/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SHALLOWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/eca-rers2012/Problem17_label58.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 00:20:44,065 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 00:20:44,071 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 00:20:44,135 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 00:20:44,135 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 00:20:44,142 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 00:20:44,146 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 00:20:44,151 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 00:20:44,155 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 00:20:44,162 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 00:20:44,163 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 00:20:44,165 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 00:20:44,166 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 00:20:44,169 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 00:20:44,172 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 00:20:44,174 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 00:20:44,175 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 00:20:44,179 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 00:20:44,188 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 00:20:44,202 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 00:20:44,204 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 00:20:44,205 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 00:20:44,206 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 00:20:44,208 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 00:20:44,219 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 00:20:44,219 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 00:20:44,220 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 00:20:44,221 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 00:20:44,222 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 00:20:44,224 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2020-10-27 00:20:44,232 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 00:20:44,233 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 00:20:44,234 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 00:20:44,242 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 00:20:44,299 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 00:20:44,300 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 00:20:44,305 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 00:20:44,305 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 00:20:44,305 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 00:20:44,306 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 00:20:44,306 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 00:20:44,306 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 00:20:44,306 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 00:20:44,307 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 00:20:44,308 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 00:20:44,308 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 00:20:44,309 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 00:20:44,309 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 00:20:44,309 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 00:20:44,309 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 00:20:44,309 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 00:20:44,310 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 00:20:44,310 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 00:20:44,310 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 00:20:44,310 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 00:20:44,311 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 00:20:44,311 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 00:20:44,311 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 00:20:44,311 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 00:20:44,311 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 00:20:44,312 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 00:20:44,312 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 00:20:44,312 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 00:20:44,312 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 00:20:44,813 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 00:20:44,856 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 00:20:44,860 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 00:20:44,862 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 00:20:44,862 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 00:20:44,865 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem17_label58.c [2020-10-27 00:20:44,967 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/bea4ef62c/746bdd2d0e9a4466933c6b971845b29e/FLAGc9108d234 [2020-10-27 00:20:45,991 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 00:20:45,992 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem17_label58.c [2020-10-27 00:20:46,031 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/bea4ef62c/746bdd2d0e9a4466933c6b971845b29e/FLAGc9108d234 [2020-10-27 00:20:46,506 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/bea4ef62c/746bdd2d0e9a4466933c6b971845b29e [2020-10-27 00:20:46,509 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 00:20:46,517 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 00:20:46,519 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 00:20:46,519 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 00:20:46,524 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 00:20:46,525 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 12:20:46" (1/1) ... [2020-10-27 00:20:46,529 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@30063588 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:20:46, skipping insertion in model container [2020-10-27 00:20:46,530 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 12:20:46" (1/1) ... [2020-10-27 00:20:46,540 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 00:20:46,647 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 00:20:47,813 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 00:20:47,831 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 00:20:48,409 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 00:20:48,437 INFO L208 MainTranslator]: Completed translation [2020-10-27 00:20:48,438 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:20:48 WrapperNode [2020-10-27 00:20:48,438 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 00:20:48,439 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 00:20:48,440 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 00:20:48,440 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 00:20:48,456 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:20:48" (1/1) ... [2020-10-27 00:20:48,457 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:20:48" (1/1) ... [2020-10-27 00:20:48,550 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:20:48" (1/1) ... [2020-10-27 00:20:48,551 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:20:48" (1/1) ... [2020-10-27 00:20:48,666 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:20:48" (1/1) ... [2020-10-27 00:20:48,717 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:20:48" (1/1) ... [2020-10-27 00:20:48,769 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:20:48" (1/1) ... [2020-10-27 00:20:48,798 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 00:20:48,801 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 00:20:48,801 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 00:20:48,801 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 00:20:48,802 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:20:48" (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 00:20:48,894 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 00:20:48,894 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 00:20:48,895 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 00:20:48,895 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-27 00:20:48,896 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-27 00:20:48,896 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 00:20:48,896 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-27 00:20:48,896 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-27 00:20:48,897 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 00:20:48,897 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 00:20:48,898 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 00:20:48,898 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 00:20:48,899 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 00:20:48,899 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-27 00:20:48,899 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 00:20:48,903 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 00:20:48,903 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 00:20:48,903 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 00:20:48,903 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 00:20:48,903 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 00:20:48,904 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 00:20:58,308 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 00:20:58,308 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-27 00:20:58,312 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 12:20:58 BoogieIcfgContainer [2020-10-27 00:20:58,312 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 00:20:58,314 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 00:20:58,314 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 00:20:58,318 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 00:20:58,318 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 12:20:46" (1/3) ... [2020-10-27 00:20:58,319 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@de2c578 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 12:20:58, skipping insertion in model container [2020-10-27 00:20:58,319 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:20:48" (2/3) ... [2020-10-27 00:20:58,320 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@de2c578 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 12:20:58, skipping insertion in model container [2020-10-27 00:20:58,320 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 12:20:58" (3/3) ... [2020-10-27 00:20:58,322 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem17_label58.c [2020-10-27 00:20:58,335 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 00:20:58,342 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 00:20:58,356 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 00:20:58,393 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 00:20:58,393 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 00:20:58,393 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 00:20:58,394 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 00:20:58,394 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 00:20:58,394 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 00:20:58,394 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 00:20:58,394 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 00:20:58,428 INFO L276 IsEmpty]: Start isEmpty. Operand 607 states. [2020-10-27 00:20:58,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-27 00:20:58,437 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:20:58,438 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:20:58,439 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:20:58,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:20:58,446 INFO L82 PathProgramCache]: Analyzing trace with hash 1189231218, now seen corresponding path program 1 times [2020-10-27 00:20:58,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:20:58,457 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1651070057] [2020-10-27 00:20:58,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:20:58,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:20:58,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:20:59,372 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:20:59,372 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-27 00:20:59,373 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:20:59,373 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 703 [2020-10-27 00:20:59,378 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:20:59,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 00:20:59,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:20:59,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-27 00:20:59,379 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-10-27 00:20:59,587 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:20:59,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:20:59,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:20:59,631 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:20:59,631 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:20:59,631 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:20:59,632 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-10-27 00:20:59,632 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:20:59,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:20:59,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:20:59,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:20:59,633 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:20:59,657 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 00:20:59,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1651070057] [2020-10-27 00:20:59,660 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 00:20:59,661 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-27 00:20:59,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146741407] [2020-10-27 00:20:59,667 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 00:20:59,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:20:59,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 00:20:59,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 00:20:59,687 INFO L87 Difference]: Start difference. First operand 607 states. Second operand 4 states. [2020-10-27 00:21:14,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:21:14,127 INFO L93 Difference]: Finished difference Result 1697 states and 3097 transitions. [2020-10-27 00:21:14,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 00:21:14,129 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 52 [2020-10-27 00:21:14,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:21:14,170 INFO L225 Difference]: With dead ends: 1697 [2020-10-27 00:21:14,170 INFO L226 Difference]: Without dead ends: 1013 [2020-10-27 00:21:14,188 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 00:21:14,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1013 states. [2020-10-27 00:21:14,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1013 to 1003. [2020-10-27 00:21:14,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1003 states. [2020-10-27 00:21:14,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1003 states to 1003 states and 1543 transitions. [2020-10-27 00:21:14,330 INFO L78 Accepts]: Start accepts. Automaton has 1003 states and 1543 transitions. Word has length 52 [2020-10-27 00:21:14,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:21:14,331 INFO L481 AbstractCegarLoop]: Abstraction has 1003 states and 1543 transitions. [2020-10-27 00:21:14,331 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 00:21:14,332 INFO L276 IsEmpty]: Start isEmpty. Operand 1003 states and 1543 transitions. [2020-10-27 00:21:14,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2020-10-27 00:21:14,338 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:21:14,338 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:21:14,339 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 00:21:14,339 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:21:14,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:21:14,340 INFO L82 PathProgramCache]: Analyzing trace with hash 372999698, now seen corresponding path program 1 times [2020-10-27 00:21:14,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:21:14,341 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [448081846] [2020-10-27 00:21:14,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:21:14,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:21:14,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:21:14,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:21:16,099 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:21:16,099 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 135 [2020-10-27 00:21:16,102 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 00:21:16,103 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1703 [2020-10-27 00:21:16,104 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:21:16,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 00:21:16,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:21:16,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-10-27 00:21:16,105 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 00:21:16,255 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:21:16,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:21:16,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:21:16,301 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:21:16,303 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:21:16,307 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:21:16,308 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 33 [2020-10-27 00:21:16,308 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:21:16,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:21:16,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:21:16,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:21:16,311 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 00:21:16,335 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:21:16,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:21:16,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:21:16,606 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:21:16,615 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-27 00:21:16,616 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:21:16,616 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 216 [2020-10-27 00:21:16,617 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:21:16,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:21:16,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:21:16,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-27 00:21:16,617 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:21:16,797 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 00:21:16,798 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [448081846] [2020-10-27 00:21:16,798 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 00:21:16,798 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 00:21:16,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350879193] [2020-10-27 00:21:16,802 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 00:21:16,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:21:16,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 00:21:16,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-27 00:21:16,812 INFO L87 Difference]: Start difference. First operand 1003 states and 1543 transitions. Second operand 7 states. [2020-10-27 00:21:33,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:21:33,280 INFO L93 Difference]: Finished difference Result 2931 states and 4531 transitions. [2020-10-27 00:21:33,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 00:21:33,281 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 123 [2020-10-27 00:21:33,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:21:33,295 INFO L225 Difference]: With dead ends: 2931 [2020-10-27 00:21:33,295 INFO L226 Difference]: Without dead ends: 1934 [2020-10-27 00:21:33,300 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-27 00:21:33,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1934 states. [2020-10-27 00:21:33,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1934 to 1902. [2020-10-27 00:21:33,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1902 states. [2020-10-27 00:21:33,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1902 states to 1902 states and 2466 transitions. [2020-10-27 00:21:33,413 INFO L78 Accepts]: Start accepts. Automaton has 1902 states and 2466 transitions. Word has length 123 [2020-10-27 00:21:33,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:21:33,416 INFO L481 AbstractCegarLoop]: Abstraction has 1902 states and 2466 transitions. [2020-10-27 00:21:33,416 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 00:21:33,416 INFO L276 IsEmpty]: Start isEmpty. Operand 1902 states and 2466 transitions. [2020-10-27 00:21:33,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-10-27 00:21:33,429 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:21:33,430 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:21:33,430 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 00:21:33,430 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:21:33,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:21:33,434 INFO L82 PathProgramCache]: Analyzing trace with hash -857425441, now seen corresponding path program 1 times [2020-10-27 00:21:33,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:21:33,436 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [122818946] [2020-10-27 00:21:33,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:21:33,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:21:33,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:21:33,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:21:34,809 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:21:34,809 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 138 [2020-10-27 00:21:34,810 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 00:21:34,810 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1302 [2020-10-27 00:21:34,810 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:21:34,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 00:21:34,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:21:34,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 113 [2020-10-27 00:21:34,811 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 00:21:35,034 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:21:35,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:21:35,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:21:35,069 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:21:35,069 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:21:35,069 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:21:35,070 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-10-27 00:21:35,070 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:21:35,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:21:35,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:21:35,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:21:35,071 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:21:35,111 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:21:35,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:21:35,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:21:35,371 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:21:35,371 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-27 00:21:35,372 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:21:35,372 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 229 [2020-10-27 00:21:35,372 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:21:35,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 00:21:35,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:21:35,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-27 00:21:35,373 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:21:35,733 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 16 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 00:21:35,734 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [122818946] [2020-10-27 00:21:35,734 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:21:35,734 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 00:21:35,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562248400] [2020-10-27 00:21:35,735 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 00:21:35,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:21:35,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 00:21:35,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-10-27 00:21:35,737 INFO L87 Difference]: Start difference. First operand 1902 states and 2466 transitions. Second operand 8 states. [2020-10-27 00:21:36,511 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2020-10-27 00:21:37,235 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 67 [2020-10-27 00:21:52,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:21:52,431 INFO L93 Difference]: Finished difference Result 4323 states and 5480 transitions. [2020-10-27 00:21:52,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 00:21:52,433 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 126 [2020-10-27 00:21:52,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:21:52,453 INFO L225 Difference]: With dead ends: 4323 [2020-10-27 00:21:52,453 INFO L226 Difference]: Without dead ends: 2396 [2020-10-27 00:21:52,461 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2020-10-27 00:21:52,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2396 states. [2020-10-27 00:21:52,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2396 to 2338. [2020-10-27 00:21:52,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2338 states. [2020-10-27 00:21:52,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2338 states to 2338 states and 2914 transitions. [2020-10-27 00:21:52,598 INFO L78 Accepts]: Start accepts. Automaton has 2338 states and 2914 transitions. Word has length 126 [2020-10-27 00:21:52,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:21:52,601 INFO L481 AbstractCegarLoop]: Abstraction has 2338 states and 2914 transitions. [2020-10-27 00:21:52,601 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 00:21:52,602 INFO L276 IsEmpty]: Start isEmpty. Operand 2338 states and 2914 transitions. [2020-10-27 00:21:52,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2020-10-27 00:21:52,605 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:21:52,606 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:21:52,606 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 00:21:52,606 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:21:52,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:21:52,614 INFO L82 PathProgramCache]: Analyzing trace with hash -1215867022, now seen corresponding path program 1 times [2020-10-27 00:21:52,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:21:52,615 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2059751058] [2020-10-27 00:21:52,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:21:52,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:21:52,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:21:53,087 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:21:53,088 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 151 [2020-10-27 00:21:53,088 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:21:53,088 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 417 [2020-10-27 00:21:53,088 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:21:53,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:21:53,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 97 [2020-10-27 00:21:53,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-27 00:21:53,091 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 00:21:53,246 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:21:53,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:21:53,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:21:53,262 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:21:53,262 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:21:53,263 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:21:53,263 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-27 00:21:53,263 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:21:53,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 00:21:53,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:21:53,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 00:21:53,264 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:21:53,289 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:21:53,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:21:53,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:21:53,429 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:21:53,430 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 00:21:53,430 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:21:53,430 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 115 [2020-10-27 00:21:53,430 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:21:53,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:21:53,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:21:53,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-27 00:21:53,431 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:21:53,507 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 43 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 00:21:53,508 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2059751058] [2020-10-27 00:21:53,508 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:21:53,508 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 00:21:53,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863976562] [2020-10-27 00:21:53,509 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 00:21:53,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:21:53,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 00:21:53,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 00:21:53,523 INFO L87 Difference]: Start difference. First operand 2338 states and 2914 transitions. Second operand 6 states. [2020-10-27 00:22:07,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:22:07,354 INFO L93 Difference]: Finished difference Result 4685 states and 6209 transitions. [2020-10-27 00:22:07,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 00:22:07,356 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 139 [2020-10-27 00:22:07,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:22:07,371 INFO L225 Difference]: With dead ends: 4685 [2020-10-27 00:22:07,371 INFO L226 Difference]: Without dead ends: 2786 [2020-10-27 00:22:07,377 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-27 00:22:07,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2786 states. [2020-10-27 00:22:07,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2786 to 2776. [2020-10-27 00:22:07,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2776 states. [2020-10-27 00:22:07,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2776 states to 2776 states and 3708 transitions. [2020-10-27 00:22:07,469 INFO L78 Accepts]: Start accepts. Automaton has 2776 states and 3708 transitions. Word has length 139 [2020-10-27 00:22:07,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:22:07,470 INFO L481 AbstractCegarLoop]: Abstraction has 2776 states and 3708 transitions. [2020-10-27 00:22:07,470 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 00:22:07,470 INFO L276 IsEmpty]: Start isEmpty. Operand 2776 states and 3708 transitions. [2020-10-27 00:22:07,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2020-10-27 00:22:07,474 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:22:07,474 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:22:07,474 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 00:22:07,475 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:22:07,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:22:07,476 INFO L82 PathProgramCache]: Analyzing trace with hash -1334589166, now seen corresponding path program 1 times [2020-10-27 00:22:07,476 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:22:07,476 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1398488903] [2020-10-27 00:22:07,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:22:07,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:22:07,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:22:07,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:22:08,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:22:10,208 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:22:10,209 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 224 [2020-10-27 00:22:10,209 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 00:22:10,209 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2670 [2020-10-27 00:22:10,209 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:22:10,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 00:22:10,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:22:10,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 215 [2020-10-27 00:22:10,210 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:22:10,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:22:10,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:22:10,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:22:10,461 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:22:10,461 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:22:10,462 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:22:10,462 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-27 00:22:10,462 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:22:10,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:22:10,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:22:10,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:22:10,463 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:22:10,499 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:22:10,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:22:10,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:22:10,799 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:22:10,799 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 00:22:10,800 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:22:10,800 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 268 [2020-10-27 00:22:10,800 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:22:10,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 00:22:10,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:22:10,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 88 [2020-10-27 00:22:10,801 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:22:10,880 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-27 00:22:10,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:22:10,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:22:11,051 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:22:11,052 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-27 00:22:11,052 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:22:11,052 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 141 [2020-10-27 00:22:11,052 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:22:11,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:22:11,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:22:11,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-27 00:22:11,053 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:22:11,208 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 6 proven. 84 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2020-10-27 00:22:11,208 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1398488903] [2020-10-27 00:22:11,209 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:22:11,209 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 00:22:11,210 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38200389] [2020-10-27 00:22:11,210 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 00:22:11,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:22:11,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 00:22:11,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-27 00:22:11,212 INFO L87 Difference]: Start difference. First operand 2776 states and 3708 transitions. Second operand 8 states. [2020-10-27 00:22:43,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:22:43,265 INFO L93 Difference]: Finished difference Result 8346 states and 11396 transitions. [2020-10-27 00:22:43,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 00:22:43,272 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 210 [2020-10-27 00:22:43,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:22:43,301 INFO L225 Difference]: With dead ends: 8346 [2020-10-27 00:22:43,301 INFO L226 Difference]: Without dead ends: 5554 [2020-10-27 00:22:43,310 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2020-10-27 00:22:43,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5554 states. [2020-10-27 00:22:43,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5554 to 5521. [2020-10-27 00:22:43,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5521 states. [2020-10-27 00:22:43,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5521 states to 5521 states and 7142 transitions. [2020-10-27 00:22:43,472 INFO L78 Accepts]: Start accepts. Automaton has 5521 states and 7142 transitions. Word has length 210 [2020-10-27 00:22:43,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:22:43,473 INFO L481 AbstractCegarLoop]: Abstraction has 5521 states and 7142 transitions. [2020-10-27 00:22:43,473 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 00:22:43,473 INFO L276 IsEmpty]: Start isEmpty. Operand 5521 states and 7142 transitions. [2020-10-27 00:22:43,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2020-10-27 00:22:43,477 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:22:43,477 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:22:43,478 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 00:22:43,478 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:22:43,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:22:43,478 INFO L82 PathProgramCache]: Analyzing trace with hash 931284198, now seen corresponding path program 1 times [2020-10-27 00:22:43,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:22:43,479 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1784385794] [2020-10-27 00:22:43,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:22:43,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:22:43,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:22:43,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:22:44,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:22:45,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:22:45,959 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:22:45,960 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 230 [2020-10-27 00:22:45,960 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 00:22:45,960 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2423 [2020-10-27 00:22:45,960 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:22:45,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 00:22:45,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:22:45,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 221 [2020-10-27 00:22:45,961 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:22:46,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:22:46,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:22:46,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:22:46,165 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:22:46,166 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:22:46,166 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:22:46,166 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-27 00:22:46,166 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:22:46,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:22:46,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:22:46,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:22:46,167 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:22:46,199 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:22:46,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:22:46,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:22:46,415 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:22:46,415 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 00:22:46,416 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:22:46,416 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 192 [2020-10-27 00:22:46,416 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:22:46,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 00:22:46,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:22:46,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 88 [2020-10-27 00:22:46,417 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 00:22:46,497 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-27 00:22:46,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:22:46,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:22:46,673 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:22:46,673 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-27 00:22:46,674 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:22:46,674 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 154 [2020-10-27 00:22:46,674 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:22:46,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:22:46,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:22:46,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-27 00:22:46,675 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:22:46,786 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2020-10-27 00:22:46,786 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1784385794] [2020-10-27 00:22:46,788 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:22:46,788 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 00:22:46,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658656995] [2020-10-27 00:22:46,789 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 00:22:46,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:22:46,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 00:22:46,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-27 00:22:46,793 INFO L87 Difference]: Start difference. First operand 5521 states and 7142 transitions. Second operand 8 states. [2020-10-27 00:22:47,732 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 68 [2020-10-27 00:23:10,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:23:10,741 INFO L93 Difference]: Finished difference Result 12575 states and 16438 transitions. [2020-10-27 00:23:10,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 00:23:10,743 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 216 [2020-10-27 00:23:10,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:23:10,776 INFO L225 Difference]: With dead ends: 12575 [2020-10-27 00:23:10,776 INFO L226 Difference]: Without dead ends: 6606 [2020-10-27 00:23:10,790 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2020-10-27 00:23:10,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6606 states. [2020-10-27 00:23:10,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6606 to 6549. [2020-10-27 00:23:10,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6549 states. [2020-10-27 00:23:10,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6549 states to 6549 states and 8421 transitions. [2020-10-27 00:23:10,984 INFO L78 Accepts]: Start accepts. Automaton has 6549 states and 8421 transitions. Word has length 216 [2020-10-27 00:23:10,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:23:10,985 INFO L481 AbstractCegarLoop]: Abstraction has 6549 states and 8421 transitions. [2020-10-27 00:23:10,985 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 00:23:10,985 INFO L276 IsEmpty]: Start isEmpty. Operand 6549 states and 8421 transitions. [2020-10-27 00:23:10,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2020-10-27 00:23:10,990 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:23:10,990 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:23:10,990 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 00:23:10,991 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:23:10,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:23:10,991 INFO L82 PathProgramCache]: Analyzing trace with hash -1045454976, now seen corresponding path program 1 times [2020-10-27 00:23:10,991 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:23:10,992 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1649943010] [2020-10-27 00:23:10,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:23:11,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:23:11,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:23:11,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:23:12,278 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:23:12,278 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 239 [2020-10-27 00:23:12,278 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 00:23:12,279 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1221 [2020-10-27 00:23:12,279 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:23:12,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 00:23:12,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 97 [2020-10-27 00:23:12,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 138 [2020-10-27 00:23:12,280 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:23:12,437 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:23:12,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:23:12,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:23:12,445 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:23:12,446 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:23:12,446 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:23:12,446 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 00:23:12,446 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:23:12,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 00:23:12,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:23:12,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 00:23:12,448 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 00:23:12,476 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:23:12,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:23:12,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:23:12,599 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:23:12,599 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 00:23:12,599 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:23:12,599 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 100 [2020-10-27 00:23:12,600 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:23:12,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:23:12,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:23:12,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-27 00:23:12,600 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:23:12,628 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-27 00:23:12,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:23:12,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:23:12,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:23:12,834 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:23:12,834 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-27 00:23:12,834 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 00:23:12,835 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 180 [2020-10-27 00:23:12,835 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:23:12,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:23:12,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:23:12,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 87 [2020-10-27 00:23:12,836 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:23:12,973 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 125 proven. 44 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-27 00:23:12,973 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1649943010] [2020-10-27 00:23:12,973 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:23:12,974 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 00:23:12,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154956155] [2020-10-27 00:23:12,974 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 00:23:12,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:23:12,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 00:23:12,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-27 00:23:12,976 INFO L87 Difference]: Start difference. First operand 6549 states and 8421 transitions. Second operand 6 states. [2020-10-27 00:23:29,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:23:29,306 INFO L93 Difference]: Finished difference Result 13242 states and 17684 transitions. [2020-10-27 00:23:29,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 00:23:29,309 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 225 [2020-10-27 00:23:29,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:23:29,358 INFO L225 Difference]: With dead ends: 13242 [2020-10-27 00:23:29,359 INFO L226 Difference]: Without dead ends: 7134 [2020-10-27 00:23:29,373 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-27 00:23:29,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7134 states. [2020-10-27 00:23:29,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7134 to 7005. [2020-10-27 00:23:29,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7005 states. [2020-10-27 00:23:29,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7005 states to 7005 states and 9288 transitions. [2020-10-27 00:23:29,585 INFO L78 Accepts]: Start accepts. Automaton has 7005 states and 9288 transitions. Word has length 225 [2020-10-27 00:23:29,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:23:29,586 INFO L481 AbstractCegarLoop]: Abstraction has 7005 states and 9288 transitions. [2020-10-27 00:23:29,586 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 00:23:29,586 INFO L276 IsEmpty]: Start isEmpty. Operand 7005 states and 9288 transitions. [2020-10-27 00:23:29,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 297 [2020-10-27 00:23:29,592 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:23:29,592 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:23:29,592 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 00:23:29,593 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:23:29,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:23:29,593 INFO L82 PathProgramCache]: Analyzing trace with hash -868195004, now seen corresponding path program 1 times [2020-10-27 00:23:29,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:23:29,594 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2035188597] [2020-10-27 00:23:29,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:23:29,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:23:29,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:23:29,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:23:30,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:23:31,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:23:34,237 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:23:34,238 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 312 [2020-10-27 00:23:34,238 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 00:23:34,238 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4530 [2020-10-27 00:23:34,238 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:23:34,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 00:23:34,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:23:34,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 303 [2020-10-27 00:23:34,239 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:23:34,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:23:34,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:23:34,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:23:34,454 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:23:34,454 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:23:34,456 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:23:34,456 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-27 00:23:34,456 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:23:34,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:23:34,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:23:34,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:23:34,457 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:23:34,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:23:34,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:23:34,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:23:34,777 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:23:34,777 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 00:23:34,778 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:23:34,778 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 249 [2020-10-27 00:23:34,778 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:23:34,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 00:23:34,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:23:34,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 88 [2020-10-27 00:23:34,779 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:23:34,852 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-27 00:23:34,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:23:34,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:23:35,006 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:23:35,006 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-27 00:23:35,007 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:23:35,007 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 134 [2020-10-27 00:23:35,007 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:23:35,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:23:35,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:23:35,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 87 [2020-10-27 00:23:35,008 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:23:35,047 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2020-10-27 00:23:35,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:23:35,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:23:35,161 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:23:35,161 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-27 00:23:35,161 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:23:35,161 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 98 [2020-10-27 00:23:35,161 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:23:35,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:23:35,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:23:35,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-27 00:23:35,162 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:23:35,401 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 139 proven. 127 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2020-10-27 00:23:35,401 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2035188597] [2020-10-27 00:23:35,402 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:23:35,402 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 00:23:35,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112790887] [2020-10-27 00:23:35,403 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 00:23:35,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:23:35,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 00:23:35,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-10-27 00:23:35,405 INFO L87 Difference]: Start difference. First operand 7005 states and 9288 transitions. Second operand 9 states. [2020-10-27 00:23:35,576 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-27 00:23:36,484 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-10-27 00:24:06,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:24:06,775 INFO L93 Difference]: Finished difference Result 22699 states and 31514 transitions. [2020-10-27 00:24:06,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 00:24:06,777 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 296 [2020-10-27 00:24:06,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:24:06,843 INFO L225 Difference]: With dead ends: 22699 [2020-10-27 00:24:06,843 INFO L226 Difference]: Without dead ends: 15229 [2020-10-27 00:24:06,870 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2020-10-27 00:24:06,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15229 states. [2020-10-27 00:24:07,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15229 to 12835. [2020-10-27 00:24:07,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12835 states. [2020-10-27 00:24:07,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12835 states to 12835 states and 16671 transitions. [2020-10-27 00:24:07,238 INFO L78 Accepts]: Start accepts. Automaton has 12835 states and 16671 transitions. Word has length 296 [2020-10-27 00:24:07,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:24:07,239 INFO L481 AbstractCegarLoop]: Abstraction has 12835 states and 16671 transitions. [2020-10-27 00:24:07,239 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 00:24:07,239 INFO L276 IsEmpty]: Start isEmpty. Operand 12835 states and 16671 transitions. [2020-10-27 00:24:07,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 303 [2020-10-27 00:24:07,246 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:24:07,246 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:24:07,246 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 00:24:07,247 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:24:07,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:24:07,247 INFO L82 PathProgramCache]: Analyzing trace with hash -345934952, now seen corresponding path program 1 times [2020-10-27 00:24:07,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:24:07,248 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [621923236] [2020-10-27 00:24:07,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:24:07,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:24:07,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:24:07,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:24:08,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:24:09,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:24:11,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:24:11,475 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:24:11,475 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 318 [2020-10-27 00:24:11,475 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 00:24:11,475 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4149 [2020-10-27 00:24:11,475 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:24:11,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 00:24:11,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 97 [2020-10-27 00:24:11,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 168 [2020-10-27 00:24:11,476 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:24:11,637 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:24:11,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:24:11,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:24:11,647 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:24:11,647 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:24:11,647 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:24:11,647 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 00:24:11,648 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:24:11,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 00:24:11,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:24:11,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 00:24:11,648 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:24:11,696 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:24:11,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:24:11,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:24:11,806 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:24:11,807 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 00:24:11,807 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:24:11,808 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 85 [2020-10-27 00:24:11,808 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:24:11,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:24:11,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:24:11,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-27 00:24:11,809 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:24:11,841 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-27 00:24:11,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:24:11,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:24:11,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:24:12,089 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:24:12,090 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-27 00:24:12,090 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 00:24:12,090 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 227 [2020-10-27 00:24:12,090 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:24:12,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:24:12,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:24:12,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 87 [2020-10-27 00:24:12,091 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:24:12,145 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2020-10-27 00:24:12,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:24:12,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:24:12,280 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:24:12,280 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-27 00:24:12,280 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:24:12,281 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 117 [2020-10-27 00:24:12,281 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:24:12,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:24:12,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:24:12,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-27 00:24:12,281 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:24:12,538 INFO L134 CoverageAnalysis]: Checked inductivity of 372 backedges. 289 proven. 76 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-27 00:24:12,538 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [621923236] [2020-10-27 00:24:12,540 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:24:12,540 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 00:24:12,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883213760] [2020-10-27 00:24:12,541 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 00:24:12,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:24:12,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 00:24:12,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-10-27 00:24:12,543 INFO L87 Difference]: Start difference. First operand 12835 states and 16671 transitions. Second operand 8 states. [2020-10-27 00:24:19,282 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2020-10-27 00:24:38,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:24:38,534 INFO L93 Difference]: Finished difference Result 32948 states and 43963 transitions. [2020-10-27 00:24:38,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 00:24:38,538 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 302 [2020-10-27 00:24:38,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:24:38,627 INFO L225 Difference]: With dead ends: 32948 [2020-10-27 00:24:38,627 INFO L226 Difference]: Without dead ends: 20554 [2020-10-27 00:24:38,670 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-27 00:24:38,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20554 states. [2020-10-27 00:24:39,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20554 to 19597. [2020-10-27 00:24:39,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19597 states. [2020-10-27 00:24:39,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19597 states to 19597 states and 24461 transitions. [2020-10-27 00:24:39,180 INFO L78 Accepts]: Start accepts. Automaton has 19597 states and 24461 transitions. Word has length 302 [2020-10-27 00:24:39,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:24:39,181 INFO L481 AbstractCegarLoop]: Abstraction has 19597 states and 24461 transitions. [2020-10-27 00:24:39,181 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 00:24:39,181 INFO L276 IsEmpty]: Start isEmpty. Operand 19597 states and 24461 transitions. [2020-10-27 00:24:39,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 318 [2020-10-27 00:24:39,188 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:24:39,188 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:24:39,188 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 00:24:39,189 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:24:39,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:24:39,189 INFO L82 PathProgramCache]: Analyzing trace with hash -432721055, now seen corresponding path program 1 times [2020-10-27 00:24:39,190 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:24:39,190 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1294413908] [2020-10-27 00:24:39,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:24:39,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:24:39,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:24:39,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:24:39,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking...