/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/loops-crafted-1/Mono1_1-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 15:08:52,812 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 15:08:52,814 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 15:08:52,859 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 15:08:52,860 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 15:08:52,861 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 15:08:52,863 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 15:08:52,866 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 15:08:52,868 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 15:08:52,869 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 15:08:52,870 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 15:08:52,872 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 15:08:52,872 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 15:08:52,874 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 15:08:52,875 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 15:08:52,876 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 15:08:52,877 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 15:08:52,878 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 15:08:52,899 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 15:08:52,903 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 15:08:52,906 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 15:08:52,909 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 15:08:52,911 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 15:08:52,913 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 15:08:52,922 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 15:08:52,923 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 15:08:52,924 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 15:08:52,928 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 15:08:52,929 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 15:08:52,930 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 15:08:52,931 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 15:08:52,932 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 15:08:52,933 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 15:08:52,934 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 15:08:52,936 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 15:08:52,937 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 15:08:52,937 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 15:08:52,938 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 15:08:52,938 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 15:08:52,939 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 15:08:52,940 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 15:08:52,941 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 15:08:52,997 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 15:08:52,998 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 15:08:53,002 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 15:08:53,003 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 15:08:53,003 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 15:08:53,003 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 15:08:53,004 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 15:08:53,004 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 15:08:53,004 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 15:08:53,004 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 15:08:53,005 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 15:08:53,006 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 15:08:53,006 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 15:08:53,006 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 15:08:53,006 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 15:08:53,006 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 15:08:53,007 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 15:08:53,007 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 15:08:53,007 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 15:08:53,008 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 15:08:53,008 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 15:08:53,008 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 15:08:53,008 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 15:08:53,008 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 15:08:53,009 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 15:08:53,009 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 15:08:53,009 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 15:08:53,009 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 15:08:53,009 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 15:08:53,010 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 15:08:53,402 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 15:08:53,427 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 15:08:53,430 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 15:08:53,431 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 15:08:53,432 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 15:08:53,433 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/Mono1_1-1.c [2020-10-28 15:08:53,514 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4cd1a16a6/e7149fe1421d4ab69949f1586d5cae3c/FLAG16dae54f5 [2020-10-28 15:08:54,201 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 15:08:54,202 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops-crafted-1/Mono1_1-1.c [2020-10-28 15:08:54,209 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4cd1a16a6/e7149fe1421d4ab69949f1586d5cae3c/FLAG16dae54f5 [2020-10-28 15:08:54,538 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4cd1a16a6/e7149fe1421d4ab69949f1586d5cae3c [2020-10-28 15:08:54,541 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 15:08:54,548 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 15:08:54,549 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 15:08:54,550 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 15:08:54,553 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 15:08:54,554 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 03:08:54" (1/1) ... [2020-10-28 15:08:54,557 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4cb9e90c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:08:54, skipping insertion in model container [2020-10-28 15:08:54,558 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 03:08:54" (1/1) ... [2020-10-28 15:08:54,566 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 15:08:54,579 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 15:08:54,736 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 15:08:54,746 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 15:08:54,762 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 15:08:54,776 INFO L208 MainTranslator]: Completed translation [2020-10-28 15:08:54,777 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:08:54 WrapperNode [2020-10-28 15:08:54,777 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 15:08:54,778 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 15:08:54,778 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 15:08:54,778 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 15:08:54,790 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:08:54" (1/1) ... [2020-10-28 15:08:54,790 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:08:54" (1/1) ... [2020-10-28 15:08:54,797 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:08:54" (1/1) ... [2020-10-28 15:08:54,797 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:08:54" (1/1) ... [2020-10-28 15:08:54,803 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:08:54" (1/1) ... [2020-10-28 15:08:54,806 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:08:54" (1/1) ... [2020-10-28 15:08:54,807 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:08:54" (1/1) ... [2020-10-28 15:08:54,809 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 15:08:54,810 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 15:08:54,810 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 15:08:54,810 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 15:08:54,811 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:08:54" (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 15:08:54,879 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 15:08:54,879 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 15:08:54,879 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 15:08:54,879 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-28 15:08:54,880 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 15:08:54,880 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 15:08:54,880 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 15:08:54,880 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 15:08:54,880 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 15:08:54,880 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-28 15:08:54,881 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 15:08:54,881 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 15:08:54,881 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 15:08:54,881 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 15:08:54,881 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 15:08:54,881 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 15:08:54,882 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 15:08:55,299 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 15:08:55,300 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-28 15:08:55,302 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 03:08:55 BoogieIcfgContainer [2020-10-28 15:08:55,303 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 15:08:55,307 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 15:08:55,307 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 15:08:55,311 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 15:08:55,311 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 03:08:54" (1/3) ... [2020-10-28 15:08:55,313 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@203986a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 03:08:55, skipping insertion in model container [2020-10-28 15:08:55,313 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:08:54" (2/3) ... [2020-10-28 15:08:55,313 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@203986a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 03:08:55, skipping insertion in model container [2020-10-28 15:08:55,314 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 03:08:55" (3/3) ... [2020-10-28 15:08:55,316 INFO L111 eAbstractionObserver]: Analyzing ICFG Mono1_1-1.c [2020-10-28 15:08:55,328 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 15:08:55,333 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 15:08:55,348 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 15:08:55,412 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 15:08:55,412 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 15:08:55,412 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 15:08:55,412 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 15:08:55,413 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 15:08:55,413 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 15:08:55,413 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 15:08:55,413 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 15:08:55,441 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2020-10-28 15:08:55,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-28 15:08:55,449 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:08:55,450 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:08:55,450 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:08:55,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:08:55,460 INFO L82 PathProgramCache]: Analyzing trace with hash 1347720711, now seen corresponding path program 1 times [2020-10-28 15:08:55,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:08:55,472 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2141151922] [2020-10-28 15:08:55,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:08:55,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:08:55,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:55,788 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:08:55,788 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-28 15:08:55,789 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:08:55,789 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 148 [2020-10-28 15:08:55,791 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:08:55,791 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:08:55,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:08:55,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 15:08:55,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:08:55,792 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-28 15:08:55,877 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:08:55,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:08:55,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:55,899 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:08:55,899 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:08:55,900 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:08:55,900 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-28 15:08:55,900 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:08:55,900 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:08:55,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:08:55,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:08:55,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:08:55,901 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:08:55,929 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 15:08:55,930 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2141151922] [2020-10-28 15:08:55,932 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 15:08:55,932 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-28 15:08:55,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785633149] [2020-10-28 15:08:55,939 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-28 15:08:55,939 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:08:55,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-28 15:08:55,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-28 15:08:55,963 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 3 states. [2020-10-28 15:08:56,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:08:56,062 INFO L93 Difference]: Finished difference Result 35 states and 40 transitions. [2020-10-28 15:08:56,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-28 15:08:56,065 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2020-10-28 15:08:56,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:08:56,072 INFO L225 Difference]: With dead ends: 35 [2020-10-28 15:08:56,073 INFO L226 Difference]: Without dead ends: 14 [2020-10-28 15:08:56,077 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-28 15:08:56,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-10-28 15:08:56,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-10-28 15:08:56,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-10-28 15:08:56,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2020-10-28 15:08:56,118 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 12 [2020-10-28 15:08:56,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:08:56,118 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2020-10-28 15:08:56,118 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-28 15:08:56,118 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2020-10-28 15:08:56,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-28 15:08:56,119 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:08:56,119 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:08:56,120 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 15:08:56,120 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:08:56,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:08:56,121 INFO L82 PathProgramCache]: Analyzing trace with hash 1061429201, now seen corresponding path program 1 times [2020-10-28 15:08:56,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:08:56,121 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [406980062] [2020-10-28 15:08:56,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:08:56,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:08:56,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:56,284 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:08:56,284 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-28 15:08:56,284 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:08:56,284 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 142 [2020-10-28 15:08:56,285 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:08:56,285 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:08:56,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 15:08:56,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:08:56,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 15:08:56,285 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:08:56,376 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:08:56,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:08:56,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:56,400 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:08:56,400 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:08:56,400 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:08:56,400 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-28 15:08:56,401 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:08:56,401 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:08:56,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:08:56,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:08:56,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:08:56,402 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:08:56,408 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 15:08:56,409 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [406980062] [2020-10-28 15:08:56,409 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 15:08:56,409 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 15:08:56,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132880384] [2020-10-28 15:08:56,411 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 15:08:56,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:08:56,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 