/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=DEEPEST --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/in-de51.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 20:23:50,861 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 20:23:50,864 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 20:23:50,905 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 20:23:50,905 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 20:23:50,907 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 20:23:50,908 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 20:23:50,911 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 20:23:50,913 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 20:23:50,914 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 20:23:50,916 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 20:23:50,917 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 20:23:50,918 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 20:23:50,919 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 20:23:50,920 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 20:23:50,922 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 20:23:50,923 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 20:23:50,924 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 20:23:50,927 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 20:23:50,929 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 20:23:50,931 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 20:23:50,935 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 20:23:50,936 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 20:23:50,953 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 20:23:50,957 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 20:23:50,957 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 20:23:50,958 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 20:23:50,959 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 20:23:50,960 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 20:23:50,961 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 20:23:50,961 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 20:23:50,962 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 20:23:50,963 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 20:23:50,964 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 20:23:50,965 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 20:23:50,966 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 20:23:50,967 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 20:23:50,967 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 20:23:50,967 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 20:23:50,969 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 20:23:50,969 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 20:23:50,971 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-27 20:23:50,998 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 20:23:50,998 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 20:23:51,000 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 20:23:51,000 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 20:23:51,001 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 20:23:51,001 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 20:23:51,001 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 20:23:51,002 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 20:23:51,002 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 20:23:51,002 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 20:23:51,002 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 20:23:51,003 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 20:23:51,003 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 20:23:51,003 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 20:23:51,003 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 20:23:51,003 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 20:23:51,004 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 20:23:51,004 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 20:23:51,004 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 20:23:51,004 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 20:23:51,005 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 20:23:51,005 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 20:23:51,005 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 20:23:51,005 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 20:23:51,006 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 20:23:51,006 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 20:23:51,006 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 20:23:51,006 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 20:23:51,006 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 20:23:51,007 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 20:23:51,365 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 20:23:51,401 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 20:23:51,405 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 20:23:51,407 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 20:23:51,407 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 20:23:51,410 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/in-de51.c [2020-10-27 20:23:51,494 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1483b661d/af95f53df08e40f4841e7195e69438bb/FLAGc6594e204 [2020-10-27 20:23:52,082 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 20:23:52,084 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops-crafted-1/in-de51.c [2020-10-27 20:23:52,091 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1483b661d/af95f53df08e40f4841e7195e69438bb/FLAGc6594e204 [2020-10-27 20:23:52,434 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1483b661d/af95f53df08e40f4841e7195e69438bb [2020-10-27 20:23:52,439 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 20:23:52,447 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 20:23:52,449 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 20:23:52,449 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 20:23:52,453 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 20:23:52,461 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 08:23:52" (1/1) ... [2020-10-27 20:23:52,469 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@32adb26b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:23:52, skipping insertion in model container [2020-10-27 20:23:52,469 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 08:23:52" (1/1) ... [2020-10-27 20:23:52,477 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 20:23:52,493 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 20:23:52,656 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 20:23:52,667 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 20:23:52,687 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 20:23:52,703 INFO L208 MainTranslator]: Completed translation [2020-10-27 20:23:52,704 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:23:52 WrapperNode [2020-10-27 20:23:52,704 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 20:23:52,705 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 20:23:52,706 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 20:23:52,706 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 20:23:52,719 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:23:52" (1/1) ... [2020-10-27 20:23:52,720 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:23:52" (1/1) ... [2020-10-27 20:23:52,728 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:23:52" (1/1) ... [2020-10-27 20:23:52,728 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:23:52" (1/1) ... [2020-10-27 20:23:52,735 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:23:52" (1/1) ... [2020-10-27 20:23:52,740 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:23:52" (1/1) ... [2020-10-27 20:23:52,742 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:23:52" (1/1) ... [2020-10-27 20:23:52,744 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 20:23:52,745 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 20:23:52,745 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 20:23:52,746 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 20:23:52,746 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:23:52" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 20:23:52,831 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 20:23:52,831 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 20:23:52,832 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 20:23:52,833 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-27 20:23:52,833 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 20:23:52,834 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 20:23:52,834 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 20:23:52,835 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 20:23:52,835 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 20:23:52,835 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-10-27 20:23:52,836 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-27 20:23:52,836 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 20:23:52,836 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 20:23:52,837 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 20:23:52,837 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 20:23:52,838 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 20:23:52,838 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 20:23:52,838 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 20:23:53,295 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 20:23:53,296 INFO L298 CfgBuilder]: Removed 5 assume(true) statements. [2020-10-27 20:23:53,297 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 08:23:53 BoogieIcfgContainer [2020-10-27 20:23:53,298 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 20:23:53,299 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 20:23:53,300 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 20:23:53,303 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 20:23:53,303 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 08:23:52" (1/3) ... [2020-10-27 20:23:53,304 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ee198b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 08:23:53, skipping insertion in model container [2020-10-27 20:23:53,304 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:23:52" (2/3) ... [2020-10-27 20:23:53,305 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ee198b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 08:23:53, skipping insertion in model container [2020-10-27 20:23:53,305 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 08:23:53" (3/3) ... [2020-10-27 20:23:53,307 INFO L111 eAbstractionObserver]: Analyzing ICFG in-de51.c [2020-10-27 20:23:53,319 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 20:23:53,324 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 20:23:53,337 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 20:23:53,364 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 20:23:53,365 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 20:23:53,365 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 20:23:53,365 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 20:23:53,365 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 20:23:53,366 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 20:23:53,366 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 20:23:53,366 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 20:23:53,383 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states. [2020-10-27 20:23:53,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-27 20:23:53,389 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:23:53,390 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:23:53,390 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:23:53,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:23:53,397 INFO L82 PathProgramCache]: Analyzing trace with hash 2036788406, now seen corresponding path program 1 times [2020-10-27 20:23:53,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:23:53,407 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [215246789] [2020-10-27 20:23:53,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:23:53,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:23:53,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:53,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:54,020 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:23:54,021 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-27 20:23:54,021 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:23:54,021 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 477 [2020-10-27 20:23:54,027 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:23:54,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:23:54,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-27 20:23:54,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:23:54,028 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-10-27 20:23:54,148 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:23:54,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:23:54,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:54,185 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:23:54,186 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:23:54,186 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:23:54,186 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-27 20:23:54,186 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:23:54,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:23:54,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:23:54,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:23:54,190 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-27 20:23:54,216 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:23:54,221 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [215246789] [2020-10-27 20:23:54,224 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:23:54,226 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-27 20:23:54,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422487103] [2020-10-27 20:23:54,233 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-27 20:23:54,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:23:54,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-27 20:23:54,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-27 20:23:54,260 INFO L87 Difference]: Start difference. First operand 28 states. Second operand 3 states. [2020-10-27 20:23:54,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:23:54,360 INFO L93 Difference]: Finished difference Result 46 states and 66 transitions. [2020-10-27 20:23:54,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-27 20:23:54,362 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-10-27 20:23:54,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:23:54,371 INFO L225 Difference]: With dead ends: 46 [2020-10-27 20:23:54,371 INFO L226 Difference]: Without dead ends: 18 [2020-10-27 20:23:54,375 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-27 20:23:54,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-10-27 20:23:54,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-10-27 20:23:54,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-10-27 20:23:54,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2020-10-27 20:23:54,445 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 17 [2020-10-27 20:23:54,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:23:54,446 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2020-10-27 20:23:54,446 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-27 20:23:54,446 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2020-10-27 20:23:54,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-27 20:23:54,447 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:23:54,447 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:23:54,447 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 20:23:54,448 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:23:54,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:23:54,449 INFO L82 PathProgramCache]: Analyzing trace with hash -1513226318, now seen corresponding path program 1 times [2020-10-27 20:23:54,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:23:54,449 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [655376642] [2020-10-27 20:23:54,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:23:54,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:23:54,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:54,642 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:23:54,642 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-27 20:23:54,642 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:23:54,642 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 170 [2020-10-27 20:23:54,643 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:23:54,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 20:23:54,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:23:54,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 20:23:54,645 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 20:23:54,871 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:23:54,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:23:54,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:54,885 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:23:54,886 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:23:54,886 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:23:54,886 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 20:23:54,886 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:23:54,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:23:54,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:23:54,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:23:54,887 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:23:54,895 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:23:54,896 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [655376642] [2020-10-27 20:23:54,896 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:23:54,897 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 20:23:54,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933600282] [2020-10-27 20:23:54,898 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 20:23:54,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:23:54,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 20:23:54,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 20:23:54,900 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand 6 states. [2020-10-27 20:23:55,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:23:55,176 INFO L93 Difference]: Finished difference Result 30 states and 38 transitions. [2020-10-27 20:23:55,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 20:23:55,177 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2020-10-27 20:23:55,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:23:55,178 INFO L225 Difference]: With dead ends: 30 [2020-10-27 20:23:55,178 INFO L226 Difference]: Without dead ends: 24 [2020-10-27 20:23:55,180 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-10-27 20:23:55,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-10-27 20:23:55,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-10-27 20:23:55,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-27 20:23:55,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 32 transitions. [2020-10-27 20:23:55,189 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 32 transitions. Word has length 17 [2020-10-27 20:23:55,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:23:55,190 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 32 transitions. [2020-10-27 20:23:55,190 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 20:23:55,190 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 32 transitions. [2020-10-27 20:23:55,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-27 20:23:55,191 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:23:55,191 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:23:55,191 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 20:23:55,191 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:23:55,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:23:55,192 INFO L82 PathProgramCache]: Analyzing trace with hash 1403961586, now seen corresponding path program 1 times [2020-10-27 20:23:55,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:23:55,193 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [425632766] [2020-10-27 20:23:55,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:23:55,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:23:55,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:55,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:55,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:55,559 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:23:55,559 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-27 20:23:55,559 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:23:55,560 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 353 [2020-10-27 20:23:55,560 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:23:55,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 20:23:55,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 20:23:55,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-27 20:23:55,560 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:23:55,618 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:23:55,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:23:55,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:55,636 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:23:55,637 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:23:55,637 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:23:55,637 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 20:23:55,637 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:23:55,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:23:55,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:23:55,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:23:55,642 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-27 20:23:55,649 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:23:55,653 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [425632766] [2020-10-27 20:23:55,653 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:23:55,654 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 20:23:55,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133117616] [2020-10-27 20:23:55,655 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 20:23:55,655 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:23:55,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 20:23:55,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 20:23:55,656 INFO L87 Difference]: Start difference. First operand 24 states and 32 transitions. Second operand 4 states. [2020-10-27 20:23:55,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:23:55,758 INFO L93 Difference]: Finished difference Result 37 states and 50 transitions. [2020-10-27 20:23:55,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 20:23:55,759 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2020-10-27 20:23:55,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:23:55,760 INFO L225 Difference]: With dead ends: 37 [2020-10-27 20:23:55,760 INFO L226 Difference]: Without dead ends: 29 [2020-10-27 20:23:55,761 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 [2020-10-27 20:23:55,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-27 20:23:55,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-10-27 20:23:55,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-27 20:23:55,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 40 transitions. [2020-10-27 20:23:55,770 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 40 transitions. Word has length 18 [2020-10-27 20:23:55,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:23:55,770 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 40 transitions. [2020-10-27 20:23:55,770 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 20:23:55,771 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 40 transitions. [2020-10-27 20:23:55,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-27 20:23:55,772 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:23:55,772 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:23:55,773 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 20:23:55,773 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:23:55,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:23:55,774 INFO L82 PathProgramCache]: Analyzing trace with hash 1941968995, now seen corresponding path program 1 times [2020-10-27 20:23:55,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:23:55,775 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2017618850] [2020-10-27 20:23:55,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:23:55,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:23:55,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:55,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:56,008 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:23:56,009 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-27 20:23:56,009 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:23:56,009 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 213 [2020-10-27 20:23:56,009 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:23:56,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 20:23:56,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 20:23:56,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-27 20:23:56,010 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:23:56,054 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:23:56,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:23:56,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:56,063 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:23:56,063 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:23:56,064 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:23:56,064 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 20:23:56,064 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:23:56,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:23:56,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:23:56,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:23:56,065 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:23:56,070 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:23:56,070 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2017618850] [2020-10-27 20:23:56,070 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:23:56,071 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 20:23:56,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071254455] [2020-10-27 20:23:56,071 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 20:23:56,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:23:56,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 20:23:56,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 20:23:56,073 INFO L87 Difference]: Start difference. First operand 29 states and 40 transitions. Second operand 4 states. [2020-10-27 20:23:56,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:23:56,200 INFO L93 Difference]: Finished difference Result 46 states and 65 transitions. [2020-10-27 20:23:56,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 20:23:56,201 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2020-10-27 20:23:56,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:23:56,204 INFO L225 Difference]: With dead ends: 46 [2020-10-27 20:23:56,204 INFO L226 Difference]: Without dead ends: 35 [2020-10-27 20:23:56,205 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 [2020-10-27 20:23:56,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-27 20:23:56,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2020-10-27 20:23:56,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-27 20:23:56,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 45 transitions. [2020-10-27 20:23:56,215 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 45 transitions. Word has length 18 [2020-10-27 20:23:56,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:23:56,216 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 45 transitions. [2020-10-27 20:23:56,216 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 20:23:56,216 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 45 transitions. [2020-10-27 20:23:56,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-27 20:23:56,217 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:23:56,217 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:23:56,217 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 20:23:56,218 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:23:56,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:23:56,218 INFO L82 PathProgramCache]: Analyzing trace with hash -1225593277, now seen corresponding path program 1 times [2020-10-27 20:23:56,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:23:56,219 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [70160011] [2020-10-27 20:23:56,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:23:56,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:23:56,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:56,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:56,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:56,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:56,647 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:23:56,647 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-27 20:23:56,647 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 20:23:56,647 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 416 [2020-10-27 20:23:56,648 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:23:56,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 20:23:56,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:23:56,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-27 20:23:56,648 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:23:56,710 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:23:56,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:23:56,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:56,719 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:23:56,720 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:23:56,720 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:23:56,720 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 20:23:56,720 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:23:56,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:23:56,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:23:56,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:23:56,721 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:23:56,725 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:23:56,725 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [70160011] [2020-10-27 20:23:56,725 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:23:56,726 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 20:23:56,726 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266825409] [2020-10-27 20:23:56,726 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 20:23:56,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:23:56,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 20:23:56,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 20:23:56,727 INFO L87 Difference]: Start difference. First operand 33 states and 45 transitions. Second operand 5 states. [2020-10-27 20:23:56,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:23:56,891 INFO L93 Difference]: Finished difference Result 41 states and 52 transitions. [2020-10-27 20:23:56,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 20:23:56,892 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2020-10-27 20:23:56,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:23:56,893 INFO L225 Difference]: With dead ends: 41 [2020-10-27 20:23:56,893 INFO L226 Difference]: Without dead ends: 33 [2020-10-27 20:23:56,894 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-27 20:23:56,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-27 20:23:56,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2020-10-27 20:23:56,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-27 20:23:56,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions. [2020-10-27 20:23:56,903 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 18 [2020-10-27 20:23:56,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:23:56,903 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions. [2020-10-27 20:23:56,903 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 20:23:56,903 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions. [2020-10-27 20:23:56,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-27 20:23:56,904 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:23:56,904 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:23:56,905 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 20:23:56,905 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:23:56,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:23:56,905 INFO L82 PathProgramCache]: Analyzing trace with hash -1302000028, now seen corresponding path program 1 times [2020-10-27 20:23:56,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:23:56,906 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2019060398] [2020-10-27 