/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=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --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/Problem15_label18.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 13:03:23,711 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 13:03:23,715 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 13:03:23,784 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 13:03:23,784 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 13:03:23,793 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 13:03:23,796 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 13:03:23,801 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 13:03:23,805 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 13:03:23,815 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 13:03:23,816 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 13:03:23,819 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 13:03:23,820 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 13:03:23,823 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 13:03:23,825 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 13:03:23,828 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 13:03:23,830 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 13:03:23,834 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 13:03:23,844 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 13:03:23,849 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 13:03:23,854 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 13:03:23,868 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 13:03:23,870 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 13:03:23,874 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 13:03:23,901 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 13:03:23,903 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 13:03:23,903 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 13:03:23,906 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 13:03:23,907 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 13:03:23,908 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 13:03:23,908 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 13:03:23,909 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 13:03:23,912 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 13:03:23,913 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 13:03:23,914 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 13:03:23,914 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 13:03:23,915 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 13:03:23,916 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 13:03:23,916 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 13:03:23,917 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 13:03:23,918 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 13:03:23,919 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 [2020-10-28 13:03:23,977 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 13:03:23,977 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 13:03:23,984 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 13:03:23,984 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 13:03:23,984 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 13:03:23,985 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 13:03:23,985 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 13:03:23,985 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 13:03:23,985 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 13:03:23,985 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 13:03:23,987 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 13:03:23,987 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 13:03:23,987 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 13:03:23,988 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 13:03:23,988 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 13:03:23,988 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 13:03:23,988 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 13:03:23,989 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 13:03:23,989 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 13:03:23,989 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 13:03:23,989 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 13:03:23,989 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 13:03:23,990 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 13:03:23,990 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 13:03:23,990 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 13:03:23,990 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 13:03:23,991 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 13:03:23,991 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 13:03:23,991 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 13:03:23,991 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 13:03:24,492 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 13:03:24,524 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 13:03:24,528 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 13:03:24,529 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 13:03:24,530 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 13:03:24,532 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem15_label18.c [2020-10-28 13:03:24,628 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7442cef09/53efcd241f224e569ee1728053233bcd/FLAG70bb9ab74 [2020-10-28 13:03:25,495 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 13:03:25,500 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem15_label18.c [2020-10-28 13:03:25,533 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7442cef09/53efcd241f224e569ee1728053233bcd/FLAG70bb9ab74 [2020-10-28 13:03:25,625 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7442cef09/53efcd241f224e569ee1728053233bcd [2020-10-28 13:03:25,631 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 13:03:25,641 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 13:03:25,646 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 13:03:25,646 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 13:03:25,651 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 13:03:25,652 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 01:03:25" (1/1) ... [2020-10-28 13:03:25,659 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@36a7665a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 01:03:25, skipping insertion in model container [2020-10-28 13:03:25,659 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 01:03:25" (1/1) ... [2020-10-28 13:03:25,670 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 13:03:25,770 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 13:03:26,619 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 13:03:26,631 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 13:03:26,901 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 13:03:26,929 INFO L208 MainTranslator]: Completed translation [2020-10-28 13:03:26,931 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 01:03:26 WrapperNode [2020-10-28 13:03:26,931 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 13:03:26,934 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 13:03:26,934 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 13:03:26,934 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 13:03:26,950 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 01:03:26" (1/1) ... [2020-10-28 13:03:26,952 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 01:03:26" (1/1) ... [2020-10-28 13:03:27,022 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 01:03:26" (1/1) ... [2020-10-28 13:03:27,022 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 01:03:26" (1/1) ... [2020-10-28 13:03:27,112 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 01:03:26" (1/1) ... [2020-10-28 13:03:27,147 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 01:03:26" (1/1) ... [2020-10-28 13:03:27,171 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 01:03:26" (1/1) ... [2020-10-28 13:03:27,199 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 13:03:27,201 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 13:03:27,201 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 13:03:27,201 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 13:03:27,202 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 01:03:26" (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 [2020-10-28 13:03:27,292 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 13:03:27,293 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 13:03:27,293 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 13:03:27,293 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-28 13:03:27,293 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-28 13:03:27,294 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 13:03:27,294 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-28 13:03:27,294 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-28 13:03:27,294 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 13:03:27,294 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 13:03:27,295 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 13:03:27,295 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 13:03:27,295 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-28 13:03:27,295 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-28 13:03:27,295 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 13:03:27,296 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 13:03:27,296 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 13:03:27,296 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 13:03:27,296 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 13:03:27,296 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 13:03:27,297 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 13:03:30,981 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 13:03:30,981 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-28 13:03:30,984 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 01:03:30 BoogieIcfgContainer [2020-10-28 13:03:30,984 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 13:03:30,986 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 13:03:30,986 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 13:03:30,990 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 13:03:30,991 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 01:03:25" (1/3) ... [2020-10-28 13:03:30,992 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41e853ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 01:03:30, skipping insertion in model container [2020-10-28 13:03:30,992 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 01:03:26" (2/3) ... [2020-10-28 13:03:30,992 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41e853ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 01:03:30, skipping insertion in model container [2020-10-28 13:03:30,992 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 01:03:30" (3/3) ... [2020-10-28 13:03:30,994 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem15_label18.c [2020-10-28 13:03:31,012 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 13:03:31,019 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 13:03:31,035 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 13:03:31,071 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 13:03:31,071 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 13:03:31,072 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 13:03:31,072 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 13:03:31,072 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 13:03:31,072 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 13:03:31,072 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 13:03:31,072 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 13:03:31,100 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states. [2020-10-28 13:03:31,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-28 13:03:31,106 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 13:03:31,107 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 13:03:31,108 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 13:03:31,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 13:03:31,115 INFO L82 PathProgramCache]: Analyzing trace with hash -540594521, now seen corresponding path program 1 times [2020-10-28 13:03:31,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 13:03:31,126 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1495803484] [2020-10-28 13:03:31,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 13:03:31,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:03:31,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:03:31,894 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:03:31,894 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-28 13:03:31,894 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:03:31,895 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 544 [2020-10-28 13:03:31,897 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:03:31,898 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:03:31,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 13:03:31,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 13:03:31,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 13:03:31,898 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 13:03:32,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 13:03:32,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:03:32,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:03:32,160 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:03:32,165 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 13:03:32,166 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:03:32,166 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 66 [2020-10-28 13:03:32,166 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:03:32,166 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:03:32,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 13:03:32,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:03:32,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 13:03:32,167 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 13:03:32,199 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 13:03:32,200 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1495803484] [2020-10-28 13:03:32,203 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 13:03:32,203 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-28 13:03:32,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630315708] [2020-10-28 13:03:32,211 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 13:03:32,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 13:03:32,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 13:03:32,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 13:03:32,236 INFO L87 Difference]: Start difference. First operand 441 states. Second operand 4 states. [2020-10-28 13:03:39,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 13:03:39,041 INFO L93 Difference]: Finished difference Result 1245 states and 2226 transitions. [2020-10-28 13:03:39,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 13:03:39,044 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2020-10-28 13:03:39,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 13:03:39,073 INFO L225 Difference]: With dead ends: 1245 [2020-10-28 13:03:39,073 INFO L226 Difference]: Without dead ends: 725 [2020-10-28 13:03:39,086 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 [2020-10-28 13:03:39,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 725 states. [2020-10-28 13:03:39,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 725 to 713. [2020-10-28 13:03:39,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 713 states. [2020-10-28 13:03:39,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 713 states to 713 states and 1130 transitions. [2020-10-28 13:03:39,198 INFO L78 Accepts]: Start accepts. Automaton has 713 states and 1130 transitions. Word has length 15 [2020-10-28 13:03:39,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 13:03:39,199 INFO L481 AbstractCegarLoop]: Abstraction has 713 states and 1130 transitions. [2020-10-28 13:03:39,199 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 13:03:39,199 INFO L276 IsEmpty]: Start isEmpty. Operand 713 states and 1130 transitions. [2020-10-28 13:03:39,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-28 13:03:39,204 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 13:03:39,204 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-28 13:03:39,205 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 13:03:39,205 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 13:03:39,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 13:03:39,206 INFO L82 PathProgramCache]: Analyzing trace with hash -839517005, now seen corresponding path program 1 times [2020-10-28 13:03:39,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 13:03:39,206 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1784664113] [2020-10-28 13:03:39,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 13:03:39,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:03:39,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:03:39,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:03:41,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:03:41,242 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:03:41,242 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 99 [2020-10-28 13:03:41,243 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 13:03:41,243 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1979 [2020-10-28 13:03:41,244 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:03:41,244 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:03:41,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 13:03:41,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 13:03:41,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-28 13:03:41,246 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-28 13:03:41,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 13:03:41,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:03:41,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:03:41,426 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:03:41,426 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 13:03:41,427 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:03:41,427 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-28 13:03:41,428 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:03:41,429 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:03:41,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 13:03:41,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:03:41,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 13:03:41,438 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 10 [2020-10-28 13:03:41,465 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 13:03:41,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:03:41,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:03:41,767 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:03:41,768 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-28 13:03:41,768 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:03:41,768 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 272 [2020-10-28 13:03:41,768 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:03:41,769 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:03:41,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 13:03:41,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 13:03:41,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 73 [2020-10-28 13:03:41,769 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 13:03:41,882 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 13:03:41,883 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1784664113] [2020-10-28 13:03:41,883 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 13:03:41,884 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 13:03:41,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676735872] [2020-10-28 13:03:41,886 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 13:03:41,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 13:03:41,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 13:03:41,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 13:03:41,894 INFO L87 Difference]: Start difference. First operand 713 states and 1130 transitions. Second operand 7 states. [2020-10-28 13:03:51,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 13:03:51,660 INFO L93 Difference]: Finished difference Result 2110 states and 3379 transitions. [2020-10-28 13:03:51,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 13:03:51,661 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 87 [2020-10-28 13:03:51,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 13:03:51,681 INFO L225 Difference]: With dead ends: 2110 [2020-10-28 13:03:51,681 INFO L226 Difference]: Without dead ends: 1403 [2020-10-28 13:03:51,686 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-28 13:03:51,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1403 states. [2020-10-28 13:03:51,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1403 to 1356. [2020-10-28 13:03:51,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1356 states. [2020-10-28 13:03:51,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1356 states to 1356 states and 1875 transitions. [2020-10-28 13:03:51,816 INFO L78 Accepts]: Start accepts. Automaton has 1356 states and 1875 transitions. Word has length 87 [2020-10-28 13:03:51,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 13:03:51,818 INFO L481 AbstractCegarLoop]: Abstraction has 1356 states and 1875 transitions. [2020-10-28 13:03:51,818 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 13:03:51,818 INFO L276 IsEmpty]: Start isEmpty. Operand 1356 states and 1875 transitions. [2020-10-28 13:03:51,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-10-28 13:03:51,825 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 13:03:51,825 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-28 13:03:51,825 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 13:03:51,826 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 13:03:51,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 13:03:51,827 INFO L82 PathProgramCache]: Analyzing trace with hash 1154722627, now seen corresponding path program 1 times [2020-10-28 13:03:51,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 13:03:51,828 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1453223650] [2020-10-28 13:03:51,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 13:03:51,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:03:51,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:03:52,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:03:53,382 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:03:53,382 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 107 [2020-10-28 13:03:53,383 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 13:03:53,383 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1483 [2020-10-28 13:03:53,383 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:03:53,383 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:03:53,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 13:03:53,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 13:03:53,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 86 [2020-10-28 13:03:53,384 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 13:03:53,579 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-10-28 13:03:53,580 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 13:03:53,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:03:53,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:03:53,612 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:03:53,612 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 13:03:53,612 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:03:53,613 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-28 13:03:53,613 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:03:53,613 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:03:53,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 13:03:53,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:03:53,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 13:03:53,614 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 13:03:53,665 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 13:03:53,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:03:53,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:03:53,878 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:03:53,878 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-28 13:03:53,879 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:03:53,879 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 190 [2020-10-28 13:03:53,879 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:03:53,879 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:03:53,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 13:03:53,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 13:03:53,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-28 13:03:53,880 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 13:03:54,160 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 13:03:54,161 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1453223650] [2020-10-28 13:03:54,161 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 13:03:54,161 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-28 13:03:54,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026317721] [2020-10-28 13:03:54,164 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 13:03:54,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 13:03:54,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 13:03:54,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-28 13:03:54,168 INFO L87 Difference]: Start difference. First operand 1356 states and 1875 transitions. Second operand 8 states. [2020-10-28 13:04:04,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 13:04:04,099 INFO L93 Difference]: Finished difference Result 3126 states and 4417 transitions. [2020-10-28 13:04:04,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 13:04:04,102 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 95 [2020-10-28 13:04:04,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 13:04:04,124 INFO L225 Difference]: With dead ends: 3126 [2020-10-28 13:04:04,124 INFO L226 Difference]: Without dead ends: 1776 [2020-10-28 13:04:04,129 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2020-10-28 13:04:04,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1776 states. [2020-10-28 13:04:04,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1776 to 1667. [2020-10-28 13:04:04,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1667 states. [2020-10-28 13:04:04,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1667 states to 1667 states and 2197 transitions. [2020-10-28 13:04:04,235 INFO L78 Accepts]: Start accepts. Automaton has 1667 states and 2197 transitions. Word has length 95 [2020-10-28 13:04:04,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 13:04:04,236 INFO L481 AbstractCegarLoop]: Abstraction has 1667 states and 2197 transitions. [2020-10-28 13:04:04,236 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 13:04:04,236 INFO L276 IsEmpty]: Start isEmpty. Operand 1667 states and 2197 transitions. [2020-10-28 13:04:04,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2020-10-28 13:04:04,240 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 13:04:04,241 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 13:04:04,241 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 13:04:04,241 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 13:04:04,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 13:04:04,242 INFO L82 PathProgramCache]: Analyzing trace with hash -1723249681, now seen corresponding path program 1 times [2020-10-28 13:04:04,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 13:04:04,242 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1808954911] [2020-10-28 13:04:04,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 13:04:04,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:04:04,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:04:04,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:04:04,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:04:05,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:04:08,252 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:04:08,253 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 204 [2020-10-28 13:04:08,253 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 13:04:08,253 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3952 [2020-10-28 13:04:08,253 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:04:08,253 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:04:08,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 13:04:08,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 105 [2020-10-28 13:04:08,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 83 [2020-10-28 13:04:08,254 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:04:08,378 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 13:04:08,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:04:08,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:04:08,386 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:04:08,386 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 13:04:08,387 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:04:08,387 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 13:04:08,387 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:04:08,387 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:04:08,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 13:04:08,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:04:08,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 13:04:08,388 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:04:08,407 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 13:04:08,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:04:08,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:04:08,521 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:04:08,522 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-28 13:04:08,522 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:04:08,522 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 88 [2020-10-28 13:04:08,522 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:04:08,523 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:04:08,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 13:04:08,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:04:08,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 90 [2020-10-28 13:04:08,528 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-28 13:04:08,576 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2020-10-28 13:04:08,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:04:08,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:04:08,747 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:04:08,747 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-28 13:04:08,747 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:04:08,747 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 145 [2020-10-28 13:04:08,748 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:04:08,748 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:04:08,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 13:04:08,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 13:04:08,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-28 13:04:08,749 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:04:08,884 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 91 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 13:04:08,885 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1808954911] [2020-10-28 13:04:08,885 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 13:04:08,885 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 13:04:08,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190818181] [2020-10-28 13:04:08,887 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 13:04:08,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 13:04:08,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 13:04:08,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 13:04:08,888 INFO L87 Difference]: Start difference. First operand 1667 states and 2197 transitions. Second operand 7 states. [2020-10-28 13:04:21,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 13:04:21,702 INFO L93 Difference]: Finished difference Result 4967 states and 6705 transitions. [2020-10-28 13:04:21,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 13:04:21,703 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 190 [2020-10-28 13:04:21,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 13:04:21,726 INFO L225 Difference]: With dead ends: 4967 [2020-10-28 13:04:21,727 INFO L226 Difference]: Without dead ends: 3291 [2020-10-28 13:04:21,733 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-28 13:04:21,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3291 states. [2020-10-28 13:04:21,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3291 to 3265. [2020-10-28 13:04:21,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3265 states. [2020-10-28 13:04:21,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3265 states to 3265 states and 3884 transitions. [2020-10-28 13:04:21,851 INFO L78 Accepts]: Start accepts. Automaton has 3265 states and 3884 transitions. Word has length 190 [2020-10-28 13:04:21,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 13:04:21,852 INFO L481 AbstractCegarLoop]: Abstraction has 3265 states and 3884 transitions. [2020-10-28 13:04:21,852 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 13:04:21,852 INFO L276 IsEmpty]: Start isEmpty. Operand 3265 states and 3884 transitions. [2020-10-28 13:04:21,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2020-10-28 13:04:21,859 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 13:04:21,859 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 13:04:21,859 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 13:04:21,860 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 13:04:21,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 13:04:21,860 INFO L82 PathProgramCache]: Analyzing trace with hash 142311452, now seen corresponding path program 1 times [2020-10-28 13:04:21,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 13:04:21,861 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2135408190] [2020-10-28 13:04:21,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 13:04:21,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:04:22,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:04:22,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:04:22,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:04:24,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:04:25,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:04:26,996 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:04:26,997 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 346 [2020-10-28 13:04:26,997 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 13:04:26,997 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-28 13:04:26,997 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:04:26,998 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:04:26,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 13:04:26,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 247 [2020-10-28 13:04:26,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 83 [2020-10-28 13:04:26,998 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 13:04:27,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 13:04:27,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:04:27,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:04:27,171 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:04:27,172 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 13:04:27,172 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:04:27,172 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 13:04:27,172 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:04:27,172 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:04:27,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 13:04:27,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:04:27,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 13:04:27,175 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-28 13:04:27,196 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 13:04:27,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:04:27,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:04:27,528 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:04:27,529 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 238 [2020-10-28 13:04:27,529 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:04:27,529 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 266 [2020-10-28 13:04:27,531 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:04:27,534 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:04:27,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 13:04:27,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:04:27,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 232 [2020-10-28 13:04:27,534 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 13:04:27,656 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 245 [2020-10-28 13:04:27,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:04:27,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:04:27,884 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:04:27,885 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-28 13:04:27,885 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:04:27,885 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 209 [2020-10-28 13:04:27,885 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:04:27,885 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:04:27,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 13:04:27,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 13:04:27,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-28 13:04:27,886 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 13:04:28,063 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 91 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 13:04:28,063 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2135408190] [2020-10-28 13:04:28,064 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 13:04:28,064 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 13:04:28,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725601418] [2020-10-28 13:04:28,065 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 13:04:28,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 13:04:28,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 13:04:28,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 13:04:28,066 INFO L87 Difference]: Start difference. First operand 3265 states and 3884 transitions. Second operand 7 states. [2020-10-28 13:04:30,184 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-28 13:04:39,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 13:04:39,756 INFO L93 Difference]: Finished difference Result 7913 states and 9762 transitions. [2020-10-28 13:04:39,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 13:04:39,758 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 332 [2020-10-28 13:04:39,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 13:04:39,785 INFO L225 Difference]: With dead ends: 7913 [2020-10-28 13:04:39,785 INFO L226 Difference]: Without dead ends: 5248 [2020-10-28 13:04:39,794 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-28 13:04:39,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5248 states. [2020-10-28 13:04:39,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5248 to 4874. [2020-10-28 13:04:39,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4874 states. [2020-10-28 13:04:39,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4874 states to 4874 states and 5653 transitions. [2020-10-28 13:04:39,955 INFO L78 Accepts]: Start accepts. Automaton has 4874 states and 5653 transitions. Word has length 332 [2020-10-28 13:04:39,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 13:04:39,956 INFO L481 AbstractCegarLoop]: Abstraction has 4874 states and 5653 transitions. [2020-10-28 13:04:39,956 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 13:04:39,956 INFO L276 IsEmpty]: Start isEmpty. Operand 4874 states and 5653 transitions. [2020-10-28 13:04:39,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 370 [2020-10-28 13:04:39,964 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 13:04:39,965 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 13:04:39,965 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 13:04:39,965 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 13:04:39,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 13:04:39,966 INFO L82 PathProgramCache]: Analyzing trace with hash -299451945, now seen corresponding path program 1 times [2020-10-28 13:04:39,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 13:04:39,966 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2022875265] [2020-10-28 13:04:39,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 13:04:40,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:04:40,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:04:40,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:04:43,297 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:04:43,298 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 383 [2020-10-28 13:04:43,298 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 13:04:43,298 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3210 [2020-10-28 13:04:43,298 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:04:43,298 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:04:43,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 13:04:43,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 284 [2020-10-28 13:04:43,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 83 [2020-10-28 13:04:43,299 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:04:43,477 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 13:04:43,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:04:43,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:04:43,493 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:04:43,494 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 13:04:43,494 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:04:43,494 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-28 13:04:43,494 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:04:43,495 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:04:43,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 13:04:43,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:04:43,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 13:04:43,496 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 13:04:43,525 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 13:04:43,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:04:43,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:04:44,035 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:04:44,035 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 275 [2020-10-28 13:04:44,036 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:04:44,036 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 418 [2020-10-28 13:04:44,036 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:04:44,036 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:04:44,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 13:04:44,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:04:44,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 269 [2020-10-28 13:04:44,038 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 13:04:44,295 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 282 [2020-10-28 13:04:44,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:04:44,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:04:44,450 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:04:44,450 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-28 13:04:44,450 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:04:44,450 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 133 [2020-10-28 13:04:44,451 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:04:44,451 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:04:44,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 13:04:44,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 13:04:44,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-28 13:04:44,452 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 13:04:44,670 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 91 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 13:04:44,671 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2022875265] [2020-10-28 13:04:44,671 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 13:04:44,671 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 13:04:44,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46863907] [2020-10-28 13:04:44,672 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 13:04:44,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 13:04:44,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 13:04:44,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 13:04:44,674 INFO L87 Difference]: Start difference. First operand 4874 states and 5653 transitions. Second operand 7 states. [2020-10-28 13:04:56,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 13:04:56,854 INFO L93 Difference]: Finished difference Result 11693 states and 13988 transitions. [2020-10-28 13:04:56,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 13:04:56,857 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 369 [2020-10-28 13:04:56,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 13:04:56,893 INFO L225 Difference]: With dead ends: 11693 [2020-10-28 13:04:56,894 INFO L226 Difference]: Without dead ends: 6823 [2020-10-28 13:04:56,906 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-28 13:04:56,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6823 states. [2020-10-28 13:04:57,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6823 to 6157. [2020-10-28 13:04:57,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6157 states. [2020-10-28 13:04:57,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6157 states to 6157 states and 7206 transitions. [2020-10-28 13:04:57,108 INFO L78 Accepts]: Start accepts. Automaton has 6157 states and 7206 transitions. Word has length 369 [2020-10-28 13:04:57,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 13:04:57,109 INFO L481 AbstractCegarLoop]: Abstraction has 6157 states and 7206 transitions. [2020-10-28 13:04:57,109 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 13:04:57,109 INFO L276 IsEmpty]: Start isEmpty. Operand 6157 states and 7206 transitions. [2020-10-28 13:04:57,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 401 [2020-10-28 13:04:57,117 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 13:04:57,118 INFO L422 BasicCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 13:04:57,118 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 13:04:57,119 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 13:04:57,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 13:04:57,119 INFO L82 PathProgramCache]: Analyzing trace with hash 449749190, now seen corresponding path program 1 times [2020-10-28 13:04:57,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 13:04:57,120 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [588370603] [2020-10-28 13:04:57,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 13:04:57,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:04:57,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:04:57,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:05:00,215 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:05:00,216 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 414 [2020-10-28 13:05:00,216 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 13:05:00,216 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2964 [2020-10-28 13:05:00,217 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:05:00,217 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:05:00,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 13:05:00,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 284 [2020-10-28 13:05:00,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 114 [2020-10-28 13:05:00,218 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 13:05:00,444 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 13:05:00,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:05:00,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:05:00,456 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:05:00,456 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 13:05:00,456 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:05:00,456 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 13:05:00,457 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:05:00,457 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:05:00,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 13:05:00,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:05:00,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 13:05:00,458 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 13:05:00,490 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 13:05:00,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:05:00,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:05:00,943 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:05:00,943 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 275 [2020-10-28 13:05:00,944 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:05:00,944 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 362 [2020-10-28 13:05:00,944 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:05:00,945 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:05:00,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 13:05:00,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:05:00,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 269 [2020-10-28 13:05:00,946 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-28 13:05:01,225 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 282 [2020-10-28 13:05:01,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:05:01,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:05:01,461 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:05:01,462 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-28 13:05:01,462 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:05:01,462 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 205 [2020-10-28 13:05:01,462 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:05:01,462 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:05:01,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 13:05:01,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 13:05:01,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 112 [2020-10-28 13:05:01,463 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 13:05:02,355 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 122 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 13:05:02,356 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [588370603] [2020-10-28 13:05:02,356 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 13:05:02,356 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 13:05:02,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788107630] [2020-10-28 13:05:02,358 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 13:05:02,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 13:05:02,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 13:05:02,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-28 13:05:02,361 INFO L87 Difference]: Start difference. First operand 6157 states and 7206 transitions. Second operand 8 states. [2020-10-28 13:05:12,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 13:05:12,159 INFO L93 Difference]: Finished difference Result 12986 states and 15262 transitions. [2020-10-28 13:05:12,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 13:05:12,161 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 400 [2020-10-28 13:05:12,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 13:05:12,196 INFO L225 Difference]: With dead ends: 12986 [2020-10-28 13:05:12,196 INFO L226 Difference]: Without dead ends: 7142 [2020-10-28 13:05:12,212 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2020-10-28 13:05:12,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7142 states. [2020-10-28 13:05:12,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7142 to 7115. [2020-10-28 13:05:12,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7115 states. [2020-10-28 13:05:12,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7115 states to 7115 states and 8241 transitions. [2020-10-28 13:05:12,423 INFO L78 Accepts]: Start accepts. Automaton has 7115 states and 8241 transitions. Word has length 400 [2020-10-28 13:05:12,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 13:05:12,425 INFO L481 AbstractCegarLoop]: Abstraction has 7115 states and 8241 transitions. [2020-10-28 13:05:12,425 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 13:05:12,425 INFO L276 IsEmpty]: Start isEmpty. Operand 7115 states and 8241 transitions. [2020-10-28 13:05:12,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 413 [2020-10-28 13:05:12,433 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 13:05:12,434 INFO L422 BasicCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 13:05:12,434 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 13:05:12,435 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 13:05:12,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 13:05:12,435 INFO L82 PathProgramCache]: Analyzing trace with hash 231513550, now seen corresponding path program 1 times [2020-10-28 13:05:12,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 13:05:12,436 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [672040905] [2020-10-28 13:05:12,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 13:05:12,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:05:12,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:05:13,366 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:05:13,366 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 426 [2020-10-28 13:05:13,367 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:05:13,367 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 821 [2020-10-28 13:05:13,367 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:05:13,367 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:05:13,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 13:05:13,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 409 [2020-10-28 13:05:13,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-28 13:05:13,368 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 13:05:13,557 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 13:05:13,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:05:13,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:05:13,566 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:05:13,566 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 13:05:13,566 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:05:13,566 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 13:05:13,566 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:05:13,567 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:05:13,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 13:05:13,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:05:13,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 13:05:13,567 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:05:13,601 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 13:05:13,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:05:13,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:05:13,772 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:05:13,772 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 287 [2020-10-28 13:05:13,773 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:05:13,773 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 143 [2020-10-28 13:05:13,773 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:05:13,774 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:05:13,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 13:05:13,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:05:13,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 13:05:13,775 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 13:05:13,961 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 294 [2020-10-28 13:05:14,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:05:14,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:05:14,142 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:05:14,142 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-28 13:05:14,143 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:05:14,143 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 132 [2020-10-28 13:05:14,144 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:05:14,145 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:05:14,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 13:05:14,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:05:14,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 106 [2020-10-28 13:05:14,145 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-28 13:05:14,386 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 15 proven. 2 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2020-10-28 13:05:14,386 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [672040905] [2020-10-28 13:05:14,387 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 13:05:14,387 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 13:05:14,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312444254] [2020-10-28 13:05:14,388 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 13:05:14,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 13:05:14,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 13:05:14,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 13:05:14,389 INFO L87 Difference]: Start difference. First operand 7115 states and 8241 transitions. Second operand 5 states. [2020-10-28 13:05:16,371 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2020-10-28 13:05:23,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 13:05:23,727 INFO L93 Difference]: Finished difference Result 16245 states and 19438 transitions. [2020-10-28 13:05:23,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 13:05:23,735 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 412 [2020-10-28 13:05:23,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 13:05:23,791 INFO L225 Difference]: With dead ends: 16245 [2020-10-28 13:05:23,792 INFO L226 Difference]: Without dead ends: 10364 [2020-10-28 13:05:23,807 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-28 13:05:23,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10364 states. [2020-10-28 13:05:24,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10364 to 10342. [2020-10-28 13:05:24,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10342 states. [2020-10-28 13:05:24,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10342 states to 10342 states and 12235 transitions. [2020-10-28 13:05:24,080 INFO L78 Accepts]: Start accepts. Automaton has 10342 states and 12235 transitions. Word has length 412 [2020-10-28 13:05:24,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 13:05:24,082 INFO L481 AbstractCegarLoop]: Abstraction has 10342 states and 12235 transitions. [2020-10-28 13:05:24,082 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 13:05:24,082 INFO L276 IsEmpty]: Start isEmpty. Operand 10342 states and 12235 transitions. [2020-10-28 13:05:24,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 453 [2020-10-28 13:05:24,095 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 13:05:24,096 INFO L422 BasicCegarLoop]: trace histogram [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, 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, 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, 1] [2020-10-28 13:05:24,096 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 13:05:24,096 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 13:05:24,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 13:05:24,098 INFO L82 PathProgramCache]: Analyzing trace with hash 2086273483, now seen corresponding path program 1 times [2020-10-28 13:05:24,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 13:05:24,099 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1684739667] [2020-10-28 13:05:24,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 13:05:24,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:05:24,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:05:24,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:05:24,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:05:25,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:05:29,316 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:05:29,317 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 466 [2020-10-28 13:05:29,317 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 13:05:29,317 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5064 [2020-10-28 13:05:29,317 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:05:29,317 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:05:29,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 13:05:29,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 247 [2020-10-28 13:05:29,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 203 [2020-10-28 13:05:29,319 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 13:05:29,577 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-10-28 13:05:29,578 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 13:05:29,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:05:29,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:05:29,585 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:05:29,585 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 13:05:29,586 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:05:29,586 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 13:05:29,586 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:05:29,586 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:05:29,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 13:05:29,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:05:29,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 13:05:29,587 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:05:29,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 13:05:29,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:05:29,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:05:29,913 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:05:29,914 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 238 [2020-10-28 13:05:29,914 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:05:29,914 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 238 [2020-10-28 13:05:29,914 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:05:29,914 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:05:29,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 13:05:29,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:05:29,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 232 [2020-10-28 13:05:29,915 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:05:30,014 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 245 [2020-10-28 13:05:30,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:05:30,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:05:30,368 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:05:30,368 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 201 [2020-10-28 13:05:30,369 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:05:30,369 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 303 [2020-10-28 13:05:30,369 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:05:30,369 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:05:30,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 13:05:30,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 13:05:30,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 201 [2020-10-28 13:05:30,369 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:05:30,762 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 211 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 13:05:30,763 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1684739667] [2020-10-28 13:05:30,763 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 13:05:30,763 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 13:05:30,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883702772] [2020-10-28 13:05:30,766 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 13:05:30,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 13:05:30,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 13:05:30,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 13:05:30,769 INFO L87 Difference]: Start difference. First operand 10342 states and 12235 transitions. Second operand 7 states. [2020-10-28 13:05:34,485 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-10-28 13:05:42,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 13:05:42,666 INFO L93 Difference]: Finished difference Result 20770 states and 24693 transitions. [2020-10-28 13:05:42,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 13:05:42,668 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 452 [2020-10-28 13:05:42,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 13:05:42,710 INFO L225 Difference]: With dead ends: 20770 [2020-10-28 13:05:42,710 INFO L226 Difference]: Without dead ends: 11343 [2020-10-28 13:05:42,736 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-10-28 13:05:42,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11343 states. [2020-10-28 13:05:42,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11343 to 11303. [2020-10-28 13:05:42,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11303 states. [2020-10-28 13:05:43,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11303 states to 11303 states and 13287 transitions. [2020-10-28 13:05:43,113 INFO L78 Accepts]: Start accepts. Automaton has 11303 states and 13287 transitions. Word has length 452 [2020-10-28 13:05:43,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 13:05:43,114 INFO L481 AbstractCegarLoop]: Abstraction has 11303 states and 13287 transitions. [2020-10-28 13:05:43,114 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 13:05:43,114 INFO L276 IsEmpty]: Start isEmpty. Operand 11303 states and 13287 transitions. [2020-10-28 13:05:43,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 486 [2020-10-28 13:05:43,120 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 13:05:43,120 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 13:05:43,121 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 13:05:43,121 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 13:05:43,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 13:05:43,122 INFO L82 PathProgramCache]: Analyzing trace with hash -145800846, now seen corresponding path program 1 times [2020-10-28 13:05:43,122 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 13:05:43,122 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1391019995] [2020-10-28 13:05:43,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 13:05:43,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:05:43,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:05:43,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:05:44,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:05:45,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:05:46,964 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:05:46,964 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 501 [2020-10-28 13:05:46,964 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 13:05:46,965 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3674 [2020-10-28 13:05:46,965 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:05:46,965 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:05:46,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 13:05:46,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 482 [2020-10-28 13:05:46,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 13:05:46,965 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:05:47,119 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 13:05:47,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:05:47,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:05:47,126 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:05:47,126 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 13:05:47,126 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:05:47,126 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 13:05:47,126 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:05:47,127 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:05:47,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 13:05:47,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:05:47,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 13:05:47,127 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:05:47,149 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 13:05:47,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:05:47,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:05:47,269 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:05:47,269 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 287 [2020-10-28 13:05:47,269 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:05:47,269 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 99 [2020-10-28 13:05:47,270 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:05:47,270 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:05:47,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 13:05:47,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:05:47,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 13:05:47,270 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:05:47,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 294 [2020-10-28 13:05:47,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:05:47,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:05:47,460 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:05:47,460 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-28 13:05:47,460 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:05:47,460 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 38 [2020-10-28 13:05:47,460 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:05:47,461 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:05:47,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 13:05:47,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:05:47,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 13:05:47,461 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:05:47,494 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 405 [2020-10-28 13:05:47,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:05:47,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:05:47,565 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:05:47,566 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-28 13:05:47,566 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:05:47,566 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 55 [2020-10-28 13:05:47,566 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:05:47,566 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:05:47,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 13:05:47,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 66 [2020-10-28 13:05:47,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 13:05:47,567 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:05:47,752 INFO L134 CoverageAnalysis]: Checked inductivity of 274 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2020-10-28 13:05:47,752 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1391019995] [2020-10-28 13:05:47,752 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 13:05:47,753 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 13:05:47,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818339373] [2020-10-28 13:05:47,753 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 13:05:47,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 13:05:47,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 13:05:47,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 13:05:47,755 INFO L87 Difference]: Start difference. First operand 11303 states and 13287 transitions. Second operand 5 states. [2020-10-28 13:05:59,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 13:05:59,233 INFO L93 Difference]: Finished difference Result 25716 states and 31134 transitions. [2020-10-28 13:05:59,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 13:05:59,236 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 485 [2020-10-28 13:05:59,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 13:05:59,298 INFO L225 Difference]: With dead ends: 25716 [2020-10-28 13:05:59,298 INFO L226 Difference]: Without dead ends: 15647 [2020-10-28 13:05:59,326 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-28 13:05:59,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15647 states. [2020-10-28 13:05:59,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15647 to 13472. [2020-10-28 13:05:59,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13472 states. [2020-10-28 13:05:59,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13472 states to 13472 states and 16110 transitions. [2020-10-28 13:05:59,659 INFO L78 Accepts]: Start accepts. Automaton has 13472 states and 16110 transitions. Word has length 485 [2020-10-28 13:05:59,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 13:05:59,660 INFO L481 AbstractCegarLoop]: Abstraction has 13472 states and 16110 transitions. [2020-10-28 13:05:59,660 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 13:05:59,660 INFO L276 IsEmpty]: Start isEmpty. Operand 13472 states and 16110 transitions. [2020-10-28 13:05:59,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 489 [2020-10-28 13:05:59,665 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 13:05:59,666 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 13:05:59,667 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 13:05:59,667 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 13:05:59,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 13:05:59,667 INFO L82 PathProgramCache]: Analyzing trace with hash -191186782, now seen corresponding path program 1 times [2020-10-28 13:05:59,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 13:05:59,668 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2133136604] [2020-10-28 13:05:59,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 13:05:59,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:05:59,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:06:00,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:06:02,981 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:06:02,982 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 504 [2020-10-28 13:06:02,982 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 13:06:02,982 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3183 [2020-10-28 13:06:02,982 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:06:02,982 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:06:02,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 13:06:02,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 409 [2020-10-28 13:06:02,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 79 [2020-10-28 13:06:02,983 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:06:03,139 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 13:06:03,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:06:03,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:06:03,147 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:06:03,147 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 13:06:03,147 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:06:03,147 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 13:06:03,148 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:06:03,148 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:06:03,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 13:06:03,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:06:03,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 13:06:03,148 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:06:03,173 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 13:06:03,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:06:03,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:06:03,269 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:06:03,269 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 287 [2020-10-28 13:06:03,269 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:06:03,269 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 78 [2020-10-28 13:06:03,269 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:06:03,270 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:06:03,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 13:06:03,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:06:03,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 13:06:03,270 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:06:03,383 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 294 [2020-10-28 13:06:03,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:06:03,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:06:03,512 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:06:03,512 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-28 13:06:03,512 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:06:03,512 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 110 [2020-10-28 13:06:03,513 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:06:03,513 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:06:03,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 13:06:03,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:06:03,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 106 [2020-10-28 13:06:03,513 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:06:03,636 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 405 [2020-10-28 13:06:03,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:06:03,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:06:03,740 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:06:03,741 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-28 13:06:03,741 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:06:03,741 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 82 [2020-10-28 13:06:03,741 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:06:03,741 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:06:03,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 13:06:03,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 13:06:03,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-10-28 13:06:03,742 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:06:03,913 INFO L134 CoverageAnalysis]: Checked inductivity of 284 backedges. 172 proven. 2 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2020-10-28 13:06:03,914 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2133136604] [2020-10-28 13:06:03,914 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 13:06:03,914 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 13:06:03,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951624084] [2020-10-28 13:06:03,915 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 13:06:03,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 13:06:03,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 13:06:03,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 13:06:03,916 INFO L87 Difference]: Start difference. First operand 13472 states and 16110 transitions. Second operand 7 states. [2020-10-28 13:06:13,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 13:06:13,705 INFO L93 Difference]: Finished difference Result 31311 states and 38308 transitions. [2020-10-28 13:06:13,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 13:06:13,707 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 488 [2020-10-28 13:06:13,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 13:06:13,777 INFO L225 Difference]: With dead ends: 31311 [2020-10-28 13:06:13,778 INFO L226 Difference]: Without dead ends: 18152 [2020-10-28 13:06:13,810 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-10-28 13:06:13,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18152 states. [2020-10-28 13:06:14,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18152 to 16878. [2020-10-28 13:06:14,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16878 states. [2020-10-28 13:06:14,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16878 states to 16878 states and 20623 transitions. [2020-10-28 13:06:14,231 INFO L78 Accepts]: Start accepts. Automaton has 16878 states and 20623 transitions. Word has length 488 [2020-10-28 13:06:14,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 13:06:14,232 INFO L481 AbstractCegarLoop]: Abstraction has 16878 states and 20623 transitions. [2020-10-28 13:06:14,232 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 13:06:14,233 INFO L276 IsEmpty]: Start isEmpty. Operand 16878 states and 20623 transitions. [2020-10-28 13:06:14,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 495 [2020-10-28 13:06:14,239 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 13:06:14,240 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 13:06:14,240 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 13:06:14,240 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 13:06:14,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 13:06:14,241 INFO L82 PathProgramCache]: Analyzing trace with hash 952489550, now seen corresponding path program 1 times [2020-10-28 13:06:14,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 13:06:14,241 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1054919926] [2020-10-28 13:06:14,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 13:06:14,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:06:14,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:06:15,304 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:06:15,304 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 510 [2020-10-28 13:06:15,304 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:06:15,304 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 919 [2020-10-28 13:06:15,304 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:06:15,304 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:06:15,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 13:06:15,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 409 [2020-10-28 13:06:15,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 85 [2020-10-28 13:06:15,305 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:06:15,511 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 13:06:15,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:06:15,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:06:15,519 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:06:15,519 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 13:06:15,519 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:06:15,519 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 13:06:15,519 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:06:15,520 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:06:15,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 13:06:15,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:06:15,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 13:06:15,520 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:06:15,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 13:06:15,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:06:15,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:06:15,639 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:06:15,640 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 287 [2020-10-28 13:06:15,640 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:06:15,640 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 82 [2020-10-28 13:06:15,640 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:06:15,640 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:06:15,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 13:06:15,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:06:15,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 13:06:15,641 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:06:15,737 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 294 [2020-10-28 13:06:15,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:06:15,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:06:15,830 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:06:15,830 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-28 13:06:15,830 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:06:15,831 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 73 [2020-10-28 13:06:15,831 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:06:15,831 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:06:15,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 13:06:15,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:06:15,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 106 [2020-10-28 13:06:15,831 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:06:15,868 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 405 [2020-10-28 13:06:15,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:06:15,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:06:16,009 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:06:16,010 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-28 13:06:16,010 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:06:16,010 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 128 [2020-10-28 13:06:16,010 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:06:16,011 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:06:16,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 13:06:16,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 13:06:16,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 83 [2020-10-28 13:06:16,011 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:06:16,324 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 184 proven. 2 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2020-10-28 13:06:16,324 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1054919926] [2020-10-28 13:06:16,324 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 13:06:16,325 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 13:06:16,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321672930] [2020-10-28 13:06:16,326 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 13:06:16,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 13:06:16,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 13:06:16,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-28 13:06:16,327 INFO L87 Difference]: Start difference. First operand 16878 states and 20623 transitions. Second operand 8 states. [2020-10-28 13:06:19,569 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2020-10-28 13:06:28,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 13:06:28,197 INFO L93 Difference]: Finished difference Result 33201 states and 40745 transitions. [2020-10-28 13:06:28,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 13:06:28,200 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 494 [2020-10-28 13:06:28,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 13:06:28,264 INFO L225 Difference]: With dead ends: 33201 [2020-10-28 13:06:28,264 INFO L226 Difference]: Without dead ends: 16636 [2020-10-28 13:06:28,293 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2020-10-28 13:06:28,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16636 states. [2020-10-28 13:06:28,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16636 to 16602. [2020-10-28 13:06:28,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16602 states. [2020-10-28 13:06:28,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16602 states to 16602 states and 19426 transitions. [2020-10-28 13:06:28,708 INFO L78 Accepts]: Start accepts. Automaton has 16602 states and 19426 transitions. Word has length 494 [2020-10-28 13:06:28,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 13:06:28,709 INFO L481 AbstractCegarLoop]: Abstraction has 16602 states and 19426 transitions. [2020-10-28 13:06:28,709 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 13:06:28,709 INFO L276 IsEmpty]: Start isEmpty. Operand 16602 states and 19426 transitions. [2020-10-28 13:06:28,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 507 [2020-10-28 13:06:28,715 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 13:06:28,716 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 13:06:28,716 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 13:06:28,717 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 13:06:28,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 13:06:28,718 INFO L82 PathProgramCache]: Analyzing trace with hash -452822675, now seen corresponding path program 1 times [2020-10-28 13:06:28,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 13:06:28,718 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1819934415] [2020-10-28 13:06:28,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 13:06:28,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:06:28,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:06:29,655 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:06:29,655 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 522 [2020-10-28 13:06:29,655 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:06:29,655 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 773 [2020-10-28 13:06:29,655 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:06:29,656 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:06:29,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 13:06:29,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 409 [2020-10-28 13:06:29,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 97 [2020-10-28 13:06:29,656 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:06:29,868 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-10-28 13:06:29,869 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 13:06:29,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:06:29,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:06:29,888 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:06:29,888 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 13:06:29,888 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:06:29,888 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-28 13:06:29,889 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:06:29,889 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:06:29,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 13:06:29,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:06:29,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 13:06:29,889 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:06:29,962 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 13:06:29,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:06:29,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:06:30,186 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:06:30,187 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 287 [2020-10-28 13:06:30,187 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:06:30,187 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 203 [2020-10-28 13:06:30,187 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:06:30,187 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:06:30,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 13:06:30,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:06:30,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 13:06:30,188 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:06:30,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 294 [2020-10-28 13:06:30,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:06:30,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:06:30,358 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:06:30,358 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-28 13:06:30,359 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:06:30,359 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 75 [2020-10-28 13:06:30,359 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:06:30,359 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:06:30,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 13:06:30,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:06:30,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 106 [2020-10-28 13:06:30,359 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:06:30,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 405 [2020-10-28 13:06:30,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:06:30,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:06:30,488 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:06:30,489 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-28 13:06:30,489 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:06:30,489 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 86 [2020-10-28 13:06:30,489 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:06:30,489 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:06:30,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 13:06:30,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 13:06:30,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 95 [2020-10-28 13:06:30,489 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:06:30,666 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 208 proven. 2 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2020-10-28 13:06:30,667 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1819934415] [2020-10-28 13:06:30,667 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 13:06:30,667 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 13:06:30,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474929238] [2020-10-28 13:06:30,668 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 13:06:30,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 13:06:30,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 13:06:30,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 13:06:30,669 INFO L87 Difference]: Start difference. First operand 16602 states and 19426 transitions. Second operand 7 states. [2020-10-28 13:06:33,974 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2020-10-28 13:06:43,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 13:06:43,315 INFO L93 Difference]: Finished difference Result 36961 states and 43985 transitions. [2020-10-28 13:06:43,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 13:06:43,318 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 506 [2020-10-28 13:06:43,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 13:06:43,374 INFO L225 Difference]: With dead ends: 36961 [2020-10-28 13:06:43,374 INFO L226 Difference]: Without dead ends: 20343 [2020-10-28 13:06:43,408 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-10-28 13:06:43,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20343 states. [2020-10-28 13:06:43,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20343 to 20330. [2020-10-28 13:06:43,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20330 states. [2020-10-28 13:06:43,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20330 states to 20330 states and 23527 transitions. [2020-10-28 13:06:43,884 INFO L78 Accepts]: Start accepts. Automaton has 20330 states and 23527 transitions. Word has length 506 [2020-10-28 13:06:43,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 13:06:43,885 INFO L481 AbstractCegarLoop]: Abstraction has 20330 states and 23527 transitions. [2020-10-28 13:06:43,885 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 13:06:43,885 INFO L276 IsEmpty]: Start isEmpty. Operand 20330 states and 23527 transitions. [2020-10-28 13:06:43,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 575 [2020-10-28 13:06:43,894 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 13:06:43,895 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 13:06:43,895 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-28 13:06:43,895 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 13:06:43,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 13:06:43,896 INFO L82 PathProgramCache]: Analyzing trace with hash 1442439658, now seen corresponding path program 1 times [2020-10-28 13:06:43,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 13:06:43,896 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [640736331] [2020-10-28 13:06:43,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 13:06:44,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:06:44,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:06:44,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:06:46,876 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:06:46,877 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 590 [2020-10-28 13:06:46,877 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 13:06:46,877 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2805 [2020-10-28 13:06:46,877 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:06:46,877 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:06:46,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 13:06:46,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 491 [2020-10-28 13:06:46,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 83 [2020-10-28 13:06:46,878 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:06:47,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 13:06:47,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:06:47,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:06:47,058 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:06:47,058 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 13:06:47,058 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:06:47,059 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 13:06:47,059 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:06:47,059 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:06:47,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 13:06:47,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:06:47,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 13:06:47,059 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:06:47,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 13:06:47,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:06:47,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:06:47,189 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:06:47,189 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 287 [2020-10-28 13:06:47,189 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:06:47,190 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 82 [2020-10-28 13:06:47,190 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:06:47,190 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:06:47,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 13:06:47,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:06:47,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 13:06:47,190 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:06:47,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 294 [2020-10-28 13:06:47,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:06:47,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:06:47,502 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:06:47,503 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 194 [2020-10-28 13:06:47,503 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:06:47,503 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 170 [2020-10-28 13:06:47,503 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:06:47,504 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:06:47,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 13:06:47,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:06:47,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 188 [2020-10-28 13:06:47,504 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:06:47,587 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 487 [2020-10-28 13:06:47,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:06:47,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:06:47,699 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:06:47,699 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-28 13:06:47,700 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:06:47,700 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 97 [2020-10-28 13:06:47,700 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:06:47,700 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:06:47,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 13:06:47,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 13:06:47,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-28 13:06:47,700 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:06:48,051 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 180 proven. 2 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2020-10-28 13:06:48,052 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [640736331] [2020-10-28 13:06:48,052 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 13:06:48,052 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 13:06:48,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561408952] [2020-10-28 13:06:48,053 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 13:06:48,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 13:06:48,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 13:06:48,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 13:06:48,055 INFO L87 Difference]: Start difference. First operand 20330 states and 23527 transitions. Second operand 7 states. [2020-10-28 13:06:50,846 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2020-10-28 13:06:52,241 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-10-28 13:07:05,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 13:07:05,540 INFO L93 Difference]: Finished difference Result 49070 states and 57426 transitions. [2020-10-28 13:07:05,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 13:07:05,543 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 574 [2020-10-28 13:07:05,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 13:07:05,611 INFO L225 Difference]: With dead ends: 49070 [2020-10-28 13:07:05,611 INFO L226 Difference]: Without dead ends: 29053 [2020-10-28 13:07:05,634 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-28 13:07:05,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29053 states. [2020-10-28 13:07:06,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29053 to 28101. [2020-10-28 13:07:06,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28101 states. [2020-10-28 13:07:06,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28101 states to 28101 states and 32255 transitions. [2020-10-28 13:07:06,176 INFO L78 Accepts]: Start accepts. Automaton has 28101 states and 32255 transitions. Word has length 574 [2020-10-28 13:07:06,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 13:07:06,177 INFO L481 AbstractCegarLoop]: Abstraction has 28101 states and 32255 transitions. [2020-10-28 13:07:06,177 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 13:07:06,177 INFO L276 IsEmpty]: Start isEmpty. Operand 28101 states and 32255 transitions. [2020-10-28 13:07:06,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 594 [2020-10-28 13:07:06,187 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 13:07:06,188 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 13:07:06,188 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-28 13:07:06,188 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 13:07:06,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 13:07:06,189 INFO L82 PathProgramCache]: Analyzing trace with hash 568458139, now seen corresponding path program 1 times [2020-10-28 13:07:06,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 13:07:06,189 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1253112569] [2020-10-28 13:07:06,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 13:07:06,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:07:06,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:07:06,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:07:08,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:07:08,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking...