 63 transitions. Second operand 13 states. [2020-10-27 20:12:05,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:12:05,502 INFO L93 Difference]: Finished difference Result 113 states and 119 transitions. [2020-10-27 20:12:05,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 20:12:05,503 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 59 [2020-10-27 20:12:05,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:12:05,504 INFO L225 Difference]: With dead ends: 113 [2020-10-27 20:12:05,504 INFO L226 Difference]: Without dead ends: 69 [2020-10-27 20:12:05,505 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2020-10-27 20:12:05,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-27 20:12:05,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 67. [2020-10-27 20:12:05,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-27 20:12:05,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 69 transitions. [2020-10-27 20:12:05,511 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 69 transitions. Word has length 59 [2020-10-27 20:12:05,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:12:05,511 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 69 transitions. [2020-10-27 20:12:05,511 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 20:12:05,511 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 69 transitions. [2020-10-27 20:12:05,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-27 20:12:05,512 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:12:05,512 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:12:05,513 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 20:12:05,513 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:12:05,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:12:05,513 INFO L82 PathProgramCache]: Analyzing trace with hash -90702116, now seen corresponding path program 9 times [2020-10-27 20:12:05,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:12:05,514 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1771129409] [2020-10-27 20:12:05,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:12:05,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:12:05,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:12:05,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:12:05,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:12:07,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:12:10,539 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:12:10,540 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-27 20:12:10,540 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 20:12:10,540 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-27 20:12:10,540 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:12:10,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 20:12:10,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-27 20:12:10,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-27 20:12:10,541 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:12:10,670 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:12:10,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:12:10,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:12:10,676 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:12:10,676 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:12:10,676 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:12:10,676 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:12:10,677 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:12:10,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:12:10,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:12:10,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:12:10,677 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:12:10,686 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 8 proven. 128 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-10-27 20:12:10,686 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1771129409] [2020-10-27 20:12:10,687 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:12:10,687 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 20:12:10,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828048322] [2020-10-27 20:12:10,688 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 20:12:10,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:12:10,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 20:12:10,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2020-10-27 20:12:10,689 INFO L87 Difference]: Start difference. First operand 67 states and 69 transitions. Second operand 13 states. [2020-10-27 20:12:10,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:12:10,995 INFO L93 Difference]: Finished difference Result 120 states and 126 transitions. [2020-10-27 20:12:10,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-27 20:12:10,995 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 65 [2020-10-27 20:12:10,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:12:10,996 INFO L225 Difference]: With dead ends: 120 [2020-10-27 20:12:10,996 INFO L226 Difference]: Without dead ends: 76 [2020-10-27 20:12:10,997 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=167, Invalid=295, Unknown=0, NotChecked=0, Total=462 [2020-10-27 20:12:10,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-27 20:12:11,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 72. [2020-10-27 20:12:11,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-27 20:12:11,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 74 transitions. [2020-10-27 20:12:11,003 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 74 transitions. Word has length 65 [2020-10-27 20:12:11,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:12:11,003 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 74 transitions. [2020-10-27 20:12:11,003 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 20:12:11,003 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 74 transitions. [2020-10-27 20:12:11,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-27 20:12:11,004 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:12:11,004 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:12:11,005 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 20:12:11,005 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:12:11,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:12:11,005 INFO L82 PathProgramCache]: Analyzing trace with hash -1034460292, now seen corresponding path program 3 times [2020-10-27 20:12:11,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:12:11,006 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2051667462] [2020-10-27 20:12:11,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:12:11,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:12:11,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:12:11,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:12:12,708 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:12:12,709 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-27 20:12:12,709 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:12:12,709 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1687 [2020-10-27 20:12:12,709 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:12:12,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 20:12:12,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-27 20:12:12,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-27 20:12:12,709 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:12:12,876 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:12:12,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:12:12,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:12:12,881 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:12:12,881 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:12:12,881 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:12:12,881 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:12:12,881 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:12:12,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:12:12,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:12:12,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:12:12,882 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:12:12,888 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-10-27 20:12:12,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2051667462] [2020-10-27 20:12:12,890 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:12:12,890 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 20:12:12,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221875260] [2020-10-27 20:12:12,891 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 20:12:12,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:12:12,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 20:12:12,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2020-10-27 20:12:12,892 INFO L87 Difference]: Start difference. First operand 72 states and 74 transitions. Second operand 14 states. [2020-10-27 20:12:13,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:12:13,230 INFO L93 Difference]: Finished difference Result 82 states and 84 transitions. [2020-10-27 20:12:13,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 20:12:13,231 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 67 [2020-10-27 20:12:13,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:12:13,232 INFO L225 Difference]: With dead ends: 82 [2020-10-27 20:12:13,232 INFO L226 Difference]: Without dead ends: 75 [2020-10-27 20:12:13,234 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2020-10-27 20:12:13,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-27 20:12:13,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 73. [2020-10-27 20:12:13,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-27 20:12:13,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 75 transitions. [2020-10-27 20:12:13,254 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 75 transitions. Word has length 67 [2020-10-27 20:12:13,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:12:13,254 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 75 transitions. [2020-10-27 20:12:13,254 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 20:12:13,255 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 75 transitions. [2020-10-27 20:12:13,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-27 20:12:13,256 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:12:13,259 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:12:13,260 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 20:12:13,260 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:12:13,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:12:13,261 INFO L82 PathProgramCache]: Analyzing trace with hash 901267445, now seen corresponding path program 10 times [2020-10-27 20:12:13,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:12:13,262 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1147913690] [2020-10-27 20:12:13,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:12:13,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:12:13,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:12:13,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:12:13,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:12:15,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:12:18,305 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:12:18,306 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-27 20:12:18,306 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 20:12:18,306 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-27 20:12:18,306 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:12:18,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 20:12:18,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-27 20:12:18,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-27 20:12:18,306 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:12:18,488 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:12:18,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:12:18,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:12:18,494 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:12:18,494 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:12:18,495 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:12:18,495 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:12:18,495 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:12:18,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:12:18,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:12:18,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:12:18,496 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:12:18,511 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-10-27 20:12:18,512 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1147913690] [2020-10-27 20:12:18,512 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:12:18,512 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 20:12:18,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453353146] [2020-10-27 20:12:18,513 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 20:12:18,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:12:18,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 20:12:18,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2020-10-27 20:12:18,514 INFO L87 Difference]: Start difference. First operand 73 states and 75 transitions. Second operand 15 states. [2020-10-27 20:12:18,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:12:18,877 INFO L93 Difference]: Finished difference Result 133 states and 139 transitions. [2020-10-27 20:12:18,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 20:12:18,877 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 71 [2020-10-27 20:12:18,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:12:18,878 INFO L225 Difference]: With dead ends: 133 [2020-10-27 20:12:18,879 INFO L226 Difference]: Without dead ends: 81 [2020-10-27 20:12:18,880 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2020-10-27 20:12:18,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-27 20:12:18,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 79. [2020-10-27 20:12:18,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-27 20:12:18,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 81 transitions. [2020-10-27 20:12:18,885 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 81 transitions. Word has length 71 [2020-10-27 20:12:18,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:12:18,885 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 81 transitions. [2020-10-27 20:12:18,885 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 20:12:18,885 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 81 transitions. [2020-10-27 20:12:18,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-27 20:12:18,886 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:12:18,886 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:12:18,886 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-27 20:12:18,887 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:12:18,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:12:18,887 INFO L82 PathProgramCache]: Analyzing trace with hash 1601621518, now seen corresponding path program 11 times [2020-10-27 20:12:18,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:12:18,887 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [348798079] [2020-10-27 20:12:18,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:12:18,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:12:18,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:12:18,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:12:19,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:12:21,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:12:23,915 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:12:23,915 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-27 20:12:23,915 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 20:12:23,915 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-27 20:12:23,915 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:12:23,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 20:12:23,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-27 20:12:23,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-27 20:12:23,915 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:12:24,116 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:12:24,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:12:24,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:12:24,122 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:12:24,122 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:12:24,122 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:12:24,122 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:12:24,123 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:12:24,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:12:24,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:12:24,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:12:24,123 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:12:24,134 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-10-27 20:12:24,134 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [348798079] [2020-10-27 20:12:24,134 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:12:24,134 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 20:12:24,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102168127] [2020-10-27 20:12:24,135 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 20:12:24,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:12:24,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 20:12:24,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2020-10-27 20:12:24,136 INFO L87 Difference]: Start difference. First operand 79 states and 81 transitions. Second operand 16 states. [2020-10-27 20:12:24,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:12:24,407 INFO L93 Difference]: Finished difference Result 143 states and 149 transitions. [2020-10-27 20:12:24,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 20:12:24,408 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 77 [2020-10-27 20:12:24,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:12:24,409 INFO L225 Difference]: With dead ends: 143 [2020-10-27 20:12:24,409 INFO L226 Difference]: Without dead ends: 87 [2020-10-27 20:12:24,410 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=94, Invalid=212, Unknown=0, NotChecked=0, Total=306 [2020-10-27 20:12:24,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-27 20:12:24,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 85. [2020-10-27 20:12:24,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-27 20:12:24,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 87 transitions. [2020-10-27 20:12:24,414 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 87 transitions. Word has length 77 [2020-10-27 20:12:24,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:12:24,414 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 87 transitions. [2020-10-27 20:12:24,414 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 20:12:24,414 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 87 transitions. [2020-10-27 20:12:24,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-27 20:12:24,415 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:12:24,415 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:12:24,415 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-27 20:12:24,416 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:12:24,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:12:24,416 INFO L82 PathProgramCache]: Analyzing trace with hash 543033639, now seen corresponding path program 12 times [2020-10-27 20:12:24,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:12:24,416 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [851404550] [2020-10-27 20:12:24,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:12:24,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:12:24,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:12:24,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:12:24,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:12:27,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:12:29,436 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:12:29,437 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-27 20:12:29,437 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 20:12:29,437 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-27 20:12:29,437 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:12:29,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 20:12:29,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 35 [2020-10-27 20:12:29,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-27 20:12:29,437 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:12:29,653 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:12:29,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:12:29,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:12:29,658 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:12:29,658 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:12:29,659 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:12:29,659 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:12:29,659 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:12:29,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:12:29,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:12:29,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:12:29,659 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:12:29,671 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2020-10-27 20:12:29,671 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [851404550] [2020-10-27 20:12:29,671 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:12:29,671 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-27 20:12:29,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367598665] [2020-10-27 20:12:29,672 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-27 20:12:29,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:12:29,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-27 20:12:29,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=175, Unknown=0, NotChecked=0, Total=272 [2020-10-27 20:12:29,673 INFO L87 Difference]: Start difference. First operand 85 states and 87 transitions. Second operand 17 states. [2020-10-27 20:12:29,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:12:29,927 INFO L93 Difference]: Finished difference Result 153 states and 159 transitions. [2020-10-27 20:12:29,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 20:12:29,928 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 83 [2020-10-27 20:12:29,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:12:29,928 INFO L225 Difference]: With dead ends: 153 [2020-10-27 20:12:29,928 INFO L226 Difference]: Without dead ends: 93 [2020-10-27 20:12:29,929 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=107, Invalid=235, Unknown=0, NotChecked=0, Total=342 [2020-10-27 20:12:29,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-27 20:12:29,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 91. [2020-10-27 20:12:29,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-27 20:12:29,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 93 transitions. [2020-10-27 20:12:29,935 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 93 transitions. Word has length 83 [2020-10-27 20:12:29,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:12:29,935 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 93 transitions. [2020-10-27 20:12:29,935 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-27 20:12:29,935 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 93 transitions. [2020-10-27 20:12:29,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-10-27 20:12:29,936 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:12:29,936 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:12:29,936 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-27 20:12:29,937 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:12:29,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:12:29,937 INFO L82 PathProgramCache]: Analyzing trace with hash -828354240, now seen corresponding path program 13 times [2020-10-27 20:12:29,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:12:29,939 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1240651157] [2020-10-27 20:12:29,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:12:29,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:12:29,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:12:30,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:12:30,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:12:33,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:12:34,969 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:12:34,969 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 99 [2020-10-27 20:12:34,969 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 20:12:34,969 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-27 20:12:34,970 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:12:34,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-27 20:12:34,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 37 [2020-10-27 20:12:34,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-27 20:12:34,970 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:12:35,185 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:12:35,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:12:35,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:12:35,190 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:12:35,190 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:12:35,190 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:12:35,190 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:12:35,191 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:12:35,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:12:35,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:12:35,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:12:35,191 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:12:35,202 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2020-10-27 20:12:35,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1240651157] [2020-10-27 20:12:35,203 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:12:35,203 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-27 20:12:35,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571119675] [2020-10-27 20:12:35,203 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-27 20:12:35,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:12:35,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-27 20:12:35,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=195, Unknown=0, NotChecked=0, Total=306 [2020-10-27 20:12:35,205 INFO L87 Difference]: Start difference. First operand 91 states and 93 transitions. Second operand 18 states. [2020-10-27 20:12:35,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:12:35,469 INFO L93 Difference]: Finished difference Result 163 states and 169 transitions. [2020-10-27 20:12:35,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 20:12:35,470 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 89 [2020-10-27 20:12:35,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:12:35,470 INFO L225 Difference]: With dead ends: 163 [2020-10-27 20:12:35,471 INFO L226 Difference]: Without dead ends: 99 [2020-10-27 20:12:35,471 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=121, Invalid=259, Unknown=0, NotChecked=0, Total=380 [2020-10-27 20:12:35,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-27 20:12:35,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 97. [2020-10-27 20:12:35,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-27 20:12:35,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 99 transitions. [2020-10-27 20:12:35,476 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 99 transitions. Word has length 89 [2020-10-27 20:12:35,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:12:35,476 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 99 transitions. [2020-10-27 20:12:35,476 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-27 20:12:35,477 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 99 transitions. [2020-10-27 20:12:35,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-10-27 20:12:35,477 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:12:35,477 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:12:35,478 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-27 20:12:35,478 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:12:35,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:12:35,478 INFO L82 PathProgramCache]: Analyzing trace with hash -1743255975, now seen corresponding path program 14 times [2020-10-27 20:12:35,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:12:35,479 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1414490323] [2020-10-27 20:12:35,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:12:35,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:12:35,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:12:35,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:12:35,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:12:39,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:12:40,505 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:12:40,505 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 105 [2020-10-27 20:12:40,505 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 20:12:40,505 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-27 20:12:40,506 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:12:40,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-27 20:12:40,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 39 [2020-10-27 20:12:40,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-27 20:12:40,506 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:12:40,733 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:12:40,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:12:40,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:12:40,737 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:12:40,737 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:12:40,737 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:12:40,737 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:12:40,738 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:12:40,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:12:40,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:12:40,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:12:40,738 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:12:40,751 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 13 proven. 338 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2020-10-27 20:12:40,751 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1414490323] [2020-10-27 20:12:40,751 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:12:40,751 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-27 20:12:40,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471379473] [2020-10-27 20:12:40,752 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-27 20:12:40,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:12:40,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-27 20:12:40,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=182, Unknown=0, NotChecked=0, Total=306 [2020-10-27 20:12:40,753 INFO L87 Difference]: Start difference. First operand 97 states and 99 transitions. Second operand 18 states. [2020-10-27 20:12:41,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:12:41,263 INFO L93 Difference]: Finished difference Result 170 states and 176 transitions. [2020-10-27 20:12:41,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-27 20:12:41,263 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 95 [2020-10-27 20:12:41,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:12:41,264 INFO L225 Difference]: With dead ends: 170 [2020-10-27 20:12:41,264 INFO L226 Difference]: Without dead ends: 106 [2020-10-27 20:12:41,266 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=362, Invalid=630, Unknown=0, NotChecked=0, Total=992 [2020-10-27 20:12:41,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-27 20:12:41,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 102. [2020-10-27 20:12:41,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-27 20:12:41,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 104 transitions. [2020-10-27 20:12:41,271 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 104 transitions. Word has length 95 [2020-10-27 20:12:41,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:12:41,271 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 104 transitions. [2020-10-27 20:12:41,271 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-27 20:12:41,271 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 104 transitions. [2020-10-27 20:12:41,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-10-27 20:12:41,272 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:12:41,272 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:12:41,272 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-27 20:12:41,272 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:12:41,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:12:41,273 INFO L82 PathProgramCache]: Analyzing trace with hash 2049995385, now seen corresponding path program 4 times [2020-10-27 20:12:41,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:12:41,273 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1271364376] [2020-10-27 20:12:41,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:12:41,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:12:41,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:12:41,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:12:46,301 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:12:46,302 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 107 [2020-10-27 20:12:46,302 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:12:46,302 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-27 20:12:46,302 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:12:46,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-27 20:12:46,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 41 [2020-10-27 20:12:46,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-27 20:12:46,302 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:12:46,577 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:12:46,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:12:46,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:12:46,584 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:12:46,585 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:12:46,585 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:12:46,585 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:12:46,585 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:12:46,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:12:46,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:12:46,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:12:46,586 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:12:46,595 INFO L134 CoverageAnalysis]: Checked inductivity of 547 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2020-10-27 20:12:46,595 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1271364376] [2020-10-27 20:12:46,595 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:12:46,596 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-27 20:12:46,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407037034] [2020-10-27 20:12:46,596 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-27 20:12:46,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:12:46,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-27 20:12:46,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=216, Unknown=0, NotChecked=0, Total=342 [2020-10-27 20:12:46,598 INFO L87 Difference]: Start difference. First operand 102 states and 104 transitions. Second operand 19 states. [2020-10-27 20:12:46,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:12:46,935 INFO L93 Difference]: Finished difference Result 112 states and 114 transitions. [2020-10-27 20:12:46,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 20:12:46,935 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 97 [2020-10-27 20:12:46,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:12:46,937 INFO L225 Difference]: With dead ends: 112 [2020-10-27 20:12:46,937 INFO L226 Difference]: Without dead ends: 105 [2020-10-27 20:12:46,938 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=136, Invalid=284, Unknown=0, NotChecked=0, Total=420 [2020-10-27 20:12:46,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-27 20:12:46,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 103. [2020-10-27 20:12:46,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-10-27 20:12:46,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 105 transitions. [2020-10-27 20:12:46,946 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 105 transitions. Word has length 97 [2020-10-27 20:12:46,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:12:46,946 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 105 transitions. [2020-10-27 20:12:46,946 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-27 20:12:46,947 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 105 transitions. [2020-10-27 20:12:46,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-10-27 20:12:46,947 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:12:46,948 INFO L422 BasicCegarLoop]: trace histogram [15, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:12:46,948 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-27 20:12:46,948 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:12:46,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:12:46,948 INFO L82 PathProgramCache]: Analyzing trace with hash 742885490, now seen corresponding path program 15 times [2020-10-27 20:12:46,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:12:46,949 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1476383364] [2020-10-27 20:12:46,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:12:46,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:12:46,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:12:47,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:12:51,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:12:51,986 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:12:51,986 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 111 [2020-10-27 20:12:51,986 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:12:51,987 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-27 20:12:51,987 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:12:51,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-27 20:12:51,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 41 [2020-10-27 20:12:51,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-27 20:12:51,987 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:12:52,249 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:12:52,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:12:52,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:12:52,254 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:12:52,254 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:12:52,254 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:12:52,254 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:12:52,254 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:12:52,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:12:52,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:12:52,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:12:52,254 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:12:52,264 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 14 proven. 392 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2020-10-27 20:12:52,265 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1476383364] [2020-10-27 20:12:52,265 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:12:52,265 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-27 20:12:52,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298016731] [2020-10-27 20:12:52,266 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-27 20:12:52,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:12:52,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-27 20:12:52,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=202, Unknown=0, NotChecked=0, Total=342 [2020-10-27 20:12:52,267 INFO L87 Difference]: Start difference. First operand 103 states and 105 transitions. Second operand 19 states. [2020-10-27 20:12:52,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:12:52,812 INFO L93 Difference]: Finished difference Result 180 states and 186 transitions. [2020-10-27 20:12:52,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-27 20:12:52,815 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 101 [2020-10-27 20:12:52,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:12:52,816 INFO L225 Difference]: With dead ends: 180 [2020-10-27 20:12:52,816 INFO L226 Difference]: Without dead ends: 112 [2020-10-27 20:12:52,817 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=410, Invalid=712, Unknown=0, NotChecked=0, Total=1122 [2020-10-27 20:12:52,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-27 20:12:52,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 108. [2020-10-27 20:12:52,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-10-27 20:12:52,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 110 transitions. [2020-10-27 20:12:52,823 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 110 transitions. Word has length 101 [2020-10-27 20:12:52,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:12:52,824 INFO L481 AbstractCegarLoop]: Abstraction has 108 states and 110 transitions. [2020-10-27 20:12:52,824 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-27 20:12:52,824 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 110 transitions. [2020-10-27 20:12:52,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-10-27 20:12:52,825 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:12:52,825 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:12:52,825 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-27 20:12:52,825 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:12:52,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:12:52,826 INFO L82 PathProgramCache]: Analyzing trace with hash -836790766, now seen corresponding path program 5 times [2020-10-27 20:12:52,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:12:52,826 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2081266450] [2020-10-27 20:12:52,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:12:52,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:12:52,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:12:53,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:12:57,718 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:12:57,719 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 113 [2020-10-27 20:12:57,719 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:12:57,719 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4873 [2020-10-27 20:12:57,719 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:12:57,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-27 20:12:57,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-27 20:12:57,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-27 20:12:57,719 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:12:58,003 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:12:58,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:12:58,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:12:58,009 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:12:58,009 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:12:58,009 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:12:58,009 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:12:58,009 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:12:58,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:12:58,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:12:58,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:12:58,009 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:12:58,021 INFO L134 CoverageAnalysis]: Checked inductivity of 631 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2020-10-27 20:12:58,022 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2081266450] [2020-10-27 20:12:58,022 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:12:58,022 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-27 20:12:58,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371701221] [2020-10-27 20:12:58,023 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-27 20:12:58,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:12:58,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-27 20:12:58,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=238, Unknown=0, NotChecked=0, Total=380 [2020-10-27 20:12:58,024 INFO L87 Difference]: Start difference. First operand 108 states and 110 transitions. Second operand 20 states. [2020-10-27 20:12:58,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:12:58,412 INFO L93 Difference]: Finished difference Result 118 states and 120 transitions. [2020-10-27 20:12:58,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 20:12:58,413 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 103 [2020-10-27 20:12:58,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:12:58,414 INFO L225 Difference]: With dead ends: 118 [2020-10-27 20:12:58,415 INFO L226 Difference]: Without dead ends: 111 [2020-10-27 20:12:58,416 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=152, Invalid=310, Unknown=0, NotChecked=0, Total=462 [2020-10-27 20:12:58,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-27 20:12:58,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 109. [2020-10-27 20:12:58,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-10-27 20:12:58,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 111 transitions. [2020-10-27 20:12:58,421 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 111 transitions. Word has length 103 [2020-10-27 20:12:58,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:12:58,421 INFO L481 AbstractCegarLoop]: Abstraction has 109 states and 111 transitions. [2020-10-27 20:12:58,421 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-27 20:12:58,422 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 111 transitions. [2020-10-27 20:12:58,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-10-27 20:12:58,423 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:12:58,423 INFO L422 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:12:58,423 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-27 20:12:58,423 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:12:58,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:12:58,424 INFO L82 PathProgramCache]: Analyzing trace with hash -430360693, now seen corresponding path program 16 times [2020-10-27 20:12:58,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:12:58,424 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1312876633] [2020-10-27 20:12:58,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:12:58,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:12:58,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:12:58,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:03,459 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:13:03,460 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-27 20:13:03,460 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:13:03,460 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-27 20:13:03,460 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:13:03,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-27 20:13:03,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-27 20:13:03,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-10-27 20:13:03,460 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:13:03,762 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:13:03,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:13:03,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:03,768 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:13:03,768 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:13:03,768 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:13:03,768 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:13:03,768 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:13:03,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:13:03,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:13:03,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:13:03,769 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:13:03,782 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 15 proven. 450 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2020-10-27 20:13:03,782 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1312876633] [2020-10-27 20:13:03,782 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:13:03,783 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-27 20:13:03,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161507802] [2020-10-27 20:13:03,783 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-27 20:13:03,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:13:03,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-27 20:13:03,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=223, Unknown=0, NotChecked=0, Total=380 [2020-10-27 20:13:03,784 INFO L87 Difference]: Start difference. First operand 109 states and 111 transitions. Second operand 20 states. [2020-10-27 20:13:04,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:13:04,373 INFO L93 Difference]: Finished difference Result 190 states and 196 transitions. [2020-10-27 20:13:04,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-27 20:13:04,373 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 107 [2020-10-27 20:13:04,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:13:04,375 INFO L225 Difference]: With dead ends: 190 [2020-10-27 20:13:04,375 INFO L226 Difference]: Without dead ends: 118 [2020-10-27 20:13:04,377 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=461, Invalid=799, Unknown=0, NotChecked=0, Total=1260 [2020-10-27 20:13:04,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-27 20:13:04,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 114. [2020-10-27 20:13:04,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-10-27 20:13:04,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 116 transitions. [2020-10-27 20:13:04,382 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 116 transitions. Word has length 107 [2020-10-27 20:13:04,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:13:04,383 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 116 transitions. [2020-10-27 20:13:04,383 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-27 20:13:04,383 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 116 transitions. [2020-10-27 20:13:04,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-10-27 20:13:04,384 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:13:04,384 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:13:04,384 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-27 20:13:04,384 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:13:04,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:13:04,385 INFO L82 PathProgramCache]: Analyzing trace with hash 2064762539, now seen corresponding path program 6 times [2020-10-27 20:13:04,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:13:04,385 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1906745552] [2020-10-27 20:13:04,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:13:04,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:13:04,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:04,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:09,415 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:13:09,416 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 119 [2020-10-27 20:13:09,416 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:13:09,416 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-27 20:13:09,416 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:13:09,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-27 20:13:09,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 45 [2020-10-27 20:13:09,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 69 [2020-10-27 20:13:09,416 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:13:09,716 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:13:09,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:13:09,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:09,723 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:13:09,723 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:13:09,723 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:13:09,723 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:13:09,724 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:13:09,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:13:09,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:13:09,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:13:09,724 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:13:09,734 INFO L134 CoverageAnalysis]: Checked inductivity of 721 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2020-10-27 20:13:09,734 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1906745552] [2020-10-27 20:13:09,735 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:13:09,735 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-27 20:13:09,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397514126] [2020-10-27 20:13:09,735 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-27 20:13:09,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:13:09,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-27 20:13:09,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=261, Unknown=0, NotChecked=0, Total=420 [2020-10-27 20:13:09,736 INFO L87 Difference]: Start difference. First operand 114 states and 116 transitions. Second operand 21 states. [2020-10-27 20:13:10,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:13:10,122 INFO L93 Difference]: Finished difference Result 124 states and 126 transitions. [2020-10-27 20:13:10,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-27 20:13:10,122 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 109 [2020-10-27 20:13:10,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:13:10,124 INFO L225 Difference]: With dead ends: 124 [2020-10-27 20:13:10,124 INFO L226 Difference]: Without dead ends: 117 [2020-10-27 20:13:10,125 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=169, Invalid=337, Unknown=0, NotChecked=0, Total=506 [2020-10-27 20:13:10,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-27 20:13:10,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 115. [2020-10-27 20:13:10,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-10-27 20:13:10,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 117 transitions. [2020-10-27 20:13:10,131 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 117 transitions. Word has length 109 [2020-10-27 20:13:10,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:13:10,131 INFO L481 AbstractCegarLoop]: Abstraction has 115 states and 117 transitions. [2020-10-27 20:13:10,131 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-27 20:13:10,131 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 117 transitions. [2020-10-27 20:13:10,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-10-27 20:13:10,132 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:13:10,133 INFO L422 BasicCegarLoop]: trace histogram [17, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:13:10,133 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-27 20:13:10,133 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:13:10,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:13:10,133 INFO L82 PathProgramCache]: Analyzing trace with hash 1998549924, now seen corresponding path program 17 times [2020-10-27 20:13:10,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:13:10,134 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1752265730] [2020-10-27 20:13:10,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:13:10,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:13:10,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:10,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:10,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:11,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:15,163 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:13:15,163 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 123 [2020-10-27 20:13:15,163 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 20:13:15,163 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-27 20:13:15,163 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:13:15,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-27 20:13:15,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 45 [2020-10-27 20:13:15,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 73 [2020-10-27 20:13:15,163 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:13:15,479 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:13:15,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:13:15,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:15,485 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:13:15,485 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:13:15,485 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:13:15,486 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 20:13:15,486 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:13:15,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:13:15,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:13:15,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:13:15,486 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:13:15,499 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2020-10-27 20:13:15,499 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1752265730] [2020-10-27 20:13:15,499 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:13:15,499 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-27 20:13:15,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141493028] [2020-10-27 20:13:15,500 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-27 20:13:15,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:13:15,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-27 20:13:15,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=285, Unknown=0, NotChecked=0, Total=462 [2020-10-27 20:13:15,501 INFO L87 Difference]: Start difference. First operand 115 states and 117 transitions. Second operand 22 states. [2020-10-27 20:13:15,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:13:15,892 INFO L93 Difference]: Finished difference Result 203 states and 209 transitions. [2020-10-27 20:13:15,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-27 20:13:15,893 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 113 [2020-10-27 20:13:15,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:13:15,894 INFO L225 Difference]: With dead ends: 203 [2020-10-27 20:13:15,894 INFO L226 Difference]: Without dead ends: 123 [2020-10-27 20:13:15,894 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=187, Invalid=365, Unknown=0, NotChecked=0, Total=552 [2020-10-27 20:13:15,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-27 20:13:15,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 121. [2020-10-27 20:13:15,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-27 20:13:15,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 123 transitions. [2020-10-27 20:13:15,907 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 123 transitions. Word has length 113 [2020-10-27 20:13:15,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:13:15,908 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 123 transitions. [2020-10-27 20:13:15,908 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-27 20:13:15,908 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 123 transitions. [2020-10-27 20:13:15,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2020-10-27 20:13:15,909 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:13:15,909 INFO L422 BasicCegarLoop]: trace histogram [18, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:13:15,909 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-27 20:13:15,909 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:13:15,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:13:15,911 INFO L82 PathProgramCache]: Analyzing trace with hash 253009085, now seen corresponding path program 18 times [2020-10-27 20:13:15,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:13:15,912 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1473561085] [2020-10-27 20:13:15,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:13:15,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:13:15,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:16,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:17,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:17,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:20,935 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:13:20,935 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 129 [2020-10-27 20:13:20,935 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 20:13:20,935 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-27 20:13:20,935 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:13:20,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-27 20:13:20,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 47 [2020-10-27 20:13:20,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-10-27 20:13:20,936 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:13:21,283 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:13:21,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:13:21,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:21,288 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:13:21,288 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:13:21,288 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:13:21,288 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:13:21,289 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:13:21,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:13:21,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:13:21,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:13:21,289 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:13:21,305 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2020-10-27 20:13:21,305 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1473561085] [2020-10-27 20:13:21,305 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:13:21,306 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-27 20:13:21,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909159472] [2020-10-27 20:13:21,306 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-27 20:13:21,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:13:21,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-27 20:13:21,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=310, Unknown=0, NotChecked=0, Total=506 [2020-10-27 20:13:21,307 INFO L87 Difference]: Start difference. First operand 121 states and 123 transitions. Second operand 23 states. [2020-10-27 20:13:21,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:13:21,700 INFO L93 Difference]: Finished difference Result 213 states and 219 transitions. [2020-10-27 20:13:21,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-27 20:13:21,701 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 119 [2020-10-27 20:13:21,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:13:21,702 INFO L225 Difference]: With dead ends: 213 [2020-10-27 20:13:21,702 INFO L226 Difference]: Without dead ends: 129 [2020-10-27 20:13:21,702 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=206, Invalid=394, Unknown=0, NotChecked=0, Total=600 [2020-10-27 20:13:21,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-10-27 20:13:21,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 127. [2020-10-27 20:13:21,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-10-27 20:13:21,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 129 transitions. [2020-10-27 20:13:21,709 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 129 transitions. Word has length 119 [2020-10-27 20:13:21,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:13:21,709 INFO L481 AbstractCegarLoop]: Abstraction has 127 states and 129 transitions. [2020-10-27 20:13:21,709 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-27 20:13:21,709 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 129 transitions. [2020-10-27 20:13:21,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-10-27 20:13:21,710 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:13:21,710 INFO L422 BasicCegarLoop]: trace histogram [19, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:13:21,711 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-27 20:13:21,711 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:13:21,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:13:21,711 INFO L82 PathProgramCache]: Analyzing trace with hash 140186326, now seen corresponding path program 19 times [2020-10-27 20:13:21,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:13:21,712 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [661876388] [2020-10-27 20:13:21,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:13:21,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:13:21,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:21,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:26,746 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:13:26,746 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 135 [2020-10-27 20:13:26,746 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:13:26,746 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-27 20:13:26,746 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:13:26,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-27 20:13:26,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 49 [2020-10-27 20:13:26,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-27 20:13:26,747 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:13:27,101 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:13:27,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:13:27,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:27,106 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:13:27,106 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:13:27,106 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:13:27,106 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:13:27,107 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:13:27,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:13:27,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:13:27,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:13:27,107 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:13:27,119 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 18 proven. 648 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2020-10-27 20:13:27,120 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [661876388] [2020-10-27 20:13:27,120 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:13:27,120 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-27 20:13:27,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844155051] [2020-10-27 20:13:27,120 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-27 20:13:27,121 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:13:27,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-27 20:13:27,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=292, Unknown=0, NotChecked=0, Total=506 [2020-10-27 20:13:27,121 INFO L87 Difference]: Start difference. First operand 127 states and 129 transitions. Second operand 23 states. [2020-10-27 20:13:27,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:13:27,829 INFO L93 Difference]: Finished difference Result 220 states and 226 transitions. [2020-10-27 20:13:27,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-27 20:13:27,829 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 125 [2020-10-27 20:13:27,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:13:27,831 INFO L225 Difference]: With dead ends: 220 [2020-10-27 20:13:27,831 INFO L226 Difference]: Without dead ends: 136 [2020-10-27 20:13:27,833 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=632, Invalid=1090, Unknown=0, NotChecked=0, Total=1722 [2020-10-27 20:13:27,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-10-27 20:13:27,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 132. [2020-10-27 20:13:27,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-10-27 20:13:27,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 134 transitions. [2020-10-27 20:13:27,839 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 134 transitions. Word has length 125 [2020-10-27 20:13:27,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:13:27,840 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 134 transitions. [2020-10-27 20:13:27,840 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-27 20:13:27,840 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 134 transitions. [2020-10-27 20:13:27,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-10-27 20:13:27,841 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:13:27,841 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:13:27,841 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-27 20:13:27,841 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:13:27,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:13:27,842 INFO L82 PathProgramCache]: Analyzing trace with hash -185964938, now seen corresponding path program 7 times [2020-10-27 20:13:27,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:13:27,842 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [317915750] [2020-10-27 20:13:27,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:13:27,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:13:27,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:27,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:32,876 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:13:32,877 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 137 [2020-10-27 20:13:32,877 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:13:32,877 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-27 20:13:32,877 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:13:32,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-27 20:13:32,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 51 [2020-10-27 20:13:32,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-27 20:13:32,877 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:13:33,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:13:33,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:13:33,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:33,247 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:13:33,248 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:13:33,248 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:13:33,248 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:13:33,248 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:13:33,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:13:33,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:13:33,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:13:33,248 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:13:33,261 INFO L134 CoverageAnalysis]: Checked inductivity of 1027 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 361 trivial. 0 not checked. [2020-10-27 20:13:33,262 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [317915750] [2020-10-27 20:13:33,262 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:13:33,262 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-27 20:13:33,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014925600] [2020-10-27 20:13:33,262 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-27 20:13:33,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:13:33,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-27 20:13:33,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=336, Unknown=0, NotChecked=0, Total=552 [2020-10-27 20:13:33,263 INFO L87 Difference]: Start difference. First operand 132 states and 134 transitions. Second operand 24 states. [2020-10-27 20:13:33,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:13:33,646 INFO L93 Difference]: Finished difference Result 142 states and 144 transitions. [2020-10-27 20:13:33,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-27 20:13:33,646 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 127 [2020-10-27 20:13:33,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:13:33,648 INFO L225 Difference]: With dead ends: 142 [2020-10-27 20:13:33,648 INFO L226 Difference]: Without dead ends: 135 [2020-10-27 20:13:33,649 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=226, Invalid=424, Unknown=0, NotChecked=0, Total=650 [2020-10-27 20:13:33,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-10-27 20:13:33,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 133. [2020-10-27 20:13:33,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-10-27 20:13:33,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 135 transitions. [2020-10-27 20:13:33,656 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 135 transitions. Word has length 127 [2020-10-27 20:13:33,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:13:33,656 INFO L481 AbstractCegarLoop]: Abstraction has 133 states and 135 transitions. [2020-10-27 20:13:33,656 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-27 20:13:33,656 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 135 transitions. [2020-10-27 20:13:33,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-10-27 20:13:33,658 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:13:33,658 INFO L422 BasicCegarLoop]: trace histogram [20, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:13:33,658 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-27 20:13:33,658 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:13:33,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:13:33,659 INFO L82 PathProgramCache]: Analyzing trace with hash 280835567, now seen corresponding path program 20 times [2020-10-27 20:13:33,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:13:33,659 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [426535766] [2020-10-27 20:13:33,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:13:33,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:13:33,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:34,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:36,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:36,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:38,696 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:13:38,696 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 141 [2020-10-27 20:13:38,696 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 20:13:38,696 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-27 20:13:38,696 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:13:38,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-27 20:13:38,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 51 [2020-10-27 20:13:38,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 85 [2020-10-27 20:13:38,696 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:13:39,107 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:13:39,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:13:39,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:39,111 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:13:39,111 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:13:39,111 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:13:39,111 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 20:13:39,111 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:13:39,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:13:39,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:13:39,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:13:39,112 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:13:39,125 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 361 trivial. 0 not checked. [2020-10-27 20:13:39,125 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [426535766] [2020-10-27 20:13:39,126 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:13:39,126 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-27 20:13:39,126 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581889058] [2020-10-27 20:13:39,126 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-27 20:13:39,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:13:39,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-27 20:13:39,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=363, Unknown=0, NotChecked=0, Total=600 [2020-10-27 20:13:39,127 INFO L87 Difference]: Start difference. First operand 133 states and 135 transitions. Second operand 25 states. [2020-10-27 20:13:39,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:13:39,512 INFO L93 Difference]: Finished difference Result 233 states and 239 transitions. [2020-10-27 20:13:39,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-27 20:13:39,513 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 131 [2020-10-27 20:13:39,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:13:39,514 INFO L225 Difference]: With dead ends: 233 [2020-10-27 20:13:39,514 INFO L226 Difference]: Without dead ends: 141 [2020-10-27 20:13:39,515 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=247, Invalid=455, Unknown=0, NotChecked=0, Total=702 [2020-10-27 20:13:39,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-10-27 20:13:39,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 139. [2020-10-27 20:13:39,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-27 20:13:39,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 141 transitions. [2020-10-27 20:13:39,526 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 141 transitions. Word has length 131 [2020-10-27 20:13:39,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:13:39,526 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 141 transitions. [2020-10-27 20:13:39,526 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-27 20:13:39,527 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 141 transitions. [2020-10-27 20:13:39,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2020-10-27 20:13:39,531 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:13:39,531 INFO L422 BasicCegarLoop]: trace histogram [21, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:13:39,531 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-27 20:13:39,531 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:13:39,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:13:39,531 INFO L82 PathProgramCache]: Analyzing trace with hash -743610872, now seen corresponding path program 21 times [2020-10-27 20:13:39,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:13:39,532 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1297307848] [2020-10-27 20:13:39,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:13:39,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:13:39,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:39,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:44,620 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:13:44,623 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 147 [2020-10-27 20:13:44,624 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:13:44,624 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5052 [2020-10-27 20:13:44,624 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:13:44,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-27 20:13:44,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 53 [2020-10-27 20:13:44,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 83 [2020-10-27 20:13:44,628 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 20:13:45,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:13:45,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:13:45,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:45,054 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:13:45,054 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:13:45,054 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:13:45,054 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:13:45,055 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:13:45,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:13:45,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:13:45,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:13:45,055 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:13:45,070 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 20 proven. 800 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2020-10-27 20:13:45,070 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1297307848] [2020-10-27 20:13:45,071 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:13:45,071 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-27 20:13:45,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082580318] [2020-10-27 20:13:45,071 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-27 20:13:45,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:13:45,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-27 20:13:45,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=343, Unknown=0, NotChecked=0, Total=600 [2020-10-27 20:13:45,072 INFO L87 Difference]: Start difference. First operand 139 states and 141 transitions. Second operand 25 states. [2020-10-27 20:13:45,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:13:45,863 INFO L93 Difference]: Finished difference Result 240 states and 246 transitions. [2020-10-27 20:13:45,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-27 20:13:45,864 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 137 [2020-10-27 20:13:45,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:13:45,865 INFO L225 Difference]: With dead ends: 240 [2020-10-27 20:13:45,865 INFO L226 Difference]: Without dead ends: 148 [2020-10-27 20:13:45,866 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=761, Invalid=1309, Unknown=0, NotChecked=0, Total=2070 [2020-10-27 20:13:45,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-10-27 20:13:45,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 144. [2020-10-27 20:13:45,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-27 20:13:45,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 146 transitions. [2020-10-27 20:13:45,873 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 146 transitions. Word has length 137 [2020-10-27 20:13:45,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:13:45,873 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 146 transitions. [2020-10-27 20:13:45,873 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-27 20:13:45,873 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 146 transitions. [2020-10-27 20:13:45,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2020-10-27 20:13:45,874 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:13:45,874 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:13:45,875 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-27 20:13:45,875 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:13:45,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:13:45,875 INFO L82 PathProgramCache]: Analyzing trace with hash -297952088, now seen corresponding path program 8 times [2020-10-27 20:13:45,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:13:45,876 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1902423412] [2020-10-27 20:13:45,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:13:45,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:13:45,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:45,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:50,911 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:13:50,911 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 149 [2020-10-27 20:13:50,912 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:13:50,912 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-27 20:13:50,912 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:13:50,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-27 20:13:50,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 55 [2020-10-27 20:13:50,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 89 [2020-10-27 20:13:50,912 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:13:51,457 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:13:51,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:13:51,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:51,462 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:13:51,463 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:13:51,463 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:13:51,463 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:13:51,463 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:13:51,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:13:51,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:13:51,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:13:51,464 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:13:51,487 INFO L134 CoverageAnalysis]: Checked inductivity of 1261 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2020-10-27 20:13:51,488 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1902423412] [2020-10-27 20:13:51,488 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:13:51,488 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-27 20:13:51,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391063237] [2020-10-27 20:13:51,489 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-27 20:13:51,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:13:51,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-27 20:13:51,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=391, Unknown=0, NotChecked=0, Total=650 [2020-10-27 20:13:51,491 INFO L87 Difference]: Start difference. First operand 144 states and 146 transitions. Second operand 26 states. [2020-10-27 20:13:51,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:13:51,921 INFO L93 Difference]: Finished difference Result 154 states and 156 transitions. [2020-10-27 20:13:51,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-27 20:13:51,921 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 139 [2020-10-27 20:13:51,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:13:51,923 INFO L225 Difference]: With dead ends: 154 [2020-10-27 20:13:51,923 INFO L226 Difference]: Without dead ends: 147 [2020-10-27 20:13:51,924 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=269, Invalid=487, Unknown=0, NotChecked=0, Total=756 [2020-10-27 20:13:51,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-10-27 20:13:51,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 145. [2020-10-27 20:13:51,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-27 20:13:51,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 147 transitions. [2020-10-27 20:13:51,931 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 147 transitions. Word has length 139 [2020-10-27 20:13:51,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:13:51,931 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 147 transitions. [2020-10-27 20:13:51,931 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-27 20:13:51,931 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 147 transitions. [2020-10-27 20:13:51,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2020-10-27 20:13:51,932 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:13:51,932 INFO L422 BasicCegarLoop]: trace histogram [22, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:13:51,932 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-27 20:13:51,932 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:13:51,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:13:51,933 INFO L82 PathProgramCache]: Analyzing trace with hash 608568097, now seen corresponding path program 22 times [2020-10-27 20:13:51,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:13:51,933 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1389751842] [2020-10-27 20:13:51,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:13:51,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:13:51,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:52,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:54,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:55,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:56,974 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:13:56,974 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 153 [2020-10-27 20:13:56,974 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 20:13:56,975 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-27 20:13:56,975 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:13:56,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-27 20:13:56,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 55 [2020-10-27 20:13:56,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 87 [2020-10-27 20:13:56,975 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:13:57,425 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:13:57,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:13:57,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:57,429 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:13:57,429 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:13:57,429 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:13:57,429 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:13:57,430 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:13:57,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:13:57,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:13:57,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:13:57,430 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:13:57,454 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 21 proven. 882 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2020-10-27 20:13:57,455 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1389751842] [2020-10-27 20:13:57,455 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:13:57,455 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-27 20:13:57,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470680470] [2020-10-27 20:13:57,456 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-27 20:13:57,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:13:57,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-27 20:13:57,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=370, Unknown=0, NotChecked=0, Total=650 [2020-10-27 20:13:57,457 INFO L87 Difference]: Start difference. First operand 145 states and 147 transitions. Second operand 26 states. [2020-10-27 20:13:58,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:13:58,282 INFO L93 Difference]: Finished difference Result 250 states and 256 transitions. [2020-10-27 20:13:58,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-27 20:13:58,283 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 143 [2020-10-27 20:13:58,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:13:58,284 INFO L225 Difference]: With dead ends: 250 [2020-10-27 20:13:58,284 INFO L226 Difference]: Without dead ends: 154 [2020-10-27 20:13:58,286 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=830, Invalid=1426, Unknown=0, NotChecked=0, Total=2256 [2020-10-27 20:13:58,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-10-27 20:13:58,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 150. [2020-10-27 20:13:58,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-10-27 20:13:58,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 152 transitions. [2020-10-27 20:13:58,293 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 152 transitions. Word has length 143 [2020-10-27 20:13:58,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:13:58,293 INFO L481 AbstractCegarLoop]: Abstraction has 150 states and 152 transitions. [2020-10-27 20:13:58,293 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-27 20:13:58,293 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 152 transitions. [2020-10-27 20:13:58,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2020-10-27 20:13:58,294 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:13:58,294 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:13:58,295 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-27 20:13:58,295 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:13:58,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:13:58,295 INFO L82 PathProgramCache]: Analyzing trace with hash -1489765567, now seen corresponding path program 9 times [2020-10-27 20:13:58,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:13:58,296 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [90920568] [2020-10-27 20:13:58,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:13:58,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:13:58,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:59,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:14:03,330 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:14:03,331 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 155 [2020-10-27 20:14:03,331 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:14:03,331 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-27 20:14:03,331 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:14:03,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-27 20:14:03,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 57 [2020-10-27 20:14:03,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 93 [2020-10-27 20:14:03,331 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:14:03,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:14:03,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:14:03,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:14:03,843 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:14:03,843 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:14:03,843 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:14:03,843 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:14:03,843 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:14:03,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:14:03,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:14:03,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:14:03,843 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:14:03,860 INFO L134 CoverageAnalysis]: Checked inductivity of 1387 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2020-10-27 20:14:03,860 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [90920568] [2020-10-27 20:14:03,860 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:14:03,860 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-27 20:14:03,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656489721] [2020-10-27 20:14:03,861 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-27 20:14:03,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:14:03,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-27 20:14:03,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=282, Invalid=420, Unknown=0, NotChecked=0, Total=702 [2020-10-27 20:14:03,862 INFO L87 Difference]: Start difference. First operand 150 states and 152 transitions. Second operand 27 states. [2020-10-27 20:14:04,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:14:04,318 INFO L93 Difference]: Finished difference Result 160 states and 162 transitions. [2020-10-27 20:14:04,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-27 20:14:04,318 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 145 [2020-10-27 20:14:04,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:14:04,320 INFO L225 Difference]: With dead ends: 160 [2020-10-27 20:14:04,320 INFO L226 Difference]: Without dead ends: 153 [2020-10-27 20:14:04,321 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=292, Invalid=520, Unknown=0, NotChecked=0, Total=812 [2020-10-27 20:14:04,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-10-27 20:14:04,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 151. [2020-10-27 20:14:04,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2020-10-27 20:14:04,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 153 transitions. [2020-10-27 20:14:04,328 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 153 transitions. Word has length 145 [2020-10-27 20:14:04,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:14:04,328 INFO L481 AbstractCegarLoop]: Abstraction has 151 states and 153 transitions. [2020-10-27 20:14:04,328 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-27 20:14:04,328 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 153 transitions. [2020-10-27 20:14:04,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-10-27 20:14:04,329 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:14:04,329 INFO L422 BasicCegarLoop]: trace histogram [23, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:14:04,330 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-27 20:14:04,330 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:14:04,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:14:04,330 INFO L82 PathProgramCache]: Analyzing trace with hash -1488360134, now seen corresponding path program 23 times [2020-10-27 20:14:04,330 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:14:04,331 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [980765259] [2020-10-27 20:14:04,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:14:04,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:14:04,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:14:05,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:14:07,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:14:08,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:14:09,380 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:14:09,380 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 159 [2020-10-27 20:14:09,380 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 20:14:09,380 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-27 20:14:09,380 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:14:09,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-27 20:14:09,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 57 [2020-10-27 20:14:09,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 92 [2020-10-27 20:14:09,381 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:14:09,874 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:14:09,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:14:09,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:14:09,881 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:14:09,881 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:14:09,881 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:14:09,881 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:14:09,881 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:14:09,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:14:09,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:14:09,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:14:09,881 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:14:09,898 INFO L134 CoverageAnalysis]: Checked inductivity of 1474 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2020-10-27 20:14:09,899 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [980765259] [2020-10-27 20:14:09,899 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:14:09,899 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-27 20:14:09,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893525979] [2020-10-27 20:14:09,900 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-27 20:14:09,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:14:09,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-27 20:14:09,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=304, Invalid=398, Unknown=0, NotChecked=0, Total=702 [2020-10-27 20:14:09,901 INFO L87 Difference]: Start difference. First operand 151 states and 153 transitions. Second operand 27 states. [2020-10-27 20:14:10,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:14:10,745 INFO L93 Difference]: Finished difference Result 260 states and 266 transitions. [2020-10-27 20:14:10,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-27 20:14:10,746 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 149 [2020-10-27 20:14:10,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:14:10,747 INFO L225 Difference]: With dead ends: 260 [2020-10-27 20:14:10,747 INFO L226 Difference]: Without dead ends: 160 [2020-10-27 20:14:10,749 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=902, Invalid=1548, Unknown=0, NotChecked=0, Total=2450 [2020-10-27 20:14:10,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-10-27 20:14:10,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 156. [2020-10-27 20:14:10,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-10-27 20:14:10,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 158 transitions. [2020-10-27 20:14:10,756 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 158 transitions. Word has length 149 [2020-10-27 20:14:10,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:14:10,756 INFO L481 AbstractCegarLoop]: Abstraction has 156 states and 158 transitions. [2020-10-27 20:14:10,756 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-27 20:14:10,756 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 158 transitions. [2020-10-27 20:14:10,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2020-10-27 20:14:10,757 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:14:10,757 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:14:10,758 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-27 20:14:10,758 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:14:10,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:14:10,758 INFO L82 PathProgramCache]: Analyzing trace with hash 513672922, now seen corresponding path program 10 times [2020-10-27 20:14:10,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:14:10,759 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [730695109] [2020-10-27 20:14:10,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:14:10,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:14:10,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:14:11,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:14:15,861 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:14:15,862 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 161 [2020-10-27 20:14:15,862 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:14:15,862 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5078 [2020-10-27 20:14:15,862 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:14:15,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-27 20:14:15,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 59 [2020-10-27 20:14:15,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 97 [2020-10-27 20:14:15,863 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:14:16,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:14:16,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:14:16,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:14:16,402 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:14:16,402 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:14:16,402 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:14:16,402 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:14:16,402 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:14:16,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:14:16,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:14:16,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:14:16,403 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:14:16,420 INFO L134 CoverageAnalysis]: Checked inductivity of 1519 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 529 trivial. 0 not checked. [2020-10-27 20:14:16,420 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [730695109] [2020-10-27 20:14:16,421 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:14:16,421 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-27 20:14:16,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106069871] [2020-10-27 20:14:16,421 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-27 20:14:16,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:14:16,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-27 20:14:16,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=450, Unknown=0, NotChecked=0, Total=756 [2020-10-27 20:14:16,422 INFO L87 Difference]: Start difference. First operand 156 states and 158 transitions. Second operand 28 states. [2020-10-27 20:14:16,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:14:16,924 INFO L93 Difference]: Finished difference Result 166 states and 168 transitions. [2020-10-27 20:14:16,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-27 20:14:16,925 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 151 [2020-10-27 20:14:16,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:14:16,927 INFO L225 Difference]: With dead ends: 166 [2020-10-27 20:14:16,927 INFO L226 Difference]: Without dead ends: 159 [2020-10-27 20:14:16,928 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=316, Invalid=554, Unknown=0, NotChecked=0, Total=870 [2020-10-27 20:14:16,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-10-27 20:14:16,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 157. [2020-10-27 20:14:16,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-10-27 20:14:16,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 159 transitions. [2020-10-27 20:14:16,934 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 159 transitions. Word has length 151 [2020-10-27 20:14:16,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:14:16,935 INFO L481 AbstractCegarLoop]: Abstraction has 157 states and 159 transitions. [2020-10-27 20:14:16,935 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-27 20:14:16,935 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 159 transitions. [2020-10-27 20:14:16,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2020-10-27 20:14:16,936 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:14:16,936 INFO L422 BasicCegarLoop]: trace histogram [24, 23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:14:16,936 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-27 20:14:16,936 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:14:16,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:14:16,937 INFO L82 PathProgramCache]: Analyzing trace with hash -48102317, now seen corresponding path program 24 times [2020-10-27 20:14:16,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:14:16,937 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1345625928] [2020-10-27 20:14:16,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:14:16,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:14:16,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:14:17,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:14:19,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:14:21,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:14:21,968 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:14:21,969 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 165 [2020-10-27 20:14:21,969 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 20:14:21,969 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-27 20:14:21,969 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:14:21,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-27 20:14:21,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 59 [2020-10-27 20:14:21,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 96 [2020-10-27 20:14:21,969 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:14:22,487 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:14:22,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:14:22,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:14:22,492 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:14:22,493 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:14:22,493 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:14:22,493 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:14:22,493 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:14:22,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:14:22,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:14:22,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:14:22,494 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:14:22,524 INFO L134 CoverageAnalysis]: Checked inductivity of 1610 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 529 trivial. 0 not checked. [2020-10-27 20:14:22,526 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1345625928] [2020-10-27 20:14:22,526 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:14:22,526 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-27 20:14:22,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119120673] [2020-10-27 20:14:22,527 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-27 20:14:22,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:14:22,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-27 20:14:22,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=427, Unknown=0, NotChecked=0, Total=756 [2020-10-27 20:14:22,529 INFO L87 Difference]: Start difference. First operand 157 states and 159 transitions. Second operand 28 states. [2020-10-27 20:14:23,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:14:23,472 INFO L93 Difference]: Finished difference Result 270 states and 276 transitions. [2020-10-27 20:14:23,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-10-27 20:14:23,472 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 155 [2020-10-27 20:14:23,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:14:23,474 INFO L225 Difference]: With dead ends: 270 [2020-10-27 20:14:23,474 INFO L226 Difference]: Without dead ends: 166 [2020-10-27 20:14:23,476 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=977, Invalid=1675, Unknown=0, NotChecked=0, Total=2652 [2020-10-27 20:14:23,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-10-27 20:14:23,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 162. [2020-10-27 20:14:23,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-10-27 20:14:23,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 164 transitions. [2020-10-27 20:14:23,483 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 164 transitions. Word has length 155 [2020-10-27 20:14:23,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:14:23,483 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 164 transitions. [2020-10-27 20:14:23,484 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-27 20:14:23,484 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 164 transitions. [2020-10-27 20:14:23,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2020-10-27 20:14:23,485 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:14:23,485 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:14:23,485 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-27 20:14:23,485 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:14:23,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:14:23,486 INFO L82 PathProgramCache]: Analyzing trace with hash 1119756147, now seen corresponding path program 11 times [2020-10-27 20:14:23,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:14:23,486 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [35996699] [2020-10-27 20:14:23,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:14:23,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:14:23,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:14:23,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:14:28,536 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:14:28,536 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 167 [2020-10-27 20:14:28,536 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:14:28,536 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-10-27 20:14:28,536 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:14:28,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-27 20:14:28,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 61 [2020-10-27 20:14:28,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 101 [2020-10-27 20:14:28,536 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:14:29,093 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:14:29,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:14:29,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:14:29,100 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:14:29,100 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:14:29,100 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:14:29,100 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:14:29,100 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:14:29,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:14:29,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:14:29,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:14:29,101 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:14:29,131 INFO L134 CoverageAnalysis]: Checked inductivity of 1657 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 576 trivial. 0 not checked. [2020-10-27 20:14:29,131 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [35996699] [2020-10-27 20:14:29,131 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:14:29,132 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-27 20:14:29,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065545463] [2020-10-27 20:14:29,134 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-27 20:14:29,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:14:29,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-27 20:14:29,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=331, Invalid=481, Unknown=0, NotChecked=0, Total=812 [2020-10-27 20:14:29,135 INFO L87 Difference]: Start difference. First operand 162 states and 164 transitions. Second operand 29 states. [2020-10-27 20:14:29,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:14:29,593 INFO L93 Difference]: Finished difference Result 172 states and 174 transitions. [2020-10-27 20:14:29,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-27 20:14:29,593 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 157 [2020-10-27 20:14:29,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:14:29,596 INFO L225 Difference]: With dead ends: 172 [2020-10-27 20:14:29,596 INFO L226 Difference]: Without dead ends: 165 [2020-10-27 20:14:29,596 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=341, Invalid=589, Unknown=0, NotChecked=0, Total=930 [2020-10-27 20:14:29,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-10-27 20:14:29,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 163. [2020-10-27 20:14:29,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-27 20:14:29,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 165 transitions. [2020-10-27 20:14:29,603 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 165 transitions. Word has length 157 [2020-10-27 20:14:29,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:14:29,603 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 165 transitions. [2020-10-27 20:14:29,604 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-27 20:14:29,604 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 165 transitions. [2020-10-27 20:14:29,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2020-10-27 20:14:29,604 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:14:29,605 INFO L422 BasicCegarLoop]: trace histogram [25, 24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:14:29,605 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-27 20:14:29,605 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:14:29,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:14:29,606 INFO L82 PathProgramCache]: Analyzing trace with hash 1809983596, now seen corresponding path program 25 times [2020-10-27 20:14:29,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:14:29,606 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1694887335] [2020-10-27 20:14:29,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:14:29,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:14:29,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:14:30,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:14:31,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:14:34,649 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:14:34,649 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 171 [2020-10-27 20:14:34,649 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:14:34,649 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-27 20:14:34,649 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:14:34,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-27 20:14:34,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 61 [2020-10-27 20:14:34,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 99 [2020-10-27 20:14:34,649 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:14:35,187 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:14:35,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:14:35,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:14:35,192 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:14:35,192 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:14:35,192 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:14:35,192 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:14:35,192 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:14:35,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:14:35,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:14:35,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:14:35,193 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:14:35,223 INFO L134 CoverageAnalysis]: Checked inductivity of 1752 backedges. 24 proven. 1152 refuted. 0 times theorem prover too weak. 576 trivial. 0 not checked. [2020-10-27 20:14:35,223 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1694887335] [2020-10-27 20:14:35,223 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:14:35,224 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-27 20:14:35,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410551316] [2020-10-27 20:14:35,224 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-27 20:14:35,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:14:35,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-27 20:14:35,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=355, Invalid=457, Unknown=0, NotChecked=0, Total=812 [2020-10-27 20:14:35,225 INFO L87 Difference]: Start difference. First operand 163 states and 165 transitions. Second operand 29 states. [2020-10-27 20:14:36,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:14:36,147 INFO L93 Difference]: Finished difference Result 280 states and 286 transitions. [2020-10-27 20:14:36,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-10-27 20:14:36,147 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 161 [2020-10-27 20:14:36,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:14:36,149 INFO L225 Difference]: With dead ends: 280 [2020-10-27 20:14:36,149 INFO L226 Difference]: Without dead ends: 172 [2020-10-27 20:14:36,151 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1055, Invalid=1807, Unknown=0, NotChecked=0, Total=2862 [2020-10-27 20:14:36,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-10-27 20:14:36,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 168. [2020-10-27 20:14:36,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-10-27 20:14:36,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 170 transitions. [2020-10-27 20:14:36,158 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 170 transitions. Word has length 161 [2020-10-27 20:14:36,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:14:36,159 INFO L481 AbstractCegarLoop]: Abstraction has 168 states and 170 transitions. [2020-10-27 20:14:36,159 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-27 20:14:36,159 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 170 transitions. [2020-10-27 20:14:36,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2020-10-27 20:14:36,160 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:14:36,160 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:14:36,160 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-27 20:14:36,160 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:14:36,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:14:36,161 INFO L82 PathProgramCache]: Analyzing trace with hash -444685044, now seen corresponding path program 12 times [2020-10-27 20:14:36,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:14:36,161 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [367692389] [2020-10-27 20:14:36,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:14:36,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:14:36,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:14:37,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:14:41,232 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:14:41,232 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 173 [2020-10-27 20:14:41,233 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:14:41,233 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5038 [2020-10-27 20:14:41,233 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:14:41,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-27 20:14:41,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 63 [2020-10-27 20:14:41,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 105 [2020-10-27 20:14:41,233 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:14:41,805 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:14:41,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:14:41,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:14:41,809 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:14:41,809 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:14:41,810 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:14:41,810 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:14:41,810 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:14:41,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:14:41,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:14:41,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:14:41,810 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:14:41,829 INFO L134 CoverageAnalysis]: Checked inductivity of 1801 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 625 trivial. 0 not checked. [2020-10-27 20:14:41,829 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [367692389] [2020-10-27 20:14:41,829 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:14:41,829 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-27 20:14:41,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483824526] [2020-10-27 20:14:41,830 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-27 20:14:41,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:14:41,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-27 20:14:41,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=357, Invalid=513, Unknown=0, NotChecked=0, Total=870 [2020-10-27 20:14:41,830 INFO L87 Difference]: Start difference. First operand 168 states and 170 transitions. Second operand 30 states. [2020-10-27 20:14:42,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:14:42,357 INFO L93 Difference]: Finished difference Result 178 states and 180 transitions. [2020-10-27 20:14:42,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-27 20:14:42,358 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 163 [2020-10-27 20:14:42,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:14:42,360 INFO L225 Difference]: With dead ends: 178 [2020-10-27 20:14:42,360 INFO L226 Difference]: Without dead ends: 171 [2020-10-27 20:14:42,362 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=367, Invalid=625, Unknown=0, NotChecked=0, Total=992 [2020-10-27 20:14:42,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2020-10-27 20:14:42,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 169. [2020-10-27 20:14:42,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-10-27 20:14:42,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 171 transitions. [2020-10-27 20:14:42,371 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 171 transitions. Word has length 163 [2020-10-27 20:14:42,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:14:42,371 INFO L481 AbstractCegarLoop]: Abstraction has 169 states and 171 transitions. [2020-10-27 20:14:42,371 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-27 20:14:42,371 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 171 transitions. [2020-10-27 20:14:42,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2020-10-27 20:14:42,372 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:14:42,373 INFO L422 BasicCegarLoop]: trace histogram [26, 25, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:14:42,373 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-27 20:14:42,373 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:14:42,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:14:42,373 INFO L82 PathProgramCache]: Analyzing trace with hash 155466117, now seen corresponding path program 26 times [2020-10-27 20:14:42,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:14:42,374 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [404461045] [2020-10-27 20:14:42,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:14:42,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:14:42,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:14:43,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:14:46,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:14:47,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:14:47,442 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:14:47,442 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 177 [2020-10-27 20:14:47,442 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 20:14:47,442 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5031 [2020-10-27 20:14:47,443 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:14:47,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-27 20:14:47,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 63 [2020-10-27 20:14:47,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 103 [2020-10-27 20:14:47,443 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:14:48,041 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:14:48,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:14:48,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:14:48,046 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:14:48,046 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:14:48,046 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:14:48,046 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:14:48,046 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:14:48,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:14:48,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:14:48,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:14:48,047 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:14:48,067 INFO L134 CoverageAnalysis]: Checked inductivity of 1900 backedges. 25 proven. 1250 refuted. 0 times theorem prover too weak. 625 trivial. 0 not checked. [2020-10-27 20:14:48,067 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [404461045] [2020-10-27 20:14:48,067 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:14:48,067 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-27 20:14:48,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135799869] [2020-10-27 20:14:48,068 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-27 20:14:48,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:14:48,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-27 20:14:48,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=382, Invalid=488, Unknown=0, NotChecked=0, Total=870 [2020-10-27 20:14:48,068 INFO L87 Difference]: Start difference. First operand 169 states and 171 transitions. Second operand 30 states. [2020-10-27 20:14:49,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:14:49,149 INFO L93 Difference]: Finished difference Result 290 states and 296 transitions. [2020-10-27 20:14:49,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-10-27 20:14:49,152 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 167 [2020-10-27 20:14:49,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:14:49,154 INFO L225 Difference]: With dead ends: 290 [2020-10-27 20:14:49,154 INFO L226 Difference]: Without dead ends: 178 [2020-10-27 20:14:49,155 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1136, Invalid=1944, Unknown=0, NotChecked=0, Total=3080 [2020-10-27 20:14:49,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-10-27 20:14:49,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 174. [2020-10-27 20:14:49,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2020-10-27 20:14:49,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 176 transitions. [2020-10-27 20:14:49,162 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 176 transitions. Word has length 167 [2020-10-27 20:14:49,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:14:49,162 INFO L481 AbstractCegarLoop]: Abstraction has 174 states and 176 transitions. [2020-10-27 20:14:49,162 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-27 20:14:49,162 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 176 transitions. [2020-10-27 20:14:49,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2020-10-27 20:14:49,163 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:14:49,163 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:14:49,163 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-27 20:14:49,164 INFO L429 AbstractCegarLoop]: === Iteration 42 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:14:49,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:14:49,164 INFO L82 PathProgramCache]: Analyzing trace with hash 1718744997, now seen corresponding path program 13 times [2020-10-27 20:14:49,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:14:49,164 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [205879057] [2020-10-27 20:14:49,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:14:49,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:14:49,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:14:50,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:14:54,213 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:14:54,213 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 179 [2020-10-27 20:14:54,213 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:14:54,213 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-27 20:14:54,213 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:14:54,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-27 20:14:54,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 65 [2020-10-27 20:14:54,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 109 [2020-10-27 20:14:54,214 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:14:54,876 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:14:54,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:14:54,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:14:54,881 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:14:54,881 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:14:54,881 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:14:54,881 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:14:54,881 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:14:54,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:14:54,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:14:54,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:14:54,882 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:14:54,905 INFO L134 CoverageAnalysis]: Checked inductivity of 1951 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 676 trivial. 0 not checked. [2020-10-27 20:14:54,906 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [205879057] [2020-10-27 20:14:54,906 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:14:54,906 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-27 20:14:54,906 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134531544] [2020-10-27 20:14:54,906 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-27 20:14:54,906 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:14:54,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-27 20:14:54,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=384, Invalid=546, Unknown=0, NotChecked=0, Total=930 [2020-10-27 20:14:54,907 INFO L87 Difference]: Start difference. First operand 174 states and 176 transitions. Second operand 31 states. [2020-10-27 20:14:55,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:14:55,486 INFO L93 Difference]: Finished difference Result 184 states and 186 transitions. [2020-10-27 20:14:55,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-27 20:14:55,486 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 169 [2020-10-27 20:14:55,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:14:55,488 INFO L225 Difference]: With dead ends: 184 [2020-10-27 20:14:55,488 INFO L226 Difference]: Without dead ends: 177 [2020-10-27 20:14:55,489 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=394, Invalid=662, Unknown=0, NotChecked=0, Total=1056 [2020-10-27 20:14:55,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-10-27 20:14:55,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 175. [2020-10-27 20:14:55,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2020-10-27 20:14:55,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 177 transitions. [2020-10-27 20:14:55,499 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 177 transitions. Word has length 169 [2020-10-27 20:14:55,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:14:55,500 INFO L481 AbstractCegarLoop]: Abstraction has 175 states and 177 transitions. [2020-10-27 20:14:55,500 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-27 20:14:55,500 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 177 transitions. [2020-10-27 20:14:55,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2020-10-27 20:14:55,508 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:14:55,508 INFO L422 BasicCegarLoop]: trace histogram [27, 26, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:14:55,508 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-27 20:14:55,508 INFO L429 AbstractCegarLoop]: === Iteration 43 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:14:55,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:14:55,509 INFO L82 PathProgramCache]: Analyzing trace with hash 1688901534, now seen corresponding path program 27 times [2020-10-27 20:14:55,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:14:55,509 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1574998806] [2020-10-27 20:14:55,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:14:55,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:14:55,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:14:57,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:14:58,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:14:59,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:15:00,577 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:15:00,578 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 183 [2020-10-27 20:15:00,578 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 20:15:00,578 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5027 [2020-10-27 20:15:00,578 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:15:00,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-27 20:15:00,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 65 [2020-10-27 20:15:00,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 113 [2020-10-27 20:15:00,578 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:15:01,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:15:01,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:15:01,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:15:01,292 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:15:01,292 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:15:01,292 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:15:01,292 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:15:01,292 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:15:01,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:15:01,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:15:01,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:15:01,293 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:15:01,317 INFO L134 CoverageAnalysis]: Checked inductivity of 2054 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 676 trivial. 0 not checked. [2020-10-27 20:15:01,317 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1574998806] [2020-10-27 20:15:01,317 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:15:01,317 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-27 20:15:01,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322734749] [2020-10-27 20:15:01,318 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-27 20:15:01,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:15:01,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-27 20:15:01,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=412, Invalid=580, Unknown=0, NotChecked=0, Total=992 [2020-10-27 20:15:01,319 INFO L87 Difference]: Start difference. First operand 175 states and 177 transitions. Second operand 32 states. [2020-10-27 20:15:01,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:15:01,845 INFO L93 Difference]: Finished difference Result 303 states and 309 transitions. [2020-10-27 20:15:01,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-27 20:15:01,846 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 173 [2020-10-27 20:15:01,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:15:01,847 INFO L225 Difference]: With dead ends: 303 [2020-10-27 20:15:01,848 INFO L226 Difference]: Without dead ends: 183 [2020-10-27 20:15:01,849 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=422, Invalid=700, Unknown=0, NotChecked=0, Total=1122 [2020-10-27 20:15:01,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-10-27 20:15:01,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 181. [2020-10-27 20:15:01,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2020-10-27 20:15:01,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 183 transitions. [2020-10-27 20:15:01,856 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 183 transitions. Word has length 173 [2020-10-27 20:15:01,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:15:01,857 INFO L481 AbstractCegarLoop]: Abstraction has 181 states and 183 transitions. [2020-10-27 20:15:01,857 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-27 20:15:01,857 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 183 transitions. [2020-10-27 20:15:01,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2020-10-27 20:15:01,858 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:15:01,858 INFO L422 BasicCegarLoop]: trace histogram [28, 27, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:15:01,858 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-27 20:15:01,858 INFO L429 AbstractCegarLoop]: === Iteration 44 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:15:01,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:15:01,859 INFO L82 PathProgramCache]: Analyzing trace with hash -1323326793, now seen corresponding path program 28 times [2020-10-27 20:15:01,859 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:15:01,859 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1301119162] [2020-10-27 20:15:01,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:15:01,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:15:01,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:15:03,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:15:06,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:15:06,939 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:15:06,939 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 189 [2020-10-27 20:15:06,939 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:15:06,939 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5042 [2020-10-27 20:15:06,939 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:15:06,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-27 20:15:06,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 67 [2020-10-27 20:15:06,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 111 [2020-10-27 20:15:06,940 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:15:07,663 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:15:07,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:15:07,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:15:07,667 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:15:07,667 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:15:07,667 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:15:07,667 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 20:15:07,667 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:15:07,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:15:07,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:15:07,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:15:07,667 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:15:07,689 INFO L134 CoverageAnalysis]: Checked inductivity of 2214 backedges. 27 proven. 1458 refuted. 0 times theorem prover too weak. 729 trivial. 0 not checked. [2020-10-27 20:15:07,689 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1301119162] [2020-10-27 20:15:07,689 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:15:07,689 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-27 20:15:07,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230210898] [2020-10-27 20:15:07,690 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-27 20:15:07,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:15:07,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-27 20:15:07,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=439, Invalid=553, Unknown=0, NotChecked=0, Total=992 [2020-10-27 20:15:07,691 INFO L87 Difference]: Start difference. First operand 181 states and 183 transitions. Second operand 32 states. [2020-10-27 20:15:08,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:15:08,889 INFO L93 Difference]: Finished difference Result 310 states and 316 transitions. [2020-10-27 20:15:08,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2020-10-27 20:15:08,889 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 179 [2020-10-27 20:15:08,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:15:08,891 INFO L225 Difference]: With dead ends: 310 [2020-10-27 20:15:08,892 INFO L226 Difference]: Without dead ends: 190 [2020-10-27 20:15:08,894 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 432 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1307, Invalid=2233, Unknown=0, NotChecked=0, Total=3540 [2020-10-27 20:15:08,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-10-27 20:15:08,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 186. [2020-10-27 20:15:08,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2020-10-27 20:15:08,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 188 transitions. [2020-10-27 20:15:08,900 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 188 transitions. Word has length 179 [2020-10-27 20:15:08,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:15:08,901 INFO L481 AbstractCegarLoop]: Abstraction has 186 states and 188 transitions. [2020-10-27 20:15:08,901 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-27 20:15:08,901 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 188 transitions. [2020-10-27 20:15:08,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2020-10-27 20:15:08,902 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:15:08,902 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:15:08,902 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-27 20:15:08,902 INFO L429 AbstractCegarLoop]: === Iteration 45 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:15:08,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:15:08,903 INFO L82 PathProgramCache]: Analyzing trace with hash -1048411177, now seen corresponding path program 14 times [2020-10-27 20:15:08,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:15:08,903 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [308191737] [2020-10-27 20:15:08,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:15:08,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:15:08,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:15:10,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:15:13,957 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:15:13,958 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 191 [2020-10-27 20:15:13,958 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:15:13,958 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5021 [2020-10-27 20:15:13,958 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:15:13,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-27 20:15:13,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 69 [2020-10-27 20:15:13,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 117 [2020-10-27 20:15:13,958 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:15:14,726 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:15:14,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:15:14,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:15:14,731 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:15:14,731 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:15:14,731 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:15:14,731 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 20:15:14,731 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:15:14,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:15:14,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:15:14,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:15:14,732 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:15:14,756 INFO L134 CoverageAnalysis]: Checked inductivity of 2269 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 784 trivial. 0 not checked. [2020-10-27 20:15:14,757 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [308191737] [2020-10-27 20:15:14,757 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:15:14,757 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-27 20:15:14,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389479851] [2020-10-27 20:15:14,758 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-27 20:15:14,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:15:14,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-27 20:15:14,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=441, Invalid=615, Unknown=0, NotChecked=0, Total=1056 [2020-10-27 20:15:14,759 INFO L87 Difference]: Start difference. First operand 186 states and 188 transitions. Second operand 33 states. [2020-10-27 20:15:15,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:15:15,361 INFO L93 Difference]: Finished difference Result 196 states and 198 transitions. [2020-10-27 20:15:15,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-27 20:15:15,362 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 181 [2020-10-27 20:15:15,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:15:15,363 INFO L225 Difference]: With dead ends: 196 [2020-10-27 20:15:15,363 INFO L226 Difference]: Without dead ends: 189 [2020-10-27 20:15:15,364 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=451, Invalid=739, Unknown=0, NotChecked=0, Total=1190 [2020-10-27 20:15:15,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2020-10-27 20:15:15,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 187. [2020-10-27 20:15:15,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2020-10-27 20:15:15,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 189 transitions. [2020-10-27 20:15:15,371 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 189 transitions. Word has length 181 [2020-10-27 20:15:15,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:15:15,372 INFO L481 AbstractCegarLoop]: Abstraction has 187 states and 189 transitions. [2020-10-27 20:15:15,372 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-27 20:15:15,372 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 189 transitions. [2020-10-27 20:15:15,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2020-10-27 20:15:15,373 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:15:15,373 INFO L422 BasicCegarLoop]: trace histogram [29, 28, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:15:15,373 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-27 20:15:15,374 INFO L429 AbstractCegarLoop]: === Iteration 46 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:15:15,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:15:15,374 INFO L82 PathProgramCache]: Analyzing trace with hash 1867889360, now seen corresponding path program 29 times [2020-10-27 20:15:15,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:15:15,374 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [861794517] [2020-10-27 20:15:15,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:15:15,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:15:15,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:15:17,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking...