/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.3 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/array-crafted/zero_sum3.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-29 03:22:59,572 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-29 03:22:59,574 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-29 03:22:59,632 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-29 03:22:59,632 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-29 03:22:59,641 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-29 03:22:59,643 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-29 03:22:59,648 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-29 03:22:59,651 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-29 03:22:59,656 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-29 03:22:59,658 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-29 03:22:59,659 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-29 03:22:59,659 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-29 03:22:59,662 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-29 03:22:59,664 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-29 03:22:59,667 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-29 03:22:59,668 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-29 03:22:59,671 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-29 03:22:59,678 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-29 03:22:59,686 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-29 03:22:59,688 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-29 03:22:59,689 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-29 03:22:59,691 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-29 03:22:59,693 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-29 03:22:59,702 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-29 03:22:59,702 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-29 03:22:59,702 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-29 03:22:59,704 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-29 03:22:59,705 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-29 03:22:59,706 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-29 03:22:59,706 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-29 03:22:59,707 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-29 03:22:59,709 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-29 03:22:59,710 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-29 03:22:59,711 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-29 03:22:59,711 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-29 03:22:59,712 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-29 03:22:59,712 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-29 03:22:59,713 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-29 03:22:59,714 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-29 03:22:59,714 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-29 03:22:59,722 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-29 03:22:59,784 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-29 03:22:59,784 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-29 03:22:59,788 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-29 03:22:59,789 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-29 03:22:59,789 INFO L138 SettingsManager]: * Use SBE=true [2020-10-29 03:22:59,790 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-29 03:22:59,790 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-29 03:22:59,790 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-29 03:22:59,790 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-29 03:22:59,790 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-29 03:22:59,791 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-29 03:22:59,792 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-29 03:22:59,792 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-29 03:22:59,792 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-29 03:22:59,793 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-29 03:22:59,793 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-29 03:22:59,793 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-29 03:22:59,793 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-29 03:22:59,793 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-29 03:22:59,795 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-29 03:22:59,795 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-29 03:22:59,800 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 03:22:59,801 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-29 03:22:59,801 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-29 03:22:59,801 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-29 03:22:59,801 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-29 03:22:59,802 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-29 03:22:59,802 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-29 03:22:59,802 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-29 03:22:59,802 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true;unknown-allowed=true; [2020-10-29 03:23:00,221 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-29 03:23:00,264 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-29 03:23:00,268 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-29 03:23:00,269 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-29 03:23:00,270 INFO L275 PluginConnector]: CDTParser initialized [2020-10-29 03:23:00,271 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-crafted/zero_sum3.c [2020-10-29 03:23:00,363 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b17e1573c/925c42be3045412e8d2c64abc77b111e/FLAG00eb29458 [2020-10-29 03:23:01,109 INFO L306 CDTParser]: Found 1 translation units. [2020-10-29 03:23:01,110 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-crafted/zero_sum3.c [2020-10-29 03:23:01,119 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b17e1573c/925c42be3045412e8d2c64abc77b111e/FLAG00eb29458 [2020-10-29 03:23:01,442 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b17e1573c/925c42be3045412e8d2c64abc77b111e [2020-10-29 03:23:01,445 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-29 03:23:01,452 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-29 03:23:01,455 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-29 03:23:01,456 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-29 03:23:01,460 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-29 03:23:01,461 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 03:23:01" (1/1) ... [2020-10-29 03:23:01,466 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2be277ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:23:01, skipping insertion in model container [2020-10-29 03:23:01,466 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 03:23:01" (1/1) ... [2020-10-29 03:23:01,476 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-29 03:23:01,497 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-29 03:23:01,711 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 03:23:01,719 INFO L203 MainTranslator]: Completed pre-run [2020-10-29 03:23:01,744 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 03:23:01,761 INFO L208 MainTranslator]: Completed translation [2020-10-29 03:23:01,761 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:23:01 WrapperNode [2020-10-29 03:23:01,761 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-29 03:23:01,763 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-29 03:23:01,763 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-29 03:23:01,763 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-29 03:23:01,775 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:23:01" (1/1) ... [2020-10-29 03:23:01,776 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:23:01" (1/1) ... [2020-10-29 03:23:01,784 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:23:01" (1/1) ... [2020-10-29 03:23:01,784 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:23:01" (1/1) ... [2020-10-29 03:23:01,793 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:23:01" (1/1) ... [2020-10-29 03:23:01,800 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:23:01" (1/1) ... [2020-10-29 03:23:01,801 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:23:01" (1/1) ... [2020-10-29 03:23:01,804 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-29 03:23:01,805 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-29 03:23:01,805 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-29 03:23:01,806 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-29 03:23:01,806 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:23:01" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 03:23:01,878 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-29 03:23:01,879 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-29 03:23:01,879 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-29 03:23:01,879 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-29 03:23:01,879 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-29 03:23:01,880 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-29 03:23:01,880 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-29 03:23:01,880 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-29 03:23:01,880 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-29 03:23:01,880 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-29 03:23:01,880 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-29 03:23:01,881 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-29 03:23:01,881 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_short [2020-10-29 03:23:01,881 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-29 03:23:01,881 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-29 03:23:01,881 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-29 03:23:01,882 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-29 03:23:01,882 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-29 03:23:01,882 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-29 03:23:01,882 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-29 03:23:02,434 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-29 03:23:02,434 INFO L298 CfgBuilder]: Removed 7 assume(true) statements. [2020-10-29 03:23:02,438 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 03:23:02 BoogieIcfgContainer [2020-10-29 03:23:02,438 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-29 03:23:02,440 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-29 03:23:02,440 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-29 03:23:02,443 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-29 03:23:02,444 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 03:23:01" (1/3) ... [2020-10-29 03:23:02,445 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65f6bcf0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 03:23:02, skipping insertion in model container [2020-10-29 03:23:02,445 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:23:01" (2/3) ... [2020-10-29 03:23:02,446 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65f6bcf0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 03:23:02, skipping insertion in model container [2020-10-29 03:23:02,446 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 03:23:02" (3/3) ... [2020-10-29 03:23:02,448 INFO L111 eAbstractionObserver]: Analyzing ICFG zero_sum3.c [2020-10-29 03:23:02,462 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-29 03:23:02,468 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-29 03:23:02,482 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-29 03:23:02,526 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-29 03:23:02,527 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-29 03:23:02,527 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-29 03:23:02,527 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-29 03:23:02,527 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-29 03:23:02,527 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-29 03:23:02,527 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-29 03:23:02,528 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-29 03:23:02,553 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-10-29 03:23:02,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-29 03:23:02,564 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:23:02,565 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:23:02,566 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:23:02,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:23:02,574 INFO L82 PathProgramCache]: Analyzing trace with hash 924121920, now seen corresponding path program 1 times [2020-10-29 03:23:02,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:23:02,585 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [581343967] [2020-10-29 03:23:02,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:23:02,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:23:02,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:02,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:03,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:03,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:03,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:03,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:03,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:03,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:04,689 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:23:04,690 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-29 03:23:04,691 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-29 03:23:04,691 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1893 [2020-10-29 03:23:04,694 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:23:04,694 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:23:04,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 03:23:04,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 03:23:04,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-29 03:23:04,697 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-29 03:23:04,834 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:23:04,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:23:04,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:04,864 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:23:04,864 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:23:04,864 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:23:04,865 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-29 03:23:04,865 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:23:04,866 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:23:04,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:23:04,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:23:04,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:23:04,867 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 03:23:04,888 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 03:23:04,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [581343967] [2020-10-29 03:23:04,891 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 03:23:04,891 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 03:23:04,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789106370] [2020-10-29 03:23:04,898 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 03:23:04,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:23:04,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 03:23:04,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 03:23:04,925 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 5 states. [2020-10-29 03:23:05,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:23:05,278 INFO L93 Difference]: Finished difference Result 93 states and 133 transitions. [2020-10-29 03:23:05,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-29 03:23:05,282 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 25 [2020-10-29 03:23:05,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:23:05,293 INFO L225 Difference]: With dead ends: 93 [2020-10-29 03:23:05,294 INFO L226 Difference]: Without dead ends: 45 [2020-10-29 03:23:05,300 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-29 03:23:05,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-29 03:23:05,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 39. [2020-10-29 03:23:05,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-29 03:23:05,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 45 transitions. [2020-10-29 03:23:05,368 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 45 transitions. Word has length 25 [2020-10-29 03:23:05,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:23:05,369 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 45 transitions. [2020-10-29 03:23:05,370 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 03:23:05,370 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 45 transitions. [2020-10-29 03:23:05,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-29 03:23:05,372 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:23:05,373 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] [2020-10-29 03:23:05,373 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-29 03:23:05,374 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:23:05,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:23:05,375 INFO L82 PathProgramCache]: Analyzing trace with hash 1776443102, now seen corresponding path program 1 times [2020-10-29 03:23:05,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:23:05,376 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [517248053] [2020-10-29 03:23:05,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:23:05,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:23:05,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:05,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:05,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:05,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:05,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:05,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:06,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:10,412 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:23:10,412 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-29 03:23:10,412 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-29 03:23:10,413 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-29 03:23:10,413 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:23:10,413 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:23:10,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 03:23:10,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 03:23:10,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-29 03:23:10,414 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 03:23:10,500 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:23:10,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:23:10,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:10,509 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:23:10,509 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:23:10,509 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:23:10,509 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 03:23:10,510 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:23:10,510 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:23:10,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:23:10,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:23:10,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:23:10,511 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 03:23:10,517 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-29 03:23:10,518 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [517248053] [2020-10-29 03:23:10,518 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:23:10,518 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-29 03:23:10,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014220089] [2020-10-29 03:23:10,520 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 03:23:10,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:23:10,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 03:23:10,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-29 03:23:10,522 INFO L87 Difference]: Start difference. First operand 39 states and 45 transitions. Second operand 6 states. [2020-10-29 03:23:10,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:23:10,752 INFO L93 Difference]: Finished difference Result 77 states and 93 transitions. [2020-10-29 03:23:10,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-29 03:23:10,753 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 37 [2020-10-29 03:23:10,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:23:10,754 INFO L225 Difference]: With dead ends: 77 [2020-10-29 03:23:10,755 INFO L226 Difference]: Without dead ends: 51 [2020-10-29 03:23:10,756 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-10-29 03:23:10,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-29 03:23:10,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-10-29 03:23:10,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-29 03:23:10,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 57 transitions. [2020-10-29 03:23:10,767 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 57 transitions. Word has length 37 [2020-10-29 03:23:10,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:23:10,768 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 57 transitions. [2020-10-29 03:23:10,768 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 03:23:10,768 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 57 transitions. [2020-10-29 03:23:10,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-29 03:23:10,770 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:23:10,770 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-29 03:23:10,771 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-29 03:23:10,771 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:23:10,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:23:10,771 INFO L82 PathProgramCache]: Analyzing trace with hash -1498598230, now seen corresponding path program 2 times [2020-10-29 03:23:10,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:23:10,772 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2129882086] [2020-10-29 03:23:10,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:23:10,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:23:10,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:10,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:11,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:11,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:12,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:13,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:14,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:15,791 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:23:15,792 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-29 03:23:15,792 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-29 03:23:15,793 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-29 03:23:15,793 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:23:15,794 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:23:15,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-29 03:23:15,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 03:23:15,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-29 03:23:15,796 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-29 03:23:16,408 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:23:16,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:23:16,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:16,419 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:23:16,420 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:23:16,420 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:23:16,420 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-29 03:23:16,420 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:23:16,420 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:23:16,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:23:16,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:23:16,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:23:16,421 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 03:23:16,443 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 03:23:16,443 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2129882086] [2020-10-29 03:23:16,444 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:23:16,444 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-29 03:23:16,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182532356] [2020-10-29 03:23:16,446 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-29 03:23:16,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:23:16,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-29 03:23:16,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2020-10-29 03:23:16,451 INFO L87 Difference]: Start difference. First operand 51 states and 57 transitions. Second operand 17 states. [2020-10-29 03:23:17,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:23:17,252 INFO L93 Difference]: Finished difference Result 89 states and 100 transitions. [2020-10-29 03:23:17,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-29 03:23:17,254 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 49 [2020-10-29 03:23:17,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:23:17,255 INFO L225 Difference]: With dead ends: 89 [2020-10-29 03:23:17,255 INFO L226 Difference]: Without dead ends: 83 [2020-10-29 03:23:17,256 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 7 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2020-10-29 03:23:17,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-29 03:23:17,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 80. [2020-10-29 03:23:17,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-29 03:23:17,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 91 transitions. [2020-10-29 03:23:17,272 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 91 transitions. Word has length 49 [2020-10-29 03:23:17,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:23:17,272 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 91 transitions. [2020-10-29 03:23:17,272 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-29 03:23:17,272 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 91 transitions. [2020-10-29 03:23:17,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-29 03:23:17,274 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:23:17,275 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 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] [2020-10-29 03:23:17,275 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-29 03:23:17,275 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:23:17,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:23:17,276 INFO L82 PathProgramCache]: Analyzing trace with hash -44116372, now seen corresponding path program 3 times [2020-10-29 03:23:17,276 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:23:17,276 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [56699741] [2020-10-29 03:23:17,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:23:17,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:23:17,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:17,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:17,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:17,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:17,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:22,288 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:23:22,289 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-29 03:23:22,290 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 03:23:22,290 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-29 03:23:22,291 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:23:22,291 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:23:22,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-29 03:23:22,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-29 03:23:22,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-29 03:23:22,299 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 7 [2020-10-29 03:23:22,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:23:22,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:23:22,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:22,423 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:23:22,424 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:23:22,424 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:23:22,424 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 03:23:22,425 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:23:22,425 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:23:22,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:23:22,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:23:22,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:23:22,425 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:23:22,434 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-29 03:23:22,434 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [56699741] [2020-10-29 03:23:22,434 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:23:22,435 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-29 03:23:22,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47224318] [2020-10-29 03:23:22,435 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-29 03:23:22,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:23:22,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-29 03:23:22,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-29 03:23:22,437 INFO L87 Difference]: Start difference. First operand 80 states and 91 transitions. Second operand 10 states. [2020-10-29 03:23:23,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:23:23,108 INFO L93 Difference]: Finished difference Result 123 states and 142 transitions. [2020-10-29 03:23:23,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-29 03:23:23,108 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 51 [2020-10-29 03:23:23,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:23:23,110 INFO L225 Difference]: With dead ends: 123 [2020-10-29 03:23:23,110 INFO L226 Difference]: Without dead ends: 93 [2020-10-29 03:23:23,111 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2020-10-29 03:23:23,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-29 03:23:23,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 82. [2020-10-29 03:23:23,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-29 03:23:23,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 92 transitions. [2020-10-29 03:23:23,126 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 92 transitions. Word has length 51 [2020-10-29 03:23:23,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:23:23,126 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 92 transitions. [2020-10-29 03:23:23,126 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-29 03:23:23,127 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 92 transitions. [2020-10-29 03:23:23,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-29 03:23:23,128 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:23:23,130 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 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] [2020-10-29 03:23:23,130 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-29 03:23:23,131 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:23:23,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:23:23,131 INFO L82 PathProgramCache]: Analyzing trace with hash -906571988, now seen corresponding path program 4 times [2020-10-29 03:23:23,132 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:23:23,132 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [985445485] [2020-10-29 03:23:23,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:23:23,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:23:23,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:23,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:23,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:23,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:23,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:25,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:28,147 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:23:28,147 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-29 03:23:28,147 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 03:23:28,148 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-29 03:23:28,148 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:23:28,148 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:23:28,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-29 03:23:28,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-29 03:23:28,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-29 03:23:28,149 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:23:28,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:23:28,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:23:28,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:28,275 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:23:28,275 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:23:28,275 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:23:28,275 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 03:23:28,276 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:23:28,276 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:23:28,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:23:28,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:23:28,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:23:28,277 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 03:23:28,284 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-29 03:23:28,285 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [985445485] [2020-10-29 03:23:28,285 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:23:28,285 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-29 03:23:28,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125230070] [2020-10-29 03:23:28,288 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-29 03:23:28,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:23:28,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-29 03:23:28,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-29 03:23:28,295 INFO L87 Difference]: Start difference. First operand 82 states and 92 transitions. Second operand 10 states. [2020-10-29 03:23:28,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:23:28,753 INFO L93 Difference]: Finished difference Result 139 states and 154 transitions. [2020-10-29 03:23:28,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-29 03:23:28,754 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 51 [2020-10-29 03:23:28,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:23:28,755 INFO L225 Difference]: With dead ends: 139 [2020-10-29 03:23:28,755 INFO L226 Difference]: Without dead ends: 69 [2020-10-29 03:23:28,756 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2020-10-29 03:23:28,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-29 03:23:28,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 63. [2020-10-29 03:23:28,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-29 03:23:28,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 69 transitions. [2020-10-29 03:23:28,772 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 69 transitions. Word has length 51 [2020-10-29 03:23:28,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:23:28,773 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 69 transitions. [2020-10-29 03:23:28,773 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-29 03:23:28,773 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 69 transitions. [2020-10-29 03:23:28,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-29 03:23:28,774 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:23:28,776 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-29 03:23:28,776 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-29 03:23:28,776 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:23:28,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:23:28,777 INFO L82 PathProgramCache]: Analyzing trace with hash 415950966, now seen corresponding path program 5 times [2020-10-29 03:23:28,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:23:28,778 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [703623744] [2020-10-29 03:23:28,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:23:28,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:23:28,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:28,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:29,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:30,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:32,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:33,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:33,788 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:23:33,788 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-29 03:23:33,789 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 03:23:33,789 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-29 03:23:33,789 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:23:33,789 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:23:33,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 42 [2020-10-29 03:23:33,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 03:23:33,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-29 03:23:33,790 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:23:36,156 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:23:36,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:23:36,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:36,164 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:23:36,165 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:23:36,165 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:23:36,165 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 03:23:36,165 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:23:36,165 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:23:36,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:23:36,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:23:36,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:23:36,166 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:23:36,201 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 03:23:36,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [703623744] [2020-10-29 03:23:36,202 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:23:36,202 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-29 03:23:36,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141776162] [2020-10-29 03:23:36,203 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-29 03:23:36,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:23:36,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-29 03:23:36,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=1164, Unknown=0, NotChecked=0, Total=1260 [2020-10-29 03:23:36,205 INFO L87 Difference]: Start difference. First operand 63 states and 69 transitions. Second operand 36 states. [2020-10-29 03:23:36,761 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 42 [2020-10-29 03:23:37,305 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 52 [2020-10-29 03:23:37,776 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 48 [2020-10-29 03:23:39,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:23:39,770 INFO L93 Difference]: Finished difference Result 117 states and 128 transitions. [2020-10-29 03:23:39,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-29 03:23:39,771 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 61 [2020-10-29 03:23:39,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:23:39,772 INFO L225 Difference]: With dead ends: 117 [2020-10-29 03:23:39,772 INFO L226 Difference]: Without dead ends: 111 [2020-10-29 03:23:39,774 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 8 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 484 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=192, Invalid=2258, Unknown=0, NotChecked=0, Total=2450 [2020-10-29 03:23:39,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-29 03:23:39,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 100. [2020-10-29 03:23:39,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-29 03:23:39,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 111 transitions. [2020-10-29 03:23:39,792 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 111 transitions. Word has length 61 [2020-10-29 03:23:39,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:23:39,792 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 111 transitions. [2020-10-29 03:23:39,793 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-29 03:23:39,793 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 111 transitions. [2020-10-29 03:23:39,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-29 03:23:39,794 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:23:39,794 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 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] [2020-10-29 03:23:39,795 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-29 03:23:39,795 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:23:39,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:23:39,795 INFO L82 PathProgramCache]: Analyzing trace with hash 367863608, now seen corresponding path program 6 times [2020-10-29 03:23:39,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:23:39,796 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [511559098] [2020-10-29 03:23:39,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:23:39,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:23:39,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:39,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:39,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:39,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:40,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:44,809 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:23:44,810 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-29 03:23:44,810 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 03:23:44,810 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-29 03:23:44,810 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:23:44,810 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:23:44,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-29 03:23:44,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-10-29 03:23:44,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-29 03:23:44,811 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:23:44,957 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:23:44,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:23:44,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:44,965 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:23:44,966 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:23:44,966 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:23:44,966 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 03:23:44,966 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:23:44,966 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:23:44,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:23:44,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:23:44,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:23:44,967 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:23:44,977 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-29 03:23:44,977 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [511559098] [2020-10-29 03:23:44,978 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:23:44,978 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-29 03:23:44,978 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971928780] [2020-10-29 03:23:44,979 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-29 03:23:44,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:23:44,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-29 03:23:44,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-29 03:23:44,981 INFO L87 Difference]: Start difference. First operand 100 states and 111 transitions. Second operand 12 states. [2020-10-29 03:23:45,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:23:45,765 INFO L93 Difference]: Finished difference Result 153 states and 172 transitions. [2020-10-29 03:23:45,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-29 03:23:45,766 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 63 [2020-10-29 03:23:45,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:23:45,768 INFO L225 Difference]: With dead ends: 153 [2020-10-29 03:23:45,769 INFO L226 Difference]: Without dead ends: 115 [2020-10-29 03:23:45,770 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2020-10-29 03:23:45,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-29 03:23:45,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 100. [2020-10-29 03:23:45,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-29 03:23:45,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 110 transitions. [2020-10-29 03:23:45,806 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 110 transitions. Word has length 63 [2020-10-29 03:23:45,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:23:45,807 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 110 transitions. [2020-10-29 03:23:45,807 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-29 03:23:45,810 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 110 transitions. [2020-10-29 03:23:45,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-29 03:23:45,817 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:23:45,817 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 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] [2020-10-29 03:23:45,817 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-29 03:23:45,817 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:23:45,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:23:45,818 INFO L82 PathProgramCache]: Analyzing trace with hash 729202680, now seen corresponding path program 7 times [2020-10-29 03:23:45,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:23:45,818 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1222957430] [2020-10-29 03:23:45,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:23:45,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:23:45,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:45,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:45,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:45,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:45,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:47,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:50,841 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:23:50,841 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-29 03:23:50,842 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 03:23:50,842 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-29 03:23:50,842 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:23:50,842 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:23:50,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-29 03:23:50,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-29 03:23:50,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-29 03:23:50,842 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:23:50,973 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:23:50,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:23:50,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:50,980 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:23:50,981 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:23:50,981 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:23:50,981 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 03:23:50,981 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:23:50,981 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:23:50,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:23:50,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:23:50,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:23:50,982 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:23:50,989 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-29 03:23:50,990 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1222957430] [2020-10-29 03:23:50,990 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:23:50,990 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-29 03:23:50,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136242640] [2020-10-29 03:23:50,991 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-29 03:23:50,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:23:50,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-29 03:23:50,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-29 03:23:50,992 INFO L87 Difference]: Start difference. First operand 100 states and 110 transitions. Second operand 12 states. [2020-10-29 03:23:51,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:23:51,546 INFO L93 Difference]: Finished difference Result 169 states and 184 transitions. [2020-10-29 03:23:51,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-29 03:23:51,547 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 63 [2020-10-29 03:23:51,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:23:51,549 INFO L225 Difference]: With dead ends: 169 [2020-10-29 03:23:51,549 INFO L226 Difference]: Without dead ends: 81 [2020-10-29 03:23:51,550 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-10-29 03:23:51,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-29 03:23:51,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 75. [2020-10-29 03:23:51,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-29 03:23:51,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 81 transitions. [2020-10-29 03:23:51,563 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 81 transitions. Word has length 63 [2020-10-29 03:23:51,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:23:51,563 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 81 transitions. [2020-10-29 03:23:51,563 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-29 03:23:51,563 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 81 transitions. [2020-10-29 03:23:51,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-29 03:23:51,565 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:23:51,565 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-29 03:23:51,565 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-29 03:23:51,565 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:23:51,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:23:51,566 INFO L82 PathProgramCache]: Analyzing trace with hash 1060796994, now seen corresponding path program 8 times [2020-10-29 03:23:51,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:23:51,566 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [814527443] [2020-10-29 03:23:51,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:23:51,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:23:51,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:51,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:52,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:53,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:55,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:56,606 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:23:56,606 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-29 03:23:56,606 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 03:23:56,606 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5023 [2020-10-29 03:23:56,607 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:23:56,607 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:23:56,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 54 [2020-10-29 03:23:56,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 03:23:56,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 67 [2020-10-29 03:23:56,607 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:24:01,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:24:01,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:24:01,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:24:01,022 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:24:01,022 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:24:01,022 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:24:01,022 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 03:24:01,022 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:24:01,023 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:24:01,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:24:01,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:24:01,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:24:01,023 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:24:01,073 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 03:24:01,074 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [814527443] [2020-10-29 03:24:01,074 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:24:01,074 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2020-10-29 03:24:01,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049280593] [2020-10-29 03:24:01,075 INFO L461 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-10-29 03:24:01,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:24:01,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-10-29 03:24:01,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=2627, Unknown=0, NotChecked=0, Total=2756 [2020-10-29 03:24:01,078 INFO L87 Difference]: Start difference. First operand 75 states and 81 transitions. Second operand 53 states. [2020-10-29 03:24:04,509 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 55 [2020-10-29 03:24:05,026 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 58 [2020-10-29 03:24:06,969 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 59 [2020-10-29 03:24:07,428 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 58 [2020-10-29 03:24:07,890 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 55 [2020-10-29 03:24:10,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:24:10,306 INFO L93 Difference]: Finished difference Result 133 states and 144 transitions. [2020-10-29 03:24:10,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-29 03:24:10,307 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 73 [2020-10-29 03:24:10,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:24:10,309 INFO L225 Difference]: With dead ends: 133 [2020-10-29 03:24:10,309 INFO L226 Difference]: Without dead ends: 127 [2020-10-29 03:24:10,315 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1119 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=386, Invalid=7446, Unknown=0, NotChecked=0, Total=7832 [2020-10-29 03:24:10,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-10-29 03:24:10,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 120. [2020-10-29 03:24:10,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-29 03:24:10,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 131 transitions. [2020-10-29 03:24:10,339 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 131 transitions. Word has length 73 [2020-10-29 03:24:10,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:24:10,341 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 131 transitions. [2020-10-29 03:24:10,341 INFO L482 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-10-29 03:24:10,341 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 131 transitions. [2020-10-29 03:24:10,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-29 03:24:10,351 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:24:10,351 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 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] [2020-10-29 03:24:10,351 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-29 03:24:10,351 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:24:10,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:24:10,353 INFO L82 PathProgramCache]: Analyzing trace with hash -6957564, now seen corresponding path program 9 times [2020-10-29 03:24:10,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:24:10,353 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1754037570] [2020-10-29 03:24:10,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:24:10,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:24:10,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:24:10,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:24:10,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:24:10,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:24:11,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:24:15,369 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:24:15,370 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-29 03:24:15,370 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 03:24:15,370 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-29 03:24:15,370 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:24:15,370 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:24:15,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-29 03:24:15,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-29 03:24:15,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-29 03:24:15,371 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:24:15,549 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:24:15,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:24:15,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:24:15,559 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:24:15,560 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:24:15,560 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:24:15,560 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-29 03:24:15,561 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:24:15,561 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:24:15,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:24:15,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:24:15,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:24:15,562 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 03:24:15,576 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-10-29 03:24:15,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1754037570] [2020-10-29 03:24:15,577 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:24:15,577 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-29 03:24:15,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681115103] [2020-10-29 03:24:15,578 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-29 03:24:15,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:24:15,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-29 03:24:15,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-29 03:24:15,580 INFO L87 Difference]: Start difference. First operand 120 states and 131 transitions. Second operand 14 states. [2020-10-29 03:24:16,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:24:16,532 INFO L93 Difference]: Finished difference Result 237 states and 260 transitions. [2020-10-29 03:24:16,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-29 03:24:16,533 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 75 [2020-10-29 03:24:16,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:24:16,534 INFO L225 Difference]: With dead ends: 237 [2020-10-29 03:24:16,535 INFO L226 Difference]: Without dead ends: 139 [2020-10-29 03:24:16,536 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2020-10-29 03:24:16,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-10-29 03:24:16,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 125. [2020-10-29 03:24:16,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-10-29 03:24:16,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 135 transitions. [2020-10-29 03:24:16,550 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 135 transitions. Word has length 75 [2020-10-29 03:24:16,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:24:16,551 INFO L481 AbstractCegarLoop]: Abstraction has 125 states and 135 transitions. [2020-10-29 03:24:16,551 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-29 03:24:16,551 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 135 transitions. [2020-10-29 03:24:16,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-29 03:24:16,552 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:24:16,552 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 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] [2020-10-29 03:24:16,552 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-29 03:24:16,552 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:24:16,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:24:16,553 INFO L82 PathProgramCache]: Analyzing trace with hash -832858748, now seen corresponding path program 10 times [2020-10-29 03:24:16,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:24:16,553 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2145461695] [2020-10-29 03:24:16,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:24:16,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:24:16,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:24:16,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:24:16,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:24:16,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:24:17,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:24:21,563 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:24:21,564 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-29 03:24:21,564 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 03:24:21,564 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-29 03:24:21,564 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:24:21,564 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:24:21,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-29 03:24:21,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-29 03:24:21,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-29 03:24:21,564 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:24:21,760 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:24:21,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:24:21,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:24:21,766 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:24:21,766 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:24:21,766 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:24:21,766 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 03:24:21,766 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:24:21,767 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:24:21,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:24:21,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:24:21,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:24:21,767 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:24:21,782 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-10-29 03:24:21,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2145461695] [2020-10-29 03:24:21,783 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:24:21,783 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-29 03:24:21,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447878210] [2020-10-29 03:24:21,784 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-29 03:24:21,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:24:21,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-29 03:24:21,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-29 03:24:21,785 INFO L87 Difference]: Start difference. First operand 125 states and 135 transitions. Second operand 14 states. [2020-10-29 03:24:22,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:24:22,540 INFO L93 Difference]: Finished difference Result 133 states and 143 transitions. [2020-10-29 03:24:22,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-29 03:24:22,541 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 75 [2020-10-29 03:24:22,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:24:22,542 INFO L225 Difference]: With dead ends: 133 [2020-10-29 03:24:22,542 INFO L226 Difference]: Without dead ends: 87 [2020-10-29 03:24:22,543 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=145, Invalid=455, Unknown=0, NotChecked=0, Total=600 [2020-10-29 03:24:22,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-29 03:24:22,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2020-10-29 03:24:22,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-29 03:24:22,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 93 transitions. [2020-10-29 03:24:22,558 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 93 transitions. Word has length 75 [2020-10-29 03:24:22,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:24:22,558 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 93 transitions. [2020-10-29 03:24:22,559 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-29 03:24:22,559 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 93 transitions. [2020-10-29 03:24:22,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-29 03:24:22,559 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:24:22,560 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-29 03:24:22,560 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-29 03:24:22,560 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:24:22,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:24:22,561 INFO L82 PathProgramCache]: Analyzing trace with hash -1787106802, now seen corresponding path program 11 times [2020-10-29 03:24:22,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:24:22,561 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [385004151] [2020-10-29 03:24:22,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:24:22,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:24:22,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:24:22,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:24:23,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:24:25,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:24:27,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:24:27,963 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:24:27,963 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-29 03:24:27,963 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 03:24:27,963 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5392 [2020-10-29 03:24:27,964 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:24:27,964 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:24:27,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 66 [2020-10-29 03:24:27,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 03:24:27,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 79 [2020-10-29 03:24:27,964 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:24:33,079 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:24:33,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:24:33,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:24:33,087 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:24:33,087 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:24:33,087 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:24:33,087 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 03:24:33,087 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:24:33,088 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:24:33,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:24:33,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:24:33,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:24:33,088 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:24:33,135 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 150 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 03:24:33,135 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [385004151] [2020-10-29 03:24:33,135 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:24:33,135 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51] total 51 [2020-10-29 03:24:33,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011611514] [2020-10-29 03:24:33,136 INFO L461 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-10-29 03:24:33,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:24:33,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-10-29 03:24:33,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=2421, Unknown=0, NotChecked=0, Total=2550 [2020-10-29 03:24:33,138 INFO L87 Difference]: Start difference. First operand 87 states and 93 transitions. Second operand 51 states. [2020-10-29 03:24:33,550 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 47 [2020-10-29 03:24:34,836 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 58 [2020-10-29 03:24:35,465 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2020-10-29 03:24:39,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:24:39,477 INFO L93 Difference]: Finished difference Result 161 states and 172 transitions. [2020-10-29 03:24:39,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-29 03:24:39,479 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 85 [2020-10-29 03:24:39,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:24:39,481 INFO L225 Difference]: With dead ends: 161 [2020-10-29 03:24:39,481 INFO L226 Difference]: Without dead ends: 155 [2020-10-29 03:24:39,483 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 12 SyntacticMatches, 8 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 652 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=263, Invalid=4707, Unknown=0, NotChecked=0, Total=4970 [2020-10-29 03:24:39,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-10-29 03:24:39,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 140. [2020-10-29 03:24:39,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-29 03:24:39,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 151 transitions. [2020-10-29 03:24:39,498 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 151 transitions. Word has length 85 [2020-10-29 03:24:39,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:24:39,499 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 151 transitions. [2020-10-29 03:24:39,499 INFO L482 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-10-29 03:24:39,499 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 151 transitions. [2020-10-29 03:24:39,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-29 03:24:39,500 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:24:39,500 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 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] [2020-10-29 03:24:39,500 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-29 03:24:39,500 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:24:39,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:24:39,501 INFO L82 PathProgramCache]: Analyzing trace with hash 1981276880, now seen corresponding path program 12 times [2020-10-29 03:24:39,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:24:39,501 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [984729307] [2020-10-29 03:24:39,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:24:39,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:24:39,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:24:39,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:24:39,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:24:39,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:24:40,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:24:44,517 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:24:44,518 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 97 [2020-10-29 03:24:44,518 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 03:24:44,518 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-29 03:24:44,518 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:24:44,518 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:24:44,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-29 03:24:44,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 38 [2020-10-29 03:24:44,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-29 03:24:44,519 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:24:44,769 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:24:44,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:24:44,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:24:44,775 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:24:44,775 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:24:44,776 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:24:44,776 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 03:24:44,776 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:24:44,776 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:24:44,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:24:44,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:24:44,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:24:44,777 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:24:44,784 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-10-29 03:24:44,785 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [984729307] [2020-10-29 03:24:44,785 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:24:44,785 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-29 03:24:44,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447342556] [2020-10-29 03:24:44,786 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-29 03:24:44,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:24:44,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-29 03:24:44,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2020-10-29 03:24:44,787 INFO L87 Difference]: Start difference. First operand 140 states and 151 transitions. Second operand 16 states. [2020-10-29 03:24:46,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:24:46,466 INFO L93 Difference]: Finished difference Result 213 states and 232 transitions. [2020-10-29 03:24:46,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-29 03:24:46,467 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 87 [2020-10-29 03:24:46,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:24:46,469 INFO L225 Difference]: With dead ends: 213 [2020-10-29 03:24:46,469 INFO L226 Difference]: Without dead ends: 159 [2020-10-29 03:24:46,471 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=193, Invalid=619, Unknown=0, NotChecked=0, Total=812 [2020-10-29 03:24:46,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-10-29 03:24:46,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 136. [2020-10-29 03:24:46,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-10-29 03:24:46,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 146 transitions. [2020-10-29 03:24:46,487 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 146 transitions. Word has length 87 [2020-10-29 03:24:46,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:24:46,487 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 146 transitions. [2020-10-29 03:24:46,487 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-29 03:24:46,488 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 146 transitions. [2020-10-29 03:24:46,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-29 03:24:46,488 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:24:46,489 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 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] [2020-10-29 03:24:46,489 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-29 03:24:46,489 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:24:46,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:24:46,490 INFO L82 PathProgramCache]: Analyzing trace with hash 1009564560, now seen corresponding path program 13 times [2020-10-29 03:24:46,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:24:46,490 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1560228278] [2020-10-29 03:24:46,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:24:46,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:24:46,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:24:46,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:24:46,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:24:46,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:24:46,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:24:51,503 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:24:51,503 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 97 [2020-10-29 03:24:51,503 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 03:24:51,503 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-29 03:24:51,504 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:24:51,504 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:24:51,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-29 03:24:51,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-29 03:24:51,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-29 03:24:51,504 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:24:51,754 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:24:51,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:24:51,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:24:51,761 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:24:51,762 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:24:51,762 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:24:51,762 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 03:24:51,762 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:24:51,763 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:24:51,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:24:51,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:24:51,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:24:51,764 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 03:24:51,786 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-10-29 03:24:51,786 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1560228278] [2020-10-29 03:24:51,787 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:24:51,787 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-29 03:24:51,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521441961] [2020-10-29 03:24:51,787 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-29 03:24:51,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:24:51,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-29 03:24:51,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2020-10-29 03:24:51,789 INFO L87 Difference]: Start difference. First operand 136 states and 146 transitions. Second operand 16 states. [2020-10-29 03:24:52,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:24:52,799 INFO L93 Difference]: Finished difference Result 229 states and 244 transitions. [2020-10-29 03:24:52,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-29 03:24:52,800 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 87 [2020-10-29 03:24:52,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:24:52,801 INFO L225 Difference]: With dead ends: 229 [2020-10-29 03:24:52,802 INFO L226 Difference]: Without dead ends: 105 [2020-10-29 03:24:52,803 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=123, Invalid=383, Unknown=0, NotChecked=0, Total=506 [2020-10-29 03:24:52,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-29 03:24:52,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 99. [2020-10-29 03:24:52,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-29 03:24:52,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 105 transitions. [2020-10-29 03:24:52,815 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 105 transitions. Word has length 87 [2020-10-29 03:24:52,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:24:52,816 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 105 transitions. [2020-10-29 03:24:52,816 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-29 03:24:52,816 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 105 transitions. [2020-10-29 03:24:52,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-10-29 03:24:52,817 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:24:52,817 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-29 03:24:52,817 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-29 03:24:52,817 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:24:52,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:24:52,818 INFO L82 PathProgramCache]: Analyzing trace with hash -1819592742, now seen corresponding path program 14 times [2020-10-29 03:24:52,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:24:52,818 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1927074652] [2020-10-29 03:24:52,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:24:52,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:24:52,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:24:52,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:24:54,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:24:56,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:24:57,828 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:24:57,828 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 107 [2020-10-29 03:24:57,829 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 03:24:57,829 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-29 03:24:57,829 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:24:57,829 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:24:57,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 76 [2020-10-29 03:24:57,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 03:24:57,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 91 [2020-10-29 03:24:57,829 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:25:02,765 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:25:02,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:25:02,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:25:02,774 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:25:02,774 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:25:02,774 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:25:02,775 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 03:25:02,775 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:25:02,775 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:25:02,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:25:02,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:25:02,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:25:02,775 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:25:02,847 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 0 proven. 216 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 03:25:02,847 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1927074652] [2020-10-29 03:25:02,847 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:25:02,847 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-29 03:25:02,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072687205] [2020-10-29 03:25:02,848 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-29 03:25:02,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:25:02,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-29 03:25:02,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=1545, Unknown=0, NotChecked=0, Total=1640 [2020-10-29 03:25:02,850 INFO L87 Difference]: Start difference. First operand 99 states and 105 transitions. Second operand 41 states. [2020-10-29 03:25:06,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:25:06,314 INFO L93 Difference]: Finished difference Result 177 states and 188 transitions. [2020-10-29 03:25:06,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-29 03:25:06,316 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 97 [2020-10-29 03:25:06,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:25:06,318 INFO L225 Difference]: With dead ends: 177 [2020-10-29 03:25:06,318 INFO L226 Difference]: Without dead ends: 171 [2020-10-29 03:25:06,320 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 5 SyntacticMatches, 35 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=105, Invalid=1701, Unknown=0, NotChecked=0, Total=1806 [2020-10-29 03:25:06,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2020-10-29 03:25:06,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 160. [2020-10-29 03:25:06,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-10-29 03:25:06,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 171 transitions. [2020-10-29 03:25:06,339 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 171 transitions. Word has length 97 [2020-10-29 03:25:06,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:25:06,339 INFO L481 AbstractCegarLoop]: Abstraction has 160 states and 171 transitions. [2020-10-29 03:25:06,340 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-29 03:25:06,340 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 171 transitions. [2020-10-29 03:25:06,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-10-29 03:25:06,341 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:25:06,341 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 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] [2020-10-29 03:25:06,341 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-29 03:25:06,341 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:25:06,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:25:06,342 INFO L82 PathProgramCache]: Analyzing trace with hash -1850585700, now seen corresponding path program 15 times [2020-10-29 03:25:06,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:25:06,342 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1605829878] [2020-10-29 03:25:06,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:25:06,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:25:06,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:25:06,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:25:06,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:25:06,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:25:07,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:25:11,353 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:25:11,354 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 109 [2020-10-29 03:25:11,354 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 03:25:11,354 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-29 03:25:11,354 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:25:11,354 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:25:11,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-29 03:25:11,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 42 [2020-10-29 03:25:11,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-29 03:25:11,354 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:25:11,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:25:11,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:25:11,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:25:11,663 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:25:11,663 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:25:11,663 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:25:11,664 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 03:25:11,664 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:25:11,664 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:25:11,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:25:11,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:25:11,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:25:11,664 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:25:11,675 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 36 proven. 49 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2020-10-29 03:25:11,675 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1605829878] [2020-10-29 03:25:11,675 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:25:11,676 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-29 03:25:11,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540180059] [2020-10-29 03:25:11,676 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-29 03:25:11,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:25:11,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-29 03:25:11,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2020-10-29 03:25:11,677 INFO L87 Difference]: Start difference. First operand 160 states and 171 transitions. Second operand 18 states. [2020-10-29 03:25:13,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:25:13,509 INFO L93 Difference]: Finished difference Result 243 states and 262 transitions. [2020-10-29 03:25:13,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-29 03:25:13,510 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 99 [2020-10-29 03:25:13,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:25:13,512 INFO L225 Difference]: With dead ends: 243 [2020-10-29 03:25:13,513 INFO L226 Difference]: Without dead ends: 181 [2020-10-29 03:25:13,514 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=248, Invalid=808, Unknown=0, NotChecked=0, Total=1056 [2020-10-29 03:25:13,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2020-10-29 03:25:13,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 154. [2020-10-29 03:25:13,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-10-29 03:25:13,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 164 transitions. [2020-10-29 03:25:13,534 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 164 transitions. Word has length 99 [2020-10-29 03:25:13,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:25:13,534 INFO L481 AbstractCegarLoop]: Abstraction has 154 states and 164 transitions. [2020-10-29 03:25:13,534 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-29 03:25:13,534 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 164 transitions. [2020-10-29 03:25:13,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-10-29 03:25:13,535 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:25:13,536 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 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] [2020-10-29 03:25:13,536 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-29 03:25:13,536 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:25:13,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:25:13,537 INFO L82 PathProgramCache]: Analyzing trace with hash -144652708, now seen corresponding path program 16 times [2020-10-29 03:25:13,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:25:13,537 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1546612755] [2020-10-29 03:25:13,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:25:13,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:25:13,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:25:13,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:25:13,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:25:13,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:25:13,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:25:18,549 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:25:18,550 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 109 [2020-10-29 03:25:18,550 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 03:25:18,550 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-29 03:25:18,550 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:25:18,550 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:25:18,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-29 03:25:18,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-29 03:25:18,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-29 03:25:18,550 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:25:18,843 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:25:18,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:25:18,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:25:18,848 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:25:18,848 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:25:18,849 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:25:18,849 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 03:25:18,849 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:25:18,849 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:25:18,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:25:18,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:25:18,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:25:18,850 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:25:18,874 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2020-10-29 03:25:18,875 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1546612755] [2020-10-29 03:25:18,875 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:25:18,875 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-29 03:25:18,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605749416] [2020-10-29 03:25:18,876 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-29 03:25:18,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:25:18,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-29 03:25:18,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2020-10-29 03:25:18,877 INFO L87 Difference]: Start difference. First operand 154 states and 164 transitions. Second operand 18 states. [2020-10-29 03:25:20,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:25:20,068 INFO L93 Difference]: Finished difference Result 259 states and 274 transitions. [2020-10-29 03:25:20,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-29 03:25:20,069 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 99 [2020-10-29 03:25:20,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:25:20,070 INFO L225 Difference]: With dead ends: 259 [2020-10-29 03:25:20,071 INFO L226 Difference]: Without dead ends: 117 [2020-10-29 03:25:20,072 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=156, Invalid=494, Unknown=0, NotChecked=0, Total=650 [2020-10-29 03:25:20,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-29 03:25:20,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 111. [2020-10-29 03:25:20,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-10-29 03:25:20,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 117 transitions. [2020-10-29 03:25:20,085 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 117 transitions. Word has length 99 [2020-10-29 03:25:20,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:25:20,086 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 117 transitions. [2020-10-29 03:25:20,086 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-29 03:25:20,086 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 117 transitions. [2020-10-29 03:25:20,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-10-29 03:25:20,086 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:25:20,087 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:25:20,087 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-29 03:25:20,087 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:25:20,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:25:20,087 INFO L82 PathProgramCache]: Analyzing trace with hash -1377147994, now seen corresponding path program 17 times [2020-10-29 03:25:20,088 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:25:20,088 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [156094219] [2020-10-29 03:25:20,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:25:20,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:25:20,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:25:20,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:25:22,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:25:25,105 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:25:25,105 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 119 [2020-10-29 03:25:25,105 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 03:25:25,105 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-29 03:25:25,105 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:25:25,106 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:25:25,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 92 [2020-10-29 03:25:25,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 03:25:25,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 103 [2020-10-29 03:25:25,106 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:25:26,262 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 42 [2020-10-29 03:25:26,474 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 43 [2020-10-29 03:25:28,602 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 53 [2020-10-29 03:25:28,864 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 50 [2020-10-29 03:25:31,946 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 48 [2020-10-29 03:25:32,247 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 45 [2020-10-29 03:25:43,977 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:25:43,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:25:43,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:25:43,987 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:25:43,987 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:25:43,987 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:25:43,987 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 03:25:43,987 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:25:43,988 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:25:43,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:25:43,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:25:43,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:25:43,988 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:25:44,118 INFO L134 CoverageAnalysis]: Checked inductivity of 294 backedges. 0 proven. 294 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 03:25:44,118 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [156094219] [2020-10-29 03:25:44,119 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:25:44,119 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [92] total 92 [2020-10-29 03:25:44,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960107376] [2020-10-29 03:25:44,119 INFO L461 AbstractCegarLoop]: Interpolant automaton has 92 states [2020-10-29 03:25:44,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:25:44,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2020-10-29 03:25:44,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=8137, Unknown=0, NotChecked=0, Total=8372 [2020-10-29 03:25:44,123 INFO L87 Difference]: Start difference. First operand 111 states and 117 transitions. Second operand 92 states. [2020-10-29 03:25:45,394 WARN L193 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 79 [2020-10-29 03:25:46,155 WARN L193 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 82 [2020-10-29 03:25:46,890 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 82 [2020-10-29 03:25:47,598 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 82 [2020-10-29 03:25:48,345 WARN L193 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 82 [2020-10-29 03:25:49,135 WARN L193 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 86 [2020-10-29 03:25:51,963 WARN L193 SmtUtils]: Spent 1.42 s on a formula simplification. DAG size of input: 223 DAG size of output: 194 [2020-10-29 03:25:52,500 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 75 [2020-10-29 03:25:54,085 WARN L193 SmtUtils]: Spent 337.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 100 [2020-10-29 03:25:55,000 WARN L193 SmtUtils]: Spent 598.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 102 [2020-10-29 03:25:55,599 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 71 [2020-10-29 03:25:56,992 WARN L193 SmtUtils]: Spent 355.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 101 [2020-10-29 03:25:58,354 WARN L193 SmtUtils]: Spent 362.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 98 [2020-10-29 03:25:59,793 WARN L193 SmtUtils]: Spent 345.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 92 [2020-10-29 03:26:01,146 WARN L193 SmtUtils]: Spent 339.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 92 [2020-10-29 03:26:01,726 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 64 [2020-10-29 03:26:02,573 WARN L193 SmtUtils]: Spent 381.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 93 [2020-10-29 03:26:03,571 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 54 [2020-10-29 03:26:04,066 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 51 [2020-10-29 03:26:06,103 WARN L193 SmtUtils]: Spent 1.44 s on a formula simplification. DAG size of input: 208 DAG size of output: 170 [2020-10-29 03:26:07,478 WARN L193 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 81 [2020-10-29 03:26:08,740 WARN L193 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 85 [2020-10-29 03:26:09,992 WARN L193 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 82 [2020-10-29 03:26:11,321 WARN L193 SmtUtils]: Spent 332.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 78 [2020-10-29 03:26:24,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:26:24,955 INFO L93 Difference]: Finished difference Result 205 states and 216 transitions. [2020-10-29 03:26:24,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-10-29 03:26:24,958 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 109 [2020-10-29 03:26:24,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:26:24,960 INFO L225 Difference]: With dead ends: 205 [2020-10-29 03:26:24,960 INFO L226 Difference]: Without dead ends: 199 [2020-10-29 03:26:24,965 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2666 ImplicationChecksByTransitivity, 39.2s TimeCoverageRelationStatistics Valid=614, Invalid=16416, Unknown=0, NotChecked=0, Total=17030 [2020-10-29 03:26:24,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2020-10-29 03:26:24,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 180. [2020-10-29 03:26:24,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2020-10-29 03:26:24,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 191 transitions. [2020-10-29 03:26:24,989 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 191 transitions. Word has length 109 [2020-10-29 03:26:24,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:26:24,990 INFO L481 AbstractCegarLoop]: Abstraction has 180 states and 191 transitions. [2020-10-29 03:26:24,990 INFO L482 AbstractCegarLoop]: Interpolant automaton has 92 states. [2020-10-29 03:26:24,990 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 191 transitions. [2020-10-29 03:26:24,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-10-29 03:26:24,991 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:26:24,991 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:26:24,992 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-29 03:26:24,992 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:26:24,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:26:24,992 INFO L82 PathProgramCache]: Analyzing trace with hash -953936280, now seen corresponding path program 18 times [2020-10-29 03:26:24,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:26:24,993 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1684222606] [2020-10-29 03:26:24,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:26:25,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:26:25,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:26:25,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:26:25,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:26:25,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:26:27,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:26:30,005 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:26:30,005 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 121 [2020-10-29 03:26:30,005 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 03:26:30,005 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-29 03:26:30,006 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:26:30,006 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:26:30,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-29 03:26:30,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 46 [2020-10-29 03:26:30,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-29 03:26:30,006 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:26:30,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:26:30,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:26:30,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:26:30,671 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:26:30,671 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:26:30,672 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:26:30,672 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 03:26:30,672 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:26:30,672 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:26:30,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:26:30,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:26:30,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:26:30,672 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:26:30,683 INFO L134 CoverageAnalysis]: Checked inductivity of 309 backedges. 49 proven. 64 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2020-10-29 03:26:30,684 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1684222606] [2020-10-29 03:26:30,684 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:26:30,684 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-29 03:26:30,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743077141] [2020-10-29 03:26:30,685 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-29 03:26:30,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:26:30,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-29 03:26:30,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2020-10-29 03:26:30,686 INFO L87 Difference]: Start difference. First operand 180 states and 191 transitions. Second operand 20 states. [2020-10-29 03:26:35,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:26:35,504 INFO L93 Difference]: Finished difference Result 273 states and 292 transitions. [2020-10-29 03:26:35,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-29 03:26:35,507 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 111 [2020-10-29 03:26:35,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:26:35,509 INFO L225 Difference]: With dead ends: 273 [2020-10-29 03:26:35,509 INFO L226 Difference]: Without dead ends: 203 [2020-10-29 03:26:35,511 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=310, Invalid=1022, Unknown=0, NotChecked=0, Total=1332 [2020-10-29 03:26:35,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2020-10-29 03:26:35,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 172. [2020-10-29 03:26:35,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2020-10-29 03:26:35,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 182 transitions. [2020-10-29 03:26:35,536 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 182 transitions. Word has length 111 [2020-10-29 03:26:35,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:26:35,536 INFO L481 AbstractCegarLoop]: Abstraction has 172 states and 182 transitions. [2020-10-29 03:26:35,536 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-29 03:26:35,536 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 182 transitions. [2020-10-29 03:26:35,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-10-29 03:26:35,537 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:26:35,538 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:26:35,538 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-29 03:26:35,538 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:26:35,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:26:35,539 INFO L82 PathProgramCache]: Analyzing trace with hash -157012184, now seen corresponding path program 19 times [2020-10-29 03:26:35,539 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:26:35,539 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1658170532] [2020-10-29 03:26:35,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:26:35,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:26:35,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:26:35,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:26:35,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:26:35,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:26:35,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:26:40,553 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:26:40,553 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 121 [2020-10-29 03:26:40,554 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 03:26:40,554 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-29 03:26:40,554 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:26:40,554 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:26:40,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-29 03:26:40,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-29 03:26:40,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 96 [2020-10-29 03:26:40,555 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:26:41,258 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:26:41,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:26:41,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:26:41,264 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:26:41,264 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:26:41,264 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:26:41,265 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 03:26:41,265 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:26:41,265 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:26:41,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:26:41,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:26:41,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:26:41,265 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:26:41,282 INFO L134 CoverageAnalysis]: Checked inductivity of 309 backedges. 64 proven. 49 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2020-10-29 03:26:41,283 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1658170532] [2020-10-29 03:26:41,283 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:26:41,283 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-29 03:26:41,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395697063] [2020-10-29 03:26:41,284 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-29 03:26:41,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:26:41,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-29 03:26:41,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2020-10-29 03:26:41,286 INFO L87 Difference]: Start difference. First operand 172 states and 182 transitions. Second operand 20 states.