/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/array-crafted/zero_sum_const4.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 14:07:37,531 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 14:07:37,536 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 14:07:37,601 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 14:07:37,601 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 14:07:37,610 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 14:07:37,612 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 14:07:37,617 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 14:07:37,620 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 14:07:37,628 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 14:07:37,629 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 14:07:37,631 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 14:07:37,632 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 14:07:37,636 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 14:07:37,639 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 14:07:37,642 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 14:07:37,643 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 14:07:37,647 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 14:07:37,654 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 14:07:37,663 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 14:07:37,665 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 14:07:37,667 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 14:07:37,668 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 14:07:37,671 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 14:07:37,681 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 14:07:37,681 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 14:07:37,681 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 14:07:37,684 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 14:07:37,684 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 14:07:37,685 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 14:07:37,686 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 14:07:37,687 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 14:07:37,689 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 14:07:37,690 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 14:07:37,692 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 14:07:37,692 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 14:07:37,693 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 14:07:37,693 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 14:07:37,693 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 14:07:37,694 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 14:07:37,695 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 14:07:37,703 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 14:07:37,755 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 14:07:37,755 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 14:07:37,759 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 14:07:37,760 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 14:07:37,760 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 14:07:37,760 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 14:07:37,760 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 14:07:37,761 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 14:07:37,761 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 14:07:37,761 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 14:07:37,762 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 14:07:37,762 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 14:07:37,763 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 14:07:37,763 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 14:07:37,763 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 14:07:37,763 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 14:07:37,763 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 14:07:37,764 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 14:07:37,764 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 14:07:37,764 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 14:07:37,764 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 14:07:37,764 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 14:07:37,765 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 14:07:37,765 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 14:07:37,765 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 14:07:37,765 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 14:07:37,765 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 14:07:37,766 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 14:07:37,766 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 14:07:37,766 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 14:07:38,232 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 14:07:38,265 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 14:07:38,268 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 14:07:38,270 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 14:07:38,271 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 14:07:38,273 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-crafted/zero_sum_const4.c [2020-10-27 14:07:38,379 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b0bee461f/a69411df1db24169b227bd26d8cbff89/FLAG5aada907c [2020-10-27 14:07:39,188 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 14:07:39,190 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-crafted/zero_sum_const4.c [2020-10-27 14:07:39,199 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b0bee461f/a69411df1db24169b227bd26d8cbff89/FLAG5aada907c [2020-10-27 14:07:39,510 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b0bee461f/a69411df1db24169b227bd26d8cbff89 [2020-10-27 14:07:39,513 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 14:07:39,521 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 14:07:39,523 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 14:07:39,523 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 14:07:39,531 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 14:07:39,532 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 02:07:39" (1/1) ... [2020-10-27 14:07:39,536 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@33836534 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:07:39, skipping insertion in model container [2020-10-27 14:07:39,536 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 02:07:39" (1/1) ... [2020-10-27 14:07:39,545 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 14:07:39,564 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 14:07:39,779 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 14:07:39,791 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 14:07:39,818 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 14:07:39,835 INFO L208 MainTranslator]: Completed translation [2020-10-27 14:07:39,836 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:07:39 WrapperNode [2020-10-27 14:07:39,836 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 14:07:39,838 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 14:07:39,838 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 14:07:39,838 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 14:07:39,853 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:07:39" (1/1) ... [2020-10-27 14:07:39,853 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:07:39" (1/1) ... [2020-10-27 14:07:39,862 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:07:39" (1/1) ... [2020-10-27 14:07:39,863 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:07:39" (1/1) ... [2020-10-27 14:07:39,874 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:07:39" (1/1) ... [2020-10-27 14:07:39,882 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:07:39" (1/1) ... [2020-10-27 14:07:39,884 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:07:39" (1/1) ... [2020-10-27 14:07:39,888 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 14:07:39,889 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 14:07:39,889 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 14:07:39,889 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 14:07:39,891 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:07:39" (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 14:07:39,987 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 14:07:39,988 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 14:07:39,988 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 14:07:39,988 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-27 14:07:39,988 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-27 14:07:39,989 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 14:07:39,989 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 14:07:39,989 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 14:07:39,989 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 14:07:39,989 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 14:07:39,990 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-27 14:07:39,990 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-27 14:07:39,990 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_long [2020-10-27 14:07:39,990 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-27 14:07:39,990 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 14:07:39,990 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-27 14:07:39,991 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 14:07:39,991 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 14:07:39,991 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 14:07:39,991 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 14:07:39,991 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 14:07:39,992 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 14:07:40,434 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 14:07:40,435 INFO L298 CfgBuilder]: Removed 9 assume(true) statements. [2020-10-27 14:07:40,437 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 02:07:40 BoogieIcfgContainer [2020-10-27 14:07:40,437 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 14:07:40,439 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 14:07:40,439 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 14:07:40,443 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 14:07:40,443 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 02:07:39" (1/3) ... [2020-10-27 14:07:40,444 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@658febbf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 02:07:40, skipping insertion in model container [2020-10-27 14:07:40,445 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:07:39" (2/3) ... [2020-10-27 14:07:40,445 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@658febbf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 02:07:40, skipping insertion in model container [2020-10-27 14:07:40,445 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 02:07:40" (3/3) ... [2020-10-27 14:07:40,447 INFO L111 eAbstractionObserver]: Analyzing ICFG zero_sum_const4.c [2020-10-27 14:07:40,460 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 14:07:40,464 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 14:07:40,480 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 14:07:40,513 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 14:07:40,514 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 14:07:40,514 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 14:07:40,514 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 14:07:40,514 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 14:07:40,514 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 14:07:40,514 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 14:07:40,514 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 14:07:40,535 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states. [2020-10-27 14:07:40,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-27 14:07:40,543 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:07:40,544 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:07:40,545 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:07:40,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:07:40,552 INFO L82 PathProgramCache]: Analyzing trace with hash 1429331599, now seen corresponding path program 1 times [2020-10-27 14:07:40,564 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:07:40,565 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1352541521] [2020-10-27 14:07:40,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:07:40,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:07:40,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:40,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:41,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:41,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:41,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:41,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:41,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:41,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:41,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:42,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:45,786 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:07:45,786 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-27 14:07:45,786 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-27 14:07:45,787 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-27 14:07:45,789 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:07:45,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:07:45,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-27 14:07:45,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:07:45,791 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-27 14:07:45,898 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:07:45,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:07:45,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:45,914 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:07:45,915 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:07:45,915 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:07:45,915 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 14:07:45,915 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:07:45,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:07:45,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:07:45,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:07:45,916 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:07:45,927 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 14:07:45,928 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1352541521] [2020-10-27 14:07:45,931 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 14:07:45,931 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-27 14:07:45,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815526816] [2020-10-27 14:07:45,937 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-27 14:07:45,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:07:45,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-27 14:07:45,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-27 14:07:45,957 INFO L87 Difference]: Start difference. First operand 49 states. Second operand 3 states. [2020-10-27 14:07:46,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:07:46,120 INFO L93 Difference]: Finished difference Result 86 states and 123 transitions. [2020-10-27 14:07:46,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-27 14:07:46,123 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2020-10-27 14:07:46,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:07:46,132 INFO L225 Difference]: With dead ends: 86 [2020-10-27 14:07:46,132 INFO L226 Difference]: Without dead ends: 39 [2020-10-27 14:07:46,136 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 14:07:46,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-27 14:07:46,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-10-27 14:07:46,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-27 14:07:46,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 47 transitions. [2020-10-27 14:07:46,184 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 47 transitions. Word has length 29 [2020-10-27 14:07:46,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:07:46,185 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 47 transitions. [2020-10-27 14:07:46,185 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-27 14:07:46,185 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 47 transitions. [2020-10-27 14:07:46,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-27 14:07:46,187 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:07:46,187 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:07:46,187 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 14:07:46,187 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:07:46,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:07:46,188 INFO L82 PathProgramCache]: Analyzing trace with hash -1838542495, now seen corresponding path program 1 times [2020-10-27 14:07:46,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:07:46,189 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [364679603] [2020-10-27 14:07:46,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:07:46,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:07:46,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:46,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:46,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:46,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:46,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:46,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:46,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:46,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:46,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:49,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:51,206 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:07:51,206 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-27 14:07:51,207 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-27 14:07:51,207 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-27 14:07:51,208 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:07:51,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 14:07:51,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 14:07:51,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-27 14:07:51,215 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 7 [2020-10-27 14:07:51,300 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:07:51,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:07:51,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:51,316 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:07:51,316 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:07:51,316 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:07:51,317 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 14:07:51,317 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:07:51,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:07:51,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:07:51,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:07:51,318 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:07:51,335 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 14:07:51,336 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [364679603] [2020-10-27 14:07:51,336 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 14:07:51,337 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 14:07:51,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335634715] [2020-10-27 14:07:51,339 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 14:07:51,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:07:51,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 14:07:51,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 14:07:51,342 INFO L87 Difference]: Start difference. First operand 39 states and 47 transitions. Second operand 5 states. [2020-10-27 14:07:51,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:07:51,667 INFO L93 Difference]: Finished difference Result 87 states and 111 transitions. [2020-10-27 14:07:51,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 14:07:51,667 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 29 [2020-10-27 14:07:51,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:07:51,669 INFO L225 Difference]: With dead ends: 87 [2020-10-27 14:07:51,669 INFO L226 Difference]: Without dead ends: 57 [2020-10-27 14:07:51,670 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-27 14:07:51,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-27 14:07:51,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 48. [2020-10-27 14:07:51,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-27 14:07:51,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 56 transitions. [2020-10-27 14:07:51,682 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 56 transitions. Word has length 29 [2020-10-27 14:07:51,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:07:51,682 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 56 transitions. [2020-10-27 14:07:51,682 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 14:07:51,683 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 56 transitions. [2020-10-27 14:07:51,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-27 14:07:51,684 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:07:51,684 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:07:51,685 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 14:07:51,685 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:07:51,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:07:51,686 INFO L82 PathProgramCache]: Analyzing trace with hash 551314867, now seen corresponding path program 1 times [2020-10-27 14:07:51,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:07:51,686 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [159539753] [2020-10-27 14:07:51,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:07:51,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:07:51,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:51,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:51,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:51,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:51,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:51,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:52,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:55,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:56,710 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:07:56,710 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-27 14:07:56,710 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 14:07:56,711 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-27 14:07:56,711 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:07:56,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 14:07:56,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 14:07:56,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-27 14:07:56,712 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:07:56,780 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:07:56,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:07:56,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:56,789 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:07:56,790 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:07:56,790 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:07:56,790 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:07:56,790 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:07:56,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:07:56,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:07:56,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:07:56,791 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:07:56,800 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-27 14:07:56,800 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [159539753] [2020-10-27 14:07:56,800 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:07:56,801 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 14:07:56,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753137988] [2020-10-27 14:07:56,802 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 14:07:56,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:07:56,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 14:07:56,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 14:07:56,803 INFO L87 Difference]: Start difference. First operand 48 states and 56 transitions. Second operand 6 states. [2020-10-27 14:07:57,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:07:57,065 INFO L93 Difference]: Finished difference Result 104 states and 128 transitions. [2020-10-27 14:07:57,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 14:07:57,066 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 47 [2020-10-27 14:07:57,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:07:57,067 INFO L225 Difference]: With dead ends: 104 [2020-10-27 14:07:57,067 INFO L226 Difference]: Without dead ends: 66 [2020-10-27 14:07:57,068 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-10-27 14:07:57,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-27 14:07:57,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2020-10-27 14:07:57,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-27 14:07:57,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 74 transitions. [2020-10-27 14:07:57,080 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 74 transitions. Word has length 47 [2020-10-27 14:07:57,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:07:57,081 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 74 transitions. [2020-10-27 14:07:57,081 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 14:07:57,081 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 74 transitions. [2020-10-27 14:07:57,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-27 14:07:57,083 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:07:57,083 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:07:57,084 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 14:07:57,084 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:07:57,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:07:57,085 INFO L82 PathProgramCache]: Analyzing trace with hash 998541701, now seen corresponding path program 2 times [2020-10-27 14:07:57,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:07:57,085 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [348482330] [2020-10-27 14:07:57,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:07:57,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:07:57,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:57,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:58,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:00,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:01,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:02,263 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:08:02,263 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-27 14:08:02,264 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 14:08:02,264 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5115 [2020-10-27 14:08:02,264 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:08:02,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 41 [2020-10-27 14:08:02,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 14:08:02,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-27 14:08:02,265 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:08:05,515 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:08:05,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:08:05,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:05,527 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:08:05,528 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:08:05,528 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:08:05,528 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 14:08:05,528 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:08:05,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:08:05,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:08:05,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:08:05,529 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:08:05,578 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:08:05,579 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [348482330] [2020-10-27 14:08:05,579 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:08:05,579 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-27 14:08:05,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712656511] [2020-10-27 14:08:05,580 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-27 14:08:05,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:08:05,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-27 14:08:05,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=1271, Unknown=0, NotChecked=0, Total=1406 [2020-10-27 14:08:05,582 INFO L87 Difference]: Start difference. First operand 66 states and 74 transitions. Second operand 38 states. [2020-10-27 14:08:08,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:08:08,577 INFO L93 Difference]: Finished difference Result 131 states and 147 transitions. [2020-10-27 14:08:08,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-27 14:08:08,577 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 65 [2020-10-27 14:08:08,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:08:08,579 INFO L225 Difference]: With dead ends: 131 [2020-10-27 14:08:08,579 INFO L226 Difference]: Without dead ends: 125 [2020-10-27 14:08:08,581 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 3 SyntacticMatches, 5 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 736 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=276, Invalid=2480, Unknown=0, NotChecked=0, Total=2756 [2020-10-27 14:08:08,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-27 14:08:08,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 113. [2020-10-27 14:08:08,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-10-27 14:08:08,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 129 transitions. [2020-10-27 14:08:08,599 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 129 transitions. Word has length 65 [2020-10-27 14:08:08,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:08:08,600 INFO L481 AbstractCegarLoop]: Abstraction has 113 states and 129 transitions. [2020-10-27 14:08:08,600 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-27 14:08:08,600 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 129 transitions. [2020-10-27 14:08:08,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-27 14:08:08,602 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:08:08,602 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:08:08,602 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 14:08:08,602 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:08:08,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:08:08,603 INFO L82 PathProgramCache]: Analyzing trace with hash 817790087, now seen corresponding path program 3 times [2020-10-27 14:08:08,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:08:08,604 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [760163187] [2020-10-27 14:08:08,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:08:08,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:08:08,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:08,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:08,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:08,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:08,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:09,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:13,632 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:08:13,633 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-27 14:08:13,633 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 14:08:13,633 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-27 14:08:13,633 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:08:13,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 14:08:13,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-10-27 14:08:13,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 14:08:13,634 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:08:13,728 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:08:13,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:08:13,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:13,740 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:08:13,741 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:08:13,741 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:08:13,741 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 14:08:13,741 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:08:13,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:08:13,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:08:13,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:08:13,742 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:08:13,751 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-10-27 14:08:13,751 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [760163187] [2020-10-27 14:08:13,751 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:08:13,752 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 14:08:13,752 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815144705] [2020-10-27 14:08:13,752 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 14:08:13,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:08:13,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 14:08:13,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-27 14:08:13,754 INFO L87 Difference]: Start difference. First operand 113 states and 129 transitions. Second operand 10 states. [2020-10-27 14:08:14,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:08:14,477 INFO L93 Difference]: Finished difference Result 180 states and 210 transitions. [2020-10-27 14:08:14,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 14:08:14,477 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 67 [2020-10-27 14:08:14,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:08:14,479 INFO L225 Difference]: With dead ends: 180 [2020-10-27 14:08:14,479 INFO L226 Difference]: Without dead ends: 132 [2020-10-27 14:08:14,483 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2020-10-27 14:08:14,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-10-27 14:08:14,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 121. [2020-10-27 14:08:14,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-27 14:08:14,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 136 transitions. [2020-10-27 14:08:14,512 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 136 transitions. Word has length 67 [2020-10-27 14:08:14,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:08:14,513 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 136 transitions. [2020-10-27 14:08:14,513 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 14:08:14,515 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 136 transitions. [2020-10-27 14:08:14,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-27 14:08:14,519 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:08:14,519 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:08:14,519 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 14:08:14,520 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:08:14,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:08:14,520 INFO L82 PathProgramCache]: Analyzing trace with hash -1125657145, now seen corresponding path program 4 times [2020-10-27 14:08:14,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:08:14,521 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [204784730] [2020-10-27 14:08:14,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:08:14,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:08:14,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:14,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:14,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:14,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:14,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:14,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:17,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:19,562 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:08:19,562 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-27 14:08:19,562 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 14:08:19,562 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-27 14:08:19,563 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:08:19,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 14:08:19,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 48 [2020-10-27 14:08:19,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-27 14:08:19,563 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:08:19,666 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:08:19,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:08:19,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:19,674 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:08:19,674 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:08:19,674 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:08:19,675 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:08:19,675 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:08:19,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:08:19,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:08:19,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:08:19,676 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:08:19,684 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-10-27 14:08:19,684 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [204784730] [2020-10-27 14:08:19,685 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:08:19,685 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 14:08:19,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804922567] [2020-10-27 14:08:19,686 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 14:08:19,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:08:19,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 14:08:19,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-27 14:08:19,687 INFO L87 Difference]: Start difference. First operand 121 states and 136 transitions. Second operand 10 states. [2020-10-27 14:08:20,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:08:20,164 INFO L93 Difference]: Finished difference Result 205 states and 228 transitions. [2020-10-27 14:08:20,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 14:08:20,165 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 67 [2020-10-27 14:08:20,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:08:20,166 INFO L225 Difference]: With dead ends: 205 [2020-10-27 14:08:20,166 INFO L226 Difference]: Without dead ends: 93 [2020-10-27 14:08:20,171 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2020-10-27 14:08:20,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-27 14:08:20,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 84. [2020-10-27 14:08:20,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-27 14:08:20,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 92 transitions. [2020-10-27 14:08:20,191 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 92 transitions. Word has length 67 [2020-10-27 14:08:20,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:08:20,192 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 92 transitions. [2020-10-27 14:08:20,192 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 14:08:20,192 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 92 transitions. [2020-10-27 14:08:20,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-27 14:08:20,198 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:08:20,198 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:08:20,198 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 14:08:20,199 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:08:20,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:08:20,200 INFO L82 PathProgramCache]: Analyzing trace with hash 854432983, now seen corresponding path program 5 times [2020-10-27 14:08:20,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:08:20,201 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [450095480] [2020-10-27 14:08:20,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:08:20,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:08:20,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:21,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:22,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:24,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:25,464 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:08:25,464 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-27 14:08:25,465 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:08:25,465 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5181 [2020-10-27 14:08:25,465 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:08:25,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 54 [2020-10-27 14:08:25,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 14:08:25,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-10-27 14:08:25,466 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:08:27,794 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:08:27,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:08:27,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:27,803 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:08:27,804 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:08:27,804 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:08:27,804 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:08:27,804 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:08:27,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:08:27,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:08:27,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:08:27,805 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:08:27,859 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-27 14:08:27,859 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [450095480] [2020-10-27 14:08:27,860 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:08:27,860 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-27 14:08:27,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160205420] [2020-10-27 14:08:27,860 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-27 14:08:27,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:08:27,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-27 14:08:27,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1451, Unknown=0, NotChecked=0, Total=1560 [2020-10-27 14:08:27,862 INFO L87 Difference]: Start difference. First operand 84 states and 92 transitions. Second operand 40 states. [2020-10-27 14:08:29,092 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 53 [2020-10-27 14:08:31,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:08:31,566 INFO L93 Difference]: Finished difference Result 156 states and 171 transitions. [2020-10-27 14:08:31,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-27 14:08:31,567 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 83 [2020-10-27 14:08:31,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:08:31,569 INFO L225 Difference]: With dead ends: 156 [2020-10-27 14:08:31,569 INFO L226 Difference]: Without dead ends: 150 [2020-10-27 14:08:31,571 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 8 SyntacticMatches, 11 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 555 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=232, Invalid=2848, Unknown=0, NotChecked=0, Total=3080 [2020-10-27 14:08:31,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-10-27 14:08:31,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 137. [2020-10-27 14:08:31,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-10-27 14:08:31,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 152 transitions. [2020-10-27 14:08:31,589 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 152 transitions. Word has length 83 [2020-10-27 14:08:31,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:08:31,589 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 152 transitions. [2020-10-27 14:08:31,589 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-27 14:08:31,589 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 152 transitions. [2020-10-27 14:08:31,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-27 14:08:31,590 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:08:31,592 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:08:31,592 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 14:08:31,592 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:08:31,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:08:31,593 INFO L82 PathProgramCache]: Analyzing trace with hash 356250457, now seen corresponding path program 6 times [2020-10-27 14:08:31,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:08:31,593 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [822930977] [2020-10-27 14:08:31,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:08:31,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:08:31,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:31,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:31,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:31,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:31,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:32,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:36,626 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:08:36,626 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-27 14:08:36,626 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 14:08:36,626 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-27 14:08:36,627 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:08:36,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 14:08:36,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-10-27 14:08:36,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-27 14:08:36,627 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:08:36,748 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:08:36,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:08:36,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:36,754 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:08:36,754 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:08:36,754 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:08:36,754 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:08:36,755 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:08:36,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:08:36,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:08:36,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:08:36,755 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:08:36,766 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2020-10-27 14:08:36,766 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [822930977] [2020-10-27 14:08:36,767 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:08:36,767 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 14:08:36,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525478660] [2020-10-27 14:08:36,768 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 14:08:36,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:08:36,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 14:08:36,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-27 14:08:36,774 INFO L87 Difference]: Start difference. First operand 137 states and 152 transitions. Second operand 12 states. [2020-10-27 14:08:37,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:08:37,730 INFO L93 Difference]: Finished difference Result 273 states and 309 transitions. [2020-10-27 14:08:37,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 14:08:37,731 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 85 [2020-10-27 14:08:37,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:08:37,732 INFO L225 Difference]: With dead ends: 273 [2020-10-27 14:08:37,732 INFO L226 Difference]: Without dead ends: 166 [2020-10-27 14:08:37,737 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=113, Invalid=349, Unknown=0, NotChecked=0, Total=462 [2020-10-27 14:08:37,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-10-27 14:08:37,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 151. [2020-10-27 14:08:37,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2020-10-27 14:08:37,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 166 transitions. [2020-10-27 14:08:37,771 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 166 transitions. Word has length 85 [2020-10-27 14:08:37,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:08:37,771 INFO L481 AbstractCegarLoop]: Abstraction has 151 states and 166 transitions. [2020-10-27 14:08:37,771 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 14:08:37,771 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 166 transitions. [2020-10-27 14:08:37,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-27 14:08:37,776 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:08:37,776 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:08:37,777 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 14:08:37,778 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:08:37,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:08:37,779 INFO L82 PathProgramCache]: Analyzing trace with hash 2119785625, now seen corresponding path program 7 times [2020-10-27 14:08:37,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:08:37,780 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2128422044] [2020-10-27 14:08:37,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:08:37,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:08:37,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:37,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:37,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:37,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:37,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:38,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:42,805 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:08:42,806 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-27 14:08:42,806 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 14:08:42,806 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-27 14:08:42,806 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:08:42,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 14:08:42,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 52 [2020-10-27 14:08:42,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-27 14:08:42,807 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:08:42,921 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:08:42,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:08:42,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:42,929 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:08:42,929 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:08:42,930 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:08:42,930 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 14:08:42,930 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:08:42,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:08:42,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:08:42,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:08:42,931 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:08:42,942 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2020-10-27 14:08:42,942 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2128422044] [2020-10-27 14:08:42,942 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:08:42,943 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 14:08:42,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031314964] [2020-10-27 14:08:42,950 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 14:08:42,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:08:42,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 14:08:42,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-27 14:08:42,952 INFO L87 Difference]: Start difference. First operand 151 states and 166 transitions. Second operand 12 states. [2020-10-27 14:08:43,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:08:43,512 INFO L93 Difference]: Finished difference Result 253 states and 276 transitions. [2020-10-27 14:08:43,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 14:08:43,512 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 85 [2020-10-27 14:08:43,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:08:43,514 INFO L225 Difference]: With dead ends: 253 [2020-10-27 14:08:43,515 INFO L226 Difference]: Without dead ends: 111 [2020-10-27 14:08:43,516 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-10-27 14:08:43,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-27 14:08:43,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 102. [2020-10-27 14:08:43,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-27 14:08:43,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 110 transitions. [2020-10-27 14:08:43,528 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 110 transitions. Word has length 85 [2020-10-27 14:08:43,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:08:43,528 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 110 transitions. [2020-10-27 14:08:43,529 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 14:08:43,529 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 110 transitions. [2020-10-27 14:08:43,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-10-27 14:08:43,530 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:08:43,530 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:08:43,531 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 14:08:43,532 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:08:43,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:08:43,532 INFO L82 PathProgramCache]: Analyzing trace with hash -1021657175, now seen corresponding path program 8 times [2020-10-27 14:08:43,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:08:43,533 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [838841120] [2020-10-27 14:08:43,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:08:43,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:08:43,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:45,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:48,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:50,049 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:08:50,049 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 111 [2020-10-27 14:08:50,049 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:08:50,050 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6417 [2020-10-27 14:08:50,050 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:08:50,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 76 [2020-10-27 14:08:50,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 14:08:50,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 95 [2020-10-27 14:08:50,050 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:08:53,219 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 37 [2020-10-27 14:08:59,506 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:08:59,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:08:59,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:59,518 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:08:59,519 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:08:59,519 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:08:59,519 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:08:59,519 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:08:59,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:08:59,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:08:59,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:08:59,520 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:08:59,623 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:08:59,623 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [838841120] [2020-10-27 14:08:59,623 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:08:59,624 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [75] total 75 [2020-10-27 14:08:59,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895560709] [2020-10-27 14:08:59,624 INFO L461 AbstractCegarLoop]: Interpolant automaton has 75 states [2020-10-27 14:08:59,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:08:59,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2020-10-27 14:08:59,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=635, Invalid=4915, Unknown=0, NotChecked=0, Total=5550 [2020-10-27 14:08:59,629 INFO L87 Difference]: Start difference. First operand 102 states and 110 transitions. Second operand 75 states. [2020-10-27 14:09:00,757 WARN L193 SmtUtils]: Spent 546.00 ms on a formula simplification. DAG size of input: 178 DAG size of output: 98 [2020-10-27 14:09:01,359 WARN L193 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 90 [2020-10-27 14:09:02,515 WARN L193 SmtUtils]: Spent 457.00 ms on a formula simplification. DAG size of input: 169 DAG size of output: 96 [2020-10-27 14:09:03,147 WARN L193 SmtUtils]: Spent 363.00 ms on a formula simplification. DAG size of input: 144 DAG size of output: 89 [2020-10-27 14:09:03,978 WARN L193 SmtUtils]: Spent 428.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 87 [2020-10-27 14:09:04,733 WARN L193 SmtUtils]: Spent 448.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 105 [2020-10-27 14:09:05,581 WARN L193 SmtUtils]: Spent 332.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 92 [2020-10-27 14:09:06,428 WARN L193 SmtUtils]: Spent 454.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 94 [2020-10-27 14:09:06,726 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 52 [2020-10-27 14:09:07,275 WARN L193 SmtUtils]: Spent 359.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 93 [2020-10-27 14:09:08,197 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 75 [2020-10-27 14:09:08,987 WARN L193 SmtUtils]: Spent 439.00 ms on a formula simplification. DAG size of input: 177 DAG size of output: 95 [2020-10-27 14:09:09,410 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 79 [2020-10-27 14:09:09,789 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 62 [2020-10-27 14:09:10,449 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 174 DAG size of output: 35 [2020-10-27 14:09:10,989 WARN L193 SmtUtils]: Spent 342.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 90 [2020-10-27 14:09:11,643 WARN L193 SmtUtils]: Spent 377.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 87 [2020-10-27 14:09:12,487 WARN L193 SmtUtils]: Spent 491.00 ms on a formula simplification. DAG size of input: 156 DAG size of output: 89 [2020-10-27 14:09:13,187 WARN L193 SmtUtils]: Spent 362.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 88 [2020-10-27 14:09:13,822 WARN L193 SmtUtils]: Spent 380.00 ms on a formula simplification. DAG size of input: 192 DAG size of output: 82 [2020-10-27 14:09:14,452 WARN L193 SmtUtils]: Spent 323.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 80 [2020-10-27 14:09:15,197 WARN L193 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 78 [2020-10-27 14:09:15,796 WARN L193 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 70 [2020-10-27 14:09:16,233 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 71 [2020-10-27 14:09:16,603 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 54 [2020-10-27 14:09:24,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:09:24,612 INFO L93 Difference]: Finished difference Result 343 states and 391 transitions. [2020-10-27 14:09:24,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2020-10-27 14:09:24,613 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 101 [2020-10-27 14:09:24,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:09:24,616 INFO L225 Difference]: With dead ends: 343 [2020-10-27 14:09:24,616 INFO L226 Difference]: Without dead ends: 335 [2020-10-27 14:09:24,621 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 3 SyntacticMatches, 3 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3334 ImplicationChecksByTransitivity, 22.7s TimeCoverageRelationStatistics Valid=1450, Invalid=10540, Unknown=0, NotChecked=0, Total=11990 [2020-10-27 14:09:24,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2020-10-27 14:09:24,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 288. [2020-10-27 14:09:24,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 288 states. [2020-10-27 14:09:24,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 332 transitions. [2020-10-27 14:09:24,655 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 332 transitions. Word has length 101 [2020-10-27 14:09:24,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:09:24,655 INFO L481 AbstractCegarLoop]: Abstraction has 288 states and 332 transitions. [2020-10-27 14:09:24,655 INFO L482 AbstractCegarLoop]: Interpolant automaton has 75 states. [2020-10-27 14:09:24,656 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 332 transitions. [2020-10-27 14:09:24,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-10-27 14:09:24,657 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:09:24,657 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:09:24,657 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 14:09:24,658 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:09:24,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:09:24,658 INFO L82 PathProgramCache]: Analyzing trace with hash 1606525549, now seen corresponding path program 9 times [2020-10-27 14:09:24,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:09:24,659 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [869789938] [2020-10-27 14:09:24,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:09:24,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:09:24,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:24,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:24,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:24,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:24,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:29,697 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:09:29,697 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 115 [2020-10-27 14:09:29,697 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 14:09:29,697 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-27 14:09:29,697 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:09:29,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 14:09:29,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 44 [2020-10-27 14:09:29,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-27 14:09:29,698 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:09:29,862 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:09:29,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:09:29,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:29,868 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:09:29,868 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:09:29,868 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:09:29,868 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:09:29,869 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:09:29,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:09:29,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:09:29,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:09:29,870 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 14:09:29,883 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2020-10-27 14:09:29,883 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [869789938] [2020-10-27 14:09:29,883 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:09:29,884 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 14:09:29,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459099677] [2020-10-27 14:09:29,884 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 14:09:29,885 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:09:29,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 14:09:29,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-27 14:09:29,886 INFO L87 Difference]: Start difference. First operand 288 states and 332 transitions. Second operand 14 states. [2020-10-27 14:09:31,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:09:31,687 INFO L93 Difference]: Finished difference Result 536 states and 619 transitions. [2020-10-27 14:09:31,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 14:09:31,688 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 105 [2020-10-27 14:09:31,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:09:31,691 INFO L225 Difference]: With dead ends: 536 [2020-10-27 14:09:31,691 INFO L226 Difference]: Without dead ends: 318 [2020-10-27 14:09:31,693 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=155, Invalid=495, Unknown=0, NotChecked=0, Total=650 [2020-10-27 14:09:31,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2020-10-27 14:09:31,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 299. [2020-10-27 14:09:31,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 299 states. [2020-10-27 14:09:31,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 336 transitions. [2020-10-27 14:09:31,730 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 336 transitions. Word has length 105 [2020-10-27 14:09:31,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:09:31,730 INFO L481 AbstractCegarLoop]: Abstraction has 299 states and 336 transitions. [2020-10-27 14:09:31,730 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 14:09:31,730 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 336 transitions. [2020-10-27 14:09:31,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-10-27 14:09:31,732 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:09:31,732 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:09:31,732 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 14:09:31,732 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:09:31,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:09:31,733 INFO L82 PathProgramCache]: Analyzing trace with hash 1071503793, now seen corresponding path program 10 times [2020-10-27 14:09:31,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:09:31,734 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1331140502] [2020-10-27 14:09:31,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:09:31,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:09:31,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:31,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:31,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:31,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:31,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:31,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:33,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:36,776 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:09:36,776 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 119 [2020-10-27 14:09:36,776 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 14:09:36,776 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-10-27 14:09:36,776 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:09:36,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 14:09:36,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 62 [2020-10-27 14:09:36,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-27 14:09:36,777 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:09:36,979 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:09:36,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:09:36,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:36,984 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:09:36,985 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:09:36,985 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:09:36,985 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:09:36,985 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:09:36,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:09:36,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:09:36,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:09:36,986 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:09:36,997 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 62 proven. 16 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2020-10-27 14:09:36,997 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1331140502] [2020-10-27 14:09:36,998 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:09:36,998 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 14:09:36,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348640973] [2020-10-27 14:09:36,998 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 14:09:36,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:09:36,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 14:09:36,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2020-10-27 14:09:37,000 INFO L87 Difference]: Start difference. First operand 299 states and 336 transitions. Second operand 16 states. [2020-10-27 14:09:37,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:09:37,967 INFO L93 Difference]: Finished difference Result 410 states and 454 transitions. [2020-10-27 14:09:37,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 14:09:37,968 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 109 [2020-10-27 14:09:37,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:09:37,969 INFO L225 Difference]: With dead ends: 410 [2020-10-27 14:09:37,970 INFO L226 Difference]: Without dead ends: 129 [2020-10-27 14:09:37,971 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=109, Invalid=353, Unknown=0, NotChecked=0, Total=462 [2020-10-27 14:09:37,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-10-27 14:09:37,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 120. [2020-10-27 14:09:37,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-27 14:09:37,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 128 transitions. [2020-10-27 14:09:37,983 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 128 transitions. Word has length 109 [2020-10-27 14:09:37,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:09:37,984 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 128 transitions. [2020-10-27 14:09:37,984 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 14:09:37,984 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 128 transitions. [2020-10-27 14:09:37,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2020-10-27 14:09:37,985 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:09:37,985 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:09:37,985 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 14:09:37,986 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:09:37,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:09:37,986 INFO L82 PathProgramCache]: Analyzing trace with hash 629608955, now seen corresponding path program 11 times [2020-10-27 14:09:37,986 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:09:37,987 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [767313107] [2020-10-27 14:09:37,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:09:38,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:09:38,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:40,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:43,166 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:09:43,166 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 129 [2020-10-27 14:09:43,166 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:09:43,166 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5060 [2020-10-27 14:09:43,166 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:09:43,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 91 [2020-10-27 14:09:43,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 14:09:43,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 113 [2020-10-27 14:09:43,167 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:09:47,448 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 39 [2020-10-27 14:09:49,285 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 37 [2020-10-27 14:09:57,025 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:09:57,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:09:57,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:57,036 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:09:57,036 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:09:57,037 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:09:57,037 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:09:57,037 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:09:57,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:09:57,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:09:57,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:09:57,037 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:09:57,155 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 2 proven. 223 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:09:57,156 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [767313107] [2020-10-27 14:09:57,156 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:09:57,156 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [88] total 88 [2020-10-27 14:09:57,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258959019] [2020-10-27 14:09:57,157 INFO L461 AbstractCegarLoop]: Interpolant automaton has 88 states [2020-10-27 14:09:57,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:09:57,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2020-10-27 14:09:57,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=404, Invalid=7252, Unknown=0, NotChecked=0, Total=7656 [2020-10-27 14:09:57,160 INFO L87 Difference]: Start difference. First operand 120 states and 128 transitions. Second operand 88 states. [2020-10-27 14:09:57,987 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 46 [2020-10-27 14:09:59,970 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 61 [2020-10-27 14:10:00,480 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 45 [2020-10-27 14:10:00,956 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 36 [2020-10-27 14:10:04,975 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 56 [2020-10-27 14:10:05,647 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 46 [2020-10-27 14:10:06,603 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 41 [2020-10-27 14:10:07,409 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 24 [2020-10-27 14:10:09,284 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 32 [2020-10-27 14:10:21,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:10:21,609 INFO L93 Difference]: Finished difference Result 387 states and 423 transitions. [2020-10-27 14:10:21,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2020-10-27 14:10:21,612 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 119 [2020-10-27 14:10:21,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:10:21,614 INFO L225 Difference]: With dead ends: 387 [2020-10-27 14:10:21,615 INFO L226 Difference]: Without dead ends: 209 [2020-10-27 14:10:21,620 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 3 SyntacticMatches, 5 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3768 ImplicationChecksByTransitivity, 20.5s TimeCoverageRelationStatistics Valid=899, Invalid=13621, Unknown=0, NotChecked=0, Total=14520 [2020-10-27 14:10:21,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2020-10-27 14:10:21,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 199. [2020-10-27 14:10:21,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2020-10-27 14:10:21,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 214 transitions. [2020-10-27 14:10:21,641 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 214 transitions. Word has length 119 [2020-10-27 14:10:21,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:10:21,642 INFO L481 AbstractCegarLoop]: Abstraction has 199 states and 214 transitions. [2020-10-27 14:10:21,642 INFO L482 AbstractCegarLoop]: Interpolant automaton has 88 states. [2020-10-27 14:10:21,642 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 214 transitions. [2020-10-27 14:10:21,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2020-10-27 14:10:21,643 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:10:21,644 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:10:21,644 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 14:10:21,644 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:10:21,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:10:21,645 INFO L82 PathProgramCache]: Analyzing trace with hash -849171521, now seen corresponding path program 12 times [2020-10-27 14:10:21,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:10:21,645 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [591239936] [2020-10-27 14:10:21,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:10:21,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:10:21,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:10:21,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:10:21,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:10:21,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:10:21,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:10:26,675 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:10:26,675 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 133 [2020-10-27 14:10:26,675 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 14:10:26,675 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-27 14:10:26,675 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:10:26,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 14:10:26,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 50 [2020-10-27 14:10:26,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-27 14:10:26,676 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:10:26,965 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:10:26,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:10:26,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:10:26,972 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:10:26,972 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:10:26,972 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:10:26,972 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:10:26,973 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:10:26,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:10:26,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:10:26,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:10:26,973 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:10:26,985 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 186 trivial. 0 not checked. [2020-10-27 14:10:26,985 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [591239936] [2020-10-27 14:10:26,985 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:10:26,986 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 14:10:26,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120611611] [2020-10-27 14:10:26,986 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 14:10:26,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:10:26,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 14:10:26,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2020-10-27 14:10:26,987 INFO L87 Difference]: Start difference. First operand 199 states and 214 transitions. Second operand 16 states. [2020-10-27 14:10:28,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:10:28,549 INFO L93 Difference]: Finished difference Result 293 states and 321 transitions. [2020-10-27 14:10:28,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 14:10:28,550 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 123 [2020-10-27 14:10:28,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:10:28,551 INFO L225 Difference]: With dead ends: 293 [2020-10-27 14:10:28,552 INFO L226 Difference]: Without dead ends: 138 [2020-10-27 14:10:28,553 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=189, Invalid=623, Unknown=0, NotChecked=0, Total=812 [2020-10-27 14:10:28,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-10-27 14:10:28,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 138. [2020-10-27 14:10:28,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-10-27 14:10:28,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 146 transitions. [2020-10-27 14:10:28,571 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 146 transitions. Word has length 123 [2020-10-27 14:10:28,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:10:28,571 INFO L481 AbstractCegarLoop]: Abstraction has 138 states and 146 transitions. [2020-10-27 14:10:28,571 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 14:10:28,571 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 146 transitions. [2020-10-27 14:10:28,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2020-10-27 14:10:28,573 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:10:28,573 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:10:28,573 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 14:10:28,573 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:10:28,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:10:28,574 INFO L82 PathProgramCache]: Analyzing trace with hash -1557810227, now seen corresponding path program 13 times [2020-10-27 14:10:28,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:10:28,576 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1350405359] [2020-10-27 14:10:28,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:10:28,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:10:28,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:10:31,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:10:34,325 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:10:34,326 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 147 [2020-10-27 14:10:34,326 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:10:34,326 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5638 [2020-10-27 14:10:34,326 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:10:34,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 102 [2020-10-27 14:10:34,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 14:10:34,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 131 [2020-10-27 14:10:34,327 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:10:45,140 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:10:45,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:10:45,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:10:45,164 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:10:45,165 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:10:45,165 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:10:45,165 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 14:10:45,165 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:10:45,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:10:45,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:10:45,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:10:45,166 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:10:45,287 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 288 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-27 14:10:45,288 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1350405359] [2020-10-27 14:10:45,288 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:10:45,288 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58] total 58 [2020-10-27 14:10:45,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283516323] [2020-10-27 14:10:45,288 INFO L461 AbstractCegarLoop]: Interpolant automaton has 58 states [2020-10-27 14:10:45,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:10:45,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2020-10-27 14:10:45,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=3160, Unknown=0, NotChecked=0, Total=3306 [2020-10-27 14:10:45,291 INFO L87 Difference]: Start difference. First operand 138 states and 146 transitions. Second operand 58 states. [2020-10-27 14:10:45,774 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 48 [2020-10-27 14:10:49,394 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 63 [2020-10-27 14:10:50,873 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2020-10-27 14:10:51,699 WARN L193 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 62 [2020-10-27 14:11:03,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:11:03,365 INFO L93 Difference]: Finished difference Result 252 states and 267 transitions. [2020-10-27 14:11:03,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-27 14:11:03,368 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 137 [2020-10-27 14:11:03,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:11:03,371 INFO L225 Difference]: With dead ends: 252 [2020-10-27 14:11:03,371 INFO L226 Difference]: Without dead ends: 246 [2020-10-27 14:11:03,374 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 11 SyntacticMatches, 38 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1393 ImplicationChecksByTransitivity, 15.0s TimeCoverageRelationStatistics Valid=320, Invalid=6486, Unknown=0, NotChecked=0, Total=6806 [2020-10-27 14:11:03,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2020-10-27 14:11:03,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 227. [2020-10-27 14:11:03,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 227 states. [2020-10-27 14:11:03,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 242 transitions. [2020-10-27 14:11:03,401 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 242 transitions. Word has length 137 [2020-10-27 14:11:03,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:11:03,401 INFO L481 AbstractCegarLoop]: Abstraction has 227 states and 242 transitions. [2020-10-27 14:11:03,401 INFO L482 AbstractCegarLoop]: Interpolant automaton has 58 states. [2020-10-27 14:11:03,401 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 242 transitions. [2020-10-27 14:11:03,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2020-10-27 14:11:03,403 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:11:03,403 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:11:03,404 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 14:11:03,404 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:11:03,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:11:03,404 INFO L82 PathProgramCache]: Analyzing trace with hash 96859343, now seen corresponding path program 14 times [2020-10-27 14:11:03,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:11:03,405 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1861455588] [2020-10-27 14:11:03,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:11:03,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:11:03,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:11:03,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:11:03,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:11:03,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:11:03,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:11:08,439 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:11:08,439 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 149 [2020-10-27 14:11:08,439 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 14:11:08,439 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-27 14:11:08,440 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:11:08,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-27 14:11:08,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 54 [2020-10-27 14:11:08,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-27 14:11:08,440 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:11:08,894 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:11:08,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:11:08,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:11:08,899 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:11:08,899 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:11:08,899 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:11:08,899 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:11:08,899 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:11:08,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:11:08,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:11:08,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:11:08,900 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:11:08,914 INFO L134 CoverageAnalysis]: Checked inductivity of 337 backedges. 36 proven. 49 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2020-10-27 14:11:08,914 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1861455588] [2020-10-27 14:11:08,914 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:11:08,915 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-27 14:11:08,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948965393] [2020-10-27 14:11:08,915 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-27 14:11:08,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:11:08,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-27 14:11:08,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2020-10-27 14:11:08,916 INFO L87 Difference]: Start difference. First operand 227 states and 242 transitions. Second operand 18 states. [2020-10-27 14:11:13,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:11:13,349 INFO L93 Difference]: Finished difference Result 447 states and 483 transitions. [2020-10-27 14:11:13,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-27 14:11:13,353 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 139 [2020-10-27 14:11:13,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:11:13,356 INFO L225 Difference]: With dead ends: 447 [2020-10-27 14:11:13,356 INFO L226 Difference]: Without dead ends: 268 [2020-10-27 14:11:13,357 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=260, Invalid=862, Unknown=0, NotChecked=0, Total=1122 [2020-10-27 14:11:13,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2020-10-27 14:11:13,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 241. [2020-10-27 14:11:13,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 241 states. [2020-10-27 14:11:13,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 256 transitions. [2020-10-27 14:11:13,386 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 256 transitions. Word has length 139 [2020-10-27 14:11:13,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:11:13,386 INFO L481 AbstractCegarLoop]: Abstraction has 241 states and 256 transitions. [2020-10-27 14:11:13,386 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-27 14:11:13,386 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 256 transitions. [2020-10-27 14:11:13,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2020-10-27 14:11:13,388 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:11:13,388 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:11:13,388 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-27 14:11:13,388 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:11:13,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:11:13,389 INFO L82 PathProgramCache]: Analyzing trace with hash -1058566641, now seen corresponding path program 15 times [2020-10-27 14:11:13,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:11:13,389 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1360827325] [2020-10-27 14:11:13,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:11:13,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:11:13,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:11:13,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:11:13,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:11:13,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:11:13,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking...