/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=SHALLOWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/loop-acceleration/array_2-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 01:29:18,917 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 01:29:18,920 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 01:29:18,955 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 01:29:18,955 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 01:29:18,957 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 01:29:18,959 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 01:29:18,961 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 01:29:18,964 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 01:29:18,965 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 01:29:18,967 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 01:29:18,968 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 01:29:18,969 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 01:29:18,970 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 01:29:18,971 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 01:29:18,973 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 01:29:18,974 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 01:29:18,975 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 01:29:18,977 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 01:29:18,979 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 01:29:18,981 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 01:29:18,983 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 01:29:18,985 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 01:29:18,986 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 01:29:19,010 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 01:29:19,011 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 01:29:19,017 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 01:29:19,018 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 01:29:19,019 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 01:29:19,022 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 01:29:19,023 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 01:29:19,023 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 01:29:19,035 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 01:29:19,036 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 01:29:19,040 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 01:29:19,042 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 01:29:19,043 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 01:29:19,044 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 01:29:19,044 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 01:29:19,045 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 01:29:19,046 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 01:29:19,048 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-27 01:29:19,075 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 01:29:19,075 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 01:29:19,077 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 01:29:19,077 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 01:29:19,077 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 01:29:19,077 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 01:29:19,078 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 01:29:19,078 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 01:29:19,078 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 01:29:19,078 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 01:29:19,078 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 01:29:19,079 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 01:29:19,079 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 01:29:19,079 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 01:29:19,079 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 01:29:19,079 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 01:29:19,080 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 01:29:19,080 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 01:29:19,080 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 01:29:19,080 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 01:29:19,080 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 01:29:19,081 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 01:29:19,081 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 01:29:19,081 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 01:29:19,081 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 01:29:19,082 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 01:29:19,082 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 01:29:19,082 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 01:29:19,082 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 01:29:19,082 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 01:29:19,538 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 01:29:19,567 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 01:29:19,570 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 01:29:19,572 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 01:29:19,573 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 01:29:19,574 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/array_2-2.i [2020-10-27 01:29:19,664 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4e0cefd11/d879e17535cf411ba411befcd37f8b6c/FLAG986a51128 [2020-10-27 01:29:20,385 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 01:29:20,386 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-acceleration/array_2-2.i [2020-10-27 01:29:20,395 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4e0cefd11/d879e17535cf411ba411befcd37f8b6c/FLAG986a51128 [2020-10-27 01:29:20,715 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4e0cefd11/d879e17535cf411ba411befcd37f8b6c [2020-10-27 01:29:20,718 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 01:29:20,726 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 01:29:20,728 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 01:29:20,728 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 01:29:20,734 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 01:29:20,735 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 01:29:20" (1/1) ... [2020-10-27 01:29:20,741 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1f911191 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:29:20, skipping insertion in model container [2020-10-27 01:29:20,742 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 01:29:20" (1/1) ... [2020-10-27 01:29:20,751 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 01:29:20,774 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 01:29:20,952 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 01:29:20,960 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 01:29:20,982 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 01:29:21,002 INFO L208 MainTranslator]: Completed translation [2020-10-27 01:29:21,003 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:29:21 WrapperNode [2020-10-27 01:29:21,004 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 01:29:21,005 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 01:29:21,006 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 01:29:21,006 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 01:29:21,019 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:29:21" (1/1) ... [2020-10-27 01:29:21,019 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:29:21" (1/1) ... [2020-10-27 01:29:21,028 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:29:21" (1/1) ... [2020-10-27 01:29:21,028 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:29:21" (1/1) ... [2020-10-27 01:29:21,037 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:29:21" (1/1) ... [2020-10-27 01:29:21,042 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:29:21" (1/1) ... [2020-10-27 01:29:21,044 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:29:21" (1/1) ... [2020-10-27 01:29:21,047 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 01:29:21,048 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 01:29:21,048 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 01:29:21,048 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 01:29:21,049 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:29:21" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 01:29:21,181 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 01:29:21,182 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 01:29:21,182 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 01:29:21,182 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-27 01:29:21,182 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 01:29:21,182 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 01:29:21,183 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 01:29:21,183 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-27 01:29:21,183 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-27 01:29:21,183 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 01:29:21,183 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 01:29:21,183 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 01:29:21,183 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-27 01:29:21,184 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 01:29:21,184 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 01:29:21,184 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 01:29:21,184 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 01:29:21,184 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 01:29:21,184 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 01:29:21,185 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 01:29:21,646 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 01:29:21,648 INFO L298 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-27 01:29:21,650 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 01:29:21 BoogieIcfgContainer [2020-10-27 01:29:21,650 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 01:29:21,655 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 01:29:21,655 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 01:29:21,660 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 01:29:21,661 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 01:29:20" (1/3) ... [2020-10-27 01:29:21,663 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5894512a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 01:29:21, skipping insertion in model container [2020-10-27 01:29:21,663 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:29:21" (2/3) ... [2020-10-27 01:29:21,664 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5894512a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 01:29:21, skipping insertion in model container [2020-10-27 01:29:21,664 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 01:29:21" (3/3) ... [2020-10-27 01:29:21,667 INFO L111 eAbstractionObserver]: Analyzing ICFG array_2-2.i [2020-10-27 01:29:21,683 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 01:29:21,689 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 01:29:21,706 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 01:29:21,748 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 01:29:21,749 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 01:29:21,749 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 01:29:21,749 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 01:29:21,749 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 01:29:21,749 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 01:29:21,749 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 01:29:21,750 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 01:29:21,775 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2020-10-27 01:29:21,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-27 01:29:21,785 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:29:21,786 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:29:21,786 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:29:21,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:29:21,799 INFO L82 PathProgramCache]: Analyzing trace with hash 1359145685, now seen corresponding path program 1 times [2020-10-27 01:29:21,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:29:21,811 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1131902761] [2020-10-27 01:29:21,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:29:21,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:29:22,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:29:22,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:29:22,189 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:29:22,189 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-27 01:29:22,190 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:29:22,190 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 189 [2020-10-27 01:29:22,196 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:29:22,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:29:22,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:29:22,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:29:22,197 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 7 [2020-10-27 01:29:22,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:29:22,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:29:22,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:29:22,386 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:29:22,387 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:29:22,390 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:29:22,391 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 49 [2020-10-27 01:29:22,391 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:29:22,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:29:22,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:29:22,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:29:22,392 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:29:22,417 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:29:22,418 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1131902761] [2020-10-27 01:29:22,422 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:29:22,423 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-27 01:29:22,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607828314] [2020-10-27 01:29:22,430 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-27 01:29:22,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:29:22,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-27 01:29:22,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-27 01:29:22,460 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 3 states. [2020-10-27 01:29:22,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:29:22,586 INFO L93 Difference]: Finished difference Result 47 states and 57 transitions. [2020-10-27 01:29:22,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-27 01:29:22,591 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2020-10-27 01:29:22,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:29:22,600 INFO L225 Difference]: With dead ends: 47 [2020-10-27 01:29:22,600 INFO L226 Difference]: Without dead ends: 19 [2020-10-27 01:29:22,606 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-27 01:29:22,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-10-27 01:29:22,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-10-27 01:29:22,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-27 01:29:22,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2020-10-27 01:29:22,661 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 16 [2020-10-27 01:29:22,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:29:22,663 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2020-10-27 01:29:22,663 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-27 01:29:22,663 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2020-10-27 01:29:22,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-27 01:29:22,665 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:29:22,666 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:29:22,667 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 01:29:22,667 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:29:22,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:29:22,668 INFO L82 PathProgramCache]: Analyzing trace with hash 671299297, now seen corresponding path program 1 times [2020-10-27 01:29:22,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:29:22,669 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2033959104] [2020-10-27 01:29:22,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:29:22,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:29:22,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:29:22,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:29:23,007 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:29:23,008 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-27 01:29:23,008 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:29:23,009 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 289 [2020-10-27 01:29:23,009 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:29:23,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:29:23,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:29:23,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 01:29:23,010 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:29:23,066 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:29:23,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:29:23,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:29:23,087 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:29:23,088 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:29:23,088 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:29:23,088 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-27 01:29:23,089 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:29:23,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:29:23,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:29:23,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:29:23,089 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:29:23,099 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:29:23,099 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2033959104] [2020-10-27 01:29:23,100 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:29:23,101 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 01:29:23,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060690965] [2020-10-27 01:29:23,107 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 01:29:23,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:29:23,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 01:29:23,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 01:29:23,114 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand 4 states. [2020-10-27 01:29:23,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:29:23,215 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2020-10-27 01:29:23,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 01:29:23,216 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2020-10-27 01:29:23,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:29:23,217 INFO L225 Difference]: With dead ends: 34 [2020-10-27 01:29:23,217 INFO L226 Difference]: Without dead ends: 23 [2020-10-27 01:29:23,218 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 01:29:23,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-10-27 01:29:23,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 21. [2020-10-27 01:29:23,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-27 01:29:23,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-10-27 01:29:23,233 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 16 [2020-10-27 01:29:23,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:29:23,234 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-10-27 01:29:23,234 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 01:29:23,236 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-10-27 01:29:23,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-27 01:29:23,237 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:29:23,237 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] [2020-10-27 01:29:23,237 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 01:29:23,237 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:29:23,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:29:23,238 INFO L82 PathProgramCache]: Analyzing trace with hash 1983033189, now seen corresponding path program 1 times [2020-10-27 01:29:23,238 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:29:23,239 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1091747684] [2020-10-27 01:29:23,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:29:23,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:29:23,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:29:23,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:29:23,615 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:29:23,616 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-27 01:29:23,616 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:29:23,616 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 356 [2020-10-27 01:29:23,616 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:29:23,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 01:29:23,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:29:23,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-27 01:29:23,618 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 01:29:23,708 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:29:23,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:29:23,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:29:23,720 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:29:23,720 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:29:23,720 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:29:23,721 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 01:29:23,721 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:29:23,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:29:23,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:29:23,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:29:23,722 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:29:23,726 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 01:29:23,727 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1091747684] [2020-10-27 01:29:23,727 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:29:23,727 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 01:29:23,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702141516] [2020-10-27 01:29:23,728 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 01:29:23,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:29:23,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 01:29:23,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 01:29:23,733 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 5 states. [2020-10-27 01:29:23,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:29:23,822 INFO L93 Difference]: Finished difference Result 39 states and 42 transitions. [2020-10-27 01:29:23,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 01:29:23,823 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2020-10-27 01:29:23,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:29:23,824 INFO L225 Difference]: With dead ends: 39 [2020-10-27 01:29:23,824 INFO L226 Difference]: Without dead ends: 27 [2020-10-27 01:29:23,825 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 01:29:23,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-27 01:29:23,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2020-10-27 01:29:23,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-27 01:29:23,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2020-10-27 01:29:23,832 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 20 [2020-10-27 01:29:23,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:29:23,833 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2020-10-27 01:29:23,833 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 01:29:23,833 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2020-10-27 01:29:23,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-27 01:29:23,834 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:29:23,834 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:29:23,835 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 01:29:23,835 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:29:23,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:29:23,836 INFO L82 PathProgramCache]: Analyzing trace with hash -432056855, now seen corresponding path program 2 times [2020-10-27 01:29:23,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:29:23,836 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [843327881] [2020-10-27 01:29:23,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:29:23,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:29:23,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:29:23,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:29:24,393 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:29:24,394 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-27 01:29:24,394 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:29:24,394 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 535 [2020-10-27 01:29:24,394 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:29:24,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 01:29:24,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:29:24,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 01:29:24,395 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:29:24,451 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:29:24,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:29:24,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:29:24,460 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:29:24,460 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:29:24,461 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:29:24,461 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:29:24,461 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:29:24,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:29:24,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:29:24,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:29:24,462 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:29:24,466 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-27 01:29:24,467 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [843327881] [2020-10-27 01:29:24,467 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:29:24,467 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 01:29:24,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933138634] [2020-10-27 01:29:24,468 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 01:29:24,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:29:24,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 01:29:24,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-27 01:29:24,469 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 6 states. [2020-10-27 01:29:24,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:29:24,556 INFO L93 Difference]: Finished difference Result 45 states and 48 transitions. [2020-10-27 01:29:24,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 01:29:24,557 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 24 [2020-10-27 01:29:24,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:29:24,558 INFO L225 Difference]: With dead ends: 45 [2020-10-27 01:29:24,558 INFO L226 Difference]: Without dead ends: 31 [2020-10-27 01:29:24,559 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-27 01:29:24,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-27 01:29:24,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2020-10-27 01:29:24,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-27 01:29:24,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2020-10-27 01:29:24,565 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 24 [2020-10-27 01:29:24,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:29:24,566 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2020-10-27 01:29:24,566 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 01:29:24,566 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2020-10-27 01:29:24,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-27 01:29:24,567 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:29:24,567 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:29:24,567 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 01:29:24,567 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:29:24,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:29:24,568 INFO L82 PathProgramCache]: Analyzing trace with hash 1490954861, now seen corresponding path program 3 times [2020-10-27 01:29:24,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:29:24,569 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [676963662] [2020-10-27 01:29:24,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:29:24,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:29:24,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:29:24,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:29:25,278 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:29:25,278 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-27 01:29:25,278 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:29:25,279 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 691 [2020-10-27 01:29:25,279 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:29:25,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 01:29:25,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:29:25,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-27 01:29:25,279 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:29:25,341 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:29:25,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:29:25,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:29:25,348 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:29:25,348 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:29:25,348 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:29:25,349 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:29:25,349 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:29:25,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:29:25,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:29:25,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:29:25,350 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:29:25,354 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-27 01:29:25,355 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [676963662] [2020-10-27 01:29:25,355 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:29:25,355 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 01:29:25,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108484962] [2020-10-27 01:29:25,356 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 01:29:25,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:29:25,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 01:29:25,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-27 01:29:25,357 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 7 states. [2020-10-27 01:29:25,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:29:25,445 INFO L93 Difference]: Finished difference Result 51 states and 54 transitions. [2020-10-27 01:29:25,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 01:29:25,446 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 28 [2020-10-27 01:29:25,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:29:25,447 INFO L225 Difference]: With dead ends: 51 [2020-10-27 01:29:25,447 INFO L226 Difference]: Without dead ends: 35 [2020-10-27 01:29:25,448 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-27 01:29:25,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-27 01:29:25,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2020-10-27 01:29:25,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-27 01:29:25,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2020-10-27 01:29:25,456 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 28 [2020-10-27 01:29:25,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:29:25,456 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2020-10-27 01:29:25,456 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 01:29:25,456 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2020-10-27 01:29:25,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-27 01:29:25,457 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:29:25,458 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:29:25,458 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 01:29:25,458 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:29:25,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:29:25,459 INFO L82 PathProgramCache]: Analyzing trace with hash 2101619953, now seen corresponding path program 4 times [2020-10-27 01:29:25,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:29:25,459 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1718713228] [2020-10-27 01:29:25,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:29:25,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:29:25,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:29:25,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:29:26,878 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:29:26,878 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-27 01:29:26,878 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:29:26,879 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1401 [2020-10-27 01:29:26,879 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:29:26,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 01:29:26,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:29:26,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 01:29:26,879 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:29:26,963 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:29:26,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:29:26,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:29:26,975 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:29:26,976 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:29:26,976 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:29:26,976 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 01:29:26,976 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:29:26,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:29:26,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:29:26,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:29:26,977 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:29:26,986 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-27 01:29:26,987 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1718713228] [2020-10-27 01:29:26,988 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:29:26,988 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 01:29:26,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526064286] [2020-10-27 01:29:26,989 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 01:29:26,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:29:26,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 01:29:26,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-27 01:29:26,993 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 8 states. [2020-10-27 01:29:27,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:29:27,162 INFO L93 Difference]: Finished difference Result 57 states and 60 transitions. [2020-10-27 01:29:27,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 01:29:27,164 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 32 [2020-10-27 01:29:27,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:29:27,165 INFO L225 Difference]: With dead ends: 57 [2020-10-27 01:29:27,165 INFO L226 Difference]: Without dead ends: 39 [2020-10-27 01:29:27,170 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-27 01:29:27,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-27 01:29:27,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 37. [2020-10-27 01:29:27,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-27 01:29:27,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2020-10-27 01:29:27,185 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 32 [2020-10-27 01:29:27,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:29:27,186 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2020-10-27 01:29:27,186 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 01:29:27,186 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2020-10-27 01:29:27,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-27 01:29:27,189 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:29:27,189 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:29:27,189 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 01:29:27,189 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:29:27,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:29:27,190 INFO L82 PathProgramCache]: Analyzing trace with hash 1361468789, now seen corresponding path program 5 times [2020-10-27 01:29:27,190 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:29:27,191 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1114368126] [2020-10-27 01:29:27,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:29:27,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:29:27,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:29:27,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:29:29,810 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:29:29,810 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-27 01:29:29,810 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:29:29,811 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2593 [2020-10-27 01:29:29,811 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:29:29,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 01:29:29,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:29:29,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 01:29:29,812 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:29:29,897 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:29:29,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:29:29,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:29:29,906 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:29:29,906 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:29:29,906 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:29:29,907 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:29:29,907 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:29:29,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:29:29,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:29:29,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:29:29,908 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:29:29,912 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-27 01:29:29,913 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1114368126] [2020-10-27 01:29:29,913 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:29:29,914 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 01:29:29,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964894332] [2020-10-27 01:29:29,914 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 01:29:29,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:29:29,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 01:29:29,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-27 01:29:29,916 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand 9 states. [2020-10-27 01:29:30,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:29:30,056 INFO L93 Difference]: Finished difference Result 63 states and 66 transitions. [2020-10-27 01:29:30,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 01:29:30,057 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 36 [2020-10-27 01:29:30,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:29:30,058 INFO L225 Difference]: With dead ends: 63 [2020-10-27 01:29:30,058 INFO L226 Difference]: Without dead ends: 43 [2020-10-27 01:29:30,059 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-27 01:29:30,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-27 01:29:30,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 41. [2020-10-27 01:29:30,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-27 01:29:30,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2020-10-27 01:29:30,068 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 36 [2020-10-27 01:29:30,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:29:30,068 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2020-10-27 01:29:30,068 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 01:29:30,069 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2020-10-27 01:29:30,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-27 01:29:30,069 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:29:30,070 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:29:30,070 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 01:29:30,070 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:29:30,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:29:30,071 INFO L82 PathProgramCache]: Analyzing trace with hash -1598440455, now seen corresponding path program 6 times [2020-10-27 01:29:30,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:29:30,071 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1355269691] [2020-10-27 01:29:30,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:29:30,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:29:30,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:29:30,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:29:33,489 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:29:33,489 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-27 01:29:33,489 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:29:33,489 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3399 [2020-10-27 01:29:33,490 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:29:33,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 01:29:33,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:29:33,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 01:29:33,490 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:29:33,592 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:29:33,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:29:33,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:29:33,601 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:29:33,601 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:29:33,601 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:29:33,601 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 01:29:33,602 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:29:33,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:29:33,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:29:33,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:29:33,602 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:29:33,609 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-27 01:29:33,609 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1355269691] [2020-10-27 01:29:33,609 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:29:33,609 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 01:29:33,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103297140] [2020-10-27 01:29:33,610 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 01:29:33,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:29:33,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 01:29:33,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-27 01:29:33,613 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand 10 states. [2020-10-27 01:29:33,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:29:33,764 INFO L93 Difference]: Finished difference Result 69 states and 72 transitions. [2020-10-27 01:29:33,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 01:29:33,764 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 40 [2020-10-27 01:29:33,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:29:33,765 INFO L225 Difference]: With dead ends: 69 [2020-10-27 01:29:33,765 INFO L226 Difference]: Without dead ends: 47 [2020-10-27 01:29:33,768 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-27 01:29:33,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-27 01:29:33,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2020-10-27 01:29:33,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-27 01:29:33,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2020-10-27 01:29:33,783 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 40 [2020-10-27 01:29:33,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:29:33,784 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2020-10-27 01:29:33,784 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 01:29:33,785 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2020-10-27 01:29:33,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-27 01:29:33,788 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:29:33,788 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:29:33,791 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 01:29:33,791 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:29:33,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:29:33,792 INFO L82 PathProgramCache]: Analyzing trace with hash -2035070851, now seen corresponding path program 7 times [2020-10-27 01:29:33,792 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:29:33,792 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1582715243] [2020-10-27 01:29:33,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:29:33,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:29:33,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:29:33,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:29:38,838 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:29:38,839 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-27 01:29:38,839 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:29:38,839 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5020 [2020-10-27 01:29:38,839 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:29:38,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 01:29:38,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:29:38,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-27 01:29:38,840 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:29:38,954 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:29:38,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:29:38,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:29:38,964 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:29:38,964 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:29:38,964 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:29:38,964 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 01:29:38,964 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:29:38,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:29:38,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:29:38,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:29:38,967 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 01:29:38,972 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-10-27 01:29:38,973 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1582715243] [2020-10-27 01:29:38,974 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:29:38,974 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:29:38,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927361271] [2020-10-27 01:29:38,976 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:29:38,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:29:38,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:29:38,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:29:38,982 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 11 states. [2020-10-27 01:29:39,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:29:39,133 INFO L93 Difference]: Finished difference Result 75 states and 78 transitions. [2020-10-27 01:29:39,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 01:29:39,134 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 44 [2020-10-27 01:29:39,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:29:39,135 INFO L225 Difference]: With dead ends: 75 [2020-10-27 01:29:39,136 INFO L226 Difference]: Without dead ends: 51 [2020-10-27 01:29:39,137 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:29:39,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-27 01:29:39,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 49. [2020-10-27 01:29:39,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-27 01:29:39,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2020-10-27 01:29:39,155 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 44 [2020-10-27 01:29:39,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:29:39,156 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2020-10-27 01:29:39,156 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:29:39,156 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2020-10-27 01:29:39,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-27 01:29:39,162 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:29:39,163 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:29:39,163 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 01:29:39,163 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:29:39,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:29:39,164 INFO L82 PathProgramCache]: Analyzing trace with hash -330824959, now seen corresponding path program 8 times [2020-10-27 01:29:39,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:29:39,164 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1550603894] [2020-10-27 01:29:39,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:29:39,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:29:39,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:29:39,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:29:44,190 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:29:44,191 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-27 01:29:44,191 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:29:44,191 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-27 01:29:44,191 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:29:44,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 01:29:44,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:29:44,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-27 01:29:44,192 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:29:44,336 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:29:44,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:29:44,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:29:44,345 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:29:44,345 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:29:44,345 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:29:44,346 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:29:44,346 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:29:44,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:29:44,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:29:44,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:29:44,347 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 01:29:44,356 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-10-27 01:29:44,357 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1550603894] [2020-10-27 01:29:44,357 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:29:44,357 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 01:29:44,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542702210] [2020-10-27 01:29:44,359 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 01:29:44,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:29:44,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 01:29:44,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-27 01:29:44,361 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand 12 states. [2020-10-27 01:29:44,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:29:44,511 INFO L93 Difference]: Finished difference Result 81 states and 84 transitions. [2020-10-27 01:29:44,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 01:29:44,512 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 48 [2020-10-27 01:29:44,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:29:44,513 INFO L225 Difference]: With dead ends: 81 [2020-10-27 01:29:44,513 INFO L226 Difference]: Without dead ends: 55 [2020-10-27 01:29:44,514 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-27 01:29:44,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-27 01:29:44,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 53. [2020-10-27 01:29:44,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-27 01:29:44,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2020-10-27 01:29:44,521 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 48 [2020-10-27 01:29:44,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:29:44,521 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2020-10-27 01:29:44,521 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 01:29:44,522 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2020-10-27 01:29:44,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-27 01:29:44,523 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:29:44,523 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:29:44,523 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 01:29:44,523 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:29:44,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:29:44,524 INFO L82 PathProgramCache]: Analyzing trace with hash 153938821, now seen corresponding path program 9 times [2020-10-27 01:29:44,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:29:44,524 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1011261997] [2020-10-27 01:29:44,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:29:44,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:29:44,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:29:44,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:29:49,551 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:29:49,552 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-27 01:29:49,552 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:29:49,552 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-27 01:29:49,552 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:29:49,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 01:29:49,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:29:49,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-27 01:29:49,553 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:29:49,723 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:29:49,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:29:49,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:29:49,731 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:29:49,731 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:29:49,732 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:29:49,732 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:29:49,732 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:29:49,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:29:49,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:29:49,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:29:49,733 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:29:49,739 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-10-27 01:29:49,740 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1011261997] [2020-10-27 01:29:49,740 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:29:49,740 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 01:29:49,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613552597] [2020-10-27 01:29:49,742 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 01:29:49,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:29:49,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 01:29:49,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:29:49,743 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand 13 states. [2020-10-27 01:29:49,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:29:49,902 INFO L93 Difference]: Finished difference Result 87 states and 90 transitions. [2020-10-27 01:29:49,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 01:29:49,902 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 52 [2020-10-27 01:29:49,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:29:49,903 INFO L225 Difference]: With dead ends: 87 [2020-10-27 01:29:49,904 INFO L226 Difference]: Without dead ends: 59 [2020-10-27 01:29:49,905 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:29:49,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-27 01:29:49,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 57. [2020-10-27 01:29:49,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-27 01:29:49,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2020-10-27 01:29:49,922 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 52 [2020-10-27 01:29:49,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:29:49,922 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2020-10-27 01:29:49,923 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 01:29:49,923 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2020-10-27 01:29:49,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-27 01:29:49,923 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:29:49,924 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:29:49,924 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 01:29:49,924 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:29:49,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:29:49,925 INFO L82 PathProgramCache]: Analyzing trace with hash -476642807, now seen corresponding path program 10 times [2020-10-27 01:29:49,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:29:49,931 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1605683938] [2020-10-27 01:29:49,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:29:49,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:29:49,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:29:50,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:29:54,970 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:29:54,970 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-27 01:29:54,970 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:29:54,970 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-27 01:29:54,970 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:29:54,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 01:29:54,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:29:54,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-27 01:29:54,971 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:29:55,149 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:29:55,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:29:55,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:29:55,154 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:29:55,154 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:29:55,154 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:29:55,154 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:29:55,155 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:29:55,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:29:55,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:29:55,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:29:55,155 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:29:55,161 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-10-27 01:29:55,162 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1605683938] [2020-10-27 01:29:55,162 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:29:55,162 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 01:29:55,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039882957] [2020-10-27 01:29:55,163 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 01:29:55,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:29:55,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 01:29:55,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-27 01:29:55,164 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 14 states. [2020-10-27 01:29:55,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:29:55,374 INFO L93 Difference]: Finished difference Result 93 states and 96 transitions. [2020-10-27 01:29:55,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 01:29:55,375 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 56 [2020-10-27 01:29:55,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:29:55,377 INFO L225 Difference]: With dead ends: 93 [2020-10-27 01:29:55,377 INFO L226 Difference]: Without dead ends: 63 [2020-10-27 01:29:55,378 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-27 01:29:55,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-27 01:29:55,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 61. [2020-10-27 01:29:55,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-27 01:29:55,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 62 transitions. [2020-10-27 01:29:55,391 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 62 transitions. Word has length 56 [2020-10-27 01:29:55,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:29:55,392 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 62 transitions. [2020-10-27 01:29:55,392 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 01:29:55,396 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 62 transitions. [2020-10-27 01:29:55,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-27 01:29:55,397 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:29:55,397 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:29:55,397 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 01:29:55,397 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:29:55,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:29:55,398 INFO L82 PathProgramCache]: Analyzing trace with hash -801421683, now seen corresponding path program 11 times [2020-10-27 01:29:55,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:29:55,398 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1735435847] [2020-10-27 01:29:55,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:29:55,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:29:55,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:29:55,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:30:00,733 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:30:00,734 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-27 01:30:00,734 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:30:00,734 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5313 [2020-10-27 01:30:00,734 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:30:00,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 01:30:00,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:30:00,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-27 01:30:00,735 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:30:00,935 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:30:00,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:30:00,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:30:00,941 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:30:00,941 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:30:00,941 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:30:00,942 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:30:00,942 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:30:00,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:30:00,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:30:00,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:30:00,943 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:30:00,952 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2020-10-27 01:30:00,952 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1735435847] [2020-10-27 01:30:00,952 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:30:00,953 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 01:30:00,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320760846] [2020-10-27 01:30:00,953 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 01:30:00,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:30:00,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 01:30:00,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-27 01:30:00,955 INFO L87 Difference]: Start difference. First operand 61 states and 62 transitions. Second operand 15 states. [2020-10-27 01:30:01,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:30:01,103 INFO L93 Difference]: Finished difference Result 99 states and 102 transitions. [2020-10-27 01:30:01,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 01:30:01,104 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 60 [2020-10-27 01:30:01,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:30:01,105 INFO L225 Difference]: With dead ends: 99 [2020-10-27 01:30:01,105 INFO L226 Difference]: Without dead ends: 67 [2020-10-27 01:30:01,106 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-27 01:30:01,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-27 01:30:01,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 65. [2020-10-27 01:30:01,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-27 01:30:01,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 66 transitions. [2020-10-27 01:30:01,123 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 66 transitions. Word has length 60 [2020-10-27 01:30:01,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:30:01,124 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 66 transitions. [2020-10-27 01:30:01,124 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 01:30:01,124 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 66 transitions. [2020-10-27 01:30:01,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-27 01:30:01,126 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:30:01,126 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:30:01,126 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 01:30:01,126 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:30:01,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:30:01,127 INFO L82 PathProgramCache]: Analyzing trace with hash -229721839, now seen corresponding path program 12 times [2020-10-27 01:30:01,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:30:01,129 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [220310566] [2020-10-27 01:30:01,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:30:01,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:30:01,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:30:01,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:30:06,183 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:30:06,183 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-27 01:30:06,183 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:30:06,184 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5027 [2020-10-27 01:30:06,184 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:30:06,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 01:30:06,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:30:06,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-27 01:30:06,184 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:30:06,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:30:06,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:30:06,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:30:06,419 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:30:06,419 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:30:06,420 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:30:06,420 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:30:06,420 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:30:06,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:30:06,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:30:06,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:30:06,421 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:30:06,430 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2020-10-27 01:30:06,430 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [220310566] [2020-10-27 01:30:06,430 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:30:06,431 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 01:30:06,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165799907] [2020-10-27 01:30:06,431 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 01:30:06,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:30:06,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 01:30:06,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-27 01:30:06,432 INFO L87 Difference]: Start difference. First operand 65 states and 66 transitions. Second operand 16 states. [2020-10-27 01:30:06,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:30:06,658 INFO L93 Difference]: Finished difference Result 105 states and 108 transitions. [2020-10-27 01:30:06,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 01:30:06,659 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 64 [2020-10-27 01:30:06,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:30:06,660 INFO L225 Difference]: With dead ends: 105 [2020-10-27 01:30:06,660 INFO L226 Difference]: Without dead ends: 71 [2020-10-27 01:30:06,661 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-27 01:30:06,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-27 01:30:06,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 69. [2020-10-27 01:30:06,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-27 01:30:06,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2020-10-27 01:30:06,667 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 64 [2020-10-27 01:30:06,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:30:06,667 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2020-10-27 01:30:06,667 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 01:30:06,667 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2020-10-27 01:30:06,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-27 01:30:06,668 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:30:06,668 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:30:06,668 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 01:30:06,668 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:30:06,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:30:06,669 INFO L82 PathProgramCache]: Analyzing trace with hash -1148823147, now seen corresponding path program 13 times [2020-10-27 01:30:06,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:30:06,669 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [560804989] [2020-10-27 01:30:06,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:30:06,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:30:06,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:30:06,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:30:11,731 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:30:11,732 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-27 01:30:11,732 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:30:11,732 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5039 [2020-10-27 01:30:11,732 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:30:11,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 01:30:11,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:30:11,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-27 01:30:11,733 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:30:11,966 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:30:11,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:30:11,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:30:11,971 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:30:11,971 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:30:11,972 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:30:11,972 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:30:11,972 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:30:11,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:30:11,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:30:11,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:30:11,973 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:30:11,983 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2020-10-27 01:30:11,983 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [560804989] [2020-10-27 01:30:11,984 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:30:11,984 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-27 01:30:11,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737848434] [2020-10-27 01:30:11,985 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-27 01:30:11,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:30:11,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-27 01:30:11,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-27 01:30:11,986 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand 17 states. [2020-10-27 01:30:12,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:30:12,183 INFO L93 Difference]: Finished difference Result 111 states and 114 transitions. [2020-10-27 01:30:12,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 01:30:12,184 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 68 [2020-10-27 01:30:12,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:30:12,185 INFO L225 Difference]: With dead ends: 111 [2020-10-27 01:30:12,185 INFO L226 Difference]: Without dead ends: 75 [2020-10-27 01:30:12,186 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-27 01:30:12,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-27 01:30:12,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 73. [2020-10-27 01:30:12,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-27 01:30:12,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 74 transitions. [2020-10-27 01:30:12,199 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 74 transitions. Word has length 68 [2020-10-27 01:30:12,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:30:12,200 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 74 transitions. [2020-10-27 01:30:12,200 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-27 01:30:12,200 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 74 transitions. [2020-10-27 01:30:12,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-27 01:30:12,203 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:30:12,203 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:30:12,204 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 01:30:12,204 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:30:12,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:30:12,204 INFO L82 PathProgramCache]: Analyzing trace with hash 1813456921, now seen corresponding path program 14 times [2020-10-27 01:30:12,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:30:12,205 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1120606688] [2020-10-27 01:30:12,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:30:12,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:30:12,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:30:12,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:30:17,242 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:30:17,242 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-27 01:30:17,243 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:30:17,243 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-27 01:30:17,243 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:30:17,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-27 01:30:17,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:30:17,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-27 01:30:17,243 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:30:17,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:30:17,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:30:17,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:30:17,506 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:30:17,507 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:30:17,507 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:30:17,507 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:30:17,507 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:30:17,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:30:17,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:30:17,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:30:17,508 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:30:17,523 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2020-10-27 01:30:17,524 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1120606688] [2020-10-27 01:30:17,527 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:30:17,528 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-27 01:30:17,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764979657] [2020-10-27 01:30:17,529 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-27 01:30:17,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:30:17,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-27 01:30:17,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-27 01:30:17,530 INFO L87 Difference]: Start difference. First operand 73 states and 74 transitions. Second operand 18 states. [2020-10-27 01:30:17,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:30:17,840 INFO L93 Difference]: Finished difference Result 117 states and 120 transitions. [2020-10-27 01:30:17,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 01:30:17,842 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 72 [2020-10-27 01:30:17,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:30:17,843 INFO L225 Difference]: With dead ends: 117 [2020-10-27 01:30:17,843 INFO L226 Difference]: Without dead ends: 79 [2020-10-27 01:30:17,844 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-27 01:30:17,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-27 01:30:17,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 77. [2020-10-27 01:30:17,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-27 01:30:17,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 78 transitions. [2020-10-27 01:30:17,858 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 78 transitions. Word has length 72 [2020-10-27 01:30:17,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:30:17,858 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 78 transitions. [2020-10-27 01:30:17,858 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-27 01:30:17,859 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 78 transitions. [2020-10-27 01:30:17,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-27 01:30:17,861 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:30:17,861 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:30:17,861 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-27 01:30:17,861 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:30:17,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:30:17,865 INFO L82 PathProgramCache]: Analyzing trace with hash -1833556835, now seen corresponding path program 15 times [2020-10-27 01:30:17,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:30:17,865 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [574360604] [2020-10-27 01:30:17,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:30:17,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:30:17,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:30:17,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:30:22,919 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:30:22,919 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-27 01:30:22,919 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:30:22,920 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-27 01:30:22,920 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:30:22,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-27 01:30:22,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:30:22,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-27 01:30:22,920 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:30:23,194 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:30:23,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:30:23,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:30:23,200 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:30:23,200 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:30:23,200 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:30:23,201 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:30:23,201 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:30:23,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:30:23,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:30:23,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:30:23,201 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:30:23,213 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2020-10-27 01:30:23,213 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [574360604] [2020-10-27 01:30:23,213 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:30:23,214 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-27 01:30:23,214 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89276015] [2020-10-27 01:30:23,215 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-27 01:30:23,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:30:23,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-27 01:30:23,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-27 01:30:23,220 INFO L87 Difference]: Start difference. First operand 77 states and 78 transitions. Second operand 19 states. [2020-10-27 01:30:23,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:30:23,455 INFO L93 Difference]: Finished difference Result 123 states and 126 transitions. [2020-10-27 01:30:23,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 01:30:23,456 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 76 [2020-10-27 01:30:23,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:30:23,456 INFO L225 Difference]: With dead ends: 123 [2020-10-27 01:30:23,457 INFO L226 Difference]: Without dead ends: 83 [2020-10-27 01:30:23,457 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-27 01:30:23,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-27 01:30:23,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 81. [2020-10-27 01:30:23,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-27 01:30:23,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 82 transitions. [2020-10-27 01:30:23,470 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 82 transitions. Word has length 76 [2020-10-27 01:30:23,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:30:23,471 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 82 transitions. [2020-10-27 01:30:23,471 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-27 01:30:23,471 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 82 transitions. [2020-10-27 01:30:23,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-27 01:30:23,472 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:30:23,472 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:30:23,473 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-27 01:30:23,473 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:30:23,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:30:23,474 INFO L82 PathProgramCache]: Analyzing trace with hash -1936175327, now seen corresponding path program 16 times [2020-10-27 01:30:23,474 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:30:23,475 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1820823855] [2020-10-27 01:30:23,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:30:23,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:30:23,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:30:23,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:30:28,563 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:30:28,563 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-27 01:30:28,563 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:30:28,563 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5057 [2020-10-27 01:30:28,564 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:30:28,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-27 01:30:28,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:30:28,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-27 01:30:28,564 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:30:28,866 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:30:28,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:30:28,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:30:28,872 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:30:28,872 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:30:28,872 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:30:28,872 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:30:28,873 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:30:28,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:30:28,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:30:28,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:30:28,873 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:30:28,884 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2020-10-27 01:30:28,885 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1820823855] [2020-10-27 01:30:28,885 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:30:28,885 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-27 01:30:28,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905439575] [2020-10-27 01:30:28,888 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-27 01:30:28,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:30:28,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-27 01:30:28,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-27 01:30:28,892 INFO L87 Difference]: Start difference. First operand 81 states and 82 transitions. Second operand 20 states. [2020-10-27 01:30:29,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:30:29,156 INFO L93 Difference]: Finished difference Result 129 states and 132 transitions. [2020-10-27 01:30:29,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 01:30:29,156 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 80 [2020-10-27 01:30:29,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:30:29,158 INFO L225 Difference]: With dead ends: 129 [2020-10-27 01:30:29,159 INFO L226 Difference]: Without dead ends: 87 [2020-10-27 01:30:29,160 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-27 01:30:29,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-27 01:30:29,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 85. [2020-10-27 01:30:29,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-27 01:30:29,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 86 transitions. [2020-10-27 01:30:29,167 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 86 transitions. Word has length 80 [2020-10-27 01:30:29,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:30:29,167 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 86 transitions. [2020-10-27 01:30:29,167 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-27 01:30:29,167 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 86 transitions. [2020-10-27 01:30:29,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-27 01:30:29,168 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:30:29,168 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:30:29,168 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-27 01:30:29,169 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:30:29,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:30:29,169 INFO L82 PathProgramCache]: Analyzing trace with hash 91400101, now seen corresponding path program 17 times [2020-10-27 01:30:29,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:30:29,171 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [617481936] [2020-10-27 01:30:29,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:30:29,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:30:29,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:30:29,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:30:34,275 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:30:34,276 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-27 01:30:34,276 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:30:34,276 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5067 [2020-10-27 01:30:34,276 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:30:34,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-27 01:30:34,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:30:34,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-27 01:30:34,277 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:30:34,614 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:30:34,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:30:34,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:30:34,620 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:30:34,620 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:30:34,620 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:30:34,620 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:30:34,620 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:30:34,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:30:34,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:30:34,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:30:34,621 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:30:34,632 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2020-10-27 01:30:34,632 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [617481936] [2020-10-27 01:30:34,632 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:30:34,632 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-27 01:30:34,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391879186] [2020-10-27 01:30:34,633 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-27 01:30:34,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:30:34,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-27 01:30:34,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-27 01:30:34,634 INFO L87 Difference]: Start difference. First operand 85 states and 86 transitions. Second operand 21 states. [2020-10-27 01:30:34,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:30:34,907 INFO L93 Difference]: Finished difference Result 135 states and 138 transitions. [2020-10-27 01:30:34,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-27 01:30:34,907 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 84 [2020-10-27 01:30:34,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:30:34,908 INFO L225 Difference]: With dead ends: 135 [2020-10-27 01:30:34,908 INFO L226 Difference]: Without dead ends: 91 [2020-10-27 01:30:34,909 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-27 01:30:34,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-27 01:30:34,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 89. [2020-10-27 01:30:34,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-27 01:30:34,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 90 transitions. [2020-10-27 01:30:34,914 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 90 transitions. Word has length 84 [2020-10-27 01:30:34,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:30:34,914 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 90 transitions. [2020-10-27 01:30:34,914 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-27 01:30:34,915 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 90 transitions. [2020-10-27 01:30:34,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-10-27 01:30:34,915 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:30:34,916 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:30:34,916 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-27 01:30:34,916 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:30:34,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:30:34,916 INFO L82 PathProgramCache]: Analyzing trace with hash 2004495913, now seen corresponding path program 18 times [2020-10-27 01:30:34,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:30:34,917 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1110254280] [2020-10-27 01:30:34,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:30:34,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:30:34,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:30:35,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:30:39,994 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:30:39,994 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 98 [2020-10-27 01:30:39,994 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:30:39,994 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5050 [2020-10-27 01:30:39,994 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:30:39,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-27 01:30:39,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:30:39,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-27 01:30:39,995 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:30:40,330 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:30:40,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:30:40,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:30:40,335 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:30:40,335 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:30:40,335 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:30:40,336 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:30:40,336 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:30:40,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:30:40,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:30:40,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:30:40,336 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:30:40,348 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2020-10-27 01:30:40,349 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1110254280] [2020-10-27 01:30:40,349 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:30:40,349 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-27 01:30:40,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412646416] [2020-10-27 01:30:40,350 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-27 01:30:40,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:30:40,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-27 01:30:40,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-27 01:30:40,351 INFO L87 Difference]: Start difference. First operand 89 states and 90 transitions. Second operand 22 states. [2020-10-27 01:30:40,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:30:40,637 INFO L93 Difference]: Finished difference Result 141 states and 144 transitions. [2020-10-27 01:30:40,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-27 01:30:40,637 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 88 [2020-10-27 01:30:40,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:30:40,638 INFO L225 Difference]: With dead ends: 141 [2020-10-27 01:30:40,638 INFO L226 Difference]: Without dead ends: 95 [2020-10-27 01:30:40,639 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-27 01:30:40,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-27 01:30:40,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 93. [2020-10-27 01:30:40,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-27 01:30:40,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 94 transitions. [2020-10-27 01:30:40,644 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 94 transitions. Word has length 88 [2020-10-27 01:30:40,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:30:40,646 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 94 transitions. [2020-10-27 01:30:40,646 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-27 01:30:40,646 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 94 transitions. [2020-10-27 01:30:40,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-10-27 01:30:40,647 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:30:40,647 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:30:40,647 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-27 01:30:40,647 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:30:40,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:30:40,648 INFO L82 PathProgramCache]: Analyzing trace with hash -1419517267, now seen corresponding path program 19 times [2020-10-27 01:30:40,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:30:40,648 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1080182041] [2020-10-27 01:30:40,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:30:40,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:30:40,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:30:40,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:30:45,718 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:30:45,719 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-27 01:30:45,719 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:30:45,719 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5033 [2020-10-27 01:30:45,719 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:30:45,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-27 01:30:45,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:30:45,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-27 01:30:45,720 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:30:46,122 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:30:46,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:30:46,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:30:46,129 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:30:46,130 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:30:46,130 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:30:46,130 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 01:30:46,130 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:30:46,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:30:46,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:30:46,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:30:46,131 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:30:46,149 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 361 trivial. 0 not checked. [2020-10-27 01:30:46,150 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1080182041] [2020-10-27 01:30:46,150 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:30:46,151 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-27 01:30:46,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248126318] [2020-10-27 01:30:46,153 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-27 01:30:46,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:30:46,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-27 01:30:46,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-27 01:30:46,155 INFO L87 Difference]: Start difference. First operand 93 states and 94 transitions. Second operand 23 states. [2020-10-27 01:30:46,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:30:46,441 INFO L93 Difference]: Finished difference Result 147 states and 150 transitions. [2020-10-27 01:30:46,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-27 01:30:46,442 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 92 [2020-10-27 01:30:46,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:30:46,443 INFO L225 Difference]: With dead ends: 147 [2020-10-27 01:30:46,444 INFO L226 Difference]: Without dead ends: 99 [2020-10-27 01:30:46,445 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-27 01:30:46,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-27 01:30:46,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 97. [2020-10-27 01:30:46,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-27 01:30:46,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 98 transitions. [2020-10-27 01:30:46,455 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 98 transitions. Word has length 92 [2020-10-27 01:30:46,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:30:46,459 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 98 transitions. [2020-10-27 01:30:46,459 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-27 01:30:46,459 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 98 transitions. [2020-10-27 01:30:46,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-10-27 01:30:46,461 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:30:46,461 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:30:46,462 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-27 01:30:46,462 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:30:46,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:30:46,462 INFO L82 PathProgramCache]: Analyzing trace with hash 946128177, now seen corresponding path program 20 times [2020-10-27 01:30:46,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:30:46,463 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [64320429] [2020-10-27 01:30:46,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:30:46,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:30:46,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:30:46,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:30:51,557 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:30:51,557 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-10-27 01:30:51,557 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:30:51,557 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5062 [2020-10-27 01:30:51,557 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:30:51,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-27 01:30:51,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:30:51,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-27 01:30:51,558 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:30:51,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:30:51,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:30:51,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:30:51,977 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:30:51,977 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:30:51,977 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:30:51,978 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:30:51,978 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:30:51,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:30:51,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:30:51,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:30:51,978 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:30:51,990 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2020-10-27 01:30:51,991 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [64320429] [2020-10-27 01:30:51,991 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:30:51,991 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-27 01:30:51,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271570095] [2020-10-27 01:30:51,992 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-27 01:30:51,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:30:51,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-27 01:30:51,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-27 01:30:51,995 INFO L87 Difference]: Start difference. First operand 97 states and 98 transitions. Second operand 24 states. [2020-10-27 01:30:52,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:30:52,250 INFO L93 Difference]: Finished difference Result 153 states and 156 transitions. [2020-10-27 01:30:52,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-27 01:30:52,254 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 96 [2020-10-27 01:30:52,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:30:52,255 INFO L225 Difference]: With dead ends: 153 [2020-10-27 01:30:52,255 INFO L226 Difference]: Without dead ends: 103 [2020-10-27 01:30:52,256 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-27 01:30:52,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-27 01:30:52,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 101. [2020-10-27 01:30:52,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-27 01:30:52,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 102 transitions. [2020-10-27 01:30:52,267 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 102 transitions. Word has length 96 [2020-10-27 01:30:52,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:30:52,267 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 102 transitions. [2020-10-27 01:30:52,267 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-27 01:30:52,267 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 102 transitions. [2020-10-27 01:30:52,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-10-27 01:30:52,268 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:30:52,268 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:30:52,268 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-27 01:30:52,269 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:30:52,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:30:52,269 INFO L82 PathProgramCache]: Analyzing trace with hash 70374837, now seen corresponding path program 21 times [2020-10-27 01:30:52,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:30:52,269 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [63526188] [2020-10-27 01:30:52,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:30:52,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:30:52,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:30:52,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:30:57,391 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:30:57,391 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 110 [2020-10-27 01:30:57,391 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:30:57,391 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5089 [2020-10-27 01:30:57,391 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:30:57,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-27 01:30:57,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:30:57,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-27 01:30:57,392 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:30:57,854 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:30:57,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:30:57,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:30:57,860 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:30:57,860 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:30:57,860 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:30:57,860 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:30:57,861 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:30:57,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:30:57,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:30:57,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:30:57,861 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:30:57,873 INFO L134 CoverageAnalysis]: Checked inductivity of 882 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2020-10-27 01:30:57,873 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [63526188] [2020-10-27 01:30:57,874 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:30:57,874 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-27 01:30:57,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686894810] [2020-10-27 01:30:57,874 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-27 01:30:57,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:30:57,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-27 01:30:57,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-27 01:30:57,876 INFO L87 Difference]: Start difference. First operand 101 states and 102 transitions. Second operand 25 states. [2020-10-27 01:30:58,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:30:58,207 INFO L93 Difference]: Finished difference Result 159 states and 162 transitions. [2020-10-27 01:30:58,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-27 01:30:58,208 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 100 [2020-10-27 01:30:58,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:30:58,209 INFO L225 Difference]: With dead ends: 159 [2020-10-27 01:30:58,209 INFO L226 Difference]: Without dead ends: 107 [2020-10-27 01:30:58,211 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-27 01:30:58,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-27 01:30:58,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 105. [2020-10-27 01:30:58,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-27 01:30:58,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 106 transitions. [2020-10-27 01:30:58,216 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 106 transitions. Word has length 100 [2020-10-27 01:30:58,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:30:58,217 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 106 transitions. [2020-10-27 01:30:58,217 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-27 01:30:58,217 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 106 transitions. [2020-10-27 01:30:58,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-10-27 01:30:58,218 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:30:58,218 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:30:58,218 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-27 01:30:58,218 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:30:58,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:30:58,219 INFO L82 PathProgramCache]: Analyzing trace with hash -1023404999, now seen corresponding path program 22 times [2020-10-27 01:30:58,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:30:58,219 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1970997606] [2020-10-27 01:30:58,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:30:58,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:30:58,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:30:58,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:03,250 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:31:03,251 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 114 [2020-10-27 01:31:03,251 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:31:03,251 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-27 01:31:03,251 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:31:03,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-27 01:31:03,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:31:03,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-27 01:31:03,252 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:31:03,744 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:31:03,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:31:03,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:03,748 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:31:03,748 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:31:03,748 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:31:03,748 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:31:03,748 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:31:03,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:31:03,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:31:03,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:31:03,749 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:31:03,761 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2020-10-27 01:31:03,761 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1970997606] [2020-10-27 01:31:03,762 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:31:03,762 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-27 01:31:03,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449444522] [2020-10-27 01:31:03,762 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-27 01:31:03,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:31:03,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-27 01:31:03,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-27 01:31:03,764 INFO L87 Difference]: Start difference. First operand 105 states and 106 transitions. Second operand 26 states. [2020-10-27 01:31:04,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:31:04,092 INFO L93 Difference]: Finished difference Result 165 states and 168 transitions. [2020-10-27 01:31:04,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-27 01:31:04,093 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 104 [2020-10-27 01:31:04,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:31:04,094 INFO L225 Difference]: With dead ends: 165 [2020-10-27 01:31:04,094 INFO L226 Difference]: Without dead ends: 111 [2020-10-27 01:31:04,095 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-27 01:31:04,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-27 01:31:04,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 109. [2020-10-27 01:31:04,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-10-27 01:31:04,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 110 transitions. [2020-10-27 01:31:04,101 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 110 transitions. Word has length 104 [2020-10-27 01:31:04,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:31:04,101 INFO L481 AbstractCegarLoop]: Abstraction has 109 states and 110 transitions. [2020-10-27 01:31:04,101 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-27 01:31:04,101 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 110 transitions. [2020-10-27 01:31:04,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-10-27 01:31:04,102 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:31:04,103 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:31:04,103 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-27 01:31:04,103 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:31:04,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:31:04,104 INFO L82 PathProgramCache]: Analyzing trace with hash 2005172413, now seen corresponding path program 23 times [2020-10-27 01:31:04,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:31:04,104 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1829092223] [2020-10-27 01:31:04,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:31:04,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:31:04,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:04,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:09,232 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:31:09,232 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 118 [2020-10-27 01:31:09,232 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:31:09,232 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5093 [2020-10-27 01:31:09,232 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:31:09,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-27 01:31:09,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:31:09,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-27 01:31:09,234 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 01:31:09,774 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:31:09,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:31:09,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:09,779 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:31:09,779 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:31:09,779 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:31:09,779 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:31:09,779 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:31:09,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:31:09,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:31:09,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:31:09,780 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:31:09,806 INFO L134 CoverageAnalysis]: Checked inductivity of 1058 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 529 trivial. 0 not checked. [2020-10-27 01:31:09,807 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1829092223] [2020-10-27 01:31:09,807 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:31:09,807 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-27 01:31:09,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731787712] [2020-10-27 01:31:09,807 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-27 01:31:09,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:31:09,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-27 01:31:09,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-27 01:31:09,809 INFO L87 Difference]: Start difference. First operand 109 states and 110 transitions. Second operand 27 states. [2020-10-27 01:31:10,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:31:10,119 INFO L93 Difference]: Finished difference Result 171 states and 174 transitions. [2020-10-27 01:31:10,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-27 01:31:10,120 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 108 [2020-10-27 01:31:10,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:31:10,121 INFO L225 Difference]: With dead ends: 171 [2020-10-27 01:31:10,121 INFO L226 Difference]: Without dead ends: 115 [2020-10-27 01:31:10,122 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-27 01:31:10,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-27 01:31:10,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 113. [2020-10-27 01:31:10,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-10-27 01:31:10,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 114 transitions. [2020-10-27 01:31:10,130 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 114 transitions. Word has length 108 [2020-10-27 01:31:10,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:31:10,130 INFO L481 AbstractCegarLoop]: Abstraction has 113 states and 114 transitions. [2020-10-27 01:31:10,130 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-27 01:31:10,130 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 114 transitions. [2020-10-27 01:31:10,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-10-27 01:31:10,131 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:31:10,132 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:31:10,132 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-27 01:31:10,132 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:31:10,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:31:10,132 INFO L82 PathProgramCache]: Analyzing trace with hash -218883263, now seen corresponding path program 24 times [2020-10-27 01:31:10,132 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:31:10,133 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1761890087] [2020-10-27 01:31:10,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:31:10,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:31:10,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:13,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:15,261 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:31:15,261 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 122 [2020-10-27 01:31:15,261 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:31:15,261 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5094 [2020-10-27 01:31:15,261 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:31:15,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-27 01:31:15,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:31:15,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-27 01:31:15,262 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:31:15,832 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:31:15,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:31:15,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:15,836 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:31:15,837 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:31:15,837 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:31:15,837 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:31:15,837 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:31:15,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:31:15,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:31:15,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:31:15,838 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:31:15,853 INFO L134 CoverageAnalysis]: Checked inductivity of 1152 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 576 trivial. 0 not checked. [2020-10-27 01:31:15,854 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1761890087] [2020-10-27 01:31:15,854 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:31:15,854 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-27 01:31:15,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107417301] [2020-10-27 01:31:15,855 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-27 01:31:15,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:31:15,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-27 01:31:15,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-27 01:31:15,856 INFO L87 Difference]: Start difference. First operand 113 states and 114 transitions. Second operand 28 states. [2020-10-27 01:31:16,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:31:16,212 INFO L93 Difference]: Finished difference Result 177 states and 180 transitions. [2020-10-27 01:31:16,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-27 01:31:16,214 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 112 [2020-10-27 01:31:16,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:31:16,215 INFO L225 Difference]: With dead ends: 177 [2020-10-27 01:31:16,215 INFO L226 Difference]: Without dead ends: 119 [2020-10-27 01:31:16,216 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-27 01:31:16,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-10-27 01:31:16,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 117. [2020-10-27 01:31:16,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-10-27 01:31:16,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 118 transitions. [2020-10-27 01:31:16,228 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 118 transitions. Word has length 112 [2020-10-27 01:31:16,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:31:16,228 INFO L481 AbstractCegarLoop]: Abstraction has 117 states and 118 transitions. [2020-10-27 01:31:16,228 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-27 01:31:16,228 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 118 transitions. [2020-10-27 01:31:16,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-10-27 01:31:16,229 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:31:16,229 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:31:16,230 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-27 01:31:16,230 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:31:16,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:31:16,233 INFO L82 PathProgramCache]: Analyzing trace with hash 1426318277, now seen corresponding path program 25 times [2020-10-27 01:31:16,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:31:16,235 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [868720443] [2020-10-27 01:31:16,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:31:16,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:31:16,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:16,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:21,346 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:31:21,347 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 126 [2020-10-27 01:31:21,347 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:31:21,347 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5070 [2020-10-27 01:31:21,347 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:31:21,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-27 01:31:21,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:31:21,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-27 01:31:21,347 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:31:21,968 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:31:21,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:31:21,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:21,975 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:31:21,975 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:31:21,976 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:31:21,976 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:31:21,976 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:31:21,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:31:21,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:31:21,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:31:21,977 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:31:21,998 INFO L134 CoverageAnalysis]: Checked inductivity of 1250 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 625 trivial. 0 not checked. [2020-10-27 01:31:21,998 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [868720443] [2020-10-27 01:31:21,999 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:31:21,999 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-27 01:31:21,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430107610] [2020-10-27 01:31:22,000 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-27 01:31:22,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:31:22,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-27 01:31:22,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-27 01:31:22,001 INFO L87 Difference]: Start difference. First operand 117 states and 118 transitions. Second operand 29 states. [2020-10-27 01:31:22,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:31:22,420 INFO L93 Difference]: Finished difference Result 183 states and 186 transitions. [2020-10-27 01:31:22,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-27 01:31:22,421 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 116 [2020-10-27 01:31:22,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:31:22,422 INFO L225 Difference]: With dead ends: 183 [2020-10-27 01:31:22,422 INFO L226 Difference]: Without dead ends: 123 [2020-10-27 01:31:22,424 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-27 01:31:22,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-27 01:31:22,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 121. [2020-10-27 01:31:22,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-27 01:31:22,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 122 transitions. [2020-10-27 01:31:22,430 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 122 transitions. Word has length 116 [2020-10-27 01:31:22,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:31:22,431 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 122 transitions. [2020-10-27 01:31:22,431 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-27 01:31:22,431 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 122 transitions. [2020-10-27 01:31:22,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2020-10-27 01:31:22,432 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:31:22,432 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:31:22,432 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-27 01:31:22,432 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:31:22,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:31:22,433 INFO L82 PathProgramCache]: Analyzing trace with hash -1947674039, now seen corresponding path program 26 times [2020-10-27 01:31:22,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:31:22,433 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [197783482] [2020-10-27 01:31:22,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:31:22,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:31:22,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:22,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:27,590 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:31:27,590 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 130 [2020-10-27 01:31:27,590 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:31:27,591 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5119 [2020-10-27 01:31:27,591 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:31:27,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-27 01:31:27,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:31:27,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-27 01:31:27,591 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:31:28,239 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:31:28,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:31:28,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:28,246 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:31:28,246 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:31:28,247 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:31:28,247 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:31:28,247 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:31:28,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:31:28,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:31:28,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:31:28,248 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:31:28,268 INFO L134 CoverageAnalysis]: Checked inductivity of 1352 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 676 trivial. 0 not checked. [2020-10-27 01:31:28,269 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [197783482] [2020-10-27 01:31:28,270 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:31:28,270 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-27 01:31:28,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576889976] [2020-10-27 01:31:28,270 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-27 01:31:28,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:31:28,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-27 01:31:28,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-27 01:31:28,273 INFO L87 Difference]: Start difference. First operand 121 states and 122 transitions. Second operand 30 states. [2020-10-27 01:31:28,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:31:28,681 INFO L93 Difference]: Finished difference Result 189 states and 192 transitions. [2020-10-27 01:31:28,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-27 01:31:28,681 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 120 [2020-10-27 01:31:28,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:31:28,683 INFO L225 Difference]: With dead ends: 189 [2020-10-27 01:31:28,683 INFO L226 Difference]: Without dead ends: 127 [2020-10-27 01:31:28,683 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-27 01:31:28,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-10-27 01:31:28,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 125. [2020-10-27 01:31:28,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-10-27 01:31:28,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 126 transitions. [2020-10-27 01:31:28,690 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 126 transitions. Word has length 120 [2020-10-27 01:31:28,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:31:28,691 INFO L481 AbstractCegarLoop]: Abstraction has 125 states and 126 transitions. [2020-10-27 01:31:28,691 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-27 01:31:28,691 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 126 transitions. [2020-10-27 01:31:28,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-10-27 01:31:28,692 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:31:28,692 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:31:28,692 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-27 01:31:28,692 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:31:28,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:31:28,693 INFO L82 PathProgramCache]: Analyzing trace with hash -732430643, now seen corresponding path program 27 times [2020-10-27 01:31:28,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:31:28,693 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1367336870] [2020-10-27 01:31:28,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:31:28,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:31:28,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:33,870 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:31:33,870 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 134 [2020-10-27 01:31:33,870 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:31:33,870 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5140 [2020-10-27 01:31:33,870 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:31:33,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-27 01:31:33,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:31:33,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-27 01:31:33,871 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:31:34,547 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:31:34,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:31:34,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:34,551 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:31:34,552 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:31:34,552 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:31:34,552 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:31:34,552 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:31:34,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:31:34,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:31:34,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:31:34,552 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:31:34,563 INFO L134 CoverageAnalysis]: Checked inductivity of 1458 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 729 trivial. 0 not checked. [2020-10-27 01:31:34,564 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1367336870] [2020-10-27 01:31:34,564 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:31:34,564 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-27 01:31:34,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632875270] [2020-10-27 01:31:34,564 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-27 01:31:34,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:31:34,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-27 01:31:34,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-27 01:31:34,565 INFO L87 Difference]: Start difference. First operand 125 states and 126 transitions. Second operand 31 states. [2020-10-27 01:31:34,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:31:34,940 INFO L93 Difference]: Finished difference Result 195 states and 198 transitions. [2020-10-27 01:31:34,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-27 01:31:34,940 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 124 [2020-10-27 01:31:34,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:31:34,942 INFO L225 Difference]: With dead ends: 195 [2020-10-27 01:31:34,942 INFO L226 Difference]: Without dead ends: 131 [2020-10-27 01:31:34,943 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-27 01:31:34,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-10-27 01:31:34,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 129. [2020-10-27 01:31:34,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-10-27 01:31:34,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 130 transitions. [2020-10-27 01:31:34,958 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 130 transitions. Word has length 124 [2020-10-27 01:31:34,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:31:34,958 INFO L481 AbstractCegarLoop]: Abstraction has 129 states and 130 transitions. [2020-10-27 01:31:34,958 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-27 01:31:34,958 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 130 transitions. [2020-10-27 01:31:34,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-10-27 01:31:34,959 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:31:34,959 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:31:34,959 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-27 01:31:34,960 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:31:34,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:31:34,960 INFO L82 PathProgramCache]: Analyzing trace with hash 965103953, now seen corresponding path program 28 times [2020-10-27 01:31:34,960 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:31:34,960 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [932720933] [2020-10-27 01:31:34,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:31:34,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:31:35,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:40,007 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:31:40,008 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 138 [2020-10-27 01:31:40,008 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:31:40,008 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-27 01:31:40,008 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:31:40,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-27 01:31:40,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:31:40,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-27 01:31:40,009 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:31:40,725 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:31:40,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:31:40,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:40,730 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:31:40,730 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:31:40,730 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:31:40,730 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:31:40,730 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:31:40,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:31:40,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:31:40,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:31:40,731 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:31:40,743 INFO L134 CoverageAnalysis]: Checked inductivity of 1568 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 784 trivial. 0 not checked. [2020-10-27 01:31:40,744 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [932720933] [2020-10-27 01:31:40,744 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:31:40,744 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-27 01:31:40,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496151715] [2020-10-27 01:31:40,745 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-27 01:31:40,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:31:40,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-27 01:31:40,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-27 01:31:40,746 INFO L87 Difference]: Start difference. First operand 129 states and 130 transitions. Second operand 32 states. [2020-10-27 01:31:41,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:31:41,230 INFO L93 Difference]: Finished difference Result 201 states and 204 transitions. [2020-10-27 01:31:41,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-27 01:31:41,231 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 128 [2020-10-27 01:31:41,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:31:41,233 INFO L225 Difference]: With dead ends: 201 [2020-10-27 01:31:41,233 INFO L226 Difference]: Without dead ends: 135 [2020-10-27 01:31:41,234 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-27 01:31:41,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-10-27 01:31:41,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 133. [2020-10-27 01:31:41,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-10-27 01:31:41,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 134 transitions. [2020-10-27 01:31:41,242 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 134 transitions. Word has length 128 [2020-10-27 01:31:41,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:31:41,242 INFO L481 AbstractCegarLoop]: Abstraction has 133 states and 134 transitions. [2020-10-27 01:31:41,242 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-27 01:31:41,242 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 134 transitions. [2020-10-27 01:31:41,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2020-10-27 01:31:41,243 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:31:41,244 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:31:41,244 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-27 01:31:41,244 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:31:41,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:31:41,244 INFO L82 PathProgramCache]: Analyzing trace with hash 354996693, now seen corresponding path program 29 times [2020-10-27 01:31:41,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:31:41,245 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [122649745] [2020-10-27 01:31:41,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:31:41,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:31:41,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:46,478 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:31:46,478 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 142 [2020-10-27 01:31:46,478 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:31:46,478 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5189 [2020-10-27 01:31:46,478 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:31:46,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-27 01:31:46,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:31:46,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-27 01:31:46,479 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:31:47,253 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:31:47,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:31:47,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:47,262 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:31:47,262 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:31:47,262 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:31:47,262 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:31:47,262 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:31:47,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:31:47,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:31:47,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:31:47,263 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:31:47,276 INFO L134 CoverageAnalysis]: Checked inductivity of 1682 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 841 trivial. 0 not checked. [2020-10-27 01:31:47,276 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [122649745] [2020-10-27 01:31:47,277 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:31:47,277 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-27 01:31:47,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644192330] [2020-10-27 01:31:47,277 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-27 01:31:47,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:31:47,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-27 01:31:47,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-27 01:31:47,278 INFO L87 Difference]: Start difference. First operand 133 states and 134 transitions. Second operand 33 states. [2020-10-27 01:31:47,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:31:47,793 INFO L93 Difference]: Finished difference Result 207 states and 210 transitions. [2020-10-27 01:31:47,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-27 01:31:47,795 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 132 [2020-10-27 01:31:47,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:31:47,796 INFO L225 Difference]: With dead ends: 207 [2020-10-27 01:31:47,796 INFO L226 Difference]: Without dead ends: 139 [2020-10-27 01:31:47,798 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-27 01:31:47,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-10-27 01:31:47,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 137. [2020-10-27 01:31:47,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-10-27 01:31:47,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 138 transitions. [2020-10-27 01:31:47,817 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 138 transitions. Word has length 132 [2020-10-27 01:31:47,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:31:47,818 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 138 transitions. [2020-10-27 01:31:47,818 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-27 01:31:47,818 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 138 transitions. [2020-10-27 01:31:47,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-10-27 01:31:47,819 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:31:47,821 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:31:47,821 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-27 01:31:47,822 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:31:47,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:31:47,822 INFO L82 PathProgramCache]: Analyzing trace with hash -1888190375, now seen corresponding path program 30 times [2020-10-27 01:31:47,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:31:47,823 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1483913627] [2020-10-27 01:31:47,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:31:47,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:31:47,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:53,033 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:31:53,034 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 146 [2020-10-27 01:31:53,034 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:31:53,034 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5146 [2020-10-27 01:31:53,034 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:31:53,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-27 01:31:53,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:31:53,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-27 01:31:53,035 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:31:53,827 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:31:53,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:31:53,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:53,832 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:31:53,832 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:31:53,832 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:31:53,832 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:31:53,832 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:31:53,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:31:53,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:31:53,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:31:53,833 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:31:53,847 INFO L134 CoverageAnalysis]: Checked inductivity of 1800 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 900 trivial. 0 not checked. [2020-10-27 01:31:53,848 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1483913627] [2020-10-27 01:31:53,848 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:31:53,848 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-27 01:31:53,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556671445] [2020-10-27 01:31:53,849 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-27 01:31:53,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:31:53,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-27 01:31:53,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-27 01:31:53,850 INFO L87 Difference]: Start difference. First operand 137 states and 138 transitions. Second operand 34 states. [2020-10-27 01:31:54,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:31:54,338 INFO L93 Difference]: Finished difference Result 213 states and 216 transitions. [2020-10-27 01:31:54,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-27 01:31:54,339 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 136 [2020-10-27 01:31:54,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:31:54,340 INFO L225 Difference]: With dead ends: 213 [2020-10-27 01:31:54,340 INFO L226 Difference]: Without dead ends: 143 [2020-10-27 01:31:54,342 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-27 01:31:54,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-10-27 01:31:54,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 141. [2020-10-27 01:31:54,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-27 01:31:54,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 142 transitions. [2020-10-27 01:31:54,354 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 142 transitions. Word has length 136 [2020-10-27 01:31:54,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:31:54,354 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 142 transitions. [2020-10-27 01:31:54,354 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-27 01:31:54,354 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 142 transitions. [2020-10-27 01:31:54,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2020-10-27 01:31:54,356 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:31:54,356 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:31:54,356 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-27 01:31:54,357 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:31:54,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:31:54,357 INFO L82 PathProgramCache]: Analyzing trace with hash 522083549, now seen corresponding path program 31 times [2020-10-27 01:31:54,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:31:54,357 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [156264898] [2020-10-27 01:31:54,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:31:54,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:31:54,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:59,617 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:31:59,617 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 150 [2020-10-27 01:31:59,617 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:31:59,617 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5212 [2020-10-27 01:31:59,617 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:31:59,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-27 01:31:59,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:31:59,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-27 01:31:59,618 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:32:00,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:32:00,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:32:00,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:32:00,500 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:32:00,500 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:32:00,500 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:32:00,501 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:32:00,501 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:32:00,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:32:00,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:32:00,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:32:00,501 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:32:00,522 INFO L134 CoverageAnalysis]: Checked inductivity of 1922 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 961 trivial. 0 not checked. [2020-10-27 01:32:00,523 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [156264898] [2020-10-27 01:32:00,523 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:32:00,523 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-27 01:32:00,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092384123] [2020-10-27 01:32:00,524 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-27 01:32:00,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:32:00,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-27 01:32:00,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-27 01:32:00,525 INFO L87 Difference]: Start difference. First operand 141 states and 142 transitions. Second operand 35 states. [2020-10-27 01:32:01,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:32:01,025 INFO L93 Difference]: Finished difference Result 219 states and 222 transitions. [2020-10-27 01:32:01,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-27 01:32:01,026 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 140 [2020-10-27 01:32:01,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:32:01,028 INFO L225 Difference]: With dead ends: 219 [2020-10-27 01:32:01,028 INFO L226 Difference]: Without dead ends: 147 [2020-10-27 01:32:01,029 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-27 01:32:01,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-10-27 01:32:01,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 145. [2020-10-27 01:32:01,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-27 01:32:01,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 146 transitions. [2020-10-27 01:32:01,036 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 146 transitions. Word has length 140 [2020-10-27 01:32:01,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:32:01,037 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 146 transitions. [2020-10-27 01:32:01,037 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-27 01:32:01,037 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 146 transitions. [2020-10-27 01:32:01,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2020-10-27 01:32:01,038 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:32:01,038 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:32:01,038 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-27 01:32:01,038 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:32:01,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:32:01,039 INFO L82 PathProgramCache]: Analyzing trace with hash 156985185, now seen corresponding path program 32 times [2020-10-27 01:32:01,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:32:01,039 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [630816574] [2020-10-27 01:32:01,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:32:01,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:32:01,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:32:06,233 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:32:06,233 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 154 [2020-10-27 01:32:06,234 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:32:06,234 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5150 [2020-10-27 01:32:06,234 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:32:06,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-27 01:32:06,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:32:06,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-27 01:32:06,234 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:32:07,114 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:32:07,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:32:07,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:32:07,119 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:32:07,119 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:32:07,119 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:32:07,119 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 01:32:07,119 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:32:07,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:32:07,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:32:07,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:32:07,119 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:32:07,134 INFO L134 CoverageAnalysis]: Checked inductivity of 2048 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 1024 trivial. 0 not checked. [2020-10-27 01:32:07,135 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [630816574] [2020-10-27 01:32:07,135 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:32:07,135 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-27 01:32:07,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818830521] [2020-10-27 01:32:07,136 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-27 01:32:07,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:32:07,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-27 01:32:07,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-27 01:32:07,137 INFO L87 Difference]: Start difference. First operand 145 states and 146 transitions. Second operand 36 states. [2020-10-27 01:32:07,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:32:07,660 INFO L93 Difference]: Finished difference Result 225 states and 228 transitions. [2020-10-27 01:32:07,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-27 01:32:07,660 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 144 [2020-10-27 01:32:07,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:32:07,662 INFO L225 Difference]: With dead ends: 225 [2020-10-27 01:32:07,662 INFO L226 Difference]: Without dead ends: 151 [2020-10-27 01:32:07,663 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-27 01:32:07,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-10-27 01:32:07,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 149. [2020-10-27 01:32:07,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-10-27 01:32:07,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 150 transitions. [2020-10-27 01:32:07,670 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 150 transitions. Word has length 144 [2020-10-27 01:32:07,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:32:07,670 INFO L481 AbstractCegarLoop]: Abstraction has 149 states and 150 transitions. [2020-10-27 01:32:07,670 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-27 01:32:07,670 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 150 transitions. [2020-10-27 01:32:07,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-10-27 01:32:07,671 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:32:07,671 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:32:07,672 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-27 01:32:07,672 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:32:07,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:32:07,672 INFO L82 PathProgramCache]: Analyzing trace with hash -505372699, now seen corresponding path program 33 times [2020-10-27 01:32:07,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:32:07,673 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1065578477] [2020-10-27 01:32:07,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:32:07,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:32:07,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:32:12,945 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:32:12,946 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 158 [2020-10-27 01:32:12,946 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:32:12,946 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5229 [2020-10-27 01:32:12,946 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:32:12,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-27 01:32:12,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:32:12,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-27 01:32:12,946 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:32:13,872 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:32:13,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:32:13,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:32:13,876 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:32:13,876 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:32:13,877 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:32:13,877 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:32:13,877 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:32:13,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:32:13,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:32:13,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:32:13,877 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:32:13,893 INFO L134 CoverageAnalysis]: Checked inductivity of 2178 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 1089 trivial. 0 not checked. [2020-10-27 01:32:13,894 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1065578477] [2020-10-27 01:32:13,894 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:32:13,894 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-27 01:32:13,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495451061] [2020-10-27 01:32:13,895 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-27 01:32:13,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:32:13,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-27 01:32:13,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-27 01:32:13,896 INFO L87 Difference]: Start difference. First operand 149 states and 150 transitions. Second operand 37 states. [2020-10-27 01:32:14,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:32:14,294 INFO L93 Difference]: Finished difference Result 231 states and 234 transitions. [2020-10-27 01:32:14,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-27 01:32:14,295 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 148 [2020-10-27 01:32:14,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:32:14,296 INFO L225 Difference]: With dead ends: 231 [2020-10-27 01:32:14,296 INFO L226 Difference]: Without dead ends: 155 [2020-10-27 01:32:14,297 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-27 01:32:14,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-10-27 01:32:14,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 153. [2020-10-27 01:32:14,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2020-10-27 01:32:14,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 154 transitions. [2020-10-27 01:32:14,305 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 154 transitions. Word has length 148 [2020-10-27 01:32:14,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:32:14,306 INFO L481 AbstractCegarLoop]: Abstraction has 153 states and 154 transitions. [2020-10-27 01:32:14,306 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-27 01:32:14,306 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 154 transitions. [2020-10-27 01:32:14,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2020-10-27 01:32:14,307 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:32:14,307 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:32:14,307 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-27 01:32:14,307 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:32:14,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:32:14,308 INFO L82 PathProgramCache]: Analyzing trace with hash 182650473, now seen corresponding path program 34 times [2020-10-27 01:32:14,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:32:14,308 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [385514466] [2020-10-27 01:32:14,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:32:14,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:32:14,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:32:19,683 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:32:19,683 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 162 [2020-10-27 01:32:19,683 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:32:19,683 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5328 [2020-10-27 01:32:19,683 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:32:19,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-27 01:32:19,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:32:19,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-27 01:32:19,684 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:32:20,731 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:32:20,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:32:20,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:32:20,736 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:32:20,736 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:32:20,736 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:32:20,736 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 01:32:20,736 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:32:20,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:32:20,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:32:20,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:32:20,737 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:32:20,753 INFO L134 CoverageAnalysis]: Checked inductivity of 2312 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 1156 trivial. 0 not checked. [2020-10-27 01:32:20,753 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [385514466] [2020-10-27 01:32:20,753 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:32:20,753 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-27 01:32:20,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499654445] [2020-10-27 01:32:20,754 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-27 01:32:20,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:32:20,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-27 01:32:20,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-27 01:32:20,755 INFO L87 Difference]: Start difference. First operand 153 states and 154 transitions. Second operand 38 states. [2020-10-27 01:32:21,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:32:21,296 INFO L93 Difference]: Finished difference Result 237 states and 240 transitions. [2020-10-27 01:32:21,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-27 01:32:21,297 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 152 [2020-10-27 01:32:21,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:32:21,298 INFO L225 Difference]: With dead ends: 237 [2020-10-27 01:32:21,298 INFO L226 Difference]: Without dead ends: 159 [2020-10-27 01:32:21,299 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-27 01:32:21,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-10-27 01:32:21,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 157. [2020-10-27 01:32:21,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-10-27 01:32:21,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 158 transitions. [2020-10-27 01:32:21,306 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 158 transitions. Word has length 152 [2020-10-27 01:32:21,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:32:21,306 INFO L481 AbstractCegarLoop]: Abstraction has 157 states and 158 transitions. [2020-10-27 01:32:21,306 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-27 01:32:21,307 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 158 transitions. [2020-10-27 01:32:21,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2020-10-27 01:32:21,307 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:32:21,308 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:32:21,308 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-27 01:32:21,308 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:32:21,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:32:21,309 INFO L82 PathProgramCache]: Analyzing trace with hash 890739437, now seen corresponding path program 35 times [2020-10-27 01:32:21,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:32:21,309 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1849667673] [2020-10-27 01:32:21,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:32:21,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:32:21,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:32:26,704 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:32:26,704 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 166 [2020-10-27 01:32:26,705 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:32:26,705 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5355 [2020-10-27 01:32:26,705 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:32:26,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-27 01:32:26,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:32:26,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-27 01:32:26,705 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:32:27,736 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:32:27,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:32:27,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:32:27,741 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:32:27,741 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:32:27,742 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:32:27,742 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:32:27,742 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:32:27,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:32:27,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:32:27,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:32:27,742 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:32:27,760 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 1225 trivial. 0 not checked. [2020-10-27 01:32:27,761 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1849667673] [2020-10-27 01:32:27,761 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:32:27,761 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-27 01:32:27,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377728393] [2020-10-27 01:32:27,762 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-27 01:32:27,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:32:27,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-27 01:32:27,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-27 01:32:27,763 INFO L87 Difference]: Start difference. First operand 157 states and 158 transitions. Second operand 39 states. [2020-10-27 01:32:28,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:32:28,310 INFO L93 Difference]: Finished difference Result 243 states and 246 transitions. [2020-10-27 01:32:28,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-27 01:32:28,310 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 156 [2020-10-27 01:32:28,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:32:28,312 INFO L225 Difference]: With dead ends: 243 [2020-10-27 01:32:28,312 INFO L226 Difference]: Without dead ends: 163 [2020-10-27 01:32:28,313 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-27 01:32:28,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-10-27 01:32:28,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 161. [2020-10-27 01:32:28,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-10-27 01:32:28,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 162 transitions. [2020-10-27 01:32:28,319 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 162 transitions. Word has length 156 [2020-10-27 01:32:28,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:32:28,320 INFO L481 AbstractCegarLoop]: Abstraction has 161 states and 162 transitions. [2020-10-27 01:32:28,320 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-27 01:32:28,320 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 162 transitions. [2020-10-27 01:32:28,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2020-10-27 01:32:28,321 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:32:28,321 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:32:28,321 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-27 01:32:28,321 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:32:28,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:32:28,322 INFO L82 PathProgramCache]: Analyzing trace with hash -541893263, now seen corresponding path program 36 times [2020-10-27 01:32:28,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:32:28,322 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [78233451] [2020-10-27 01:32:28,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:32:28,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:32:28,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:32:33,471 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:32:33,471 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 170 [2020-10-27 01:32:33,471 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:32:33,471 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5095 [2020-10-27 01:32:33,472 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:32:33,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-27 01:32:33,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:32:33,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-27 01:32:33,472 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:32:34,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:32:34,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:32:34,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:32:34,533 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:32:34,533 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:32:34,533 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:32:34,533 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 01:32:34,533 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:32:34,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:32:34,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:32:34,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:32:34,534 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:32:34,552 INFO L134 CoverageAnalysis]: Checked inductivity of 2592 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 1296 trivial. 0 not checked. [2020-10-27 01:32:34,553 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [78233451] [2020-10-27 01:32:34,553 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:32:34,553 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-27 01:32:34,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496329349] [2020-10-27 01:32:34,553 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-27 01:32:34,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:32:34,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-27 01:32:34,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-27 01:32:34,555 INFO L87 Difference]: Start difference. First operand 161 states and 162 transitions. Second operand 40 states. [2020-10-27 01:32:35,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:32:35,164 INFO L93 Difference]: Finished difference Result 249 states and 252 transitions. [2020-10-27 01:32:35,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-27 01:32:35,165 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 160 [2020-10-27 01:32:35,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:32:35,166 INFO L225 Difference]: With dead ends: 249 [2020-10-27 01:32:35,167 INFO L226 Difference]: Without dead ends: 167 [2020-10-27 01:32:35,168 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-27 01:32:35,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-10-27 01:32:35,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 165. [2020-10-27 01:32:35,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-10-27 01:32:35,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 166 transitions. [2020-10-27 01:32:35,175 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 166 transitions. Word has length 160 [2020-10-27 01:32:35,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:32:35,175 INFO L481 AbstractCegarLoop]: Abstraction has 165 states and 166 transitions. [2020-10-27 01:32:35,175 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-27 01:32:35,175 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 166 transitions. [2020-10-27 01:32:35,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2020-10-27 01:32:35,176 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:32:35,176 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:32:35,176 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-27 01:32:35,176 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:32:35,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:32:35,177 INFO L82 PathProgramCache]: Analyzing trace with hash -664056331, now seen corresponding path program 37 times [2020-10-27 01:32:35,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:32:35,177 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1446460426] [2020-10-27 01:32:35,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:32:35,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:32:35,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:32:40,338 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:32:40,338 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 174 [2020-10-27 01:32:40,338 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:32:40,338 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5125 [2020-10-27 01:32:40,339 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:32:40,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-27 01:32:40,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:32:40,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-27 01:32:40,339 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:32:41,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:32:41,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:32:41,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:32:41,532 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:32:41,533 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:32:41,533 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:32:41,533 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:32:41,533 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:32:41,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:32:41,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:32:41,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:32:41,533 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:32:41,552 INFO L134 CoverageAnalysis]: Checked inductivity of 2738 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 1369 trivial. 0 not checked. [2020-10-27 01:32:41,552 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1446460426] [2020-10-27 01:32:41,553 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:32:41,553 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-27 01:32:41,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068179546] [2020-10-27 01:32:41,553 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-27 01:32:41,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:32:41,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-27 01:32:41,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-27 01:32:41,555 INFO L87 Difference]: Start difference. First operand 165 states and 166 transitions. Second operand 41 states. [2020-10-27 01:32:42,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:32:42,045 INFO L93 Difference]: Finished difference Result 255 states and 258 transitions. [2020-10-27 01:32:42,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-27 01:32:42,046 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 164 [2020-10-27 01:32:42,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:32:42,047 INFO L225 Difference]: With dead ends: 255 [2020-10-27 01:32:42,047 INFO L226 Difference]: Without dead ends: 171 [2020-10-27 01:32:42,048 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-27 01:32:42,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2020-10-27 01:32:42,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 169. [2020-10-27 01:32:42,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-10-27 01:32:42,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 170 transitions. [2020-10-27 01:32:42,054 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 170 transitions. Word has length 164 [2020-10-27 01:32:42,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:32:42,055 INFO L481 AbstractCegarLoop]: Abstraction has 169 states and 170 transitions. [2020-10-27 01:32:42,055 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-27 01:32:42,055 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 170 transitions. [2020-10-27 01:32:42,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2020-10-27 01:32:42,056 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:32:42,056 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:32:42,056 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-27 01:32:42,056 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:32:42,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:32:42,057 INFO L82 PathProgramCache]: Analyzing trace with hash -1149997959, now seen corresponding path program 38 times [2020-10-27 01:32:42,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:32:42,057 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [312597809] [2020-10-27 01:32:42,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:32:42,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:32:42,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:32:47,167 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:32:47,168 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 178 [2020-10-27 01:32:47,168 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:32:47,168 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5059 [2020-10-27 01:32:47,168 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:32:47,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-27 01:32:47,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:32:47,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-27 01:32:47,168 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:32:48,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:32:48,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:32:48,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:32:48,402 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:32:48,402 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:32:48,402 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:32:48,402 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 01:32:48,402 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:32:48,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:32:48,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:32:48,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:32:48,403 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:32:48,421 INFO L134 CoverageAnalysis]: Checked inductivity of 2888 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 1444 trivial. 0 not checked. [2020-10-27 01:32:48,422 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [312597809] [2020-10-27 01:32:48,422 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:32:48,422 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-10-27 01:32:48,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599306678] [2020-10-27 01:32:48,423 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-27 01:32:48,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:32:48,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-27 01:32:48,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-10-27 01:32:48,424 INFO L87 Difference]: Start difference. First operand 169 states and 170 transitions. Second operand 42 states. [2020-10-27 01:32:49,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:32:49,040 INFO L93 Difference]: Finished difference Result 261 states and 264 transitions. [2020-10-27 01:32:49,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-27 01:32:49,041 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 168 [2020-10-27 01:32:49,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:32:49,042 INFO L225 Difference]: With dead ends: 261 [2020-10-27 01:32:49,042 INFO L226 Difference]: Without dead ends: 175 [2020-10-27 01:32:49,043 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-10-27 01:32:49,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-10-27 01:32:49,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 173. [2020-10-27 01:32:49,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2020-10-27 01:32:49,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 174 transitions. [2020-10-27 01:32:49,049 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 174 transitions. Word has length 168 [2020-10-27 01:32:49,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:32:49,049 INFO L481 AbstractCegarLoop]: Abstraction has 173 states and 174 transitions. [2020-10-27 01:32:49,049 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-27 01:32:49,050 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 174 transitions. [2020-10-27 01:32:49,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2020-10-27 01:32:49,051 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:32:49,051 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:32:49,051 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-27 01:32:49,051 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:32:49,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:32:49,052 INFO L82 PathProgramCache]: Analyzing trace with hash 1938012413, now seen corresponding path program 39 times [2020-10-27 01:32:49,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:32:49,052 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [291380050] [2020-10-27 01:32:49,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:32:49,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:32:49,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:32:49,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:32:54,349 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:32:54,350 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 182 [2020-10-27 01:32:54,350 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:32:54,350 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5246 [2020-10-27 01:32:54,350 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:32:54,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 41 [2020-10-27 01:32:54,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:32:54,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-27 01:32:54,351 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:32:55,570 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:32:55,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:32:55,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:32:55,575 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:32:55,575 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:32:55,575 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:32:55,576 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:32:55,576 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:32:55,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:32:55,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:32:55,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:32:55,576 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:32:55,597 INFO L134 CoverageAnalysis]: Checked inductivity of 3042 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 1521 trivial. 0 not checked. [2020-10-27 01:32:55,597 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [291380050] [2020-10-27 01:32:55,597 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:32:55,597 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-10-27 01:32:55,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762257302] [2020-10-27 01:32:55,598 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-27 01:32:55,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:32:55,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-27 01:32:55,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2020-10-27 01:32:55,599 INFO L87 Difference]: Start difference. First operand 173 states and 174 transitions. Second operand 43 states. [2020-10-27 01:32:56,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:32:56,228 INFO L93 Difference]: Finished difference Result 267 states and 270 transitions. [2020-10-27 01:32:56,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-27 01:32:56,228 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 172 [2020-10-27 01:32:56,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:32:56,230 INFO L225 Difference]: With dead ends: 267 [2020-10-27 01:32:56,230 INFO L226 Difference]: Without dead ends: 179 [2020-10-27 01:32:56,231 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2020-10-27 01:32:56,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2020-10-27 01:32:56,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 177. [2020-10-27 01:32:56,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2020-10-27 01:32:56,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 178 transitions. [2020-10-27 01:32:56,239 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 178 transitions. Word has length 172 [2020-10-27 01:32:56,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:32:56,240 INFO L481 AbstractCegarLoop]: Abstraction has 177 states and 178 transitions. [2020-10-27 01:32:56,240 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-27 01:32:56,240 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 178 transitions. [2020-10-27 01:32:56,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2020-10-27 01:32:56,241 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:32:56,241 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:32:56,241 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-27 01:32:56,241 INFO L429 AbstractCegarLoop]: === Iteration 42 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:32:56,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:32:56,242 INFO L82 PathProgramCache]: Analyzing trace with hash -1177668735, now seen corresponding path program 40 times [2020-10-27 01:32:56,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:32:56,242 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1585314992] [2020-10-27 01:32:56,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:32:56,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:32:56,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:01,477 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:33:01,477 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 186 [2020-10-27 01:33:01,477 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:33:01,477 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5181 [2020-10-27 01:33:01,478 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:33:01,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 42 [2020-10-27 01:33:01,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:33:01,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-27 01:33:01,478 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:33:02,802 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:33:02,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:33:02,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:02,807 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:33:02,807 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:33:02,808 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:33:02,808 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:33:02,808 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:33:02,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:33:02,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:33:02,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:33:02,808 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:33:02,829 INFO L134 CoverageAnalysis]: Checked inductivity of 3200 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 1600 trivial. 0 not checked. [2020-10-27 01:33:02,829 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1585314992] [2020-10-27 01:33:02,830 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:33:02,830 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-10-27 01:33:02,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52230625] [2020-10-27 01:33:02,830 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-10-27 01:33:02,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:33:02,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-10-27 01:33:02,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2020-10-27 01:33:02,831 INFO L87 Difference]: Start difference. First operand 177 states and 178 transitions. Second operand 44 states. [2020-10-27 01:33:03,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:33:03,462 INFO L93 Difference]: Finished difference Result 273 states and 276 transitions. [2020-10-27 01:33:03,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-27 01:33:03,470 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 176 [2020-10-27 01:33:03,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:33:03,471 INFO L225 Difference]: With dead ends: 273 [2020-10-27 01:33:03,471 INFO L226 Difference]: Without dead ends: 183 [2020-10-27 01:33:03,472 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2020-10-27 01:33:03,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-10-27 01:33:03,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 181. [2020-10-27 01:33:03,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2020-10-27 01:33:03,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 182 transitions. [2020-10-27 01:33:03,479 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 182 transitions. Word has length 176 [2020-10-27 01:33:03,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:33:03,479 INFO L481 AbstractCegarLoop]: Abstraction has 181 states and 182 transitions. [2020-10-27 01:33:03,479 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-10-27 01:33:03,479 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 182 transitions. [2020-10-27 01:33:03,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2020-10-27 01:33:03,481 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:33:03,481 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:33:03,481 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-27 01:33:03,481 INFO L429 AbstractCegarLoop]: === Iteration 43 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:33:03,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:33:03,482 INFO L82 PathProgramCache]: Analyzing trace with hash -1777804283, now seen corresponding path program 41 times [2020-10-27 01:33:03,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:33:03,482 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1898872997] [2020-10-27 01:33:03,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:33:03,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:33:03,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:08,893 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:33:08,893 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 190 [2020-10-27 01:33:08,893 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:33:08,893 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5363 [2020-10-27 01:33:08,893 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:33:08,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 43 [2020-10-27 01:33:08,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:33:08,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 84 [2020-10-27 01:33:08,894 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0