20:23:56,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:23:56,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:23:56,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:56,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:56,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:57,055 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:23:57,055 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-27 20:23:57,056 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:23:57,056 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 139 [2020-10-27 20:23:57,056 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:23:57,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 20:23:57,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:23:57,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-27 20:23:57,057 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:23:57,154 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:23:57,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:23:57,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:57,165 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:23:57,166 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:23:57,166 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:23:57,166 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 20:23:57,167 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:23:57,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:23:57,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:23:57,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:23:57,167 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:23:57,172 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:23:57,172 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2019060398] [2020-10-27 20:23:57,173 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:23:57,173 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 20:23:57,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613082077] [2020-10-27 20:23:57,174 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 20:23:57,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:23:57,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 20:23:57,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 20:23:57,175 INFO L87 Difference]: Start difference. First operand 32 states and 42 transitions. Second operand 6 states. [2020-10-27 20:23:57,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:23:57,466 INFO L93 Difference]: Finished difference Result 60 states and 83 transitions. [2020-10-27 20:23:57,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 20:23:57,467 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2020-10-27 20:23:57,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:23:57,468 INFO L225 Difference]: With dead ends: 60 [2020-10-27 20:23:57,468 INFO L226 Difference]: Without dead ends: 38 [2020-10-27 20:23:57,468 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-10-27 20:23:57,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-27 20:23:57,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 32. [2020-10-27 20:23:57,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-27 20:23:57,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 41 transitions. [2020-10-27 20:23:57,477 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 41 transitions. Word has length 18 [2020-10-27 20:23:57,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:23:57,477 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 41 transitions. [2020-10-27 20:23:57,477 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 20:23:57,477 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 41 transitions. [2020-10-27 20:23:57,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-27 20:23:57,478 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:23:57,478 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:23:57,478 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 20:23:57,479 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:23:57,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:23:57,479 INFO L82 PathProgramCache]: Analyzing trace with hash 951047666, now seen corresponding path program 2 times [2020-10-27 20:23:57,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:23:57,480 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1827989839] [2020-10-27 20:23:57,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:23:57,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:23:57,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:57,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:57,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:57,832 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:23:57,832 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-27 20:23:57,832 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:23:57,832 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 337 [2020-10-27 20:23:57,832 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:23:57,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 20:23:57,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:23:57,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 20:23:57,833 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:23:57,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:23:57,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:23:57,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:57,930 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:23:57,930 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:23:57,930 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:23:57,930 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 20:23:57,931 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:23:57,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:23:57,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:23:57,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:23:57,931 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:23:57,935 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:23:57,936 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1827989839] [2020-10-27 20:23:57,936 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:23:57,936 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 20:23:57,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051000569] [2020-10-27 20:23:57,937 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 20:23:57,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:23:57,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 20:23:57,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 20:23:57,938 INFO L87 Difference]: Start difference. First operand 32 states and 41 transitions. Second operand 6 states. [2020-10-27 20:23:58,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:23:58,200 INFO L93 Difference]: Finished difference Result 55 states and 73 transitions. [2020-10-27 20:23:58,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 20:23:58,201 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2020-10-27 20:23:58,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:23:58,202 INFO L225 Difference]: With dead ends: 55 [2020-10-27 20:23:58,202 INFO L226 Difference]: Without dead ends: 47 [2020-10-27 20:23:58,202 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-27 20:23:58,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-27 20:23:58,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 36. [2020-10-27 20:23:58,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-27 20:23:58,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 47 transitions. [2020-10-27 20:23:58,211 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 47 transitions. Word has length 19 [2020-10-27 20:23:58,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:23:58,211 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 47 transitions. [2020-10-27 20:23:58,211 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 20:23:58,211 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 47 transitions. [2020-10-27 20:23:58,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-27 20:23:58,212 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:23:58,212 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:23:58,212 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 20:23:58,213 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:23:58,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:23:58,213 INFO L82 PathProgramCache]: Analyzing trace with hash -1402946349, now seen corresponding path program 1 times [2020-10-27 20:23:58,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:23:58,214 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1023612548] [2020-10-27 20:23:58,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:23:58,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:23:58,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:58,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:58,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:58,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:58,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:58,647 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:23:58,647 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-27 20:23:58,647 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 20:23:58,648 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 422 [2020-10-27 20:23:58,648 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:23:58,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 20:23:58,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-27 20:23:58,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-27 20:23:58,648 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:23:58,720 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:23:58,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:23:58,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:58,728 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:23:58,729 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:23:58,729 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:23:58,729 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:23:58,729 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:23:58,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:23:58,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:23:58,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:23:58,730 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:23:58,734 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 20:23:58,734 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1023612548] [2020-10-27 20:23:58,734 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:23:58,735 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 20:23:58,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424422911] [2020-10-27 20:23:58,735 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 20:23:58,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:23:58,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 20:23:58,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 20:23:58,736 INFO L87 Difference]: Start difference. First operand 36 states and 47 transitions. Second operand 5 states. [2020-10-27 20:23:58,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:23:58,898 INFO L93 Difference]: Finished difference Result 47 states and 61 transitions. [2020-10-27 20:23:58,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 20:23:58,899 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2020-10-27 20:23:58,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:23:58,899 INFO L225 Difference]: With dead ends: 47 [2020-10-27 20:23:58,900 INFO L226 Difference]: Without dead ends: 41 [2020-10-27 20:23:58,900 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-27 20:23:58,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-27 20:23:58,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2020-10-27 20:23:58,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-27 20:23:58,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 55 transitions. [2020-10-27 20:23:58,909 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 55 transitions. Word has length 20 [2020-10-27 20:23:58,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:23:58,909 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 55 transitions. [2020-10-27 20:23:58,909 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 20:23:58,909 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 55 transitions. [2020-10-27 20:23:58,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-27 20:23:58,910 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:23:58,910 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:23:58,911 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 20:23:58,911 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:23:58,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:23:58,911 INFO L82 PathProgramCache]: Analyzing trace with hash 2076049444, now seen corresponding path program 3 times [2020-10-27 20:23:58,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:23:58,912 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1591662240] [2020-10-27 20:23:58,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:23:58,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:23:58,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:58,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:59,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:59,146 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:23:59,146 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-27 20:23:59,146 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:23:59,146 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 222 [2020-10-27 20:23:59,147 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:23:59,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 20:23:59,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:23:59,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-27 20:23:59,147 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:23:59,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:23:59,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:23:59,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:59,277 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:23:59,277 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:23:59,277 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:23:59,277 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:23:59,278 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:23:59,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:23:59,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:23:59,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:23:59,278 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:23:59,282 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:23:59,282 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1591662240] [2020-10-27 20:23:59,282 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:23:59,283 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 20:23:59,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308034496] [2020-10-27 20:23:59,283 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 20:23:59,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:23:59,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 20:23:59,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-27 20:23:59,284 INFO L87 Difference]: Start difference. First operand 41 states and 55 transitions. Second operand 7 states. [2020-10-27 20:23:59,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:23:59,661 INFO L93 Difference]: Finished difference Result 90 states and 129 transitions. [2020-10-27 20:23:59,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 20:23:59,662 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 20 [2020-10-27 20:23:59,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:23:59,663 INFO L225 Difference]: With dead ends: 90 [2020-10-27 20:23:59,663 INFO L226 Difference]: Without dead ends: 74 [2020-10-27 20:23:59,664 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-10-27 20:23:59,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-27 20:23:59,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 51. [2020-10-27 20:23:59,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-27 20:23:59,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 68 transitions. [2020-10-27 20:23:59,674 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 68 transitions. Word has length 20 [2020-10-27 20:23:59,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:23:59,674 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 68 transitions. [2020-10-27 20:23:59,674 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 20:23:59,675 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 68 transitions. [2020-10-27 20:23:59,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-27 20:23:59,675 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:23:59,676 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:23:59,676 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 20:23:59,676 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:23:59,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:23:59,676 INFO L82 PathProgramCache]: Analyzing trace with hash 527673329, now seen corresponding path program 1 times [2020-10-27 20:23:59,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:23:59,677 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1580874470] [2020-10-27 20:23:59,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:23:59,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:23:59,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:59,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:59,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:00,001 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:24:00,001 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-27 20:24:00,002 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:24:00,002 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 312 [2020-10-27 20:24:00,002 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:24:00,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 20:24:00,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:24:00,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 20:24:00,003 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:24:00,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:24:00,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:24:00,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:00,089 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:24:00,089 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:24:00,089 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:24:00,089 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 20:24:00,090 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:24:00,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:24:00,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:24:00,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:24:00,090 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:24:00,095 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-27 20:24:00,095 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1580874470] [2020-10-27 20:24:00,096 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:24:00,096 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 20:24:00,096 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267516330] [2020-10-27 20:24:00,097 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 20:24:00,097 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:24:00,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 20:24:00,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 20:24:00,098 INFO L87 Difference]: Start difference. First operand 51 states and 68 transitions. Second operand 5 states. [2020-10-27 20:24:00,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:24:00,267 INFO L93 Difference]: Finished difference Result 76 states and 102 transitions. [2020-10-27 20:24:00,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 20:24:00,268 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2020-10-27 20:24:00,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:24:00,269 INFO L225 Difference]: With dead ends: 76 [2020-10-27 20:24:00,269 INFO L226 Difference]: Without dead ends: 68 [2020-10-27 20:24:00,270 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-27 20:24:00,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-27 20:24:00,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 64. [2020-10-27 20:24:00,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-27 20:24:00,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 86 transitions. [2020-10-27 20:24:00,289 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 86 transitions. Word has length 21 [2020-10-27 20:24:00,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:24:00,289 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 86 transitions. [2020-10-27 20:24:00,289 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 20:24:00,289 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 86 transitions. [2020-10-27 20:24:00,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-27 20:24:00,294 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:24:00,294 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:24:00,294 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 20:24:00,294 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:24:00,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:24:00,295 INFO L82 PathProgramCache]: Analyzing trace with hash 151597554, now seen corresponding path program 1 times [2020-10-27 20:24:00,296 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:24:00,296 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1504754892] [2020-10-27 20:24:00,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:24:00,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:24:00,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:00,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:00,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:00,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:00,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:00,884 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:24:00,885 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-27 20:24:00,885 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 20:24:00,885 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 577 [2020-10-27 20:24:00,885 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:24:00,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 20:24:00,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-27 20:24:00,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 20:24:00,886 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:24:00,968 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:24:00,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:24:00,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:00,976 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:24:00,976 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:24:00,976 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:24:00,977 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:24:00,977 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:24:00,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:24:00,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:24:00,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:24:00,978 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:24:00,982 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-27 20:24:00,982 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1504754892] [2020-10-27 20:24:00,983 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:24:00,983 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 20:24:00,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133398398] [2020-10-27 20:24:00,983 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 20:24:00,984 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:24:00,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 20:24:00,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 20:24:00,984 INFO L87 Difference]: Start difference. First operand 64 states and 86 transitions. Second operand 6 states. [2020-10-27 20:24:01,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:24:01,212 INFO L93 Difference]: Finished difference Result 79 states and 107 transitions. [2020-10-27 20:24:01,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 20:24:01,212 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2020-10-27 20:24:01,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:24:01,213 INFO L225 Difference]: With dead ends: 79 [2020-10-27 20:24:01,214 INFO L226 Difference]: Without dead ends: 72 [2020-10-27 20:24:01,214 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-27 20:24:01,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-27 20:24:01,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2020-10-27 20:24:01,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-27 20:24:01,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 97 transitions. [2020-10-27 20:24:01,233 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 97 transitions. Word has length 21 [2020-10-27 20:24:01,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:24:01,234 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 97 transitions. [2020-10-27 20:24:01,234 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 20:24:01,234 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 97 transitions. [2020-10-27 20:24:01,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-27 20:24:01,235 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:24:01,237 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:24:01,237 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 20:24:01,237 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:24:01,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:24:01,239 INFO L82 PathProgramCache]: Analyzing trace with hash -1703601102, now seen corresponding path program 4 times [2020-10-27 20:24:01,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:24:01,240 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [65530954] [2020-10-27 20:24:01,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:24:01,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:24:01,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:01,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:01,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:01,543 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:24:01,544 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-27 20:24:01,544 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:24:01,544 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 290 [2020-10-27 20:24:01,544 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:24:01,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 20:24:01,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:24:01,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-27 20:24:01,545 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:24:01,674 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:24:01,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:24:01,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:01,682 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:24:01,682 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:24:01,683 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:24:01,683 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:24:01,683 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:24:01,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:24:01,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:24:01,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:24:01,684 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:24:01,688 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:24:01,689 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [65530954] [2020-10-27 20:24:01,689 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:24:01,689 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 20:24:01,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604638211] [2020-10-27 20:24:01,690 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 20:24:01,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:24:01,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 20:24:01,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-27 20:24:01,691 INFO L87 Difference]: Start difference. First operand 71 states and 97 transitions. Second operand 8 states. [2020-10-27 20:24:02,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:24:02,175 INFO L93 Difference]: Finished difference Result 160 states and 228 transitions. [2020-10-27 20:24:02,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 20:24:02,176 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 21 [2020-10-27 20:24:02,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:24:02,177 INFO L225 Difference]: With dead ends: 160 [2020-10-27 20:24:02,177 INFO L226 Difference]: Without dead ends: 137 [2020-10-27 20:24:02,178 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-10-27 20:24:02,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-10-27 20:24:02,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 88. [2020-10-27 20:24:02,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-27 20:24:02,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 118 transitions. [2020-10-27 20:24:02,190 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 118 transitions. Word has length 21 [2020-10-27 20:24:02,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:24:02,190 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 118 transitions. [2020-10-27 20:24:02,190 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 20:24:02,191 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 118 transitions. [2020-10-27 20:24:02,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-27 20:24:02,191 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:24:02,192 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:24:02,192 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 20:24:02,192 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:24:02,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:24:02,192 INFO L82 PathProgramCache]: Analyzing trace with hash -254298302, now seen corresponding path program 1 times [2020-10-27 20:24:02,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:24:02,193 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1057777852] [2020-10-27 20:24:02,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:24:02,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:24:02,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:02,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:02,669 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:24:02,669 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-27 20:24:02,669 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:24:02,670 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 462 [2020-10-27 20:24:02,670 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:24:02,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 20:24:02,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:24:02,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-27 20:24:02,670 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:24:04,992 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:24:04,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:24:04,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:05,003 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:24:05,003 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:24:05,003 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:24:05,004 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 20:24:05,004 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:24:05,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:24:05,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:24:05,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:24:05,004 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:24:05,011 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 1 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 20:24:05,012 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1057777852] [2020-10-27 20:24:05,012 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:24:05,012 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 20:24:05,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681391236] [2020-10-27 20:24:05,013 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 20:24:05,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:24:05,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 20:24:05,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=54, Unknown=1, NotChecked=0, Total=72 [2020-10-27 20:24:05,014 INFO L87 Difference]: Start difference. First operand 88 states and 118 transitions. Second operand 9 states. [2020-10-27 20:24:07,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:24:07,543 INFO L93 Difference]: Finished difference Result 98 states and 128 transitions. [2020-10-27 20:24:07,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 20:24:07,544 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 22 [2020-10-27 20:24:07,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:24:07,545 INFO L225 Difference]: With dead ends: 98 [2020-10-27 20:24:07,545 INFO L226 Difference]: Without dead ends: 90 [2020-10-27 20:24:07,547 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=42, Invalid=139, Unknown=1, NotChecked=0, Total=182 [2020-10-27 20:24:07,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-27 20:24:07,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2020-10-27 20:24:07,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-27 20:24:07,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 119 transitions. [2020-10-27 20:24:07,588 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 119 transitions. Word has length 22 [2020-10-27 20:24:07,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:24:07,589 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 119 transitions. [2020-10-27 20:24:07,589 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 20:24:07,589 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 119 transitions. [2020-10-27 20:24:07,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-27 20:24:07,593 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:24:07,593 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:24:07,593 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 20:24:07,593 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:24:07,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:24:07,594 INFO L82 PathProgramCache]: Analyzing trace with hash -776524444, now seen corresponding path program 2 times [2020-10-27 20:24:07,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:24:07,598 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1117069248] [2020-10-27 20:24:07,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:24:07,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:24:07,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:07,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:07,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:07,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:08,495 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:24:08,496 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-27 20:24:08,496 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 20:24:08,496 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 882 [2020-10-27 20:24:08,496 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:24:08,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 20:24:08,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 20:24:08,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 20:24:08,497 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:24:08,583 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:24:08,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:24:08,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:08,590 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:24:08,591 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:24:08,591 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:24:08,591 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:24:08,591 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:24:08,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:24:08,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:24:08,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:24:08,592 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:24:08,595 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 20:24:08,595 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1117069248] [2020-10-27 20:24:08,596 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:24:08,596 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 20:24:08,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869206018] [2020-10-27 20:24:08,597 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 20:24:08,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:24:08,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 20:24:08,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-27 20:24:08,599 INFO L87 Difference]: Start difference. First operand 89 states and 119 transitions. Second operand 7 states. [2020-10-27 20:24:09,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:24:09,055 INFO L93 Difference]: Finished difference Result 106 states and 139 transitions. [2020-10-27 20:24:09,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 20:24:09,056 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 22 [2020-10-27 20:24:09,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:24:09,057 INFO L225 Difference]: With dead ends: 106 [2020-10-27 20:24:09,058 INFO L226 Difference]: Without dead ends: 93 [2020-10-27 20:24:09,059 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2020-10-27 20:24:09,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-27 20:24:09,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 85. [2020-10-27 20:24:09,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-27 20:24:09,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 111 transitions. [2020-10-27 20:24:09,069 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 111 transitions. Word has length 22 [2020-10-27 20:24:09,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:24:09,070 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 111 transitions. [2020-10-27 20:24:09,070 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 20:24:09,070 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 111 transitions. [2020-10-27 20:24:09,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-27 20:24:09,071 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:24:09,071 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:24:09,071 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 20:24:09,071 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:24:09,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:24:09,072 INFO L82 PathProgramCache]: Analyzing trace with hash 1473894066, now seen corresponding path program 1 times [2020-10-27 20:24:09,072 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:24:09,072 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [474986417] [2020-10-27 20:24:09,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:24:09,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:24:09,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:09,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:09,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:09,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:09,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:09,544 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:24:09,545 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-27 20:24:09,545 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 20:24:09,545 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 462 [2020-10-27 20:24:09,545 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:24:09,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 20:24:09,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-27 20:24:09,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 20:24:09,546 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:24:09,644 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:24:09,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:24:09,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:09,649 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:24:09,650 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:24:09,650 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:24:09,650 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:24:09,650 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:24:09,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:24:09,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:24:09,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:24:09,651 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:24:09,655 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-27 20:24:09,656 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [474986417] [2020-10-27 20:24:09,656 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:24:09,656 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 20:24:09,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750996877] [2020-10-27 20:24:09,658 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 20:24:09,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:24:09,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 20:24:09,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-10-27 20:24:09,659 INFO L87 Difference]: Start difference. First operand 85 states and 111 transitions. Second operand 7 states. [2020-10-27 20:24:09,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:24:09,984 INFO L93 Difference]: Finished difference Result 101 states and 134 transitions. [2020-10-27 20:24:09,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 20:24:09,984 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 22 [2020-10-27 20:24:09,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:24:09,985 INFO L225 Difference]: With dead ends: 101 [2020-10-27 20:24:09,986 INFO L226 Difference]: Without dead ends: 94 [2020-10-27 20:24:09,986 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-10-27 20:24:09,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-27 20:24:09,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 92. [2020-10-27 20:24:09,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-27 20:24:09,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 122 transitions. [2020-10-27 20:24:09,997 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 122 transitions. Word has length 22 [2020-10-27 20:24:09,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:24:09,997 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 122 transitions. [2020-10-27 20:24:09,997 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 20:24:09,998 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 122 transitions. [2020-10-27 20:24:09,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-27 20:24:09,998 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:24:09,999 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:24:09,999 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 20:24:09,999 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:24:09,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:24:09,999 INFO L82 PathProgramCache]: Analyzing trace with hash 1386316260, now seen corresponding path program 5 times [2020-10-27 20:24:10,000 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:24:10,000 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1196864756] [2020-10-27 20:24:10,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:24:10,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:24:10,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:10,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:10,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:10,576 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:24:10,576 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-27 20:24:10,576 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:24:10,576 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 565 [2020-10-27 20:24:10,576 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:24:10,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 20:24:10,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:24:10,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-27 20:24:10,577 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:24:10,726 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:24:10,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:24:10,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:10,733 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:24:10,734 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:24:10,734 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:24:10,734 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:24:10,734 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:24:10,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:24:10,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:24:10,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:24:10,735 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:24:10,739 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:24:10,739 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1196864756] [2020-10-27 20:24:10,742 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:24:10,742 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 20:24:10,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128813228] [2020-10-27 20:24:10,743 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 20:24:10,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:24:10,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 20:24:10,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-27 20:24:10,744 INFO L87 Difference]: Start difference. First operand 92 states and 122 transitions. Second operand 10 states. [2020-10-27 20:24:11,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:24:11,480 INFO L93 Difference]: Finished difference Result 218 states and 309 transitions. [2020-10-27 20:24:11,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 20:24:11,482 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 22 [2020-10-27 20:24:11,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:24:11,483 INFO L225 Difference]: With dead ends: 218 [2020-10-27 20:24:11,483 INFO L226 Difference]: Without dead ends: 188 [2020-10-27 20:24:11,486 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2020-10-27 20:24:11,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2020-10-27 20:24:11,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 115. [2020-10-27 20:24:11,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-10-27 20:24:11,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 150 transitions. [2020-10-27 20:24:11,500 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 150 transitions. Word has length 22 [2020-10-27 20:24:11,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:24:11,500 INFO L481 AbstractCegarLoop]: Abstraction has 115 states and 150 transitions. [2020-10-27 20:24:11,500 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 20:24:11,500 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 150 transitions. [2020-10-27 20:24:11,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-27 20:24:11,501 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:24:11,501 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:24:11,501 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-27 20:24:11,501 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:24:11,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:24:11,502 INFO L82 PathProgramCache]: Analyzing trace with hash 1274384913, now seen corresponding path program 2 times [2020-10-27 20:24:11,502 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:24:11,502 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [850540370] [2020-10-27 20:24:11,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:24:11,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:24:11,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:11,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:11,961 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:24:11,961 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-27 20:24:11,961 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:24:11,961 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 446 [2020-10-27 20:24:11,961 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:24:11,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 20:24:11,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:24:11,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-27 20:24:11,962 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:24:12,035 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:24:12,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:24:12,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:12,040 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:24:12,041 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:24:12,041 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:24:12,041 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:24:12,041 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:24:12,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:24:12,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:24:12,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:24:12,042 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:24:12,045 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-27 20:24:12,045 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [850540370] [2020-10-27 20:24:12,046 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:24:12,046 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 20:24:12,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474067809] [2020-10-27 20:24:12,046 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 20:24:12,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:24:12,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 20:24:12,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 20:24:12,047 INFO L87 Difference]: Start difference. First operand 115 states and 150 transitions. Second operand 5 states. [2020-10-27 20:24:12,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:24:12,222 INFO L93 Difference]: Finished difference Result 141 states and 185 transitions. [2020-10-27 20:24:12,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 20:24:12,223 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 23 [2020-10-27 20:24:12,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:24:12,224 INFO L225 Difference]: With dead ends: 141 [2020-10-27 20:24:12,224 INFO L226 Difference]: Without dead ends: 119 [2020-10-27 20:24:12,224 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-27 20:24:12,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-10-27 20:24:12,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 109. [2020-10-27 20:24:12,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-10-27 20:24:12,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 142 transitions. [2020-10-27 20:24:12,236 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 142 transitions. Word has length 23 [2020-10-27 20:24:12,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:24:12,236 INFO L481 AbstractCegarLoop]: Abstraction has 109 states and 142 transitions. [2020-10-27 20:24:12,236 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 20:24:12,236 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 142 transitions. [2020-10-27 20:24:12,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-27 20:24:12,237 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:24:12,237 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:24:12,237 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-27 20:24:12,237 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:24:12,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:24:12,238 INFO L82 PathProgramCache]: Analyzing trace with hash -484587022, now seen corresponding path program 2 times [2020-10-27 20:24:12,238 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:24:12,238 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1534792074] [2020-10-27 20:24:12,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:24:12,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:24:12,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:12,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:12,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:12,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:13,029 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:24:13,029 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-27 20:24:13,029 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 20:24:13,029 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 780 [2020-10-27 20:24:13,029 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:24:13,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 20:24:13,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-27 20:24:13,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-27 20:24:13,030 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:24:13,086 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:24:13,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:24:13,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:13,091 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:24:13,092 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:24:13,092 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:24:13,092 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:24:13,092 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:24:13,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:24:13,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:24:13,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:24:13,093 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:24:13,096 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-27 20:24:13,097 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1534792074] [2020-10-27 20:24:13,097 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:24:13,097 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 20:24:13,097 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638766482] [2020-10-27 20:24:13,097 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 20:24:13,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:24:13,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 20:24:13,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 20:24:13,098 INFO L87 Difference]: Start difference. First operand 109 states and 142 transitions. Second operand 5 states. [2020-10-27 20:24:13,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:24:13,287 INFO L93 Difference]: Finished difference Result 134 states and 171 transitions. [2020-10-27 20:24:13,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 20:24:13,287 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 23 [2020-10-27 20:24:13,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:24:13,288 INFO L225 Difference]: With dead ends: 134 [2020-10-27 20:24:13,288 INFO L226 Difference]: Without dead ends: 104 [2020-10-27 20:24:13,289 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-27 20:24:13,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-27 20:24:13,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 93. [2020-10-27 20:24:13,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-27 20:24:13,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 119 transitions. [2020-10-27 20:24:13,301 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 119 transitions. Word has length 23 [2020-10-27 20:24:13,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:24:13,301 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 119 transitions. [2020-10-27 20:24:13,302 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 20:24:13,302 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 119 transitions. [2020-10-27 20:24:13,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-27 20:24:13,302 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:24:13,302 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:24:13,303 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-27 20:24:13,303 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:24:13,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:24:13,303 INFO L82 PathProgramCache]: Analyzing trace with hash -1610493326, now seen corresponding path program 6 times [2020-10-27 20:24:13,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:24:13,304 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1355013974] [2020-10-27 20:24:13,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:24:13,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:24:13,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:13,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:13,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:13,724 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:24:13,724 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-27 20:24:13,724 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:24:13,724 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 411 [2020-10-27 20:24:13,725 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:24:13,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 20:24:13,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:24:13,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-27 20:24:13,725 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:24:13,900 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:24:13,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:24:13,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:13,906 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:24:13,906 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:24:13,906 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:24:13,906 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:24:13,906 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:24:13,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:24:13,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:24:13,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:24:13,907 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:24:13,911 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:24:13,911 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1355013974] [2020-10-27 20:24:13,911 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:24:13,911 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 20:24:13,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177612201] [2020-10-27 20:24:13,913 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 20:24:13,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:24:13,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 20:24:13,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-27 20:24:13,914 INFO L87 Difference]: Start difference. First operand 93 states and 119 transitions. Second operand 11 states. [2020-10-27 20:24:14,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:24:14,803 INFO L93 Difference]: Finished difference Result 207 states and 281 transitions. [2020-10-27 20:24:14,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 20:24:14,804 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 23 [2020-10-27 20:24:14,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:24:14,806 INFO L225 Difference]: With dead ends: 207 [2020-10-27 20:24:14,806 INFO L226 Difference]: Without dead ends: 181 [2020-10-27 20:24:14,806 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2020-10-27 20:24:14,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2020-10-27 20:24:14,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 100. [2020-10-27 20:24:14,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-27 20:24:14,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 129 transitions. [2020-10-27 20:24:14,819 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 129 transitions. Word has length 23 [2020-10-27 20:24:14,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:24:14,820 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 129 transitions. [2020-10-27 20:24:14,820 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 20:24:14,820 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 129 transitions. [2020-10-27 20:24:14,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-27 20:24:14,821 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:24:14,821 INFO L422 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:24:14,821 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-27 20:24:14,821 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:24:14,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:24:14,822 INFO L82 PathProgramCache]: Analyzing trace with hash -22309980, now seen corresponding path program 7 times [2020-10-27 20:24:14,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:24:14,822 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1216664222] [2020-10-27 20:24:14,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:24:14,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:24:14,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:14,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:14,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:15,409 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:24:15,410 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-27 20:24:15,410 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:24:15,410 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 576 [2020-10-27 20:24:15,410 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:24:15,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 20:24:15,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:24:15,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 20:24:15,411 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:24:15,598 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:24:15,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:24:15,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:15,604 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:24:15,605 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:24:15,605 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:24:15,605 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:24:15,605 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:24:15,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:24:15,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:24:15,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:24:15,606 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:24:15,610 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:24:15,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1216664222] [2020-10-27 20:24:15,610 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:24:15,611 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 20:24:15,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637901744] [2020-10-27 20:24:15,611 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 20:24:15,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:24:15,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 20:24:15,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-10-27 20:24:15,612 INFO L87 Difference]: Start difference. First operand 100 states and 129 transitions. Second operand 12 states. [2020-10-27 20:24:16,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:24:16,658 INFO L93 Difference]: Finished difference Result 225 states and 308 transitions. [2020-10-27 20:24:16,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 20:24:16,659 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 24 [2020-10-27 20:24:16,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:24:16,661 INFO L225 Difference]: With dead ends: 225 [2020-10-27 20:24:16,661 INFO L226 Difference]: Without dead ends: 199 [2020-10-27 20:24:16,661 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2020-10-27 20:24:16,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2020-10-27 20:24:16,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 107. [2020-10-27 20:24:16,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-10-27 20:24:16,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 139 transitions. [2020-10-27 20:24:16,679 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 139 transitions. Word has length 24 [2020-10-27 20:24:16,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:24:16,680 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 139 transitions. [2020-10-27 20:24:16,680 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 20:24:16,680 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 139 transitions. [2020-10-27 20:24:16,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-27 20:24:16,681 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:24:16,681 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:24:16,681 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-27 20:24:16,681 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:24:16,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:24:16,682 INFO L82 PathProgramCache]: Analyzing trace with hash 1758336626, now seen corresponding path program 3 times [2020-10-27 20:24:16,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:24:16,682 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2006444373] [2020-10-27 20:24:16,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:24:16,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:24:16,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:16,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:16,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:16,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:16,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:19,193 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:24:19,194 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-27 20:24:19,194 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 20:24:19,194 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2494 [2020-10-27 20:24:19,194 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:24:19,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 20:24:19,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-27 20:24:19,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-27 20:24:19,195 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:24:19,320 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:24:19,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:24:19,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:19,326 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:24:19,326 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:24:19,326 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:24:19,326 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:24:19,326 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:24:19,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:24:19,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:24:19,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:24:19,327 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:24:19,331 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-27 20:24:19,332 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2006444373] [2020-10-27 20:24:19,332 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:24:19,332 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 20:24:19,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857073885] [2020-10-27 20:24:19,334 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 20:24:19,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:24:19,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 20:24:19,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-27 20:24:19,335 INFO L87 Difference]: Start difference. First operand 107 states and 139 transitions. Second operand 9 states. [2020-10-27 20:24:20,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:24:20,309 INFO L93 Difference]: Finished difference Result 142 states and 175 transitions. [2020-10-27 20:24:20,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 20:24:20,311 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 25 [2020-10-27 20:24:20,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:24:20,311 INFO L225 Difference]: With dead ends: 142 [2020-10-27 20:24:20,312 INFO L226 Difference]: Without dead ends: 128 [2020-10-27 20:24:20,312 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=94, Invalid=326, Unknown=0, NotChecked=0, Total=420 [2020-10-27 20:24:20,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-27 20:24:20,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 104. [2020-10-27 20:24:20,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-27 20:24:20,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 135 transitions. [2020-10-27 20:24:20,325 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 135 transitions. Word has length 25 [2020-10-27 20:24:20,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:24:20,325 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 135 transitions. [2020-10-27 20:24:20,325 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 20:24:20,325 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 135 transitions. [2020-10-27 20:24:20,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-27 20:24:20,326 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:24:20,326 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:24:20,326 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-27 20:24:20,326 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:24:20,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:24:20,327 INFO L82 PathProgramCache]: Analyzing trace with hash -772735982, now seen corresponding path program 3 times [2020-10-27 20:24:20,327 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:24:20,327 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [756459696] [2020-10-27 20:24:20,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:24:20,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:24:20,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:20,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:20,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:20,936 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:24:20,937 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-27 20:24:20,937 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:24:20,937 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 597 [2020-10-27 20:24:20,937 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:24:20,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 20:24:20,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 20:24:20,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-27 20:24:20,938 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:24:21,021 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:24:21,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:24:21,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:21,026 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:24:21,027 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:24:21,028 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:24:21,029 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:24:21,029 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:24:21,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:24:21,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:24:21,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:24:21,029 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:24:21,033 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-27 20:24:21,033 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [756459696] [2020-10-27 20:24:21,033 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:24:21,034 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 20:24:21,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942996062] [2020-10-27 20:24:21,034 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 20:24:21,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:24:21,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 20:24:21,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 20:24:21,036 INFO L87 Difference]: Start difference. First operand 104 states and 135 transitions. Second operand 6 states. [2020-10-27 20:24:21,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:24:21,326 INFO L93 Difference]: Finished difference Result 155 states and 202 transitions. [2020-10-27 20:24:21,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 20:24:21,326 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 25 [2020-10-27 20:24:21,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:24:21,327 INFO L225 Difference]: With dead ends: 155 [2020-10-27 20:24:21,328 INFO L226 Difference]: Without dead ends: 144 [2020-10-27 20:24:21,328 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-27 20:24:21,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-10-27 20:24:21,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 134. [2020-10-27 20:24:21,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-10-27 20:24:21,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 175 transitions. [2020-10-27 20:24:21,344 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 175 transitions. Word has length 25 [2020-10-27 20:24:21,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:24:21,344 INFO L481 AbstractCegarLoop]: Abstraction has 134 states and 175 transitions. [2020-10-27 20:24:21,344 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 20:24:21,344 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 175 transitions. [2020-10-27 20:24:21,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-27 20:24:21,345 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:24:21,345 INFO L422 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:24:21,345 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-27 20:24:21,345 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:24:21,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:24:21,346 INFO L82 PathProgramCache]: Analyzing trace with hash 1966733490, now seen corresponding path program 8 times [2020-10-27 20:24:21,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:24:21,346 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [154471325] [2020-10-27 20:24:21,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:24:21,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:24:21,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:21,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:21,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:22,215 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:24:22,215 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-27 20:24:22,215 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:24:22,216 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 858 [2020-10-27 20:24:22,216 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:24:22,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 20:24:22,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:24:22,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 20:24:22,216 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:24:22,422 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:24:22,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:24:22,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:22,429 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:24:22,429 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:24:22,429 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:24:22,430 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:24:22,430 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:24:22,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:24:22,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:24:22,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:24:22,430 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:24:22,434 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:24:22,435 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [154471325] [2020-10-27 20:24:22,435 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:24:22,435 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 20:24:22,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570141214] [2020-10-27 20:24:22,435 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 20:24:22,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:24:22,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 20:24:22,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-10-27 20:24:22,436 INFO L87 Difference]: Start difference. First operand 134 states and 175 transitions. Second operand 13 states. [2020-10-27 20:24:23,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:24:23,824 INFO L93 Difference]: Finished difference Result 287 states and 398 transitions. [2020-10-27 20:24:23,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 20:24:23,825 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 25 [2020-10-27 20:24:23,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:24:23,826 INFO L225 Difference]: With dead ends: 287 [2020-10-27 20:24:23,826 INFO L226 Difference]: Without dead ends: 257 [2020-10-27 20:24:23,827 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2020-10-27 20:24:23,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2020-10-27 20:24:23,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 143. [2020-10-27 20:24:23,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-27 20:24:23,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 188 transitions. [2020-10-27 20:24:23,846 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 188 transitions. Word has length 25 [2020-10-27 20:24:23,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:24:23,846 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 188 transitions. [2020-10-27 20:24:23,846 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 20:24:23,846 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 188 transitions. [2020-10-27 20:24:23,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-27 20:24:23,847 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:24:23,847 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:24:23,847 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-27 20:24:23,847 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:24:23,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:24:23,848 INFO L82 PathProgramCache]: Analyzing trace with hash 218402755, now seen corresponding path program 4 times [2020-10-27 20:24:23,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:24:23,848 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [790247343] [2020-10-27 20:24:23,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:24:23,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:24:23,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:23,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:23,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:24,461 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:24:24,461 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-27 20:24:24,462 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:24:24,462 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 600 [2020-10-27 20:24:24,462 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:24:24,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 20:24:24,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 20:24:24,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 20:24:24,462 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:24:24,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:24:24,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:24:24,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:24,565 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:24:24,565 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:24:24,565 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:24:24,565 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:24:24,565 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:24:24,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:24:24,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:24:24,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:24:24,566 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:24:24,570 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-27 20:24:24,571 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [790247343] [2020-10-27 20:24:24,571 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:24:24,571 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 20:24:24,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116757440] [2020-10-27 20:24:24,572 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 20:24:24,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:24:24,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 20:24:24,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-10-27 20:24:24,573 INFO L87 Difference]: Start difference. First operand 143 states and 188 transitions. Second operand 7 states. [2020-10-27 20:24:24,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:24:24,974 INFO L93 Difference]: Finished difference Result 207 states and 279 transitions. [2020-10-27 20:24:24,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 20:24:24,974 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 26 [2020-10-27 20:24:24,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:24:24,977 INFO L225 Difference]: With dead ends: 207 [2020-10-27 20:24:24,979 INFO L226 Difference]: Without dead ends: 193 [2020-10-27 20:24:24,979 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-10-27 20:24:24,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-10-27 20:24:25,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 179. [2020-10-27 20:24:25,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2020-10-27 20:24:25,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 235 transitions. [2020-10-27 20:24:25,006 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 235 transitions. Word has length 26 [2020-10-27 20:24:25,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:24:25,006 INFO L481 AbstractCegarLoop]: Abstraction has 179 states and 235 transitions. [2020-10-27 20:24:25,006 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 20:24:25,006 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 235 transitions. [2020-10-27 20:24:25,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-27 20:24:25,007 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:24:25,007 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:24:25,009 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-27 20:24:25,009 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:24:25,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:24:25,010 INFO L82 PathProgramCache]: Analyzing trace with hash 1748275394, now seen corresponding path program 5 times [2020-10-27 20:24:25,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:24:25,010 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [526465259] [2020-10-27 20:24:25,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:24:25,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:24:25,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:25,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:25,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:25,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:25,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:26,215 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:24:26,216 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-27 20:24:26,216 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 20:24:26,216 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1192 [2020-10-27 20:24:26,216 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:24:26,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 20:24:26,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-27 20:24:26,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-27 20:24:26,217 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:24:26,387 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:24:26,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:24:26,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:26,394 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:24:26,395 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:24:26,395 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:24:26,395 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:24:26,395 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:24:26,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:24:26,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:24:26,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:24:26,396 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:24:26,400 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-27 20:24:26,400 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [526465259] [2020-10-27 20:24:26,401 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:24:26,401 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 20:24:26,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814395005] [2020-10-27 20:24:26,401 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 20:24:26,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:24:26,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 20:24:26,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-27 20:24:26,402 INFO L87 Difference]: Start difference. First operand 179 states and 235 transitions. Second operand 8 states. [2020-10-27 20:24:26,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:24:26,873 INFO L93 Difference]: Finished difference Result 280 states and 345 transitions. [2020-10-27 20:24:26,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 20:24:26,874 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 26 [2020-10-27 20:24:26,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:24:26,877 INFO L225 Difference]: With dead ends: 280 [2020-10-27 20:24:26,877 INFO L226 Difference]: Without dead ends: 273 [2020-10-27 20:24:26,878 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2020-10-27 20:24:26,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2020-10-27 20:24:26,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 205. [2020-10-27 20:24:26,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2020-10-27 20:24:26,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 265 transitions. [2020-10-27 20:24:26,903 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 265 transitions. Word has length 26 [2020-10-27 20:24:26,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:24:26,905 INFO L481 AbstractCegarLoop]: Abstraction has 205 states and 265 transitions. [2020-10-27 20:24:26,905 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 20:24:26,905 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 265 transitions. [2020-10-27 20:24:26,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-27 20:24:26,906 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:24:26,906 INFO L422 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:24:26,906 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-27 20:24:26,906 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:24:26,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:24:26,907 INFO L82 PathProgramCache]: Analyzing trace with hash -797428380, now seen corresponding path program 9 times [2020-10-27 20:24:26,907 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:24:26,907 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [718460730] [2020-10-27 20:24:26,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:24:26,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:24:26,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:26,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:27,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:28,000 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:24:28,000 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-27 20:24:28,000 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:24:28,000 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1080 [2020-10-27 20:24:28,001 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:24:28,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 20:24:28,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:24:28,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 20:24:28,001 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:24:28,207 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:24:28,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:24:28,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:28,213 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:24:28,213 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:24:28,213 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:24:28,214 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:24:28,214 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:24:28,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:24:28,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:24:28,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:24:28,214 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:24:28,222 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:24:28,223 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [718460730] [2020-10-27 20:24:28,223 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:24:28,223 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 20:24:28,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649853979] [2020-10-27 20:24:28,224 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 20:24:28,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:24:28,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 20:24:28,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-10-27 20:24:28,225 INFO L87 Difference]: Start difference. First operand 205 states and 265 transitions. Second operand 13 states. [2020-10-27 20:24:29,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:24:29,670 INFO L93 Difference]: Finished difference Result 357 states and 472 transitions. [2020-10-27 20:24:29,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 20:24:29,670 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 26 [2020-10-27 20:24:29,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:24:29,672 INFO L225 Difference]: With dead ends: 357 [2020-10-27 20:24:29,673 INFO L226 Difference]: Without dead ends: 348 [2020-10-27 20:24:29,673 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2020-10-27 20:24:29,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2020-10-27 20:24:29,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 208. [2020-10-27 20:24:29,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2020-10-27 20:24:29,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 269 transitions. [2020-10-27 20:24:29,695 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 269 transitions. Word has length 26 [2020-10-27 20:24:29,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:24:29,696 INFO L481 AbstractCegarLoop]: Abstraction has 208 states and 269 transitions. [2020-10-27 20:24:29,696 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 20:24:29,696 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 269 transitions. [2020-10-27 20:24:29,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-27 20:24:29,697 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:24:29,697 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:24:29,697 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-27 20:24:29,697 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:24:29,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:24:29,700 INFO L82 PathProgramCache]: Analyzing trace with hash 878932530, now seen corresponding path program 6 times [2020-10-27 20:24:29,700 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:24:29,701 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1042399231] [2020-10-27 20:24:29,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:24:29,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:24:29,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:29,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:30,472 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:24:30,472 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-27 20:24:30,473 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:24:30,473 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 759 [2020-10-27 20:24:30,473 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:24:30,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 20:24:30,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:24:30,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-27 20:24:30,473 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:24:30,656 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:24:30,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:24:30,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:30,663 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:24:30,663 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:24:30,663 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:24:30,663 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:24:30,664 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:24:30,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:24:30,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:24:30,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:24:30,664 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:24:30,668 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-27 20:24:30,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1042399231] [2020-10-27 20:24:30,669 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:24:30,669 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 20:24:30,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103154379] [2020-10-27 20:24:30,669 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 20:24:30,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:24:30,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 20:24:30,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-27 20:24:30,670 INFO L87 Difference]: Start difference. First operand 208 states and 269 transitions. Second operand 9 states. [2020-10-27 20:24:31,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:24:31,084 INFO L93 Difference]: Finished difference Result 220 states and 280 transitions. [2020-10-27 20:24:31,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 20:24:31,084 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 27 [2020-10-27 20:24:31,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:24:31,086 INFO L225 Difference]: With dead ends: 220 [2020-10-27 20:24:31,086 INFO L226 Difference]: Without dead ends: 205 [2020-10-27 20:24:31,087 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 4 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2020-10-27 20:24:31,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2020-10-27 20:24:31,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 205. [2020-10-27 20:24:31,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2020-10-27 20:24:31,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 265 transitions. [2020-10-27 20:24:31,108 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 265 transitions. Word has length 27 [2020-10-27 20:24:31,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:24:31,108 INFO L481 AbstractCegarLoop]: Abstraction has 205 states and 265 transitions. [2020-10-27 20:24:31,109 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 20:24:31,109 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 265 transitions. [2020-10-27 20:24:31,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-27 20:24:31,109 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:24:31,110 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:24:31,110 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-27 20:24:31,110 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:24:31,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:24:31,110 INFO L82 PathProgramCache]: Analyzing trace with hash -274906990, now seen corresponding path program 7 times [2020-10-27 20:24:31,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:24:31,111 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1929996676] [2020-10-27 20:24:31,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:24:31,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:24:31,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:31,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:31,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:31,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:31,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:34,023 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:24:34,023 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-27 20:24:34,023 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 20:24:34,023 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2900 [2020-10-27 20:24:34,023 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:24:34,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 20:24:34,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-27 20:24:34,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-27 20:24:34,024 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:24:34,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:24:34,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:24:34,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:34,164 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:24:34,164 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:24:34,164 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:24:34,164 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:24:34,164 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:24:34,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:24:34,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:24:34,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:24:34,165 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:24:34,168 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-27 20:24:34,168 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1929996676] [2020-10-27 20:24:34,169 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:24:34,169 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 20:24:34,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411040921] [2020-10-27 20:24:34,169 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 20:24:34,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:24:34,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 20:24:34,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-27 20:24:34,170 INFO L87 Difference]: Start difference. First operand 205 states and 265 transitions. Second operand 9 states. [2020-10-27 20:24:35,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:24:35,190 INFO L93 Difference]: Finished difference Result 275 states and 342 transitions. [2020-10-27 20:24:35,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 20:24:35,191 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 27 [2020-10-27 20:24:35,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:24:35,194 INFO L225 Difference]: With dead ends: 275 [2020-10-27 20:24:35,194 INFO L226 Difference]: Without dead ends: 252 [2020-10-27 20:24:35,195 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=97, Invalid=323, Unknown=0, NotChecked=0, Total=420 [2020-10-27 20:24:35,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2020-10-27 20:24:35,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 191. [2020-10-27 20:24:35,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2020-10-27 20:24:35,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 245 transitions. [2020-10-27 20:24:35,215 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 245 transitions. Word has length 27 [2020-10-27 20:24:35,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:24:35,215 INFO L481 AbstractCegarLoop]: Abstraction has 191 states and 245 transitions. [2020-10-27 20:24:35,215 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 20:24:35,215 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 245 transitions. [2020-10-27 20:24:35,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-27 20:24:35,216 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:24:35,216 INFO L422 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:24:35,216 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-27 20:24:35,216 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:24:35,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:24:35,217 INFO L82 PathProgramCache]: Analyzing trace with hash -587100430, now seen corresponding path program 10 times [2020-10-27 20:24:35,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:24:35,217 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1793698301] [2020-10-27 20:24:35,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:24:35,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:24:35,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:35,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:35,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:35,817 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:24:35,817 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-27 20:24:35,817 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:24:35,817 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 589 [2020-10-27 20:24:35,818 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:24:35,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 20:24:35,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:24:35,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-27 20:24:35,818 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:24:36,098 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:24:36,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:24:36,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:36,103 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:24:36,103 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:24:36,103 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:24:36,103 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:24:36,103 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:24:36,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:24:36,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:24:36,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:24:36,103 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:24:36,106 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:24:36,107 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1793698301] [2020-10-27 20:24:36,107 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:24:36,107 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 20:24:36,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899280979] [2020-10-27 20:24:36,107 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 20:24:36,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:24:36,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 20:24:36,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2020-10-27 20:24:36,108 INFO L87 Difference]: Start difference. First operand 191 states and 245 transitions. Second operand 15 states. [2020-10-27 20:24:37,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:24:37,960 INFO L93 Difference]: Finished difference Result 432 states and 591 transitions. [2020-10-27 20:24:37,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 20:24:37,961 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 27 [2020-10-27 20:24:37,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:24:37,963 INFO L225 Difference]: With dead ends: 432 [2020-10-27 20:24:37,963 INFO L226 Difference]: Without dead ends: 394 [2020-10-27 20:24:37,966 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=77, Invalid=625, Unknown=0, NotChecked=0, Total=702 [2020-10-27 20:24:37,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2020-10-27 20:24:37,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 210. [2020-10-27 20:24:37,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 210 states. [2020-10-27 20:24:37,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 273 transitions. [2020-10-27 20:24:37,994 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 273 transitions. Word has length 27 [2020-10-27 20:24:37,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:24:37,995 INFO L481 AbstractCegarLoop]: Abstraction has 210 states and 273 transitions. [2020-10-27 20:24:37,995 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 20:24:37,995 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 273 transitions. [2020-10-27 20:24:37,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-27 20:24:37,996 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:24:37,996 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:24:37,996 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-27 20:24:37,997 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:24:37,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:24:37,997 INFO L82 PathProgramCache]: Analyzing trace with hash 619492546, now seen corresponding path program 8 times [2020-10-27 20:24:37,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:24:37,997 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [126598265] [2020-10-27 20:24:37,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:24:38,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:24:38,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:38,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:38,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:38,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:38,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:40,259 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:24:40,260 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-27 20:24:40,260 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 20:24:40,260 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2250 [2020-10-27 20:24:40,260 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:24:40,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 20:24:40,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-27 20:24:40,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-27 20:24:40,261 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:24:40,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:24:40,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:24:40,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:40,510 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:24:40,510 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:24:40,510 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:24:40,511 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:24:40,511 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:24:40,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:24:40,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:24:40,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:24:40,511 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:24:40,514 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-27 20:24:40,514 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [126598265] [2020-10-27 20:24:40,514 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:24:40,515 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 20:24:40,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890422292] [2020-10-27 20:24:40,515 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 20:24:40,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:24:40,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 20:24:40,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2020-10-27 20:24:40,516 INFO L87 Difference]: Start difference. First operand 210 states and 273 transitions. Second operand 11 states. [2020-10-27 20:24:43,038 WARN L193 SmtUtils]: Spent 2.27 s on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2020-10-27 20:24:43,889 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 46 [2020-10-27 20:24:46,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:24:46,223 INFO L93 Difference]: Finished difference Result 276 states and 338 transitions. [2020-10-27 20:24:46,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 20:24:46,224 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 28 [2020-10-27 20:24:46,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:24:46,225 INFO L225 Difference]: With dead ends: 276 [2020-10-27 20:24:46,225 INFO L226 Difference]: Without dead ends: 260 [2020-10-27 20:24:46,226 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=92, Invalid=370, Unknown=0, NotChecked=0, Total=462 [2020-10-27 20:24:46,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2020-10-27 20:24:46,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 206. [2020-10-27 20:24:46,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 206 states. [2020-10-27 20:24:46,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 267 transitions. [2020-10-27 20:24:46,247 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 267 transitions. Word has length 28 [2020-10-27 20:24:46,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:24:46,248 INFO L481 AbstractCegarLoop]: Abstraction has 206 states and 267 transitions. [2020-10-27 20:24:46,248 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 20:24:46,248 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 267 transitions. [2020-10-27 20:24:46,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-27 20:24:46,248 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:24:46,249 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:24:46,249 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-27 20:24:46,249 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:24:46,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:24:46,249 INFO L82 PathProgramCache]: Analyzing trace with hash 115632050, now seen corresponding path program 9 times [2020-10-27 20:24:46,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:24:46,250 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [96681952] [2020-10-27 20:24:46,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:24:46,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:24:46,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:46,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:46,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:46,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:46,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:47,234 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:24:47,235 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-27 20:24:47,235 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 20:24:47,235 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 973 [2020-10-27 20:24:47,235 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:24:47,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 20:24:47,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-27 20:24:47,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 20:24:47,241 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-27 20:24:47,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:24:47,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:24:47,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:47,391 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:24:47,391 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:24:47,391 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:24:47,391 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 20:24:47,392 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:24:47,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:24:47,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:24:47,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:24:47,392 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:24:47,396 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-27 20:24:47,396 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [96681952] [2020-10-27 20:24:47,396 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:24:47,397 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 20:24:47,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007685186] [2020-10-27 20:24:47,397 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 20:24:47,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:24:47,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 20:24:47,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-27 20:24:47,398 INFO L87 Difference]: Start difference. First operand 206 states and 267 transitions. Second operand 9 states. [2020-10-27 20:24:47,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:24:47,989 INFO L93 Difference]: Finished difference Result 347 states and 418 transitions. [2020-10-27 20:24:47,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 20:24:47,990 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 28 [2020-10-27 20:24:47,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:24:47,992 INFO L225 Difference]: With dead ends: 347 [2020-10-27 20:24:47,992 INFO L226 Difference]: Without dead ends: 340 [2020-10-27 20:24:47,993 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-10-27 20:24:47,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2020-10-27 20:24:48,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 240. [2020-10-27 20:24:48,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 240 states. [2020-10-27 20:24:48,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 306 transitions. [2020-10-27 20:24:48,017 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 306 transitions. Word has length 28 [2020-10-27 20:24:48,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:24:48,017 INFO L481 AbstractCegarLoop]: Abstraction has 240 states and 306 transitions. [2020-10-27 20:24:48,017 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 20:24:48,018 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 306 transitions. [2020-10-27 20:24:48,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-27 20:24:48,018 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:24:48,019 INFO L422 BasicCegarLoop]: trace histogram [11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:24:48,019 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-27 20:24:48,019 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:24:48,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:24:48,019 INFO L82 PathProgramCache]: Analyzing trace with hash 1638098724, now seen corresponding path program 11 times [2020-10-27 20:24:48,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:24:48,020 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1445412638] [2020-10-27 20:24:48,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:24:48,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:24:48,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:48,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:48,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:48,657 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:24:48,657 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-27 20:24:48,657 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:24:48,657 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 626 [2020-10-27 20:24:48,657 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:24:48,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 20:24:48,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:24:48,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-27 20:24:48,657 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:24:48,984 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:24:48,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:24:48,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:48,990 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:24:48,990 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:24:48,990 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:24:48,991 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:24:48,991 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:24:48,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:24:48,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:24:48,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:24:48,991 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:24:48,995 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:24:48,995 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1445412638] [2020-10-27 20:24:48,995 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:24:48,995 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 20:24:48,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626560080] [2020-10-27 20:24:48,996 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 20:24:48,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:24:48,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 20:24:48,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2020-10-27 20:24:48,997 INFO L87 Difference]: Start difference. First operand 240 states and 306 transitions. Second operand 16 states. [2020-10-27 20:24:51,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:24:51,082 INFO L93 Difference]: Finished difference Result 505 states and 682 transitions. [2020-10-27 20:24:51,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 20:24:51,083 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 28 [2020-10-27 20:24:51,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:24:51,086 INFO L225 Difference]: With dead ends: 505 [2020-10-27 20:24:51,086 INFO L226 Difference]: Without dead ends: 461 [2020-10-27 20:24:51,087 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=83, Invalid=729, Unknown=0, NotChecked=0, Total=812 [2020-10-27 20:24:51,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461 states. [2020-10-27 20:24:51,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461 to 251. [2020-10-27 20:24:51,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 251 states. [2020-10-27 20:24:51,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 322 transitions. [2020-10-27 20:24:51,116 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 322 transitions. Word has length 28 [2020-10-27 20:24:51,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:24:51,116 INFO L481 AbstractCegarLoop]: Abstraction has 251 states and 322 transitions. [2020-10-27 20:24:51,116 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 20:24:51,116 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 322 transitions. [2020-10-27 20:24:51,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-27 20:24:51,117 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:24:51,117 INFO L422 BasicCegarLoop]: trace histogram [12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:24:51,117 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-27 20:24:51,117 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:24:51,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:24:51,118 INFO L82 PathProgramCache]: Analyzing trace with hash 1899795762, now seen corresponding path program 12 times [2020-10-27 20:24:51,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:24:51,118 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1528703778] [2020-10-27 20:24:51,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:24:51,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:24:51,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:51,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:51,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:52,445 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:24:52,445 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-27 20:24:52,445 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:24:52,445 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1315 [2020-10-27 20:24:52,446 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:24:52,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 20:24:52,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:24:52,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-27 20:24:52,446 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:24:52,784 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:24:52,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:24:52,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:52,790 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:24:52,790 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:24:52,790 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:24:52,790 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:24:52,790 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:24:52,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:24:52,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:24:52,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:24:52,791 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:24:52,793 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:24:52,794 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1528703778] [2020-10-27 20:24:52,794 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:24:52,794 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-27 20:24:52,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702027569] [2020-10-27 20:24:52,794 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-27 20:24:52,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:24:52,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-27 20:24:52,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2020-10-27 20:24:52,795 INFO L87 Difference]: Start difference. First operand 251 states and 322 transitions. Second operand 17 states. [2020-10-27 20:24:55,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:24:55,171 INFO L93 Difference]: Finished difference Result 532 states and 723 transitions. [2020-10-27 20:24:55,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 20:24:55,172 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 29 [2020-10-27 20:24:55,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:24:55,175 INFO L225 Difference]: With dead ends: 532 [2020-10-27 20:24:55,175 INFO L226 Difference]: Without dead ends: 488 [2020-10-27 20:24:55,178 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=89, Invalid=841, Unknown=0, NotChecked=0, Total=930 [2020-10-27 20:24:55,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 488 states. [2020-10-27 20:24:55,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 488 to 262. [2020-10-27 20:24:55,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 262 states. [2020-10-27 20:24:55,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 338 transitions. [2020-10-27 20:24:55,212 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 338 transitions. Word has length 29 [2020-10-27 20:24:55,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:24:55,212 INFO L481 AbstractCegarLoop]: Abstraction has 262 states and 338 transitions. [2020-10-27 20:24:55,213 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-27 20:24:55,213 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 338 transitions. [2020-10-27 20:24:55,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-27 20:24:55,213 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:24:55,213 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:24:55,214 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-27 20:24:55,214 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:24:55,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:24:55,214 INFO L82 PathProgramCache]: Analyzing trace with hash -308776060, now seen corresponding path program 10 times [2020-10-27 20:24:55,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:24:55,218 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1193424300] [2020-10-27 20:24:55,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:24:55,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:24:55,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:55,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:55,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:55,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:56,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:25:00,118 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:25:00,118 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-27 20:25:00,118 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 20:25:00,118 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4887 [2020-10-27 20:25:00,118 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:25:00,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 20:25:00,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-27 20:25:00,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 20:25:00,118 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:25:00,242 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:25:00,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:25:00,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:25:00,247 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:25:00,247 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:25:00,247 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:25:00,247 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:25:00,247 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:25:00,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:25:00,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:25:00,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:25:00,248 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:25:00,251 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-27 20:25:00,251 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1193424300] [2020-10-27 20:25:00,252 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:25:00,252 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 20:25:00,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384311663] [2020-10-27 20:25:00,252 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 20:25:00,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:25:00,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 20:25:00,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-27 20:25:00,253 INFO L87 Difference]: Start difference. First operand 262 states and 338 transitions. Second operand 9 states. [2020-10-27 20:25:01,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:25:01,078 INFO L93 Difference]: Finished difference Result 343 states and 434 transitions. [2020-10-27 20:25:01,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 20:25:01,079 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 30 [2020-10-27 20:25:01,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:25:01,082 INFO L225 Difference]: With dead ends: 343 [2020-10-27 20:25:01,082 INFO L226 Difference]: Without dead ends: 227 [2020-10-27 20:25:01,082 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-10-27 20:25:01,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2020-10-27 20:25:01,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 189. [2020-10-27 20:25:01,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2020-10-27 20:25:01,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 237 transitions. [2020-10-27 20:25:01,114 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 237 transitions. Word has length 30 [2020-10-27 20:25:01,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:25:01,114 INFO L481 AbstractCegarLoop]: Abstraction has 189 states and 237 transitions. [2020-10-27 20:25:01,114 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 20:25:01,114 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 237 transitions. [2020-10-27 20:25:01,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-27 20:25:01,115 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:25:01,115 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:25:01,115 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-27 20:25:01,116 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:25:01,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:25:01,116 INFO L82 PathProgramCache]: Analyzing trace with hash -1820028318, now seen corresponding path program 11 times [2020-10-27 20:25:01,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:25:01,117 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [143801356] [2020-10-27 20:25:01,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:25:01,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:25:01,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:25:01,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:25:01,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:25:02,588 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:25:02,588 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-27 20:25:02,588 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:25:02,588 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1453 [2020-10-27 20:25:02,589 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:25:02,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 20:25:02,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-27 20:25:02,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 20:25:02,590 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 20:25:02,714 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:25:02,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:25:02,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:25:02,719 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:25:02,719 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:25:02,719 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:25:02,720 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:25:02,720 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:25:02,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:25:02,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:25:02,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:25:02,720 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:25:02,724 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-27 20:25:02,725 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [143801356] [2020-10-27 20:25:02,725 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:25:02,725 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 20:25:02,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427245625] [2020-10-27 20:25:02,725 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 20:25:02,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:25:02,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 20:25:02,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-27 20:25:02,726 INFO L87 Difference]: Start difference. First operand 189 states and 237 transitions. Second operand 8 states. [2020-10-27 20:25:03,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:25:03,299 INFO L93 Difference]: Finished difference Result 288 states and 376 transitions. [2020-10-27 20:25:03,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 20:25:03,299 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 30 [2020-10-27 20:25:03,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:25:03,301 INFO L225 Difference]: With dead ends: 288 [2020-10-27 20:25:03,302 INFO L226 Difference]: Without dead ends: 271 [2020-10-27 20:25:03,302 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2020-10-27 20:25:03,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2020-10-27 20:25:03,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 251. [2020-10-27 20:25:03,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 251 states. [2020-10-27 20:25:03,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 314 transitions. [2020-10-27 20:25:03,333 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 314 transitions. Word has length 30 [2020-10-27 20:25:03,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:25:03,333 INFO L481 AbstractCegarLoop]: Abstraction has 251 states and 314 transitions. [2020-10-27 20:25:03,333 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 20:25:03,333 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 314 transitions. [2020-10-27 20:25:03,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-27 20:25:03,334 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:25:03,334 INFO L422 BasicCegarLoop]: trace histogram [13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:25:03,334 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-27 20:25:03,334 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:25:03,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:25:03,335 INFO L82 PathProgramCache]: Analyzing trace with hash 1422469348, now seen corresponding path program 13 times [2020-10-27 20:25:03,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:25:03,335 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1274179770] [2020-10-27 20:25:03,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:25:03,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:25:03,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:25:03,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:25:03,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:25:04,469 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:25:04,469 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-27 20:25:04,469 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:25:04,469 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1122 [2020-10-27 20:25:04,469 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:25:04,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 20:25:04,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:25:04,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-27 20:25:04,470 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:25:04,830 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:25:04,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:25:04,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:25:04,835 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:25:04,835 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:25:04,835 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:25:04,835 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:25:04,836 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:25:04,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:25:04,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:25:04,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:25:04,836 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:25:04,839 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:25:04,839 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1274179770] [2020-10-27 20:25:04,839 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:25:04,840 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-27 20:25:04,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900983707] [2020-10-27 20:25:04,840 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-27 20:25:04,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:25:04,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-27 20:25:04,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2020-10-27 20:25:04,841 INFO L87 Difference]: Start difference. First operand 251 states and 314 transitions. Second operand 17 states. [2020-10-27 20:25:07,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:25:07,421 INFO L93 Difference]: Finished difference Result 461 states and 600 transitions. [2020-10-27 20:25:07,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 20:25:07,422 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 30 [2020-10-27 20:25:07,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:25:07,424 INFO L225 Difference]: With dead ends: 461 [2020-10-27 20:25:07,425 INFO L226 Difference]: Without dead ends: 452 [2020-10-27 20:25:07,425 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=87, Invalid=843, Unknown=0, NotChecked=0, Total=930 [2020-10-27 20:25:07,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 452 states. [2020-10-27 20:25:07,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 452 to 254. [2020-10-27 20:25:07,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 254 states. [2020-10-27 20:25:07,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 318 transitions. [2020-10-27 20:25:07,458 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 318 transitions. Word has length 30 [2020-10-27 20:25:07,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:25:07,459 INFO L481 AbstractCegarLoop]: Abstraction has 254 states and 318 transitions. [2020-10-27 20:25:07,459 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-27 20:25:07,459 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 318 transitions. [2020-10-27 20:25:07,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-27 20:25:07,460 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:25:07,460 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:25:07,460 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-27 20:25:07,460 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:25:07,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:25:07,461 INFO L82 PathProgramCache]: Analyzing trace with hash -2067445233, now seen corresponding path program 12 times [2020-10-27 20:25:07,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:25:07,461 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1704043446] [2020-10-27 20:25:07,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:25:07,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:25:07,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:25:07,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:25:07,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:25:07,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:25:08,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:25:12,478 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:25:12,479 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-27 20:25:12,479 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 20:25:12,479 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-27 20:25:12,479 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:25:12,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 20:25:12,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-27 20:25:12,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 20:25:12,479 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:25:12,693 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:25:12,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:25:12,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:25:12,701 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:25:12,701 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:25:12,702 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:25:12,702 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 20:25:12,702 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:25:12,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:25:12,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:25:12,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:25:12,703 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:25:12,709 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-10-27 20:25:12,711 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1704043446] [2020-10-27 20:25:12,712 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:25:12,712 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 20:25:12,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155647691] [2020-10-27 20:25:12,715 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 20:25:12,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:25:12,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 20:25:12,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-27 20:25:12,716 INFO L87 Difference]: Start difference. First operand 254 states and 318 transitions. Second operand 11 states. [2020-10-27 20:25:13,606 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2020-10-27 20:25:16,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:25:16,710 INFO L93 Difference]: Finished difference Result 365 states and 440 transitions. [2020-10-27 20:25:16,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-27 20:25:16,711 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 31 [2020-10-27 20:25:16,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:25:16,714 INFO L225 Difference]: With dead ends: 365 [2020-10-27 20:25:16,714 INFO L226 Difference]: Without dead ends: 343 [2020-10-27 20:25:16,715 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=170, Invalid=641, Unknown=1, NotChecked=0, Total=812 [2020-10-27 20:25:16,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2020-10-27 20:25:16,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 242. [2020-10-27 20:25:16,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 242 states. [2020-10-27 20:25:16,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 300 transitions. [2020-10-27 20:25:16,748 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 300 transitions. Word has length 31 [2020-10-27 20:25:16,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:25:16,748 INFO L481 AbstractCegarLoop]: Abstraction has 242 states and 300 transitions. [2020-10-27 20:25:16,748 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 20:25:16,748 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 300 transitions. [2020-10-27 20:25:16,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-27 20:25:16,749 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:25:16,749 INFO L422 BasicCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:25:16,749 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-27 20:25:16,749 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:25:16,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:25:16,750 INFO L82 PathProgramCache]: Analyzing trace with hash -489747598, now seen corresponding path program 14 times [2020-10-27 20:25:16,750 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:25:16,750 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1233503664] [2020-10-27 20:25:16,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:25:16,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:25:16,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:25:16,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:25:17,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:25:18,013 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:25:18,014 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-27 20:25:18,014 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:25:18,014 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1250 [2020-10-27 20:25:18,014 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:25:18,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-27 20:25:18,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:25:18,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-27 20:25:18,014 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:25:18,552 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:25:18,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:25:18,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:25:18,558 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:25:18,558 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:25:18,558 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:25:18,558 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:25:18,558 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:25:18,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:25:18,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:25:18,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:25:18,559 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:25:18,564 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:25:18,564 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1233503664] [2020-10-27 20:25:18,564 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:25:18,564 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-27 20:25:18,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549188462] [2020-10-27 20:25:18,566 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-27 20:25:18,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:25:18,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-27 20:25:18,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2020-10-27 20:25:18,567 INFO L87 Difference]: Start difference. First operand 242 states and 300 transitions. Second operand 19 states. [2020-10-27 20:25:21,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:25:21,673 INFO L93 Difference]: Finished difference Result 557 states and 734 transitions. [2020-10-27 20:25:21,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 20:25:21,674 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 31 [2020-10-27 20:25:21,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:25:21,676 INFO L225 Difference]: With dead ends: 557 [2020-10-27 20:25:21,676 INFO L226 Difference]: Without dead ends: 502 [2020-10-27 20:25:21,677 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=101, Invalid=1089, Unknown=0, NotChecked=0, Total=1190 [2020-10-27 20:25:21,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 502 states. [2020-10-27 20:25:21,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 502 to 261. [2020-10-27 20:25:21,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 261 states. [2020-10-27 20:25:21,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 326 transitions. [2020-10-27 20:25:21,712 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 326 transitions. Word has length 31 [2020-10-27 20:25:21,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:25:21,712 INFO L481 AbstractCegarLoop]: Abstraction has 261 states and 326 transitions. [2020-10-27 20:25:21,712 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-27 20:25:21,712 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 326 transitions. [2020-10-27 20:25:21,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-27 20:25:21,713 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:25:21,713 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:25:21,714 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-27 20:25:21,714 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:25:21,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:25:21,714 INFO L82 PathProgramCache]: Analyzing trace with hash -32003006, now seen corresponding path program 13 times [2020-10-27 20:25:21,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:25:21,714 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [136914020] [2020-10-27 20:25:21,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:25:21,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:25:21,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:25:21,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:25:22,665 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:25:22,665 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-27 20:25:22,665 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:25:22,665 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 928 [2020-10-27 20:25:22,665 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:25:22,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-27 20:25:22,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:25:22,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-27 20:25:22,665 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:25:22,989 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:25:22,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:25:22,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:25:22,993 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:25:22,993 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:25:22,993 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:25:22,993 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:25:22,993 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:25:22,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:25:22,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:25:22,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:25:22,994 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:25:22,998 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-27 20:25:22,998 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [136914020] [2020-10-27 20:25:22,998 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:25:22,998 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 20:25:22,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329667876] [2020-10-27 20:25:22,998 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 20:25:22,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:25:22,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 20:25:22,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-10-27 20:25:22,999 INFO L87 Difference]: Start difference. First operand 261 states and 326 transitions. Second operand 11 states. [2020-10-27 20:25:23,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:25:23,614 INFO L93 Difference]: Finished difference Result 275 states and 339 transitions. [2020-10-27 20:25:23,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 20:25:23,614 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 32 [2020-10-27 20:25:23,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:25:23,615 INFO L225 Difference]: With dead ends: 275 [2020-10-27 20:25:23,616 INFO L226 Difference]: Without dead ends: 252 [2020-10-27 20:25:23,616 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 7 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2020-10-27 20:25:23,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2020-10-27 20:25:23,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 252. [2020-10-27 20:25:23,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 252 states. [2020-10-27 20:25:23,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 316 transitions. [2020-10-27 20:25:23,648 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 316 transitions. Word has length 32 [2020-10-27 20:25:23,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:25:23,648 INFO L481 AbstractCegarLoop]: Abstraction has 252 states and 316 transitions. [2020-10-27 20:25:23,648 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 20:25:23,648 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 316 transitions. [2020-10-27 20:25:23,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-27 20:25:23,649 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:25:23,649 INFO L422 BasicCegarLoop]: trace histogram [15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:25:23,649 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-27 20:25:23,649 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:25:23,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:25:23,650 INFO L82 PathProgramCache]: Analyzing trace with hash 361069220, now seen corresponding path program 15 times [2020-10-27 20:25:23,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:25:23,650 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [656496608] [2020-10-27 20:25:23,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:25:23,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:25:23,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:25:23,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:25:23,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:25:25,535 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:25:25,535 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-27 20:25:25,536 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:25:25,536 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1873 [2020-10-27 20:25:25,536 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:25:25,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-27 20:25:25,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:25:25,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-27 20:25:25,536 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:25:25,951 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:25:25,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:25:25,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:25:25,958 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:25:25,958 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:25:25,959 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:25:25,959 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:25:25,959 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:25:25,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:25:25,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:25:25,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:25:25,959 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:25:25,963 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:25:25,965 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [656496608] [2020-10-27 20:25:25,965 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:25:25,965 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-27 20:25:25,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037695650] [2020-10-27 20:25:25,965 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-27 20:25:25,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:25:25,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-27 20:25:25,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2020-10-27 20:25:25,966 INFO L87 Difference]: Start difference. First operand 252 states and 316 transitions. Second operand 20 states. [2020-10-27 20:25:29,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:25:29,397 INFO L93 Difference]: Finished difference Result 549 states and 727 transitions. [2020-10-27 20:25:29,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 20:25:29,398 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 32 [2020-10-27 20:25:29,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:25:29,401 INFO L225 Difference]: With dead ends: 549 [2020-10-27 20:25:29,401 INFO L226 Difference]: Without dead ends: 499 [2020-10-27 20:25:29,403 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=107, Invalid=1225, Unknown=0, NotChecked=0, Total=1332 [2020-10-27 20:25:29,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2020-10-27 20:25:29,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 263. [2020-10-27 20:25:29,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 263 states. [2020-10-27 20:25:29,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 331 transitions. [2020-10-27 20:25:29,441 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 331 transitions. Word has length 32 [2020-10-27 20:25:29,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:25:29,441 INFO L481 AbstractCegarLoop]: Abstraction has 263 states and 331 transitions. [2020-10-27 20:25:29,441 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-27 20:25:29,441 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 331 transitions. [2020-10-27 20:25:29,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-27 20:25:29,442 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:25:29,442 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:25:29,443 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-27 20:25:29,443 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:25:29,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:25:29,443 INFO L82 PathProgramCache]: Analyzing trace with hash 1620763663, now seen corresponding path program 14 times [2020-10-27 20:25:29,443 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:25:29,443 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [683739367] [2020-10-27 20:25:29,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:25:29,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:25:29,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:25:29,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:25:29,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:25:29,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:25:30,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:25:30,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:25:34,462 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:25:34,462 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-27 20:25:34,462 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 20:25:34,462 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-27 20:25:34,462 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:25:34,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 20:25:34,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-27 20:25:34,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-27 20:25:34,463 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:25:34,627 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:25:34,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:25:34,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:25:34,633 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:25:34,633 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:25:34,633 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:25:34,633 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:25:34,633 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:25:34,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:25:34,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:25:34,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:25:34,634 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:25:34,637 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-10-27 20:25:34,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [683739367] [2020-10-27 20:25:34,637 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:25:34,637 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 20:25:34,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946990453] [2020-10-27 20:25:34,637 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 20:25:34,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:25:34,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 20:25:34,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-27 20:25:34,638 INFO L87 Difference]: Start difference. First operand 263 states and 331 transitions. Second operand 10 states. [2020-10-27 20:25:35,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:25:35,374 INFO L93 Difference]: Finished difference Result 474 states and 552 transitions. [2020-10-27 20:25:35,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 20:25:35,375 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 33 [2020-10-27 20:25:35,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:25:35,377 INFO L225 Difference]: With dead ends: 474 [2020-10-27 20:25:35,377 INFO L226 Difference]: Without dead ends: 467 [2020-10-27 20:25:35,378 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2020-10-27 20:25:35,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 467 states. [2020-10-27 20:25:35,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 467 to 294. [2020-10-27 20:25:35,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 294 states. [2020-10-27 20:25:35,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 366 transitions. [2020-10-27 20:25:35,415 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 366 transitions. Word has length 33 [2020-10-27 20:25:35,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:25:35,416 INFO L481 AbstractCegarLoop]: Abstraction has 294 states and 366 transitions. [2020-10-27 20:25:35,416 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 20:25:35,416 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 366 transitions. [2020-10-27 20:25:35,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-27 20:25:35,416 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:25:35,417 INFO L422 BasicCegarLoop]: trace histogram [16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:25:35,417 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-27 20:25:35,417 INFO L429 AbstractCegarLoop]: === Iteration 42 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:25:35,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:25:35,417 INFO L82 PathProgramCache]: Analyzing trace with hash 966586802, now seen corresponding path program 16 times [2020-10-27 20:25:35,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:25:35,417 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [275446653] [2020-10-27 20:25:35,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:25:35,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:25:35,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:25:35,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:25:35,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:25:37,103 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:25:37,104 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-27 20:25:37,104 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:25:37,104 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1673 [2020-10-27 20:25:37,104 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:25:37,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-27 20:25:37,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:25:37,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-27 20:25:37,104 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:25:37,610 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:25:37,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:25:37,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:25:37,617 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:25:37,617 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:25:37,617 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:25:37,618 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:25:37,618 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:25:37,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:25:37,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:25:37,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:25:37,618 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:25:37,622 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:25:37,622 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [275446653] [2020-10-27 20:25:37,622 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:25:37,622 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-27 20:25:37,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788517082] [2020-10-27 20:25:37,623 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-27 20:25:37,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:25:37,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-27 20:25:37,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2020-10-27 20:25:37,624 INFO L87 Difference]: Start difference. First operand 294 states and 366 transitions. Second operand 21 states. [2020-10-27 20:25:41,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:25:41,550 INFO L93 Difference]: Finished difference Result 651 states and 862 transitions. [2020-10-27 20:25:41,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-27 20:25:41,551 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 33 [2020-10-27 20:25:41,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:25:41,554 INFO L225 Difference]: With dead ends: 651 [2020-10-27 20:25:41,554 INFO L226 Difference]: Without dead ends: 594 [2020-10-27 20:25:41,555 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=113, Invalid=1369, Unknown=0, NotChecked=0, Total=1482 [2020-10-27 20:25:41,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 594 states. [2020-10-27 20:25:41,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 594 to 305. [2020-10-27 20:25:41,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 305 states. [2020-10-27 20:25:41,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 381 transitions. [2020-10-27 20:25:41,597 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 381 transitions. Word has length 33 [2020-10-27 20:25:41,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:25:41,597 INFO L481 AbstractCegarLoop]: Abstraction has 305 states and 381 transitions. [2020-10-27 20:25:41,597 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-27 20:25:41,597 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 381 transitions. [2020-10-27 20:25:41,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-27 20:25:41,598 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:25:41,598 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:25:41,598 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-27 20:25:41,598 INFO L429 AbstractCegarLoop]: === Iteration 43 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:25:41,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:25:41,599 INFO L82 PathProgramCache]: Analyzing trace with hash -437899485, now seen corresponding path program 15 times [2020-10-27 20:25:41,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:25:41,599 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2013813684] [2020-10-27 20:25:41,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:25:41,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:25:41,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:25:41,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:25:42,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:25:43,351 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:25:43,351 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-27 20:25:43,351 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:25:43,351 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1728 [2020-10-27 20:25:43,351 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:25:43,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 20:25:43,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-27 20:25:43,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 20:25:43,352 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:25:43,486 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:25:43,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:25:43,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:25:43,493 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:25:43,493 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:25:43,493 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:25:43,493 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:25:43,494 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:25:43,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:25:43,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:25:43,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:25:43,494 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:25:43,498 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-10-27 20:25:43,498 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2013813684] [2020-10-27 20:25:43,498 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:25:43,499 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 20:25:43,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998778420] [2020-10-27 20:25:43,499 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 20:25:43,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:25:43,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 20:25:43,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-27 20:25:43,500 INFO L87 Difference]: Start difference. First operand 305 states and 381 transitions. Second operand 9 states. [2020-10-27 20:25:44,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:25:44,197 INFO L93 Difference]: Finished difference Result 427 states and 551 transitions. [2020-10-27 20:25:44,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 20:25:44,198 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 34 [2020-10-27 20:25:44,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:25:44,200 INFO L225 Difference]: With dead ends: 427 [2020-10-27 20:25:44,200 INFO L226 Difference]: Without dead ends: 409 [2020-10-27 20:25:44,201 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-10-27 20:25:44,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 409 states. [2020-10-27 20:25:44,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 409 to 366. [2020-10-27 20:25:44,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 366 states. [2020-10-27 20:25:44,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 460 transitions. [2020-10-27 20:25:44,252 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 460 transitions. Word has length 34 [2020-10-27 20:25:44,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:25:44,253 INFO L481 AbstractCegarLoop]: Abstraction has 366 states and 460 transitions. [2020-10-27 20:25:44,253 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 20:25:44,253 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 460 transitions. [2020-10-27 20:25:44,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-27 20:25:44,254 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:25:44,254 INFO L422 BasicCegarLoop]: trace histogram [17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:25:44,254 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-27 20:25:44,254 INFO L429 AbstractCegarLoop]: === Iteration 44 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:25:44,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:25:44,255 INFO L82 PathProgramCache]: Analyzing trace with hash -1737204636, now seen corresponding path program 17 times [2020-10-27 20:25:44,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:25:44,255 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1627956220] [2020-10-27 20:25:44,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:25:44,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:25:44,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:25:44,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:25:44,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:25:46,319 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:25:46,319 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-27 20:25:46,319 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:25:46,319 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2050 [2020-10-27 20:25:46,320 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:25:46,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-27 20:25:46,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:25:46,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-27 20:25:46,320 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:25:46,869 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:25:46,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:25:46,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:25:46,874 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:25:46,874 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:25:46,874 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:25:46,874 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 20:25:46,874 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:25:46,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:25:46,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:25:46,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:25:46,874 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:25:46,877 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:25:46,878 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1627956220] [2020-10-27 20:25:46,878 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:25:46,878 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-27 20:25:46,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452788041] [2020-10-27 20:25:46,878 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-27 20:25:46,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:25:46,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-27 20:25:46,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2020-10-27 20:25:46,879 INFO L87 Difference]: Start difference. First operand 366 states and 460 transitions. Second operand 22 states. [2020-10-27 20:25:51,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:25:51,188 INFO L93 Difference]: Finished difference Result 783 states and 1040 transitions. [2020-10-27 20:25:51,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-27 20:25:51,191 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 34 [2020-10-27 20:25:51,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:25:51,194 INFO L225 Difference]: With dead ends: 783 [2020-10-27 20:25:51,194 INFO L226 Difference]: Without dead ends: 721 [2020-10-27 20:25:51,195 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=119, Invalid=1521, Unknown=0, NotChecked=0, Total=1640 [2020-10-27 20:25:51,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 721 states. [2020-10-27 20:25:51,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 721 to 379. [2020-10-27 20:25:51,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 379 states. [2020-10-27 20:25:51,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 478 transitions. [2020-10-27 20:25:51,248 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 478 transitions. Word has length 34 [2020-10-27 20:25:51,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:25:51,248 INFO L481 AbstractCegarLoop]: Abstraction has 379 states and 478 transitions. [2020-10-27 20:25:51,248 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-27 20:25:51,248 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 478 transitions. [2020-10-27 20:25:51,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-27 20:25:51,250 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:25:51,250 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:25:51,250 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-27 20:25:51,250 INFO L429 AbstractCegarLoop]: === Iteration 45 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:25:51,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:25:51,250 INFO L82 PathProgramCache]: Analyzing trace with hash -44930766, now seen corresponding path program 16 times [2020-10-27 20:25:51,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:25:51,251 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [948020099] [2020-10-27 20:25:51,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:25:51,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:25:51,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:25:51,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:25:51,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:25:51,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:25:52,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:25:56,271 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:25:56,271 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-27 20:25:56,271 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 20:25:56,271 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-27 20:25:56,271 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:25:56,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 20:25:56,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-27 20:25:56,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-27 20:25:56,271 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:25:56,462 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:25:56,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:25:56,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:25:56,467 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:25:56,467 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:25:56,467 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:25:56,467 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:25:56,467 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:25:56,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:25:56,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:25:56,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:25:56,468 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:25:56,470 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-10-27 20:25:56,471 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [948020099] [2020-10-27 20:25:56,471 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:25:56,471 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 20:25:56,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788648271] [2020-10-27 20:25:56,471 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 20:25:56,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:25:56,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 20:25:56,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-27 20:25:56,472 INFO L87 Difference]: Start difference. First operand 379 states and 478 transitions. Second operand 11 states. [2020-10-27 20:25:57,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:25:57,660 INFO L93 Difference]: Finished difference Result 503 states and 622 transitions. [2020-10-27 20:25:57,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 20:25:57,661 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 35 [2020-10-27 20:25:57,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:25:57,663 INFO L225 Difference]: With dead ends: 503 [2020-10-27 20:25:57,663 INFO L226 Difference]: Without dead ends: 393 [2020-10-27 20:25:57,664 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=93, Invalid=507, Unknown=0, NotChecked=0, Total=600 [2020-10-27 20:25:57,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2020-10-27 20:25:57,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 339. [2020-10-27 20:25:57,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 339 states. [2020-10-27 20:25:57,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 419 transitions. [2020-10-27 20:25:57,713 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 419 transitions. Word has length 35 [2020-10-27 20:25:57,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:25:57,713 INFO L481 AbstractCegarLoop]: Abstraction has 339 states and 419 transitions. [2020-10-27 20:25:57,713 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 20:25:57,713 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 419 transitions. [2020-10-27 20:25:57,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-27 20:25:57,714 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:25:57,714 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:25:57,714 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-27 20:25:57,715 INFO L429 AbstractCegarLoop]: === Iteration 46 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:25:57,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:25:57,715 INFO L82 PathProgramCache]: Analyzing trace with hash -580698830, now seen corresponding path program 17 times [2020-10-27 20:25:57,715 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:25:57,715 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1534238524] [2020-10-27 20:25:57,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:25:57,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:25:57,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:25:57,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:25:57,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:25:58,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:25:58,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:26:02,733 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:26:02,734 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-27 20:26:02,734 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 20:26:02,734 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-27 20:26:02,734 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:26:02,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 20:26:02,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-27 20:26:02,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 20:26:02,734 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:26:02,985 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:26:02,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:26:02,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:26:02,991 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:26:02,991 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:26:02,992 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:26:02,992 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:26:02,992 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:26:02,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:26:02,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:26:02,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:26:02,992 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:26:02,996 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-10-27 20:26:02,996 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1534238524] [2020-10-27 20:26:02,996 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:26:02,997 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 20:26:02,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027514746] [2020-10-27 20:26:02,997 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 20:26:02,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:26:02,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 20:26:02,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-10-27 20:26:02,998 INFO L87 Difference]: Start difference. First operand 339 states and 419 transitions. Second operand 13 states. [2020-10-27 20:26:04,052 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2020-10-27 20:26:04,374 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2020-10-27 20:26:07,151 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-10-27 20:26:11,773 WARN L193 SmtUtils]: Spent 2.21 s on a formula simplification that was a NOOP. DAG size: 63 [2020-10-27 20:26:12,123 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2020-10-27 20:26:13,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:26:13,119 INFO L93 Difference]: Finished difference Result 540 states and 635 transitions. [2020-10-27 20:26:13,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-27 20:26:13,120 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 35 [2020-10-27 20:26:13,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:26:13,123 INFO L225 Difference]: With dead ends: 540 [2020-10-27 20:26:13,123 INFO L226 Difference]: Without dead ends: 515 [2020-10-27 20:26:13,124 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=223, Invalid=966, Unknown=1, NotChecked=0, Total=1190 [2020-10-27 20:26:13,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 515 states. [2020-10-27 20:26:13,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 515 to 325. [2020-10-27 20:26:13,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 325 states. [2020-10-27 20:26:13,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 399 transitions. [2020-10-27 20:26:13,174 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 399 transitions. Word has length 35 [2020-10-27 20:26:13,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:26:13,174 INFO L481 AbstractCegarLoop]: Abstraction has 325 states and 399 transitions. [2020-10-27 20:26:13,174 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 20:26:13,175 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 399 transitions. [2020-10-27 20:26:13,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-27 20:26:13,175 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:26:13,176 INFO L422 BasicCegarLoop]: trace histogram [18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:26:13,176 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-27 20:26:13,176 INFO L429 AbstractCegarLoop]: === Iteration 47 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:26:13,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:26:13,176 INFO L82 PathProgramCache]: Analyzing trace with hash 344606706, now seen corresponding path program 18 times [2020-10-27 20:26:13,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:26:13,177 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [130627491] [2020-10-27 20:26:13,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:26:13,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:26:13,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:26:13,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:26:13,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:26:15,040 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:26:15,040 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-27 20:26:15,040 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:26:15,040 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1848 [2020-10-27 20:26:15,040 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:26:15,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-27 20:26:15,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:26:15,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-27 20:26:15,040 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:26:15,612 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:26:15,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:26:15,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:26:15,617 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:26:15,617 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:26:15,617 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:26:15,617 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:26:15,617 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:26:15,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:26:15,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:26:15,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:26:15,618 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:26:15,622 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:26:15,623 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [130627491] [2020-10-27 20:26:15,623 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:26:15,623 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-27 20:26:15,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248738161] [2020-10-27 20:26:15,623 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-27 20:26:15,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:26:15,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-27 20:26:15,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2020-10-27 20:26:15,624 INFO L87 Difference]: Start difference. First operand 325 states and 399 transitions. Second operand 22 states. [2020-10-27 20:26:20,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:26:20,157 INFO L93 Difference]: Finished difference Result 600 states and 757 transitions. [2020-10-27 20:26:20,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-27 20:26:20,158 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 35 [2020-10-27 20:26:20,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:26:20,160 INFO L225 Difference]: With dead ends: 600 [2020-10-27 20:26:20,160 INFO L226 Difference]: Without dead ends: 591 [2020-10-27 20:26:20,161 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=117, Invalid=1523, Unknown=0, NotChecked=0, Total=1640 [2020-10-27 20:26:20,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 591 states. [2020-10-27 20:26:20,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 591 to 328. [2020-10-27 20:26:20,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 328 states. [2020-10-27 20:26:20,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 403 transitions. [2020-10-27 20:26:20,211 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 403 transitions. Word has length 35 [2020-10-27 20:26:20,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:26:20,211 INFO L481 AbstractCegarLoop]: Abstraction has 328 states and 403 transitions. [2020-10-27 20:26:20,211 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-27 20:26:20,211 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 403 transitions. [2020-10-27 20:26:20,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-27 20:26:20,212 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:26:20,212 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:26:20,213 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-27 20:26:20,213 INFO L429 AbstractCegarLoop]: === Iteration 48 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:26:20,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:26:20,213 INFO L82 PathProgramCache]: Analyzing trace with hash -1723981582, now seen corresponding path program 18 times [2020-10-27 20:26:20,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:26:20,213 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1869753582] [2020-10-27 20:26:20,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:26:20,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:26:20,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:26:20,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:26:20,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:26:20,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:26:20,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:26:23,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:26:25,239 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:26:25,239 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-27 20:26:25,239 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 20:26:25,239 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-27 20:26:25,240 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:26:25,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 20:26:25,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-27 20:26:25,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 20:26:25,240 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:26:25,451 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:26:25,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:26:25,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:26:25,457 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:26:25,457 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:26:25,457 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:26:25,457 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:26:25,457 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:26:25,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:26:25,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:26:25,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:26:25,458 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:26:25,461 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2020-10-27 20:26:25,461 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1869753582] [2020-10-27 20:26:25,461 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:26:25,461 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 20:26:25,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218972390] [2020-10-27 20:26:25,462 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 20:26:25,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:26:25,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 20:26:25,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-10-27 20:26:25,462 INFO L87 Difference]: Start difference. First operand 328 states and 403 transitions. Second operand 11 states. [2020-10-27 20:26:26,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:26:26,365 INFO L93 Difference]: Finished difference Result 592 states and 678 transitions. [2020-10-27 20:26:26,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 20:26:26,366 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 36 [2020-10-27 20:26:26,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:26:26,370 INFO L225 Difference]: With dead ends: 592 [2020-10-27 20:26:26,370 INFO L226 Difference]: Without dead ends: 585 [2020-10-27 20:26:26,370 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2020-10-27 20:26:26,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 585 states. [2020-10-27 20:26:26,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 585 to 363. [2020-10-27 20:26:26,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 363 states. [2020-10-27 20:26:26,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 442 transitions. [2020-10-27 20:26:26,423 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 442 transitions. Word has length 36 [2020-10-27 20:26:26,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:26:26,423 INFO L481 AbstractCegarLoop]: Abstraction has 363 states and 442 transitions. [2020-10-27 20:26:26,423 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 20:26:26,423 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 442 transitions. [2020-10-27 20:26:26,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-27 20:26:26,425 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:26:26,425 INFO L422 BasicCegarLoop]: trace histogram [19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:26:26,425 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-27 20:26:26,425 INFO L429 AbstractCegarLoop]: === Iteration 49 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:26:26,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:26:26,426 INFO L82 PathProgramCache]: Analyzing trace with hash 456248868, now seen corresponding path program 19 times [2020-10-27 20:26:26,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:26:26,426 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2091647411] [2020-10-27 20:26:26,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:26:26,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:26:26,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:26:26,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:26:26,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:26:27,968 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:26:27,968 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-27 20:26:27,968 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:26:27,968 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1526 [2020-10-27 20:26:27,968 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:26:27,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-27 20:26:27,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:26:27,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-27 20:26:27,969 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:26:28,567 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:26:28,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:26:28,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:26:28,572 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:26:28,572 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:26:28,572 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:26:28,572 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:26:28,573 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:26:28,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:26:28,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:26:28,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:26:28,573 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:26:28,576 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:26:28,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2091647411] [2020-10-27 20:26:28,577 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:26:28,577 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-27 20:26:28,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340579621] [2020-10-27 20:26:28,577 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-27 20:26:28,577 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:26:28,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-27 20:26:28,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2020-10-27 20:26:28,578 INFO L87 Difference]: Start difference. First operand 363 states and 442 transitions. Second operand 23 states. [2020-10-27 20:26:33,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:26:33,569 INFO L93 Difference]: Finished difference Result 821 states and 1064 transitions. [2020-10-27 20:26:33,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-27 20:26:33,569 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 36 [2020-10-27 20:26:33,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:26:33,572 INFO L225 Difference]: With dead ends: 821 [2020-10-27 20:26:33,572 INFO L226 Difference]: Without dead ends: 750 [2020-10-27 20:26:33,573 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=123, Invalid=1683, Unknown=0, NotChecked=0, Total=1806 [2020-10-27 20:26:33,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 750 states. [2020-10-27 20:26:33,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 750 to 375. [2020-10-27 20:26:33,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 375 states. [2020-10-27 20:26:33,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375 states to 375 states and 458 transitions. [2020-10-27 20:26:33,623 INFO L78 Accepts]: Start accepts. Automaton has 375 states and 458 transitions. Word has length 36 [2020-10-27 20:26:33,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:26:33,624 INFO L481 AbstractCegarLoop]: Abstraction has 375 states and 458 transitions. [2020-10-27 20:26:33,624 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-27 20:26:33,624 INFO L276 IsEmpty]: Start isEmpty. Operand 375 states and 458 transitions. [2020-10-27 20:26:33,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-27 20:26:33,625 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:26:33,625 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:26:33,625 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-27 20:26:33,625 INFO L429 AbstractCegarLoop]: === Iteration 50 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:26:33,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:26:33,626 INFO L82 PathProgramCache]: Analyzing trace with hash 2028962994, now seen corresponding path program 19 times [2020-10-27 20:26:33,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:26:33,626 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1281607846] [2020-10-27 20:26:33,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:26:33,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:26:33,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:26:33,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:26:34,940 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:26:34,941 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-27 20:26:34,941 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:26:34,941 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1264 [2020-10-27 20:26:34,941 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:26:34,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-27 20:26:34,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:26:34,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-27 20:26:34,941 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:26:35,182 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:26:35,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:26:35,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:26:35,187 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:26:35,187 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:26:35,187 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:26:35,187 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:26:35,187 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:26:35,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:26:35,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:26:35,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:26:35,187 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:26:35,191 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-27 20:26:35,191 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1281607846] [2020-10-27 20:26:35,192 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:26:35,192 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 20:26:35,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175655873] [2020-10-27 20:26:35,192 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 20:26:35,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:26:35,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 20:26:35,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2020-10-27 20:26:35,193 INFO L87 Difference]: Start difference. First operand 375 states and 458 transitions. Second operand 11 states. [2020-10-27 20:26:35,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:26:35,848 INFO L93 Difference]: Finished difference Result 391 states and 473 transitions. [2020-10-27 20:26:35,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 20:26:35,848 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 37 [2020-10-27 20:26:35,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:26:35,851 INFO L225 Difference]: With dead ends: 391 [2020-10-27 20:26:35,851 INFO L226 Difference]: Without dead ends: 364 [2020-10-27 20:26:35,851 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2020-10-27 20:26:35,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2020-10-27 20:26:35,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 364. [2020-10-27 20:26:35,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 364 states. [2020-10-27 20:26:35,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 446 transitions. [2020-10-27 20:26:35,890 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 446 transitions. Word has length 37 [2020-10-27 20:26:35,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:26:35,890 INFO L481 AbstractCegarLoop]: Abstraction has 364 states and 446 transitions. [2020-10-27 20:26:35,890 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 20:26:35,890 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 446 transitions. [2020-10-27 20:26:35,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-27 20:26:35,891 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:26:35,891 INFO L422 BasicCegarLoop]: trace histogram [20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:26:35,891 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-10-27 20:26:35,891 INFO L429 AbstractCegarLoop]: === Iteration 51 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:26:35,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:26:35,892 INFO L82 PathProgramCache]: Analyzing trace with hash -377811406, now seen corresponding path program 20 times [2020-10-27 20:26:35,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:26:35,892 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1509734556] [2020-10-27 20:26:35,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:26:35,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:26:35,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:26:36,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:26:36,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:26:39,199 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:26:39,200 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-27 20:26:39,200 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:26:39,200 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3291 [2020-10-27 20:26:39,200 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:26:39,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-27 20:26:39,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:26:39,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-27 20:26:39,200 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:26:39,917 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:26:39,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:26:39,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:26:39,921 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:26:39,922 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:26:39,922 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:26:39,922 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:26:39,922 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:26:39,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:26:39,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:26:39,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:26:39,922 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:26:39,926 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:26:39,926 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1509734556] [2020-10-27 20:26:39,926 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:26:39,926 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-27 20:26:39,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910839242] [2020-10-27 20:26:39,927 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-27 20:26:39,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:26:39,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-27 20:26:39,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2020-10-27 20:26:39,927 INFO L87 Difference]: Start difference. First operand 364 states and 446 transitions. Second operand 25 states. [2020-10-27 20:26:45,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:26:45,607 INFO L93 Difference]: Finished difference Result 864 states and 1131 transitions. [2020-10-27 20:26:45,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-27 20:26:45,607 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 37 [2020-10-27 20:26:45,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:26:45,610 INFO L225 Difference]: With dead ends: 864 [2020-10-27 20:26:45,611 INFO L226 Difference]: Without dead ends: 784 [2020-10-27 20:26:45,611 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=137, Invalid=2025, Unknown=0, NotChecked=0, Total=2162 [2020-10-27 20:26:45,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 784 states. [2020-10-27 20:26:45,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 784 to 385. [2020-10-27 20:26:45,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 385 states. [2020-10-27 20:26:45,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 474 transitions. [2020-10-27 20:26:45,672 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 474 transitions. Word has length 37 [2020-10-27 20:26:45,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:26:45,673 INFO L481 AbstractCegarLoop]: Abstraction has 385 states and 474 transitions. [2020-10-27 20:26:45,673 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-27 20:26:45,673 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 474 transitions. [2020-10-27 20:26:45,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-27 20:26:45,674 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:26:45,674 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:26:45,674 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-10-27 20:26:45,674 INFO L429 AbstractCegarLoop]: === Iteration 52 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:26:45,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:26:45,675 INFO L82 PathProgramCache]: Analyzing trace with hash -1200290430, now seen corresponding path program 20 times [2020-10-27 20:26:45,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:26:45,675 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [282238754] [2020-10-27 20:26:45,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:26:45,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:26:45,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:26:45,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:26:45,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:26:49,507 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:26:49,507 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-27 20:26:49,507 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:26:49,508 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3802 [2020-10-27 20:26:49,508 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:26:49,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 20:26:49,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-27 20:26:49,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-27 20:26:49,508 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:26:49,682 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:26:49,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:26:49,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:26:49,687 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:26:49,687 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:26:49,687 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:26:49,687 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:26:49,687 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:26:49,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:26:49,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:26:49,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:26:49,688 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:26:49,692 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-10-27 20:26:49,692 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [282238754] [2020-10-27 20:26:49,692 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:26:49,693 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 20:26:49,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100912251] [2020-10-27 20:26:49,693 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 20:26:49,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:26:49,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 20:26:49,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-27 20:26:49,694 INFO L87 Difference]: Start difference. First operand 385 states and 474 transitions. Second operand 10 states. [2020-10-27 20:26:50,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:26:50,634 INFO L93 Difference]: Finished difference Result 531 states and 676 transitions. [2020-10-27 20:26:50,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 20:26:50,635 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 38 [2020-10-27 20:26:50,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:26:50,637 INFO L225 Difference]: With dead ends: 531 [2020-10-27 20:26:50,637 INFO L226 Difference]: Without dead ends: 512 [2020-10-27 20:26:50,637 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2020-10-27 20:26:50,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 512 states. [2020-10-27 20:26:50,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 512 to 457. [2020-10-27 20:26:50,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 457 states. [2020-10-27 20:26:50,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 457 states to 457 states and 567 transitions. [2020-10-27 20:26:50,682 INFO L78 Accepts]: Start accepts. Automaton has 457 states and 567 transitions. Word has length 38 [2020-10-27 20:26:50,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:26:50,682 INFO L481 AbstractCegarLoop]: Abstraction has 457 states and 567 transitions. [2020-10-27 20:26:50,682 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 20:26:50,682 INFO L276 IsEmpty]: Start isEmpty. Operand 457 states and 567 transitions. [2020-10-27 20:26:50,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-27 20:26:50,683 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:26:50,683 INFO L422 BasicCegarLoop]: trace histogram [21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:26:50,684 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-10-27 20:26:50,684 INFO L429 AbstractCegarLoop]: === Iteration 53 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:26:50,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:26:50,684 INFO L82 PathProgramCache]: Analyzing trace with hash -463876124, now seen corresponding path program 21 times [2020-10-27 20:26:50,684 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:26:50,684 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [801137920] [2020-10-27 20:26:50,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:26:50,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:26:50,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:26:51,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:26:51,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:26:52,772 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:26:52,772 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-27 20:26:52,772 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:26:52,772 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2071 [2020-10-27 20:26:52,772 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:26:52,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-27 20:26:52,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:26:52,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-27 20:26:52,772 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:26:53,532 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:26:53,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:26:53,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:26:53,537 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:26:53,537 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:26:53,537 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:26:53,537 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:26:53,537 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:26:53,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:26:53,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:26:53,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:26:53,538 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:26:53,541 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:26:53,541 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [801137920] [2020-10-27 20:26:53,541 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:26:53,541 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-27 20:26:53,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904271339] [2020-10-27 20:26:53,542 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-27 20:26:53,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:26:53,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-27 20:26:53,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=601, Unknown=0, NotChecked=0, Total=650 [2020-10-27 20:26:53,542 INFO L87 Difference]: Start difference. First operand 457 states and 567 transitions. Second operand 26 states. [2020-10-27 20:26:59,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:26:59,714 INFO L93 Difference]: Finished difference Result 987 states and 1293 transitions. [2020-10-27 20:26:59,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-27 20:26:59,715 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 38 [2020-10-27 20:26:59,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:26:59,719 INFO L225 Difference]: With dead ends: 987 [2020-10-27 20:26:59,719 INFO L226 Difference]: Without dead ends: 911 [2020-10-27 20:26:59,720 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=143, Invalid=2209, Unknown=0, NotChecked=0, Total=2352 [2020-10-27 20:26:59,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 911 states. [2020-10-27 20:26:59,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 911 to 471. [2020-10-27 20:26:59,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 471 states. [2020-10-27 20:26:59,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 471 states to 471 states and 586 transitions. [2020-10-27 20:26:59,784 INFO L78 Accepts]: Start accepts. Automaton has 471 states and 586 transitions. Word has length 38 [2020-10-27 20:26:59,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:26:59,785 INFO L481 AbstractCegarLoop]: Abstraction has 471 states and 586 transitions. [2020-10-27 20:26:59,785 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-27 20:26:59,785 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states and 586 transitions. [2020-10-27 20:26:59,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-27 20:26:59,786 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:26:59,786 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:26:59,786 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-10-27 20:26:59,786 INFO L429 AbstractCegarLoop]: === Iteration 54 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:26:59,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:26:59,787 INFO L82 PathProgramCache]: Analyzing trace with hash -1604928529, now seen corresponding path program 21 times [2020-10-27 20:26:59,787 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:26:59,787 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [429277544] [2020-10-27 20:26:59,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:26:59,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:26:59,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:26:59,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:00,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:00,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:00,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:04,807 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:27:04,807 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-27 20:27:04,807 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 20:27:04,807 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-27 20:27:04,807 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:27:04,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 20:27:04,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-27 20:27:04,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 20:27:04,808 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:27:05,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:27:05,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:27:05,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:05,238 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:27:05,238 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:27:05,239 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:27:05,239 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:27:05,239 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:27:05,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:27:05,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:27:05,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:27:05,239 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:27:05,244 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2020-10-27 20:27:05,244 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [429277544] [2020-10-27 20:27:05,244 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:27:05,244 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 20:27:05,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930388023] [2020-10-27 20:27:05,245 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 20:27:05,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:27:05,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 20:27:05,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2020-10-27 20:27:05,246 INFO L87 Difference]: Start difference. First operand 471 states and 586 transitions. Second operand 15 states. [2020-10-27 20:27:05,686 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 47 [2020-10-27 20:27:05,820 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 47 [2020-10-27 20:27:05,959 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 47 [2020-10-27 20:27:06,293 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 50 [2020-10-27 20:27:06,605 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 56 [2020-10-27 20:27:06,753 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-10-27 20:27:09,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:27:09,308 INFO L93 Difference]: Finished difference Result 736 states and 854 transitions. [2020-10-27 20:27:09,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 20:27:09,308 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 39 [2020-10-27 20:27:09,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:27:09,311 INFO L225 Difference]: With dead ends: 736 [2020-10-27 20:27:09,311 INFO L226 Difference]: Without dead ends: 708 [2020-10-27 20:27:09,311 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=163, Invalid=649, Unknown=0, NotChecked=0, Total=812 [2020-10-27 20:27:09,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 708 states. [2020-10-27 20:27:09,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 708 to 455. [2020-10-27 20:27:09,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 455 states. [2020-10-27 20:27:09,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 455 states to 455 states and 564 transitions. [2020-10-27 20:27:09,370 INFO L78 Accepts]: Start accepts. Automaton has 455 states and 564 transitions. Word has length 39 [2020-10-27 20:27:09,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:27:09,370 INFO L481 AbstractCegarLoop]: Abstraction has 455 states and 564 transitions. [2020-10-27 20:27:09,370 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 20:27:09,370 INFO L276 IsEmpty]: Start isEmpty. Operand 455 states and 564 transitions. [2020-10-27 20:27:09,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-27 20:27:09,371 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:27:09,371 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:27:09,371 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-10-27 20:27:09,371 INFO L429 AbstractCegarLoop]: === Iteration 55 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:27:09,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:27:09,371 INFO L82 PathProgramCache]: Analyzing trace with hash -1077909201, now seen corresponding path program 22 times [2020-10-27 20:27:09,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:27:09,372 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [460164787] [2020-10-27 20:27:09,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:27:09,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:27:09,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:09,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:09,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:09,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:09,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:13,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:14,397 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:27:14,397 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-27 20:27:14,398 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 20:27:14,398 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-27 20:27:14,398 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:27:14,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 20:27:14,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-27 20:27:14,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-27 20:27:14,398 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:27:14,646 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:27:14,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:27:14,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:14,651 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:27:14,651 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:27:14,651 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:27:14,651 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:27:14,651 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:27:14,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:27:14,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:27:14,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:27:14,651 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:27:14,655 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2020-10-27 20:27:14,655 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [460164787] [2020-10-27 20:27:14,655 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:27:14,655 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 20:27:14,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260868438] [2020-10-27 20:27:14,656 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 20:27:14,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:27:14,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 20:27:14,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-10-27 20:27:14,656 INFO L87 Difference]: Start difference. First operand 455 states and 564 transitions. Second operand 12 states. [2020-10-27 20:27:15,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:27:15,878 INFO L93 Difference]: Finished difference Result 950 states and 1072 transitions. [2020-10-27 20:27:15,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 20:27:15,878 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 39 [2020-10-27 20:27:15,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:27:15,883 INFO L225 Difference]: With dead ends: 950 [2020-10-27 20:27:15,883 INFO L226 Difference]: Without dead ends: 943 [2020-10-27 20:27:15,883 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2020-10-27 20:27:15,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 943 states. [2020-10-27 20:27:15,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 943 to 504. [2020-10-27 20:27:15,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 504 states. [2020-10-27 20:27:15,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 504 states to 504 states and 618 transitions. [2020-10-27 20:27:15,937 INFO L78 Accepts]: Start accepts. Automaton has 504 states and 618 transitions. Word has length 39 [2020-10-27 20:27:15,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:27:15,938 INFO L481 AbstractCegarLoop]: Abstraction has 504 states and 618 transitions. [2020-10-27 20:27:15,938 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 20:27:15,938 INFO L276 IsEmpty]: Start isEmpty. Operand 504 states and 618 transitions. [2020-10-27 20:27:15,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-27 20:27:15,939 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:27:15,939 INFO L422 BasicCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:27:15,939 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2020-10-27 20:27:15,939 INFO L429 AbstractCegarLoop]: === Iteration 56 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:27:15,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:27:15,940 INFO L82 PathProgramCache]: Analyzing trace with hash 1163084914, now seen corresponding path program 22 times [2020-10-27 20:27:15,940 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:27:15,940 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [507750915] [2020-10-27 20:27:15,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:27:15,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:27:15,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:16,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:16,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:19,133 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:27:19,133 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-27 20:27:19,133 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:27:19,133 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3178 [2020-10-27 20:27:19,133 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:27:19,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-27 20:27:19,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:27:19,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-27 20:27:19,134 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:27:20,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:27:20,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:27:20,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:20,117 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:27:20,117 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:27:20,117 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:27:20,117 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:27:20,117 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:27:20,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:27:20,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:27:20,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:27:20,117 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:27:20,121 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:27:20,122 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [507750915] [2020-10-27 20:27:20,122 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:27:20,122 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-27 20:27:20,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585522247] [2020-10-27 20:27:20,122 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-27 20:27:20,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:27:20,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-27 20:27:20,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=651, Unknown=0, NotChecked=0, Total=702 [2020-10-27 20:27:20,123 INFO L87 Difference]: Start difference. First operand 504 states and 618 transitions. Second operand 27 states. [2020-10-27 20:27:27,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:27:27,274 INFO L93 Difference]: Finished difference Result 1093 states and 1410 transitions. [2020-10-27 20:27:27,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-27 20:27:27,274 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 39 [2020-10-27 20:27:27,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:27:27,278 INFO L225 Difference]: With dead ends: 1093 [2020-10-27 20:27:27,278 INFO L226 Difference]: Without dead ends: 1010 [2020-10-27 20:27:27,279 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=149, Invalid=2401, Unknown=0, NotChecked=0, Total=2550 [2020-10-27 20:27:27,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1010 states. [2020-10-27 20:27:27,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1010 to 518. [2020-10-27 20:27:27,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 518 states. [2020-10-27 20:27:27,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 518 states to 518 states and 637 transitions. [2020-10-27 20:27:27,334 INFO L78 Accepts]: Start accepts. Automaton has 518 states and 637 transitions. Word has length 39 [2020-10-27 20:27:27,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:27:27,334 INFO L481 AbstractCegarLoop]: Abstraction has 518 states and 637 transitions. [2020-10-27 20:27:27,334 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-27 20:27:27,334 INFO L276 IsEmpty]: Start isEmpty. Operand 518 states and 637 transitions. [2020-10-27 20:27:27,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-27 20:27:27,335 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:27:27,335 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:27:27,335 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2020-10-27 20:27:27,336 INFO L429 AbstractCegarLoop]: === Iteration 57 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:27:27,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:27:27,336 INFO L82 PathProgramCache]: Analyzing trace with hash -1703694524, now seen corresponding path program 23 times [2020-10-27 20:27:27,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:27:27,336 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2089658412] [2020-10-27 20:27:27,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:27:27,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:27:27,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:27,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:27,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:30,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:31,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:32,362 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:27:32,362 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-27 20:27:32,362 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 20:27:32,362 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-27 20:27:32,362 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:27:32,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 20:27:32,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-27 20:27:32,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-27 20:27:32,362 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:27:32,630 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:27:32,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:27:32,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:32,636 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:27:32,636 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:27:32,636 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:27:32,636 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:27:32,636 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:27:32,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:27:32,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:27:32,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:27:32,637 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:27:32,641 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-10-27 20:27:32,641 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2089658412] [2020-10-27 20:27:32,642 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:27:32,642 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 20:27:32,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240200033] [2020-10-27 20:27:32,642 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 20:27:32,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:27:32,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 20:27:32,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-10-27 20:27:32,643 INFO L87 Difference]: Start difference. First operand 518 states and 637 transitions. Second operand 13 states. [2020-10-27 20:27:34,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:27:34,449 INFO L93 Difference]: Finished difference Result 701 states and 845 transitions. [2020-10-27 20:27:34,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-27 20:27:34,450 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 40 [2020-10-27 20:27:34,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:27:34,453 INFO L225 Difference]: With dead ends: 701 [2020-10-27 20:27:34,453 INFO L226 Difference]: Without dead ends: 537 [2020-10-27 20:27:34,454 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=126, Invalid=866, Unknown=0, NotChecked=0, Total=992 [2020-10-27 20:27:34,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 537 states. [2020-10-27 20:27:34,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 537 to 460. [2020-10-27 20:27:34,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 460 states. [2020-10-27 20:27:34,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 555 transitions. [2020-10-27 20:27:34,516 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 555 transitions. Word has length 40 [2020-10-27 20:27:34,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:27:34,517 INFO L481 AbstractCegarLoop]: Abstraction has 460 states and 555 transitions. [2020-10-27 20:27:34,517 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 20:27:34,517 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 555 transitions. [2020-10-27 20:27:34,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-27 20:27:34,518 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:27:34,518 INFO L422 BasicCegarLoop]: trace histogram [23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:27:34,518 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2020-10-27 20:27:34,518 INFO L429 AbstractCegarLoop]: === Iteration 58 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:27:34,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:27:34,519 INFO L82 PathProgramCache]: Analyzing trace with hash 59269540, now seen corresponding path program 23 times [2020-10-27 20:27:34,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:27:34,519 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [363788390] [2020-10-27 20:27:34,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:27:34,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:27:34,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:34,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:35,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking...