/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/eca-rers2012/Problem13_label35.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-26 23:11:55,901 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-26 23:11:55,906 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-26 23:11:55,953 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-26 23:11:55,954 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-26 23:11:55,955 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-26 23:11:55,957 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-26 23:11:55,960 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-26 23:11:55,962 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-26 23:11:55,964 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-26 23:11:55,965 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-26 23:11:55,967 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-26 23:11:55,967 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-26 23:11:55,969 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-26 23:11:55,970 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-26 23:11:55,972 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-26 23:11:55,973 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-26 23:11:55,975 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-26 23:11:55,977 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-26 23:11:55,980 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-26 23:11:55,982 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-26 23:11:55,984 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-26 23:11:55,986 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-26 23:11:55,987 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-26 23:11:55,991 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-26 23:11:55,992 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-26 23:11:56,013 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-26 23:11:56,015 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-26 23:11:56,016 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-26 23:11:56,018 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-26 23:11:56,018 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-26 23:11:56,020 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-26 23:11:56,021 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-26 23:11:56,022 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-26 23:11:56,024 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-26 23:11:56,024 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-26 23:11:56,025 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-26 23:11:56,026 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-26 23:11:56,026 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-26 23:11:56,027 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-26 23:11:56,028 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-26 23:11:56,030 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 [2020-10-26 23:11:56,068 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-26 23:11:56,068 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-26 23:11:56,070 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-26 23:11:56,070 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-26 23:11:56,071 INFO L138 SettingsManager]: * Use SBE=true [2020-10-26 23:11:56,071 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-26 23:11:56,071 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-26 23:11:56,072 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-26 23:11:56,072 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-26 23:11:56,072 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-26 23:11:56,072 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-26 23:11:56,073 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-26 23:11:56,073 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-26 23:11:56,073 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-26 23:11:56,074 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-26 23:11:56,074 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-26 23:11:56,074 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-26 23:11:56,074 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-26 23:11:56,075 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-26 23:11:56,075 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-26 23:11:56,075 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-26 23:11:56,076 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 23:11:56,076 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-26 23:11:56,076 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-26 23:11:56,077 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-26 23:11:56,077 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-26 23:11:56,077 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-26 23:11:56,078 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-26 23:11:56,078 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-26 23:11:56,078 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-26 23:11:56,532 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-26 23:11:56,560 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-26 23:11:56,563 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-26 23:11:56,565 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-26 23:11:56,566 INFO L275 PluginConnector]: CDTParser initialized [2020-10-26 23:11:56,567 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem13_label35.c [2020-10-26 23:11:56,664 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ff11766f1/3b57d3cda9ef462db243a9f926d55101/FLAG087853218 [2020-10-26 23:11:57,863 INFO L306 CDTParser]: Found 1 translation units. [2020-10-26 23:11:57,864 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem13_label35.c [2020-10-26 23:11:57,907 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ff11766f1/3b57d3cda9ef462db243a9f926d55101/FLAG087853218 [2020-10-26 23:11:58,214 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ff11766f1/3b57d3cda9ef462db243a9f926d55101 [2020-10-26 23:11:58,220 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-26 23:11:58,231 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-26 23:11:58,236 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-26 23:11:58,237 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-26 23:11:58,242 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-26 23:11:58,243 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 11:11:58" (1/1) ... [2020-10-26 23:11:58,249 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1fcb6a42 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:11:58, skipping insertion in model container [2020-10-26 23:11:58,250 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 11:11:58" (1/1) ... [2020-10-26 23:11:58,262 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-26 23:11:58,493 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-26 23:12:00,245 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 23:12:00,258 INFO L203 MainTranslator]: Completed pre-run [2020-10-26 23:12:01,289 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 23:12:01,338 INFO L208 MainTranslator]: Completed translation [2020-10-26 23:12:01,338 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:12:01 WrapperNode [2020-10-26 23:12:01,338 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-26 23:12:01,340 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-26 23:12:01,340 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-26 23:12:01,340 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-26 23:12:01,357 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:12:01" (1/1) ... [2020-10-26 23:12:01,359 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:12:01" (1/1) ... [2020-10-26 23:12:01,504 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:12:01" (1/1) ... [2020-10-26 23:12:01,505 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:12:01" (1/1) ... [2020-10-26 23:12:01,685 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:12:01" (1/1) ... [2020-10-26 23:12:01,721 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:12:01" (1/1) ... [2020-10-26 23:12:01,765 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:12:01" (1/1) ... [2020-10-26 23:12:01,805 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-26 23:12:01,806 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-26 23:12:01,807 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-26 23:12:01,807 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-26 23:12:01,808 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:12:01" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 23:12:01,902 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-26 23:12:01,902 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-26 23:12:01,903 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-26 23:12:01,903 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-26 23:12:01,903 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-26 23:12:01,904 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-26 23:12:01,904 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-26 23:12:01,905 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-26 23:12:01,905 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-26 23:12:01,905 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-26 23:12:01,906 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-26 23:12:01,906 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-26 23:12:01,906 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-26 23:12:01,907 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-26 23:12:01,907 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-26 23:12:01,908 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-26 23:12:01,908 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-26 23:12:01,908 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-26 23:12:01,908 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-26 23:12:01,908 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-26 23:12:01,908 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-26 23:12:01,908 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-26 23:12:01,909 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-26 23:12:01,909 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-26 23:12:01,909 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-26 23:12:16,810 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-26 23:12:16,812 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-26 23:12:16,821 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 11:12:16 BoogieIcfgContainer [2020-10-26 23:12:16,822 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-26 23:12:16,827 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-26 23:12:16,828 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-26 23:12:16,833 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-26 23:12:16,834 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 11:11:58" (1/3) ... [2020-10-26 23:12:16,835 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c89a5a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 11:12:16, skipping insertion in model container [2020-10-26 23:12:16,836 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:12:01" (2/3) ... [2020-10-26 23:12:16,836 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c89a5a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 11:12:16, skipping insertion in model container [2020-10-26 23:12:16,836 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 11:12:16" (3/3) ... [2020-10-26 23:12:16,840 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem13_label35.c [2020-10-26 23:12:16,860 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-26 23:12:16,869 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-26 23:12:16,888 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-26 23:12:16,947 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-26 23:12:16,947 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-26 23:12:16,947 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-26 23:12:16,947 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-26 23:12:16,948 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-26 23:12:16,948 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-26 23:12:16,948 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-26 23:12:16,948 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-26 23:12:17,008 INFO L276 IsEmpty]: Start isEmpty. Operand 1123 states. [2020-10-26 23:12:17,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-26 23:12:17,023 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:12:17,024 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 23:12:17,025 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:12:17,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:12:17,036 INFO L82 PathProgramCache]: Analyzing trace with hash -860682086, now seen corresponding path program 1 times [2020-10-26 23:12:17,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:12:17,050 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [352836973] [2020-10-26 23:12:17,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:12:17,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:12:17,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:12:17,891 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:12:17,891 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-26 23:12:17,892 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:12:17,892 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 640 [2020-10-26 23:12:17,896 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:12:17,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 23:12:17,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 23:12:17,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-26 23:12:17,897 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-26 23:12:18,045 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:12:18,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:12:18,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:12:18,100 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:12:18,100 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:12:18,100 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:12:18,101 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 41 [2020-10-26 23:12:18,101 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:12:18,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:12:18,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:12:18,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:12:18,102 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:12:18,128 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 23:12:18,129 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [352836973] [2020-10-26 23:12:18,132 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 23:12:18,132 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-26 23:12:18,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046075662] [2020-10-26 23:12:18,139 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 23:12:18,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:12:18,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 23:12:18,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 23:12:18,160 INFO L87 Difference]: Start difference. First operand 1123 states. Second operand 4 states. [2020-10-26 23:12:38,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:12:38,337 INFO L93 Difference]: Finished difference Result 3248 states and 5954 transitions. [2020-10-26 23:12:38,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 23:12:38,340 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2020-10-26 23:12:38,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:12:38,386 INFO L225 Difference]: With dead ends: 3248 [2020-10-26 23:12:38,386 INFO L226 Difference]: Without dead ends: 2046 [2020-10-26 23:12:38,398 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-26 23:12:38,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2046 states. [2020-10-26 23:12:38,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2046 to 1989. [2020-10-26 23:12:38,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1989 states. [2020-10-26 23:12:38,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1989 states to 1989 states and 3534 transitions. [2020-10-26 23:12:38,613 INFO L78 Accepts]: Start accepts. Automaton has 1989 states and 3534 transitions. Word has length 17 [2020-10-26 23:12:38,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:12:38,614 INFO L481 AbstractCegarLoop]: Abstraction has 1989 states and 3534 transitions. [2020-10-26 23:12:38,614 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 23:12:38,614 INFO L276 IsEmpty]: Start isEmpty. Operand 1989 states and 3534 transitions. [2020-10-26 23:12:38,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-10-26 23:12:38,618 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:12:38,619 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 23:12:38,619 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-26 23:12:38,619 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:12:38,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:12:38,620 INFO L82 PathProgramCache]: Analyzing trace with hash 153564821, now seen corresponding path program 1 times [2020-10-26 23:12:38,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:12:38,621 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1374905206] [2020-10-26 23:12:38,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:12:38,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:12:38,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:12:39,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:12:39,595 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:12:39,596 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 98 [2020-10-26 23:12:39,596 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 23:12:39,596 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 930 [2020-10-26 23:12:39,597 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:12:39,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 23:12:39,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 23:12:39,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-26 23:12:39,598 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 23:12:39,713 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:12:39,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:12:39,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:12:39,771 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:12:39,773 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:12:39,773 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:12:39,775 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 46 [2020-10-26 23:12:39,775 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:12:39,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:12:39,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:12:39,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:12:39,777 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-26 23:12:39,812 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:12:39,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:12:39,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:12:40,068 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:12:40,068 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-26 23:12:40,068 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:12:40,068 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 222 [2020-10-26 23:12:40,069 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:12:40,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:12:40,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:12:40,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-26 23:12:40,069 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:12:40,176 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 23:12:40,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1374905206] [2020-10-26 23:12:40,177 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 23:12:40,177 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-26 23:12:40,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800476932] [2020-10-26 23:12:40,180 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 23:12:40,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:12:40,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 23:12:40,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 23:12:40,184 INFO L87 Difference]: Start difference. First operand 1989 states and 3534 transitions. Second operand 7 states. [2020-10-26 23:13:03,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:13:03,749 INFO L93 Difference]: Finished difference Result 5735 states and 10346 transitions. [2020-10-26 23:13:03,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 23:13:03,751 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 86 [2020-10-26 23:13:03,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:13:03,775 INFO L225 Difference]: With dead ends: 5735 [2020-10-26 23:13:03,775 INFO L226 Difference]: Without dead ends: 3752 [2020-10-26 23:13:03,783 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-26 23:13:03,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3752 states. [2020-10-26 23:13:03,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3752 to 3679. [2020-10-26 23:13:03,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3679 states. [2020-10-26 23:13:03,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3679 states to 3679 states and 5735 transitions. [2020-10-26 23:13:03,914 INFO L78 Accepts]: Start accepts. Automaton has 3679 states and 5735 transitions. Word has length 86 [2020-10-26 23:13:03,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:13:03,915 INFO L481 AbstractCegarLoop]: Abstraction has 3679 states and 5735 transitions. [2020-10-26 23:13:03,915 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 23:13:03,915 INFO L276 IsEmpty]: Start isEmpty. Operand 3679 states and 5735 transitions. [2020-10-26 23:13:03,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-10-26 23:13:03,918 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:13:03,919 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 23:13:03,919 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-26 23:13:03,919 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:13:03,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:13:03,920 INFO L82 PathProgramCache]: Analyzing trace with hash -1391430783, now seen corresponding path program 1 times [2020-10-26 23:13:03,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:13:03,921 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [417773506] [2020-10-26 23:13:03,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:13:03,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:13:03,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:13:04,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:13:05,016 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:13:05,017 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-10-26 23:13:05,017 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 23:13:05,017 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1051 [2020-10-26 23:13:05,017 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:13:05,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 23:13:05,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 23:13:05,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-26 23:13:05,018 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:13:05,166 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:13:05,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:13:05,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:13:05,196 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:13:05,197 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:13:05,197 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:13:05,197 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-26 23:13:05,197 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:13:05,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:13:05,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:13:05,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:13:05,198 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:13:05,227 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:13:05,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:13:05,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:13:05,465 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:13:05,465 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-26 23:13:05,466 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:13:05,466 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 207 [2020-10-26 23:13:05,466 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:13:05,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:13:05,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:13:05,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-26 23:13:05,467 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:13:05,581 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 23:13:05,581 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [417773506] [2020-10-26 23:13:05,581 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 23:13:05,582 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-26 23:13:05,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214961509] [2020-10-26 23:13:05,583 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 23:13:05,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:13:05,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 23:13:05,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 23:13:05,586 INFO L87 Difference]: Start difference. First operand 3679 states and 5735 transitions. Second operand 7 states. [2020-10-26 23:13:36,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:13:36,426 INFO L93 Difference]: Finished difference Result 11013 states and 17599 transitions. [2020-10-26 23:13:36,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 23:13:36,427 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 92 [2020-10-26 23:13:36,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:13:36,472 INFO L225 Difference]: With dead ends: 11013 [2020-10-26 23:13:36,473 INFO L226 Difference]: Without dead ends: 7340 [2020-10-26 23:13:36,485 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-10-26 23:13:36,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7340 states. [2020-10-26 23:13:36,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7340 to 7194. [2020-10-26 23:13:36,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7194 states. [2020-10-26 23:13:36,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7194 states to 7194 states and 10321 transitions. [2020-10-26 23:13:36,720 INFO L78 Accepts]: Start accepts. Automaton has 7194 states and 10321 transitions. Word has length 92 [2020-10-26 23:13:36,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:13:36,721 INFO L481 AbstractCegarLoop]: Abstraction has 7194 states and 10321 transitions. [2020-10-26 23:13:36,721 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 23:13:36,721 INFO L276 IsEmpty]: Start isEmpty. Operand 7194 states and 10321 transitions. [2020-10-26 23:13:36,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-10-26 23:13:36,723 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:13:36,724 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 23:13:36,724 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-26 23:13:36,724 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:13:36,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:13:36,725 INFO L82 PathProgramCache]: Analyzing trace with hash -1831550947, now seen corresponding path program 1 times [2020-10-26 23:13:36,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:13:36,725 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1780008220] [2020-10-26 23:13:36,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:13:36,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:13:36,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:13:37,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:13:37,915 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:13:37,915 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 134 [2020-10-26 23:13:37,916 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 23:13:37,916 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1145 [2020-10-26 23:13:37,916 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:13:37,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 23:13:37,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 23:13:37,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 111 [2020-10-26 23:13:37,917 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:13:38,057 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:13:38,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:13:38,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:13:38,079 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:13:38,079 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:13:38,079 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:13:38,080 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-26 23:13:38,080 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:13:38,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:13:38,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:13:38,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:13:38,080 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:13:38,115 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:13:38,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:13:38,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:13:38,340 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:13:38,341 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-10-26 23:13:38,341 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:13:38,341 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 196 [2020-10-26 23:13:38,341 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:13:38,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:13:38,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:13:38,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 106 [2020-10-26 23:13:38,342 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:13:38,480 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 23:13:38,481 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1780008220] [2020-10-26 23:13:38,482 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 23:13:38,482 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-26 23:13:38,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483469742] [2020-10-26 23:13:38,484 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 23:13:38,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:13:38,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 23:13:38,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 23:13:38,491 INFO L87 Difference]: Start difference. First operand 7194 states and 10321 transitions. Second operand 7 states. [2020-10-26 23:14:06,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:14:06,515 INFO L93 Difference]: Finished difference Result 15808 states and 23753 transitions. [2020-10-26 23:14:06,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-26 23:14:06,519 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 122 [2020-10-26 23:14:06,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:14:06,595 INFO L225 Difference]: With dead ends: 15808 [2020-10-26 23:14:06,596 INFO L226 Difference]: Without dead ends: 8620 [2020-10-26 23:14:06,620 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2020-10-26 23:14:06,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8620 states. [2020-10-26 23:14:07,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8620 to 8100. [2020-10-26 23:14:07,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8100 states. [2020-10-26 23:14:07,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8100 states to 8100 states and 11374 transitions. [2020-10-26 23:14:07,050 INFO L78 Accepts]: Start accepts. Automaton has 8100 states and 11374 transitions. Word has length 122 [2020-10-26 23:14:07,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:14:07,052 INFO L481 AbstractCegarLoop]: Abstraction has 8100 states and 11374 transitions. [2020-10-26 23:14:07,053 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 23:14:07,053 INFO L276 IsEmpty]: Start isEmpty. Operand 8100 states and 11374 transitions. [2020-10-26 23:14:07,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2020-10-26 23:14:07,067 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:14:07,067 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 23:14:07,067 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-26 23:14:07,068 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:14:07,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:14:07,070 INFO L82 PathProgramCache]: Analyzing trace with hash 1964938449, now seen corresponding path program 1 times [2020-10-26 23:14:07,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:14:07,071 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [4866638] [2020-10-26 23:14:07,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:14:07,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:14:07,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:14:07,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:14:08,886 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:14:08,887 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 144 [2020-10-26 23:14:08,887 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 23:14:08,887 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1764 [2020-10-26 23:14:08,888 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:14:08,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 23:14:08,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 23:14:08,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 121 [2020-10-26 23:14:08,889 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 23:14:09,092 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-26 23:14:09,094 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:14:09,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:14:09,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:14:09,130 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:14:09,130 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:14:09,130 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:14:09,131 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-26 23:14:09,131 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:14:09,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:14:09,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:14:09,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:14:09,132 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 23:14:09,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:14:09,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:14:09,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:14:09,462 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:14:09,463 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 116 [2020-10-26 23:14:09,463 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:14:09,463 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 248 [2020-10-26 23:14:09,463 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:14:09,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:14:09,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:14:09,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 116 [2020-10-26 23:14:09,464 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:14:09,840 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 23:14:09,841 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [4866638] [2020-10-26 23:14:09,841 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 23:14:09,841 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-26 23:14:09,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614558553] [2020-10-26 23:14:09,843 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 23:14:09,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:14:09,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 23:14:09,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 23:14:09,845 INFO L87 Difference]: Start difference. First operand 8100 states and 11374 transitions. Second operand 7 states. [2020-10-26 23:14:10,015 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-10-26 23:14:11,163 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-10-26 23:14:31,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:14:31,859 INFO L93 Difference]: Finished difference Result 15836 states and 22692 transitions. [2020-10-26 23:14:31,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-26 23:14:31,869 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 132 [2020-10-26 23:14:31,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:14:31,913 INFO L225 Difference]: With dead ends: 15836 [2020-10-26 23:14:31,913 INFO L226 Difference]: Without dead ends: 8545 [2020-10-26 23:14:31,930 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2020-10-26 23:14:31,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8545 states. [2020-10-26 23:14:32,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8545 to 8152. [2020-10-26 23:14:32,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8152 states. [2020-10-26 23:14:32,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8152 states to 8152 states and 11382 transitions. [2020-10-26 23:14:32,183 INFO L78 Accepts]: Start accepts. Automaton has 8152 states and 11382 transitions. Word has length 132 [2020-10-26 23:14:32,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:14:32,183 INFO L481 AbstractCegarLoop]: Abstraction has 8152 states and 11382 transitions. [2020-10-26 23:14:32,184 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 23:14:32,184 INFO L276 IsEmpty]: Start isEmpty. Operand 8152 states and 11382 transitions. [2020-10-26 23:14:32,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-10-26 23:14:32,187 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:14:32,187 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 23:14:32,187 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-26 23:14:32,187 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:14:32,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:14:32,188 INFO L82 PathProgramCache]: Analyzing trace with hash 189894484, now seen corresponding path program 1 times [2020-10-26 23:14:32,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:14:32,188 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2068834719] [2020-10-26 23:14:32,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:14:32,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:14:32,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:14:32,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:14:33,157 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:14:33,157 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 158 [2020-10-26 23:14:33,158 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 23:14:33,158 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 904 [2020-10-26 23:14:33,158 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:14:33,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 23:14:33,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 23:14:33,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 149 [2020-10-26 23:14:33,159 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:14:33,370 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-26 23:14:33,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:14:33,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:14:33,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:14:33,389 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:14:33,390 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:14:33,390 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:14:33,390 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-26 23:14:33,390 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:14:33,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:14:33,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:14:33,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:14:33,391 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:14:33,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:14:33,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:14:33,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:14:33,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:14:33,757 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:14:33,758 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 130 [2020-10-26 23:14:33,758 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 23:14:33,758 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 308 [2020-10-26 23:14:33,758 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:14:33,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:14:33,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:14:33,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 130 [2020-10-26 23:14:33,759 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:14:34,076 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-26 23:14:34,077 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2068834719] [2020-10-26 23:14:34,077 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 23:14:34,077 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-26 23:14:34,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994010416] [2020-10-26 23:14:34,078 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 23:14:34,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:14:34,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 23:14:34,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-10-26 23:14:34,079 INFO L87 Difference]: Start difference. First operand 8152 states and 11382 transitions. Second operand 7 states. [2020-10-26 23:14:58,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:14:58,148 INFO L93 Difference]: Finished difference Result 22520 states and 33303 transitions. [2020-10-26 23:14:58,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-26 23:14:58,157 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 146 [2020-10-26 23:14:58,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:14:58,208 INFO L225 Difference]: With dead ends: 22520 [2020-10-26 23:14:58,208 INFO L226 Difference]: Without dead ends: 15177 [2020-10-26 23:14:58,228 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-26 23:14:58,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15177 states. [2020-10-26 23:14:58,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15177 to 15112. [2020-10-26 23:14:58,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15112 states. [2020-10-26 23:14:58,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15112 states to 15112 states and 20012 transitions. [2020-10-26 23:14:58,598 INFO L78 Accepts]: Start accepts. Automaton has 15112 states and 20012 transitions. Word has length 146 [2020-10-26 23:14:58,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:14:58,599 INFO L481 AbstractCegarLoop]: Abstraction has 15112 states and 20012 transitions. [2020-10-26 23:14:58,599 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 23:14:58,599 INFO L276 IsEmpty]: Start isEmpty. Operand 15112 states and 20012 transitions. [2020-10-26 23:14:58,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2020-10-26 23:14:58,603 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:14:58,604 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 23:14:58,604 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-26 23:14:58,604 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:14:58,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:14:58,605 INFO L82 PathProgramCache]: Analyzing trace with hash -1400399850, now seen corresponding path program 1 times [2020-10-26 23:14:58,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:14:58,606 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [500245536] [2020-10-26 23:14:58,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:14:58,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:14:58,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:14:58,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:14:59,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:15:00,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:15:00,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:15:03,427 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:15:03,428 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 251 [2020-10-26 23:15:03,428 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 23:15:03,428 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4752 [2020-10-26 23:15:03,429 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:15:03,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 23:15:03,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 23:15:03,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 226 [2020-10-26 23:15:03,430 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 23:15:03,635 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:15:03,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:15:03,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:15:03,657 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:15:03,658 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:15:03,658 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:15:03,658 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-26 23:15:03,658 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:15:03,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:15:03,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:15:03,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:15:03,662 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-26 23:15:03,715 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:15:03,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:15:03,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:15:03,953 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:15:03,953 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-26 23:15:03,954 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:15:03,954 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 210 [2020-10-26 23:15:03,954 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:15:03,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:15:03,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:15:03,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 101 [2020-10-26 23:15:03,956 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-26 23:15:04,077 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2020-10-26 23:15:04,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:15:04,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:15:04,324 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:15:04,324 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 121 [2020-10-26 23:15:04,324 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:15:04,324 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 208 [2020-10-26 23:15:04,324 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:15:04,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:15:04,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:15:04,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 121 [2020-10-26 23:15:04,325 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:15:04,609 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 19 proven. 95 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-26 23:15:04,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [500245536] [2020-10-26 23:15:04,610 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 23:15:04,610 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 23:15:04,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376228278] [2020-10-26 23:15:04,611 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 23:15:04,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:15:04,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 23:15:04,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-26 23:15:04,612 INFO L87 Difference]: Start difference. First operand 15112 states and 20012 transitions. Second operand 8 states. [2020-10-26 23:15:07,228 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2020-10-26 23:15:31,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:15:31,205 INFO L93 Difference]: Finished difference Result 33229 states and 44016 transitions. [2020-10-26 23:15:31,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-26 23:15:31,210 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 237 [2020-10-26 23:15:31,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:15:31,283 INFO L225 Difference]: With dead ends: 33229 [2020-10-26 23:15:31,283 INFO L226 Difference]: Without dead ends: 18926 [2020-10-26 23:15:31,314 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2020-10-26 23:15:31,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18926 states. [2020-10-26 23:15:31,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18926 to 18555. [2020-10-26 23:15:31,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18555 states. [2020-10-26 23:15:31,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18555 states to 18555 states and 23827 transitions. [2020-10-26 23:15:31,869 INFO L78 Accepts]: Start accepts. Automaton has 18555 states and 23827 transitions. Word has length 237 [2020-10-26 23:15:31,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:15:31,870 INFO L481 AbstractCegarLoop]: Abstraction has 18555 states and 23827 transitions. [2020-10-26 23:15:31,870 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 23:15:31,870 INFO L276 IsEmpty]: Start isEmpty. Operand 18555 states and 23827 transitions. [2020-10-26 23:15:31,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2020-10-26 23:15:31,874 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:15:31,875 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 23:15:31,875 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-26 23:15:31,875 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:15:31,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:15:31,876 INFO L82 PathProgramCache]: Analyzing trace with hash 2108668875, now seen corresponding path program 1 times [2020-10-26 23:15:31,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:15:31,876 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1066583679] [2020-10-26 23:15:31,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:15:31,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:15:31,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:15:32,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:15:32,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:15:33,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:15:33,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:15:34,844 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:15:34,844 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 253 [2020-10-26 23:15:34,844 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 23:15:34,844 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2906 [2020-10-26 23:15:34,845 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:15:34,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-26 23:15:34,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 23:15:34,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 244 [2020-10-26 23:15:34,845 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:15:35,056 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:15:35,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:15:35,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:15:35,074 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:15:35,075 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:15:35,075 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:15:35,075 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-26 23:15:35,075 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:15:35,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:15:35,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:15:35,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:15:35,076 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:15:35,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:15:35,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:15:35,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:15:35,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:15:35,557 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:15:35,557 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 130 [2020-10-26 23:15:35,558 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 23:15:35,558 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 405 [2020-10-26 23:15:35,558 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:15:35,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:15:35,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:15:35,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 130 [2020-10-26 23:15:35,559 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:15:35,832 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2020-10-26 23:15:35,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:15:35,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:15:35,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:15:36,186 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:15:36,187 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-26 23:15:36,187 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 23:15:36,187 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 334 [2020-10-26 23:15:36,187 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:15:36,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 23:15:36,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:15:36,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 94 [2020-10-26 23:15:36,188 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:15:36,568 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 32 [2020-10-26 23:15:36,852 WARN L193 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 38 [2020-10-26 23:15:37,115 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 35 [2020-10-26 23:15:37,515 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 95 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-26 23:15:37,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1066583679] [2020-10-26 23:15:37,515 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 23:15:37,515 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-26 23:15:37,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487246283] [2020-10-26 23:15:37,516 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-26 23:15:37,516 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:15:37,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-26 23:15:37,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2020-10-26 23:15:37,517 INFO L87 Difference]: Start difference. First operand 18555 states and 23827 transitions. Second operand 11 states. [2020-10-26 23:15:37,740 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2020-10-26 23:15:38,414 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2020-10-26 23:15:42,262 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 35 [2020-10-26 23:15:42,681 WARN L193 SmtUtils]: Spent 327.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 78 [2020-10-26 23:15:42,823 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 27 [2020-10-26 23:15:43,415 WARN L193 SmtUtils]: Spent 347.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 84 [2020-10-26 23:15:43,902 WARN L193 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 80 [2020-10-26 23:15:44,361 WARN L193 SmtUtils]: Spent 305.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 86 [2020-10-26 23:15:45,127 WARN L193 SmtUtils]: Spent 312.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 83 [2020-10-26 23:15:45,810 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 29 [2020-10-26 23:15:46,148 WARN L193 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 81 [2020-10-26 23:15:46,853 WARN L193 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 78 [2020-10-26 23:15:47,451 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 40