15:08:56,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 15:08:56,413 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 4 states. [2020-10-28 15:08:56,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:08:56,499 INFO L93 Difference]: Finished difference Result 24 states and 28 transitions. [2020-10-28 15:08:56,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 15:08:56,500 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-10-28 15:08:56,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:08:56,501 INFO L225 Difference]: With dead ends: 24 [2020-10-28 15:08:56,501 INFO L226 Difference]: Without dead ends: 16 [2020-10-28 15:08:56,502 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 15:08:56,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-10-28 15:08:56,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-10-28 15:08:56,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-10-28 15:08:56,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2020-10-28 15:08:56,511 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 12 [2020-10-28 15:08:56,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:08:56,512 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2020-10-28 15:08:56,512 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 15:08:56,512 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2020-10-28 15:08:56,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-28 15:08:56,513 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:08:56,513 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:08:56,513 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 15:08:56,513 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:08:56,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:08:56,514 INFO L82 PathProgramCache]: Analyzing trace with hash 1101414388, now seen corresponding path program 1 times [2020-10-28 15:08:56,515 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:08:56,515 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [293788693] [2020-10-28 15:08:56,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:08:56,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:08:56,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:56,644 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:08:56,644 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-28 15:08:56,644 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:08:56,645 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 113 [2020-10-28 15:08:56,645 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:08:56,645 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:08:56,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 15:08:56,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-28 15:08:56,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 15:08:56,647 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-28 15:08:56,738 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:08:56,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:08:56,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:56,750 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:08:56,750 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:08:56,750 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:08:56,751 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 15:08:56,751 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:08:56,751 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:08:56,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:08:56,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:08:56,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:08:56,752 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:08:56,758 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:08:56,758 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [293788693] [2020-10-28 15:08:56,759 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 15:08:56,759 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 15:08:56,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106349666] [2020-10-28 15:08:56,760 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 15:08:56,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:08:56,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 15:08:56,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 15:08:56,761 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand 4 states. [2020-10-28 15:08:56,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:08:56,843 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions. [2020-10-28 15:08:56,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 15:08:56,843 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-10-28 15:08:56,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:08:56,844 INFO L225 Difference]: With dead ends: 24 [2020-10-28 15:08:56,844 INFO L226 Difference]: Without dead ends: 18 [2020-10-28 15:08:56,845 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 15:08:56,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-10-28 15:08:56,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2020-10-28 15:08:56,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-10-28 15:08:56,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2020-10-28 15:08:56,853 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 14 [2020-10-28 15:08:56,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:08:56,853 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2020-10-28 15:08:56,853 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 15:08:56,854 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2020-10-28 15:08:56,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-28 15:08:56,854 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:08:56,855 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:08:56,855 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 15:08:56,855 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:08:56,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:08:56,856 INFO L82 PathProgramCache]: Analyzing trace with hash -1647486503, now seen corresponding path program 1 times [2020-10-28 15:08:56,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:08:56,856 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1052848686] [2020-10-28 15:08:56,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:08:56,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:08:56,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:56,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:57,024 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:08:57,024 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-28 15:08:57,024 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:08:57,024 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 140 [2020-10-28 15:08:57,025 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:08:57,025 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:08:57,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 15:08:57,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:08:57,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-28 15:08:57,026 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:08:57,095 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:08:57,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:08:57,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:57,105 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:08:57,105 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:08:57,105 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:08:57,106 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 15:08:57,106 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:08:57,106 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:08:57,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:08:57,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:08:57,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:08:57,107 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:08:57,113 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:08:57,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1052848686] [2020-10-28 15:08:57,114 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:08:57,114 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 15:08:57,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317114871] [2020-10-28 15:08:57,115 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 15:08:57,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:08:57,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 15:08:57,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 15:08:57,116 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 5 states. [2020-10-28 15:08:57,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:08:57,228 INFO L93 Difference]: Finished difference Result 28 states and 31 transitions. [2020-10-28 15:08:57,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 15:08:57,228 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-10-28 15:08:57,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:08:57,229 INFO L225 Difference]: With dead ends: 28 [2020-10-28 15:08:57,229 INFO L226 Difference]: Without dead ends: 19 [2020-10-28 15:08:57,230 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-28 15:08:57,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-10-28 15:08:57,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-10-28 15:08:57,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-28 15:08:57,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2020-10-28 15:08:57,237 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 16 [2020-10-28 15:08:57,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:08:57,238 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2020-10-28 15:08:57,238 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 15:08:57,238 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2020-10-28 15:08:57,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-28 15:08:57,239 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:08:57,239 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:08:57,239 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 15:08:57,239 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:08:57,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:08:57,240 INFO L82 PathProgramCache]: Analyzing trace with hash 1678553212, now seen corresponding path program 2 times [2020-10-28 15:08:57,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:08:57,240 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1454450207] [2020-10-28 15:08:57,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:08:57,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:08:57,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:57,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:57,464 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:08:57,464 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-28 15:08:57,464 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:08:57,465 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 211 [2020-10-28 15:08:57,465 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:08:57,465 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:08:57,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 15:08:57,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:08:57,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-28 15:08:57,466 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:08:57,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:08:57,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:08:57,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:57,568 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:08:57,568 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:08:57,569 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:08:57,569 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 15:08:57,569 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:08:57,569 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:08:57,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:08:57,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:08:57,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:08:57,570 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:08:57,575 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:08:57,575 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1454450207] [2020-10-28 15:08:57,576 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:08:57,576 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 15:08:57,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274117684] [2020-10-28 15:08:57,577 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 15:08:57,577 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:08:57,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 15:08:57,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-28 15:08:57,578 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand 6 states. [2020-10-28 15:08:57,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:08:57,755 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2020-10-28 15:08:57,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 15:08:57,756 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2020-10-28 15:08:57,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:08:57,757 INFO L225 Difference]: With dead ends: 30 [2020-10-28 15:08:57,757 INFO L226 Difference]: Without dead ends: 21 [2020-10-28 15:08:57,758 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-28 15:08:57,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-10-28 15:08:57,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-10-28 15:08:57,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-28 15:08:57,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-10-28 15:08:57,765 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 18 [2020-10-28 15:08:57,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:08:57,766 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-10-28 15:08:57,766 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 15:08:57,766 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-10-28 15:08:57,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-28 15:08:57,767 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:08:57,767 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:08:57,767 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 15:08:57,768 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:08:57,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:08:57,768 INFO L82 PathProgramCache]: Analyzing trace with hash -1747916193, now seen corresponding path program 3 times [2020-10-28 15:08:57,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:08:57,769 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1107211395] [2020-10-28 15:08:57,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:08:57,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:08:57,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:57,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:57,932 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:08:57,933 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-28 15:08:57,933 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:08:57,933 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 151 [2020-10-28 15:08:57,933 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:08:57,933 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:08:57,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 15:08:57,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-28 15:08:57,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-28 15:08:57,934 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:08:57,996 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:08:57,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:08:57,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:58,004 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:08:58,004 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:08:58,005 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:08:58,005 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 15:08:58,005 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:08:58,005 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:08:58,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:08:58,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:08:58,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:08:58,006 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:08:58,010 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-28 15:08:58,011 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1107211395] [2020-10-28 15:08:58,011 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:08:58,011 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 15:08:58,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162567354] [2020-10-28 15:08:58,012 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 15:08:58,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:08:58,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 15:08:58,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 15:08:58,013 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 5 states. [2020-10-28 15:08:58,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:08:58,182 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2020-10-28 15:08:58,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 15:08:58,182 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2020-10-28 15:08:58,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:08:58,185 INFO L225 Difference]: With dead ends: 30 [2020-10-28 15:08:58,185 INFO L226 Difference]: Without dead ends: 24 [2020-10-28 15:08:58,186 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-28 15:08:58,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-10-28 15:08:58,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2020-10-28 15:08:58,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-28 15:08:58,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2020-10-28 15:08:58,193 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 20 [2020-10-28 15:08:58,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:08:58,194 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2020-10-28 15:08:58,194 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 15:08:58,194 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2020-10-28 15:08:58,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-28 15:08:58,195 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:08:58,195 INFO L422 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:08:58,195 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 15:08:58,195 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:08:58,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:08:58,196 INFO L82 PathProgramCache]: Analyzing trace with hash 334960004, now seen corresponding path program 4 times [2020-10-28 15:08:58,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:08:58,197 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1908381686] [2020-10-28 15:08:58,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:08:58,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:08:58,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:58,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:58,508 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:08:58,508 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-28 15:08:58,508 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:08:58,508 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 300 [2020-10-28 15:08:58,509 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:08:58,509 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:08:58,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 15:08:58,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:08:58,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-28 15:08:58,509 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:08:58,633 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:08:58,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:08:58,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:58,643 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:08:58,643 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:08:58,643 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:08:58,643 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 15:08:58,643 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:08:58,644 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:08:58,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:08:58,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:08:58,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:08:58,644 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:08:58,653 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 15:08:58,654 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1908381686] [2020-10-28 15:08:58,654 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:08:58,654 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 15:08:58,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770185594] [2020-10-28 15:08:58,655 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 15:08:58,655 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:08:58,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 15:08:58,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 15:08:58,657 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 7 states. [2020-10-28 15:08:58,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:08:58,886 INFO L93 Difference]: Finished difference Result 36 states and 41 transitions. [2020-10-28 15:08:58,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 15:08:58,886 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 22 [2020-10-28 15:08:58,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:08:58,887 INFO L225 Difference]: With dead ends: 36 [2020-10-28 15:08:58,887 INFO L226 Difference]: Without dead ends: 25 [2020-10-28 15:08:58,888 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-28 15:08:58,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-10-28 15:08:58,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-10-28 15:08:58,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-28 15:08:58,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2020-10-28 15:08:58,895 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 22 [2020-10-28 15:08:58,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:08:58,895 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2020-10-28 15:08:58,895 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 15:08:58,895 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2020-10-28 15:08:58,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-28 15:08:58,896 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:08:58,896 INFO L422 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:08:58,897 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 15:08:58,897 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:08:58,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:08:58,897 INFO L82 PathProgramCache]: Analyzing trace with hash -176839193, now seen corresponding path program 5 times [2020-10-28 15:08:58,898 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:08:58,898 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1027320864] [2020-10-28 15:08:58,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:08:58,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:08:58,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:58,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:59,250 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:08:59,251 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-28 15:08:59,251 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:08:59,251 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 340 [2020-10-28 15:08:59,251 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:08:59,251 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:08:59,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 15:08:59,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:08:59,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-28 15:08:59,252 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:08:59,366 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:08:59,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:08:59,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:59,374 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:08:59,375 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:08:59,375 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:08:59,375 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 15:08:59,375 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:08:59,375 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:08:59,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:08:59,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:08:59,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:08:59,376 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:08:59,381 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 15:08:59,382 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1027320864] [2020-10-28 15:08:59,382 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:08:59,382 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 15:08:59,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223560643] [2020-10-28 15:08:59,383 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 15:08:59,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:08:59,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 15:08:59,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-28 15:08:59,384 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 8 states. [2020-10-28 15:08:59,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:08:59,667 INFO L93 Difference]: Finished difference Result 38 states and 43 transitions. [2020-10-28 15:08:59,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 15:08:59,671 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 24 [2020-10-28 15:08:59,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:08:59,672 INFO L225 Difference]: With dead ends: 38 [2020-10-28 15:08:59,672 INFO L226 Difference]: Without dead ends: 27 [2020-10-28 15:08:59,673 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-28 15:08:59,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-28 15:08:59,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-10-28 15:08:59,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-28 15:08:59,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2020-10-28 15:08:59,686 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 24 [2020-10-28 15:08:59,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:08:59,686 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2020-10-28 15:08:59,686 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 15:08:59,686 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2020-10-28 15:08:59,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-28 15:08:59,687 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:08:59,687 INFO L422 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:08:59,687 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 15:08:59,688 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:08:59,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:08:59,689 INFO L82 PathProgramCache]: Analyzing trace with hash 1905371530, now seen corresponding path program 6 times [2020-10-28 15:08:59,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:08:59,689 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1365048038] [2020-10-28 15:08:59,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:08:59,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:08:59,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:59,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:00,031 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:09:00,031 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-28 15:09:00,032 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:09:00,032 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 326 [2020-10-28 15:09:00,032 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:09:00,032 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:09:00,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 15:09:00,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-28 15:09:00,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 15:09:00,033 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:09:00,124 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:09:00,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:09:00,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:00,132 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:09:00,133 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:09:00,133 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:09:00,133 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 15:09:00,133 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:09:00,133 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:09:00,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:09:00,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:09:00,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:09:00,134 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:09:00,139 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 25 proven. 4 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-10-28 15:09:00,139 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1365048038] [2020-10-28 15:09:00,140 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:09:00,140 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 15:09:00,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62973419] [2020-10-28 15:09:00,142 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 15:09:00,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:09:00,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 15:09:00,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-28 15:09:00,148 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand 6 states. [2020-10-28 15:09:02,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:09:02,597 INFO L93 Difference]: Finished difference Result 38 states and 43 transitions. [2020-10-28 15:09:02,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 15:09:02,602 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 26 [2020-10-28 15:09:02,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:09:02,620 INFO L225 Difference]: With dead ends: 38 [2020-10-28 15:09:02,621 INFO L226 Difference]: Without dead ends: 32 [2020-10-28 15:09:02,621 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2020-10-28 15:09:02,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-28 15:09:02,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 29. [2020-10-28 15:09:02,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-28 15:09:02,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2020-10-28 15:09:02,629 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 26 [2020-10-28 15:09:02,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:09:02,630 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2020-10-28 15:09:02,630 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 15:09:02,630 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2020-10-28 15:09:02,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-28 15:09:02,631 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:09:02,631 INFO L422 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:09:02,631 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 15:09:02,631 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:09:02,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:09:02,632 INFO L82 PathProgramCache]: Analyzing trace with hash -2138786321, now seen corresponding path program 7 times [2020-10-28 15:09:02,635 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:09:02,635 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1091557015] [2020-10-28 15:09:02,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:09:02,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:09:02,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:02,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:03,305 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:09:03,305 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-28 15:09:03,306 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:09:03,306 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 653 [2020-10-28 15:09:03,306 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:09:03,306 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:09:03,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 15:09:03,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:09:03,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-28 15:09:03,307 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:09:03,436 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:09:03,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:09:03,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:03,442 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:09:03,442 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:09:03,442 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:09:03,442 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:09:03,442 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:09:03,443 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:09:03,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:09:03,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:09:03,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:09:03,443 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:09:03,448 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 30 proven. 30 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-28 15:09:03,448 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1091557015] [2020-10-28 15:09:03,448 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:09:03,448 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-28 15:09:03,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537841840] [2020-10-28 15:09:03,449 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 15:09:03,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:09:03,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 15:09:03,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-10-28 15:09:03,450 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand 9 states. [2020-10-28 15:09:03,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:09:03,795 INFO L93 Difference]: Finished difference Result 44 states and 51 transitions. [2020-10-28 15:09:03,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 15:09:03,795 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 28 [2020-10-28 15:09:03,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:09:03,796 INFO L225 Difference]: With dead ends: 44 [2020-10-28 15:09:03,796 INFO L226 Difference]: Without dead ends: 31 [2020-10-28 15:09:03,797 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-28 15:09:03,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-28 15:09:03,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-10-28 15:09:03,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-28 15:09:03,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2020-10-28 15:09:03,805 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 28 [2020-10-28 15:09:03,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:09:03,805 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2020-10-28 15:09:03,805 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 15:09:03,805 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2020-10-28 15:09:03,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-28 15:09:03,806 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:09:03,806 INFO L422 BasicCegarLoop]: trace histogram [9, 6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:09:03,807 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 15:09:03,807 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:09:03,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:09:03,807 INFO L82 PathProgramCache]: Analyzing trace with hash -1042272238, now seen corresponding path program 8 times [2020-10-28 15:09:03,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:09:03,808 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1101579988] [2020-10-28 15:09:03,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:09:03,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:09:03,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:03,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:04,373 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:09:04,374 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-28 15:09:04,374 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:09:04,374 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 552 [2020-10-28 15:09:04,375 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:09:04,375 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:09:04,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 15:09:04,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:09:04,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-28 15:09:04,376 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:09:04,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:09:04,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:09:04,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:04,549 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:09:04,549 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:09:04,549 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:09:04,550 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 15:09:04,550 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:09:04,550 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:09:04,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:09:04,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:09:04,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:09:04,551 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:09:04,556 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 35 proven. 42 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-28 15:09:04,556 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1101579988] [2020-10-28 15:09:04,557 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:09:04,557 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 15:09:04,557 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974738867] [2020-10-28 15:09:04,557 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 15:09:04,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:09:04,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 15:09:04,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-28 15:09:04,559 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand 10 states. [2020-10-28 15:09:04,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:09:04,975 INFO L93 Difference]: Finished difference Result 46 states and 53 transitions. [2020-10-28 15:09:04,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 15:09:04,976 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 30 [2020-10-28 15:09:04,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:09:04,977 INFO L225 Difference]: With dead ends: 46 [2020-10-28 15:09:04,977 INFO L226 Difference]: Without dead ends: 33 [2020-10-28 15:09:04,978 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-10-28 15:09:04,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-28 15:09:04,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-10-28 15:09:04,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-28 15:09:04,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2020-10-28 15:09:04,986 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 30 [2020-10-28 15:09:04,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:09:04,986 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2020-10-28 15:09:04,986 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 15:09:04,986 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2020-10-28 15:09:04,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-28 15:09:04,987 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:09:04,987 INFO L422 BasicCegarLoop]: trace histogram [10, 7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:09:04,987 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 15:09:04,988 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:09:04,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:09:04,988 INFO L82 PathProgramCache]: Analyzing trace with hash 440774005, now seen corresponding path program 9 times [2020-10-28 15:09:04,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:09:04,989 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [318300416] [2020-10-28 15:09:04,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:09:05,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:09:05,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:05,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:05,605 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:09:05,606 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-28 15:09:05,606 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:09:05,606 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 604 [2020-10-28 15:09:05,606 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:09:05,606 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:09:05,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 15:09:05,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-28 15:09:05,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-28 15:09:05,607 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:09:05,749 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:09:05,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:09:05,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:05,755 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:09:05,756 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:09:05,756 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:09:05,756 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 15:09:05,756 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:09:05,756 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:09:05,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:09:05,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:09:05,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:09:05,757 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:09:05,762 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 49 proven. 9 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2020-10-28 15:09:05,763 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [318300416] [2020-10-28 15:09:05,763 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:09:05,763 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 15:09:05,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246641345] [2020-10-28 15:09:05,764 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 15:09:05,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:09:05,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 15:09:05,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 15:09:05,765 INFO L87 Difference]: Start difference. First operand 33 states and 36 transitions. Second operand 7 states. [2020-10-28 15:09:08,568 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 49 [2020-10-28 15:09:08,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:09:08,805 INFO L93 Difference]: Finished difference Result 44 states and 50 transitions. [2020-10-28 15:09:08,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 15:09:08,806 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 32 [2020-10-28 15:09:08,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:09:08,807 INFO L225 Difference]: With dead ends: 44 [2020-10-28 15:09:08,807 INFO L226 Difference]: Without dead ends: 38 [2020-10-28 15:09:08,808 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2020-10-28 15:09:08,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-28 15:09:08,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 35. [2020-10-28 15:09:08,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-28 15:09:08,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2020-10-28 15:09:08,816 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 32 [2020-10-28 15:09:08,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:09:08,817 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2020-10-28 15:09:08,817 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 15:09:08,817 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2020-10-28 15:09:08,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-28 15:09:08,818 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:09:08,818 INFO L422 BasicCegarLoop]: trace histogram [11, 7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:09:08,818 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 15:09:08,818 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:09:08,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:09:08,819 INFO L82 PathProgramCache]: Analyzing trace with hash -867734758, now seen corresponding path program 10 times [2020-10-28 15:09:08,819 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:09:08,819 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1918837491] [2020-10-28 15:09:08,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:09:08,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:09:08,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:08,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:09,880 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:09:09,881 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-28 15:09:09,881 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:09:09,881 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1048 [2020-10-28 15:09:09,881 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:09:09,881 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:09:09,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 15:09:09,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:09:09,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-28 15:09:09,882 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:09:10,072 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:09:10,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:09:10,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:10,080 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:09:10,080 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:09:10,080 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:09:10,080 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 15:09:10,081 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:09:10,081 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:09:10,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:09:10,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:09:10,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:09:10,082 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:09:10,087 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 56 proven. 56 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-28 15:09:10,088 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1918837491] [2020-10-28 15:09:10,088 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:09:10,088 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 15:09:10,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824851203] [2020-10-28 15:09:10,090 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 15:09:10,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:09:10,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 15:09:10,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-28 15:09:10,092 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand 11 states. [2020-10-28 15:09:10,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:09:10,650 INFO L93 Difference]: Finished difference Result 52 states and 61 transitions. [2020-10-28 15:09:10,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 15:09:10,651 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 34 [2020-10-28 15:09:10,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:09:10,652 INFO L225 Difference]: With dead ends: 52 [2020-10-28 15:09:10,653 INFO L226 Difference]: Without dead ends: 37 [2020-10-28 15:09:10,654 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2020-10-28 15:09:10,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-28 15:09:10,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-10-28 15:09:10,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-28 15:09:10,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2020-10-28 15:09:10,662 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 34 [2020-10-28 15:09:10,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:09:10,663 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2020-10-28 15:09:10,663 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 15:09:10,663 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2020-10-28 15:09:10,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-28 15:09:10,664 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:09:10,664 INFO L422 BasicCegarLoop]: trace histogram [12, 8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:09:10,664 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-28 15:09:10,664 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:09:10,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:09:10,665 INFO L82 PathProgramCache]: Analyzing trace with hash 1360625405, now seen corresponding path program 11 times [2020-10-28 15:09:10,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:09:10,665 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [341564095] [2020-10-28 15:09:10,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:09:10,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:09:10,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:10,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:11,601 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:09:11,601 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-28 15:09:11,602 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:09:11,602 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 923 [2020-10-28 15:09:11,602 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:09:11,602 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:09:11,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 15:09:11,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-28 15:09:11,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-28 15:09:11,603 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:09:11,791 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:09:11,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:09:11,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:11,798 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:09:11,798 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:09:11,798 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:09:11,798 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 15:09:11,798 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:09:11,799 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:09:11,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:09:11,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:09:11,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:09:11,799 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:09:11,805 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 72 proven. 16 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2020-10-28 15:09:11,805 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [341564095] [2020-10-28 15:09:11,805 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:09:11,805 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 15:09:11,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159510320] [2020-10-28 15:09:11,806 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 15:09:11,806 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:09:11,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 15:09:11,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-28 15:09:11,807 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand 8 states. [2020-10-28 15:09:12,188 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 49 [2020-10-28 15:09:12,620 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 49 [2020-10-28 15:09:15,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:09:15,006 INFO L93 Difference]: Finished difference Result 48 states and 55 transitions. [2020-10-28 15:09:15,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 15:09:15,007 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 36 [2020-10-28 15:09:15,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:09:15,008 INFO L225 Difference]: With dead ends: 48 [2020-10-28 15:09:15,008 INFO L226 Difference]: Without dead ends: 42 [2020-10-28 15:09:15,009 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2020-10-28 15:09:15,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-28 15:09:15,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 39. [2020-10-28 15:09:15,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-28 15:09:15,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 44 transitions. [2020-10-28 15:09:15,031 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 44 transitions. Word has length 36 [2020-10-28 15:09:15,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:09:15,032 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 44 transitions. [2020-10-28 15:09:15,032 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 15:09:15,036 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 44 transitions. [2020-10-28 15:09:15,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-28 15:09:15,037 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:09:15,037 INFO L422 BasicCegarLoop]: trace histogram [13, 8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:09:15,037 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-28 15:09:15,037 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:09:15,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:09:15,038 INFO L82 PathProgramCache]: Analyzing trace with hash -1653802334, now seen corresponding path program 12 times [2020-10-28 15:09:15,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:09:15,038 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [704752367] [2020-10-28 15:09:15,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:09:15,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:09:15,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:15,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:16,118 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:09:16,119 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-28 15:09:16,119 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:09:16,119 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1053 [2020-10-28 15:09:16,119 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:09:16,119 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:09:16,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 15:09:16,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:09:16,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-28 15:09:16,120 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:09:16,337 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:09:16,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:09:16,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:16,346 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:09:16,347 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:09:16,347 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:09:16,347 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 15:09:16,347 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:09:16,347 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:09:16,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:09:16,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:09:16,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:09:16,348 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:09:16,353 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 81 proven. 72 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-28 15:09:16,354 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [704752367] [2020-10-28 15:09:16,354 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:09:16,354 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 15:09:16,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519505845] [2020-10-28 15:09:16,355 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 15:09:16,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:09:16,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 15:09:16,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-10-28 15:09:16,356 INFO L87 Difference]: Start difference. First operand 39 states and 44 transitions. Second operand 12 states. [2020-10-28 15:09:16,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:09:16,940 INFO L93 Difference]: Finished difference Result 58 states and 69 transitions. [2020-10-28 15:09:16,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 15:09:16,940 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 38 [2020-10-28 15:09:16,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:09:16,941 INFO L225 Difference]: With dead ends: 58 [2020-10-28 15:09:16,941 INFO L226 Difference]: Without dead ends: 41 [2020-10-28 15:09:16,942 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2020-10-28 15:09:16,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-28 15:09:16,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2020-10-28 15:09:16,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-28 15:09:16,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 46 transitions. [2020-10-28 15:09:16,952 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 46 transitions. Word has length 38 [2020-10-28 15:09:16,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:09:16,952 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 46 transitions. [2020-10-28 15:09:16,952 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 15:09:16,952 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 46 transitions. [2020-10-28 15:09:16,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-28 15:09:16,953 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:09:16,953 INFO L422 BasicCegarLoop]: trace histogram [14, 9, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:09:16,953 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-28 15:09:16,954 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:09:16,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:09:16,954 INFO L82 PathProgramCache]: Analyzing trace with hash -2122554107, now seen corresponding path program 13 times [2020-10-28 15:09:16,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:09:16,955 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [732766599] [2020-10-28 15:09:16,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:09:16,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:09:16,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:17,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:18,348 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:09:18,349 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-28 15:09:18,349 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:09:18,349 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1379 [2020-10-28 15:09:18,349 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:09:18,349 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:09:18,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 15:09:18,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:09:18,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-28 15:09:18,350 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:09:18,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:09:18,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:09:18,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:18,597 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:09:18,597 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:09:18,597 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:09:18,598 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:09:18,598 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:09:18,598 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:09:18,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:09:18,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:09:18,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:09:18,599 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:09:18,605 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 90 proven. 90 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-28 15:09:18,606 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [732766599] [2020-10-28 15:09:18,606 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:09:18,606 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 15:09:18,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058609861] [2020-10-28 15:09:18,606 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 15:09:18,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:09:18,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 15:09:18,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-10-28 15:09:18,607 INFO L87 Difference]: Start difference. First operand 41 states and 46 transitions. Second operand 13 states. [2020-10-28 15:09:19,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:09:19,262 INFO L93 Difference]: Finished difference Result 60 states and 71 transitions. [2020-10-28 15:09:19,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 15:09:19,263 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 40 [2020-10-28 15:09:19,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:09:19,264 INFO L225 Difference]: With dead ends: 60 [2020-10-28 15:09:19,264 INFO L226 Difference]: Without dead ends: 43 [2020-10-28 15:09:19,265 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2020-10-28 15:09:19,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-28 15:09:19,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2020-10-28 15:09:19,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-28 15:09:19,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 48 transitions. [2020-10-28 15:09:19,275 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 48 transitions. Word has length 40 [2020-10-28 15:09:19,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:09:19,275 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 48 transitions. [2020-10-28 15:09:19,275 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 15:09:19,275 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 48 transitions. [2020-10-28 15:09:19,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-28 15:09:19,276 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:09:19,276 INFO L422 BasicCegarLoop]: trace histogram [15, 10, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:09:19,276 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-28 15:09:19,276 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:09:19,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:09:19,277 INFO L82 PathProgramCache]: Analyzing trace with hash -1621441880, now seen corresponding path program 14 times [2020-10-28 15:09:19,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:09:19,277 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1643492438] [2020-10-28 15:09:19,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:09:19,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:09:19,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:19,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:20,832 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:09:20,833 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-28 15:09:20,833 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:09:20,833 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1535 [2020-10-28 15:09:20,833 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:09:20,833 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:09:20,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 15:09:20,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-28 15:09:20,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-28 15:09:20,834 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:09:21,032 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:09:21,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:09:21,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:21,038 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:09:21,038 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:09:21,038 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:09:21,038 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:09:21,039 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:09:21,039 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:09:21,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:09:21,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:09:21,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:09:21,040 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:09:21,046 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 110 proven. 25 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2020-10-28 15:09:21,047 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1643492438] [2020-10-28 15:09:21,047 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:09:21,047 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-28 15:09:21,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279105613] [2020-10-28 15:09:21,048 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 15:09:21,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:09:21,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 15:09:21,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-10-28 15:09:21,052 INFO L87 Difference]: Start difference. First operand 43 states and 48 transitions. Second operand 9 states. [2020-10-28 15:09:21,922 WARN L193 SmtUtils]: Spent 513.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 47 [2020-10-28 15:09:22,225 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 47 [2020-10-28 15:09:24,410 WARN L193 SmtUtils]: Spent 2.11 s on a formula simplification that was a NOOP. DAG size: 54 [2020-10-28 15:09:32,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:09:32,713 INFO L93 Difference]: Finished difference Result 54 states and 62 transitions. [2020-10-28 15:09:32,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 15:09:32,713 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 42 [2020-10-28 15:09:32,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:09:32,714 INFO L225 Difference]: With dead ends: 54 [2020-10-28 15:09:32,714 INFO L226 Difference]: Without dead ends: 48 [2020-10-28 15:09:32,714 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2020-10-28 15:09:32,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-28 15:09:32,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 45. [2020-10-28 15:09:32,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-28 15:09:32,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 51 transitions. [2020-10-28 15:09:32,729 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 51 transitions. Word has length 42 [2020-10-28 15:09:32,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:09:32,730 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 51 transitions. [2020-10-28 15:09:32,730 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 15:09:32,730 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 51 transitions. [2020-10-28 15:09:32,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-28 15:09:32,732 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:09:32,732 INFO L422 BasicCegarLoop]: trace histogram [16, 10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:09:32,732 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-28 15:09:32,732 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:09:32,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:09:32,733 INFO L82 PathProgramCache]: Analyzing trace with hash 1617690509, now seen corresponding path program 15 times [2020-10-28 15:09:32,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:09:32,733 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [227715531] [2020-10-28 15:09:32,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:09:32,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:09:32,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:32,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:34,633 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:09:34,633 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-28 15:09:34,633 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:09:34,633 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1881 [2020-10-28 15:09:34,633 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:09:34,634 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:09:34,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 15:09:34,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:09:34,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-28 15:09:34,634 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:09:34,869 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:09:34,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:09:34,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:34,876 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:09:34,877 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:09:34,877 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:09:34,877 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 15:09:34,877 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:09:34,877 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:09:34,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:09:34,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:09:34,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:09:34,886 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 9 [2020-10-28 15:09:34,893 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 121 proven. 110 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-28 15:09:34,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [227715531] [2020-10-28 15:09:34,893 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:09:34,894 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 15:09:34,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326250924] [2020-10-28 15:09:34,894 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 15:09:34,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:09:34,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 15:09:34,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2020-10-28 15:09:34,895 INFO L87 Difference]: Start difference. First operand 45 states and 51 transitions. Second operand 14 states. [2020-10-28 15:09:35,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:09:35,705 INFO L93 Difference]: Finished difference Result 66 states and 79 transitions. [2020-10-28 15:09:35,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 15:09:35,706 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 44 [2020-10-28 15:09:35,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:09:35,707 INFO L225 Difference]: With dead ends: 66 [2020-10-28 15:09:35,708 INFO L226 Difference]: Without dead ends: 47 [2020-10-28 15:09:35,708 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=99, Invalid=501, Unknown=0, NotChecked=0, Total=600 [2020-10-28 15:09:35,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-28 15:09:35,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2020-10-28 15:09:35,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-28 15:09:35,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 53 transitions. [2020-10-28 15:09:35,720 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 53 transitions. Word has length 44 [2020-10-28 15:09:35,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:09:35,721 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 53 transitions. [2020-10-28 15:09:35,721 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 15:09:35,721 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 53 transitions. [2020-10-28 15:09:35,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-28 15:09:35,721 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:09:35,722 INFO L422 BasicCegarLoop]: trace histogram [17, 11, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:09:35,722 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-28 15:09:35,722 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:09:35,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:09:35,722 INFO L82 PathProgramCache]: Analyzing trace with hash -2033396816, now seen corresponding path program 16 times [2020-10-28 15:09:35,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:09:35,723 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [381905056] [2020-10-28 15:09:35,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:09:35,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:09:35,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:35,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:37,976 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:09:37,976 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-28 15:09:37,977 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:09:37,977 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2229 [2020-10-28 15:09:37,977 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:09:37,977 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:09:37,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 15:09:37,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-28 15:09:37,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-28 15:09:37,978 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:09:38,165 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:09:38,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:09:38,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:38,175 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:09:38,175 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:09:38,176 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:09:38,176 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 15:09:38,176 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:09:38,176 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:09:38,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:09:38,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:09:38,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:09:38,177 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:09:38,184 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 143 proven. 36 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2020-10-28 15:09:38,184 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [381905056] [2020-10-28 15:09:38,184 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:09:38,184 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 15:09:38,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116903170] [2020-10-28 15:09:38,185 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 15:09:38,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:09:38,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 15:09:38,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-28 15:09:38,186 INFO L87 Difference]: Start difference. First operand 47 states and 53 transitions. Second operand 10 states. [2020-10-28 15:09:38,633 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 49 [2020-10-28 15:09:39,564 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 49 [2020-10-28 15:09:40,330 WARN L193 SmtUtils]: Spent 494.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 49 [2020-10-28 15:09:46,853 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 49 [2020-10-28 15:09:52,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:09:52,591 INFO L93 Difference]: Finished difference Result 58 states and 67 transitions. [2020-10-28 15:09:52,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 15:09:52,593 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 46 [2020-10-28 15:09:52,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:09:52,594 INFO L225 Difference]: With dead ends: 58 [2020-10-28 15:09:52,595 INFO L226 Difference]: Without dead ends: 52 [2020-10-28 15:09:52,595 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=99, Invalid=206, Unknown=1, NotChecked=0, Total=306 [2020-10-28 15:09:52,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-28 15:09:52,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 49. [2020-10-28 15:09:52,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-28 15:09:52,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 56 transitions. [2020-10-28 15:09:52,605 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 56 transitions. Word has length 46 [2020-10-28 15:09:52,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:09:52,605 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 56 transitions. [2020-10-28 15:09:52,606 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 15:09:52,606 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 56 transitions. [2020-10-28 15:09:52,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-28 15:09:52,606 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:09:52,606 INFO L422 BasicCegarLoop]: trace histogram [18, 11, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:09:52,607 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-28 15:09:52,607 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:09:52,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:09:52,607 INFO L82 PathProgramCache]: Analyzing trace with hash 865988245, now seen corresponding path program 17 times [2020-10-28 15:09:52,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:09:52,608 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1457717566] [2020-10-28 15:09:52,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:09:52,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:09:52,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:52,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:55,303 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:09:55,303 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-28 15:09:55,303 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:09:55,303 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2679 [2020-10-28 15:09:55,304 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:09:55,304 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:09:55,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-28 15:09:55,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:09:55,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-28 15:09:55,304 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:09:55,597 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:09:55,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:09:55,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:55,604 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:09:55,605 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:09:55,605 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:09:55,605 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:09:55,605 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:09:55,605 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:09:55,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:09:55,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:09:55,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:09:55,606 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:09:55,612 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 156 proven. 132 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-28 15:09:55,613 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1457717566] [2020-10-28 15:09:55,613 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:09:55,613 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-28 15:09:55,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054740743] [2020-10-28 15:09:55,614 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-28 15:09:55,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:09:55,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-28 15:09:55,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2020-10-28 15:09:55,615 INFO L87 Difference]: Start difference. First operand 49 states and 56 transitions. Second operand 15 states. [2020-10-28 15:09:56,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:09:56,571 INFO L93 Difference]: Finished difference Result 72 states and 87 transitions. [2020-10-28 15:09:56,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-28 15:09:56,572 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 48 [2020-10-28 15:09:56,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:09:56,573 INFO L225 Difference]: With dead ends: 72 [2020-10-28 15:09:56,573 INFO L226 Difference]: Without dead ends: 51 [2020-10-28 15:09:56,575 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=108, Invalid=594, Unknown=0, NotChecked=0, Total=702 [2020-10-28 15:09:56,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-28 15:09:56,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-10-28 15:09:56,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-28 15:09:56,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 58 transitions. [2020-10-28 15:09:56,594 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 58 transitions. Word has length 48 [2020-10-28 15:09:56,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:09:56,594 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 58 transitions. [2020-10-28 15:09:56,594 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-28 15:09:56,595 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 58 transitions. [2020-10-28 15:09:56,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-28 15:09:56,595 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:09:56,595 INFO L422 BasicCegarLoop]: trace histogram [19, 12, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:09:56,596 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-28 15:09:56,596 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:09:56,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:09:56,596 INFO L82 PathProgramCache]: Analyzing trace with hash -681445064, now seen corresponding path program 18 times [2020-10-28 15:09:56,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:09:56,597 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [496341846] [2020-10-28 15:09:56,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:09:56,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:09:56,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:56,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:58,901 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:09:58,901 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-28 15:09:58,901 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:09:58,902 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2290 [2020-10-28 15:09:58,902 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:09:58,902 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:09:58,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 15:09:58,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:09:58,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-28 15:09:58,902 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:09:59,227 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:09:59,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:09:59,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:59,233 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:09:59,233 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:09:59,233 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:09:59,233 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:09:59,234 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:09:59,234 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:09:59,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:09:59,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:09:59,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:09:59,234 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:09:59,241 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 169 proven. 156 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-28 15:09:59,241 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [496341846] [2020-10-28 15:09:59,241 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:09:59,241 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-28 15:09:59,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353058451] [2020-10-28 15:09:59,242 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-28 15:09:59,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:09:59,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-28 15:09:59,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2020-10-28 15:09:59,243 INFO L87 Difference]: Start difference. First operand 51 states and 58 transitions. Second operand 16 states. [2020-10-28 15:10:00,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:10:00,222 INFO L93 Difference]: Finished difference Result 74 states and 89 transitions. [2020-10-28 15:10:00,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-28 15:10:00,222 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 50 [2020-10-28 15:10:00,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:10:00,223 INFO L225 Difference]: With dead ends: 74 [2020-10-28 15:10:00,224 INFO L226 Difference]: Without dead ends: 53 [2020-10-28 15:10:00,225 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=117, Invalid=695, Unknown=0, NotChecked=0, Total=812 [2020-10-28 15:10:00,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-28 15:10:00,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2020-10-28 15:10:00,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-28 15:10:00,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 60 transitions. [2020-10-28 15:10:00,249 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 60 transitions. Word has length 50 [2020-10-28 15:10:00,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:10:00,250 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 60 transitions. [2020-10-28 15:10:00,250 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-28 15:10:00,250 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 60 transitions. [2020-10-28 15:10:00,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-28 15:10:00,252 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:10:00,252 INFO L422 BasicCegarLoop]: trace histogram [20, 13, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:10:00,252 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-28 15:10:00,252 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:10:00,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:10:00,253 INFO L82 PathProgramCache]: Analyzing trace with hash -1706170597, now seen corresponding path program 19 times [2020-10-28 15:10:00,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:10:00,256 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2108001065] [2020-10-28 15:10:00,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:10:00,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:10:00,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:00,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:02,497 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:10:02,497 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-28 15:10:02,497 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:10:02,497 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2225 [2020-10-28 15:10:02,497 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:10:02,498 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:10:02,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 15:10:02,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 37 [2020-10-28 15:10:02,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 15:10:02,498 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:10:03,033 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:10:03,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:10:03,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:03,039 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:10:03,039 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:10:03,039 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:10:03,040 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:10:03,040 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:10:03,040 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:10:03,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:10:03,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:10:03,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:10:03,040 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:10:03,058 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 195 proven. 49 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2020-10-28 15:10:03,058 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2108001065] [2020-10-28 15:10:03,060 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:10:03,060 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 15:10:03,060 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594320859] [2020-10-28 15:10:03,060 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 15:10:03,060 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:10:03,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 15:10:03,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-28 15:10:03,064 INFO L87 Difference]: Start difference. First operand 53 states and 60 transitions. Second operand 11 states. [2020-10-28 15:10:04,102 WARN L193 SmtUtils]: Spent 390.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 49 [2020-10-28 15:10:07,020 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 49 [2020-10-28 15:10:07,417 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 49 [2020-10-28 15:10:14,707 WARN L193 SmtUtils]: Spent 1.85 s on a formula simplification. DAG size of input: 63 DAG size of output: 49 [2020-10-28 15:10:24,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:10:24,422 INFO L93 Difference]: Finished difference Result 64 states and 74 transitions. [2020-10-28 15:10:24,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 15:10:24,424 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 52 [2020-10-28 15:10:24,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:10:24,424 INFO L225 Difference]: With dead ends: 64 [2020-10-28 15:10:24,425 INFO L226 Difference]: Without dead ends: 58 [2020-10-28 15:10:24,427 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 14.1s TimeCoverageRelationStatistics Valid=121, Invalid=258, Unknown=1, NotChecked=0, Total=380 [2020-10-28 15:10:24,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-28 15:10:24,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 55. [2020-10-28 15:10:24,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-28 15:10:24,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 63 transitions. [2020-10-28 15:10:24,445 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 63 transitions. Word has length 52 [2020-10-28 15:10:24,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:10:24,445 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 63 transitions. [2020-10-28 15:10:24,445 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 15:10:24,445 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 63 transitions. [2020-10-28 15:10:24,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-28 15:10:24,446 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:10:24,446 INFO L422 BasicCegarLoop]: trace histogram [21, 13, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:10:24,446 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-28 15:10:24,447 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:10:24,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:10:24,447 INFO L82 PathProgramCache]: Analyzing trace with hash 1797772096, now seen corresponding path program 20 times [2020-10-28 15:10:24,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:10:24,447 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2002645810] [2020-10-28 15:10:24,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:10:24,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:10:24,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:24,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:26,755 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:10:26,755 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-28 15:10:26,755 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:10:26,755 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2292 [2020-10-28 15:10:26,755 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:10:26,755 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:10:26,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-28 15:10:26,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:10:26,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-28 15:10:26,756 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:10:27,120 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:10:27,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:10:27,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:27,126 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:10:27,127 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:10:27,127 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:10:27,127 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:10:27,127 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:10:27,127 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:10:27,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:10:27,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:10:27,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:10:27,128 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:10:27,136 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 210 proven. 182 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-10-28 15:10:27,136 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2002645810] [2020-10-28 15:10:27,136 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:10:27,136 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-28 15:10:27,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240013948] [2020-10-28 15:10:27,137 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-28 15:10:27,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:10:27,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-28 15:10:27,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2020-10-28 15:10:27,138 INFO L87 Difference]: Start difference. First operand 55 states and 63 transitions. Second operand 17 states. [2020-10-28 15:10:28,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:10:28,355 INFO L93 Difference]: Finished difference Result 80 states and 97 transitions. [2020-10-28 15:10:28,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-28 15:10:28,356 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 54 [2020-10-28 15:10:28,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:10:28,357 INFO L225 Difference]: With dead ends: 80 [2020-10-28 15:10:28,357 INFO L226 Difference]: Without dead ends: 57 [2020-10-28 15:10:28,358 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=126, Invalid=804, Unknown=0, NotChecked=0, Total=930 [2020-10-28 15:10:28,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-28 15:10:28,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-10-28 15:10:28,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-28 15:10:28,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 65 transitions. [2020-10-28 15:10:28,369 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 65 transitions. Word has length 54 [2020-10-28 15:10:28,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:10:28,369 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 65 transitions. [2020-10-28 15:10:28,369 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-28 15:10:28,369 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 65 transitions. [2020-10-28 15:10:28,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-28 15:10:28,369 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:10:28,370 INFO L422 BasicCegarLoop]: trace histogram [22, 14, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:10:28,370 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-28 15:10:28,370 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:10:28,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:10:28,370 INFO L82 PathProgramCache]: Analyzing trace with hash -657188957, now seen corresponding path program 21 times [2020-10-28 15:10:28,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:10:28,371 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [614647658] [2020-10-28 15:10:28,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:10:28,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:10:28,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:28,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:31,106 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:10:31,106 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-28 15:10:31,107 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:10:31,107 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2720 [2020-10-28 15:10:31,107 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:10:31,107 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:10:31,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-28 15:10:31,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:10:31,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-28 15:10:31,107 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:10:31,524 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:10:31,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:10:31,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:31,529 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:10:31,529 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:10:31,530 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:10:31,530 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:10:31,530 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:10:31,530 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:10:31,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:10:31,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:10:31,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:10:31,530 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:10:31,538 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 225 proven. 210 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-10-28 15:10:31,539 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [614647658] [2020-10-28 15:10:31,539 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:10:31,539 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-28 15:10:31,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186507112] [2020-10-28 15:10:31,540 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-28 15:10:31,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:10:31,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-28 15:10:31,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2020-10-28 15:10:31,541 INFO L87 Difference]: Start difference. First operand 57 states and 65 transitions. Second operand 18 states. [2020-10-28 15:10:32,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:10:32,788 INFO L93 Difference]: Finished difference Result 82 states and 99 transitions. [2020-10-28 15:10:32,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-28 15:10:32,789 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 56 [2020-10-28 15:10:32,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:10:32,790 INFO L225 Difference]: With dead ends: 82 [2020-10-28 15:10:32,790 INFO L226 Difference]: Without dead ends: 59 [2020-10-28 15:10:32,791 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=135, Invalid=921, Unknown=0, NotChecked=0, Total=1056 [2020-10-28 15:10:32,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-28 15:10:32,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2020-10-28 15:10:32,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-28 15:10:32,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 67 transitions. [2020-10-28 15:10:32,802 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 67 transitions. Word has length 56 [2020-10-28 15:10:32,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:10:32,802 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 67 transitions. [2020-10-28 15:10:32,802 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-28 15:10:32,803 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 67 transitions. [2020-10-28 15:10:32,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-28 15:10:32,803 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:10:32,803 INFO L422 BasicCegarLoop]: trace histogram [23, 15, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:10:32,803 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-28 15:10:32,804 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:10:32,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:10:32,804 INFO L82 PathProgramCache]: Analyzing trace with hash -1937715386, now seen corresponding path program 22 times [2020-10-28 15:10:32,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:10:32,804 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [818667524] [2020-10-28 15:10:32,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:10:32,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:10:32,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:32,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:35,695 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:10:35,695 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-28 15:10:35,695 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:10:35,695 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2867 [2020-10-28 15:10:35,695 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:10:35,695 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:10:35,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 15:10:35,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 41 [2020-10-28 15:10:35,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-28 15:10:35,696 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:10:35,983 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:10:35,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:10:35,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:35,988 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:10:35,988 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:10:35,988 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:10:35,989 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:10:35,989 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:10:35,989 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:10:35,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:10:35,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:10:35,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:10:35,989 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:10:35,995 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 255 proven. 64 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2020-10-28 15:10:35,995 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [818667524] [2020-10-28 15:10:35,995 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:10:35,995 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 15:10:35,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340918610] [2020-10-28 15:10:35,996 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 15:10:35,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:10:35,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 15:10:35,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-10-28 15:10:35,997 INFO L87 Difference]: Start difference. First operand 59 states and 67 transitions. Second operand 12 states. [2020-10-28 15:10:38,784 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 47 [2020-10-28 15:10:39,497 WARN L193 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 47 [2020-10-28 15:10:39,887 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 47 [2020-10-28 15:10:42,259 WARN L193 SmtUtils]: Spent 2.26 s on a formula simplification. DAG size of input: 82 DAG size of output: 47 [2020-10-28 15:10:43,648 WARN L193 SmtUtils]: Spent 847.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 47 [2020-10-28 15:10:44,647 WARN L193 SmtUtils]: Spent 861.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 47 [2020-10-28 15:10:47,269 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 47 [2020-10-28 15:10:49,596 WARN L193 SmtUtils]: Spent 2.11 s on a formula simplification that was a NOOP. DAG size: 54 [2020-10-28 15:10:58,990 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 47 [2020-10-28 15:10:59,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:10:59,066 INFO L93 Difference]: Finished difference Result 75 states and 88 transitions. [2020-10-28 15:10:59,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-28 15:10:59,067 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 58 [2020-10-28 15:10:59,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:10:59,067 INFO L225 Difference]: With dead ends: 75 [2020-10-28 15:10:59,067 INFO L226 Difference]: Without dead ends: 69 [2020-10-28 15:10:59,068 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 11.7s TimeCoverageRelationStatistics Valid=196, Invalid=403, Unknown=1, NotChecked=0, Total=600 [2020-10-28 15:10:59,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-28 15:10:59,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 61. [2020-10-28 15:10:59,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-28 15:10:59,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 70 transitions. [2020-10-28 15:10:59,077 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 70 transitions. Word has length 58 [2020-10-28 15:10:59,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:10:59,078 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 70 transitions. [2020-10-28 15:10:59,078 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 15:10:59,078 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 70 transitions. [2020-10-28 15:10:59,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-28 15:10:59,078 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:10:59,079 INFO L422 BasicCegarLoop]: trace histogram [24, 15, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:10:59,079 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-28 15:10:59,079 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:10:59,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:10:59,079 INFO L82 PathProgramCache]: Analyzing trace with hash -1673438037, now seen corresponding path program 23 times [2020-10-28 15:10:59,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:10:59,080 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [284343459] [2020-10-28 15:10:59,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:10:59,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:10:59,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:59,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:02,052 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:11:02,053 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-28 15:11:02,053 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:11:02,053 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2956 [2020-10-28 15:11:02,053 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:11:02,053 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:11:02,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-28 15:11:02,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:11:02,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-28 15:11:02,053 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:11:02,492 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:11:02,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:11:02,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:02,500 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:11:02,500 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:11:02,501 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:11:02,501 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 15:11:02,501 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:11:02,501 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:11:02,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:11:02,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:11:02,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:11:02,502 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:11:02,511 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 272 proven. 240 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-10-28 15:11:02,512 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [284343459] [2020-10-28 15:11:02,512 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:11:02,512 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-28 15:11:02,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078239738] [2020-10-28 15:11:02,514 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-28 15:11:02,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:11:02,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-28 15:11:02,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2020-10-28 15:11:02,515 INFO L87 Difference]: Start difference. First operand 61 states and 70 transitions. Second operand 19 states. [2020-10-28 15:11:03,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:11:03,994 INFO L93 Difference]: Finished difference Result 88 states and 107 transitions. [2020-10-28 15:11:03,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-28 15:11:03,995 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 60 [2020-10-28 15:11:03,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:11:03,996 INFO L225 Difference]: With dead ends: 88 [2020-10-28 15:11:03,996 INFO L226 Difference]: Without dead ends: 63 [2020-10-28 15:11:03,998 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=144, Invalid=1046, Unknown=0, NotChecked=0, Total=1190 [2020-10-28 15:11:03,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-28 15:11:04,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2020-10-28 15:11:04,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-28 15:11:04,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 72 transitions. [2020-10-28 15:11:04,010 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 72 transitions. Word has length 60 [2020-10-28 15:11:04,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:11:04,010 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 72 transitions. [2020-10-28 15:11:04,011 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-28 15:11:04,011 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 72 transitions. [2020-10-28 15:11:04,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-28 15:11:04,011 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:11:04,011 INFO L422 BasicCegarLoop]: trace histogram [25, 16, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:11:04,011 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-28 15:11:04,012 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:11:04,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:11:04,012 INFO L82 PathProgramCache]: Analyzing trace with hash -1246524722, now seen corresponding path program 24 times [2020-10-28 15:11:04,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:11:04,012 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [74608495] [2020-10-28 15:11:04,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:11:04,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:11:04,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:04,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:07,405 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:11:07,406 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-28 15:11:07,406 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:11:07,406 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3377 [2020-10-28 15:11:07,406 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:11:07,406 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:11:07,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 15:11:07,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-28 15:11:07,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-28 15:11:07,406 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:11:08,276 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:11:08,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:11:08,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:08,282 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:11:08,282 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:11:08,282 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:11:08,282 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:11:08,283 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:11:08,283 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:11:08,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:11:08,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:11:08,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:11:08,283 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:11:08,292 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 304 proven. 81 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2020-10-28 15:11:08,293 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [74608495] [2020-10-28 15:11:08,293 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:11:08,293 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 15:11:08,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164259601] [2020-10-28 15:11:08,294 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 15:11:08,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:11:08,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 15:11:08,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-10-28 15:11:08,294 INFO L87 Difference]: Start difference. First operand 63 states and 72 transitions. Second operand 13 states. [2020-10-28 15:11:09,165 WARN L193 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 49 [2020-10-28 15:11:14,399 WARN L193 SmtUtils]: Spent 2.36 s on a formula simplification. DAG size of input: 91 DAG size of output: 49 [2020-10-28 15:11:17,114 WARN L193 SmtUtils]: Spent 2.54 s on a formula simplification. DAG size of input: 84 DAG size of output: 49 [2020-10-28 15:11:24,651 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 49 [2020-10-28 15:11:25,692 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 49 [2020-10-28 15:11:34,864 WARN L193 SmtUtils]: Spent 311.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 49 [2020-10-28 15:11:44,100 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 49 [2020-10-28 15:11:53,201 WARN L193 SmtUtils]: Spent 2.36 s on a formula simplification. DAG size of input: 91 DAG size of output: 49 [2020-10-28 15:11:57,588 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 49 [2020-10-28 15:12:06,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:12:06,976 INFO L93 Difference]: Finished difference Result 76 states and 88 transitions. [2020-10-28 15:12:06,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-28 15:12:06,977 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 62 [2020-10-28 15:12:06,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:12:06,978 INFO L225 Difference]: With dead ends: 76 [2020-10-28 15:12:06,978 INFO L226 Difference]: Without dead ends: 70 [2020-10-28 15:12:06,978 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 37.5s TimeCoverageRelationStatistics Valid=216, Invalid=427, Unknown=7, NotChecked=0, Total=650 [2020-10-28 15:12:06,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-28 15:12:06,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 65. [2020-10-28 15:12:06,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-28 15:12:06,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 75 transitions. [2020-10-28 15:12:06,998 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 75 transitions. Word has length 62 [2020-10-28 15:12:06,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:12:06,999 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 75 transitions. [2020-10-28 15:12:06,999 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 15:12:06,999 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 75 transitions. [2020-10-28 15:12:06,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-28 15:12:06,999 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:12:07,000 INFO L422 BasicCegarLoop]: trace histogram [26, 16, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:12:07,000 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-28 15:12:07,000 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:12:07,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:12:07,000 INFO L82 PathProgramCache]: Analyzing trace with hash 1135826483, now seen corresponding path program 25 times [2020-10-28 15:12:07,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:12:07,001 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [157392187] [2020-10-28 15:12:07,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:12:07,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:12:07,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:07,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:11,945 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:12:11,945 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-28 15:12:11,946 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:12:11,946 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4927 [2020-10-28 15:12:11,946 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:12:11,946 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:12:11,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-28 15:12:11,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:12:11,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-28 15:12:11,946 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:12:12,429 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:12:12,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:12:12,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:12,436 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:12:12,436 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:12:12,436 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:12:12,436 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:12:12,437 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:12:12,437 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:12:12,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:12:12,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:12:12,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:12:12,437 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:12:12,453 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 323 proven. 272 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-10-28 15:12:12,453 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [157392187] [2020-10-28 15:12:12,453 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:12:12,454 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-28 15:12:12,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946585958] [2020-10-28 15:12:12,456 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-28 15:12:12,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:12:12,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-28 15:12:12,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2020-10-28 15:12:12,462 INFO L87 Difference]: Start difference. First operand 65 states and 75 transitions. Second operand 20 states. [2020-10-28 15:12:14,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:12:14,035 INFO L93 Difference]: Finished difference Result 94 states and 115 transitions. [2020-10-28 15:12:14,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-28 15:12:14,036 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 64 [2020-10-28 15:12:14,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:12:14,037 INFO L225 Difference]: With dead ends: 94 [2020-10-28 15:12:14,037 INFO L226 Difference]: Without dead ends: 67 [2020-10-28 15:12:14,039 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=153, Invalid=1179, Unknown=0, NotChecked=0, Total=1332 [2020-10-28 15:12:14,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-28 15:12:14,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2020-10-28 15:12:14,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-28 15:12:14,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 77 transitions. [2020-10-28 15:12:14,052 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 77 transitions. Word has length 64 [2020-10-28 15:12:14,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:12:14,052 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 77 transitions. [2020-10-28 15:12:14,052 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-28 15:12:14,052 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 77 transitions. [2020-10-28 15:12:14,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-28 15:12:14,053 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:12:14,053 INFO L422 BasicCegarLoop]: trace histogram [27, 17, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:12:14,053 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-28 15:12:14,053 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:12:14,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:12:14,054 INFO L82 PathProgramCache]: Analyzing trace with hash -565462314, now seen corresponding path program 26 times [2020-10-28 15:12:14,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:12:14,054 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1761850291] [2020-10-28 15:12:14,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:12:14,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:12:14,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:14,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:19,074 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:12:19,074 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-28 15:12:19,074 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:12:19,075 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-28 15:12:19,075 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:12:19,075 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:12:19,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-28 15:12:19,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:12:19,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-28 15:12:19,075 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:12:19,604 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:12:19,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:12:19,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:19,608 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:12:19,608 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:12:19,609 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:12:19,609 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:12:19,609 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:12:19,609 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:12:19,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:12:19,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:12:19,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:12:19,609 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:12:19,616 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 342 proven. 306 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-10-28 15:12:19,616 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1761850291] [2020-10-28 15:12:19,617 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:12:19,617 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-28 15:12:19,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798970341] [2020-10-28 15:12:19,617 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-28 15:12:19,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:12:19,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-28 15:12:19,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2020-10-28 15:12:19,618 INFO L87 Difference]: Start difference. First operand 67 states and 77 transitions. Second operand 21 states. [2020-10-28 15:12:21,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:12:21,374 INFO L93 Difference]: Finished difference Result 96 states and 117 transitions. [2020-10-28 15:12:21,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-28 15:12:21,375 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 66 [2020-10-28 15:12:21,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:12:21,376 INFO L225 Difference]: With dead ends: 96 [2020-10-28 15:12:21,376 INFO L226 Difference]: Without dead ends: 69 [2020-10-28 15:12:21,377 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=162, Invalid=1320, Unknown=0, NotChecked=0, Total=1482 [2020-10-28 15:12:21,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-28 15:12:21,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2020-10-28 15:12:21,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-28 15:12:21,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 79 transitions. [2020-10-28 15:12:21,388 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 79 transitions. Word has length 66 [2020-10-28 15:12:21,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:12:21,389 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 79 transitions. [2020-10-28 15:12:21,389 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-28 15:12:21,389 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 79 transitions. [2020-10-28 15:12:21,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-28 15:12:21,389 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:12:21,389 INFO L422 BasicCegarLoop]: trace histogram [28, 18, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:12:21,390 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-28 15:12:21,390 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:12:21,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:12:21,390 INFO L82 PathProgramCache]: Analyzing trace with hash 878543545, now seen corresponding path program 27 times [2020-10-28 15:12:21,390 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:12:21,391 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1582574174] [2020-10-28 15:12:21,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:12:21,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:12:21,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:21,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:25,264 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:12:25,265 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-28 15:12:25,265 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:12:25,265 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3857 [2020-10-28 15:12:25,265 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:12:25,265 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:12:25,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 15:12:25,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 47 [2020-10-28 15:12:25,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-28 15:12:25,266 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:12:28,414 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:12:28,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:12:28,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:28,419 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:12:28,419 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:12:28,419 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:12:28,419 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:12:28,419 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:12:28,419 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:12:28,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:12:28,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:12:28,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:12:28,420 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:12:28,429 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 378 proven. 98 refuted. 2 times theorem prover too weak. 306 trivial. 0 not checked. [2020-10-28 15:12:28,429 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1582574174] [2020-10-28 15:12:28,430 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:12:28,430 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 15:12:28,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834242992] [2020-10-28 15:12:28,430 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 15:12:28,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:12:28,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 15:12:28,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=146, Unknown=1, NotChecked=0, Total=182 [2020-10-28 15:12:28,431 INFO L87 Difference]: Start difference. First operand 69 states and 79 transitions. Second operand 14 states. [2020-10-28 15:12:36,304 WARN L193 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 47 [2020-10-28 15:12:37,901 WARN L193 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 47 [2020-10-28 15:12:43,328 WARN L193 SmtUtils]: Spent 2.62 s on a formula simplification. DAG size of input: 82 DAG size of output: 47 [2020-10-28 15:12:44,142 WARN L193 SmtUtils]: Spent 601.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 47 [2020-10-28 15:12:46,459 WARN L193 SmtUtils]: Spent 410.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 47 [2020-10-28 15:12:47,178 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 47 [2020-10-28 15:12:50,500 WARN L193 SmtUtils]: Spent 3.15 s on a formula simplification. DAG size of input: 103 DAG size of output: 47 [2020-10-28 15:12:51,674 WARN L193 SmtUtils]: Spent 453.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 47 [2020-10-28 15:12:57,042 WARN L193 SmtUtils]: Spent 2.32 s on a formula simplification. DAG size of input: 75 DAG size of output: 47 [2020-10-28 15:13:04,400 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 47 [2020-10-28 15:13:05,051 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 47