/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=DEEPEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/loop-lit/gr2006.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 20:19:50,206 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 20:19:50,209 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 20:19:50,253 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 20:19:50,254 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 20:19:50,256 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 20:19:50,257 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 20:19:50,260 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 20:19:50,263 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 20:19:50,264 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 20:19:50,265 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 20:19:50,267 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 20:19:50,268 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 20:19:50,269 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 20:19:50,271 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 20:19:50,272 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 20:19:50,273 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 20:19:50,275 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 20:19:50,277 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 20:19:50,282 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 20:19:50,294 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 20:19:50,299 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 20:19:50,302 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 20:19:50,304 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 20:19:50,317 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 20:19:50,317 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 20:19:50,318 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 20:19:50,319 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 20:19:50,323 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 20:19:50,326 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 20:19:50,327 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 20:19:50,328 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 20:19:50,332 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 20:19:50,333 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 20:19:50,335 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 20:19:50,336 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 20:19:50,337 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 20:19:50,337 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 20:19:50,338 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 20:19:50,339 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 20:19:50,340 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 20:19:50,341 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-27 20:19:50,400 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 20:19:50,400 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 20:19:50,405 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 20:19:50,405 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 20:19:50,405 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 20:19:50,406 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 20:19:50,406 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 20:19:50,406 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 20:19:50,407 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 20:19:50,407 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 20:19:50,408 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 20:19:50,409 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 20:19:50,409 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 20:19:50,409 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 20:19:50,409 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 20:19:50,409 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 20:19:50,410 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 20:19:50,410 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 20:19:50,410 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 20:19:50,411 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 20:19:50,411 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 20:19:50,411 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 20:19:50,411 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 20:19:50,412 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 20:19:50,412 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 20:19:50,413 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 20:19:50,413 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 20:19:50,413 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 20:19:50,413 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 20:19:50,413 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 20:19:50,901 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 20:19:50,937 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 20:19:50,940 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 20:19:50,942 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 20:19:50,943 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 20:19:50,944 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/gr2006.i [2020-10-27 20:19:51,041 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/17f57e2b6/3f34643358ac49ba968dfb594d5795b5/FLAGfc3da3f12 [2020-10-27 20:19:51,677 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 20:19:51,678 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-lit/gr2006.i [2020-10-27 20:19:51,686 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/17f57e2b6/3f34643358ac49ba968dfb594d5795b5/FLAGfc3da3f12 [2020-10-27 20:19:52,037 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/17f57e2b6/3f34643358ac49ba968dfb594d5795b5 [2020-10-27 20:19:52,044 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 20:19:52,051 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 20:19:52,052 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 20:19:52,053 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 20:19:52,059 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 20:19:52,060 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 08:19:52" (1/1) ... [2020-10-27 20:19:52,065 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@c1f9ed8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:19:52, skipping insertion in model container [2020-10-27 20:19:52,065 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 08:19:52" (1/1) ... [2020-10-27 20:19:52,074 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 20:19:52,092 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 20:19:52,256 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 20:19:52,267 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 20:19:52,285 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 20:19:52,303 INFO L208 MainTranslator]: Completed translation [2020-10-27 20:19:52,304 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:19:52 WrapperNode [2020-10-27 20:19:52,304 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 20:19:52,306 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 20:19:52,306 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 20:19:52,306 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 20:19:52,320 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:19:52" (1/1) ... [2020-10-27 20:19:52,320 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:19:52" (1/1) ... [2020-10-27 20:19:52,328 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:19:52" (1/1) ... [2020-10-27 20:19:52,329 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:19:52" (1/1) ... [2020-10-27 20:19:52,335 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:19:52" (1/1) ... [2020-10-27 20:19:52,340 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:19:52" (1/1) ... [2020-10-27 20:19:52,341 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:19:52" (1/1) ... [2020-10-27 20:19:52,344 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 20:19:52,345 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 20:19:52,345 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 20:19:52,345 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 20:19:52,346 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:19:52" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 20:19:52,427 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 20:19:52,427 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 20:19:52,427 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 20:19:52,427 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-27 20:19:52,428 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-27 20:19:52,428 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 20:19:52,428 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 20:19:52,428 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 20:19:52,428 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-27 20:19:52,428 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-27 20:19:52,429 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 20:19:52,429 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 20:19:52,429 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-27 20:19:52,429 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-27 20:19:52,429 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 20:19:52,429 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 20:19:52,430 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 20:19:52,430 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 20:19:52,430 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 20:19:52,430 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 20:19:52,430 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 20:19:52,430 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 20:19:52,948 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 20:19:52,948 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-27 20:19:52,950 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 08:19:52 BoogieIcfgContainer [2020-10-27 20:19:52,950 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 20:19:52,954 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 20:19:52,955 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 20:19:52,959 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 20:19:52,959 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 08:19:52" (1/3) ... [2020-10-27 20:19:52,960 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40db4169 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 08:19:52, skipping insertion in model container [2020-10-27 20:19:52,961 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:19:52" (2/3) ... [2020-10-27 20:19:52,962 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40db4169 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 08:19:52, skipping insertion in model container [2020-10-27 20:19:52,962 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 08:19:52" (3/3) ... [2020-10-27 20:19:52,965 INFO L111 eAbstractionObserver]: Analyzing ICFG gr2006.i [2020-10-27 20:19:52,978 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 20:19:52,983 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 20:19:53,001 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 20:19:53,051 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 20:19:53,077 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 20:19:53,078 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 20:19:53,079 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 20:19:53,079 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 20:19:53,079 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 20:19:53,079 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 20:19:53,079 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 20:19:53,111 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states. [2020-10-27 20:19:53,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-27 20:19:53,136 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:19:53,137 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:19:53,138 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:19:53,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:19:53,149 INFO L82 PathProgramCache]: Analyzing trace with hash -1313296839, now seen corresponding path program 1 times [2020-10-27 20:19:53,160 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:19:53,161 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1198073643] [2020-10-27 20:19:53,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:19:53,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:19:53,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:19:53,433 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:19:53,434 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-27 20:19:53,434 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:19:53,434 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 98 [2020-10-27 20:19:53,436 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:19:53,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:19:53,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 20:19:53,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:19:53,437 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 20:19:53,556 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:19:53,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:19:53,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:19:53,581 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:19:53,582 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:19:53,582 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:19:53,582 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-27 20:19:53,583 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:19:53,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:19:53,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:19:53,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:19:53,583 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:19:53,597 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:19:53,598 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1198073643] [2020-10-27 20:19:53,600 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:19:53,601 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-27 20:19:53,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067032332] [2020-10-27 20:19:53,607 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-27 20:19:53,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:19:53,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-27 20:19:53,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-27 20:19:53,625 INFO L87 Difference]: Start difference. First operand 26 states. Second operand 3 states. [2020-10-27 20:19:53,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:19:53,703 INFO L93 Difference]: Finished difference Result 40 states and 48 transitions. [2020-10-27 20:19:53,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-27 20:19:53,706 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2020-10-27 20:19:53,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:19:53,714 INFO L225 Difference]: With dead ends: 40 [2020-10-27 20:19:53,714 INFO L226 Difference]: Without dead ends: 16 [2020-10-27 20:19:53,718 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-27 20:19:53,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-10-27 20:19:53,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-10-27 20:19:53,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-10-27 20:19:53,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2020-10-27 20:19:53,763 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 13 [2020-10-27 20:19:53,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:19:53,763 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2020-10-27 20:19:53,763 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-27 20:19:53,763 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2020-10-27 20:19:53,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-27 20:19:53,764 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:19:53,764 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:19:53,765 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 20:19:53,765 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:19:53,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:19:53,766 INFO L82 PathProgramCache]: Analyzing trace with hash 851353874, now seen corresponding path program 1 times [2020-10-27 20:19:53,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:19:53,767 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1116854148] [2020-10-27 20:19:53,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:19:53,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:19:53,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:19:54,000 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:19:54,000 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-27 20:19:54,000 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:19:54,000 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 215 [2020-10-27 20:19:54,001 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:19:54,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 20:19:54,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:19:54,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-27 20:19:54,001 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:19:54,091 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:19:54,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:19:54,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:19:54,104 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:19:54,105 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:19:54,105 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:19:54,105 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 20:19:54,105 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:19:54,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:19:54,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:19:54,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:19:54,106 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:19:54,113 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:19:54,114 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1116854148] [2020-10-27 20:19:54,114 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:19:54,114 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 20:19:54,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324413215] [2020-10-27 20:19:54,116 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 20:19:54,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:19:54,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 20:19:54,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 20:19:54,118 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand 5 states. [2020-10-27 20:19:54,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:19:54,307 INFO L93 Difference]: Finished difference Result 27 states and 30 transitions. [2020-10-27 20:19:54,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 20:19:54,308 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-10-27 20:19:54,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:19:54,309 INFO L225 Difference]: With dead ends: 27 [2020-10-27 20:19:54,309 INFO L226 Difference]: Without dead ends: 20 [2020-10-27 20:19:54,310 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-27 20:19:54,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-10-27 20:19:54,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-10-27 20:19:54,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-27 20:19:54,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2020-10-27 20:19:54,323 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 15 [2020-10-27 20:19:54,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:19:54,324 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2020-10-27 20:19:54,324 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 20:19:54,324 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2020-10-27 20:19:54,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-27 20:19:54,325 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:19:54,325 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:19:54,325 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 20:19:54,325 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:19:54,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:19:54,326 INFO L82 PathProgramCache]: Analyzing trace with hash 42007248, now seen corresponding path program 1 times [2020-10-27 20:19:54,327 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:19:54,327 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1032909070] [2020-10-27 20:19:54,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:19:54,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:19:54,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:19:54,384 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:19:54,384 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-27 20:19:54,384 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:19:54,385 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 45 [2020-10-27 20:19:54,385 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:19:54,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 20:19:54,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:19:54,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-27 20:19:54,386 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:19:54,437 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:19:54,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:19:54,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:19:54,450 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:19:54,450 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:19:54,450 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:19:54,450 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 20:19:54,451 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:19:54,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:19:54,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:19:54,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:19:54,452 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:19:54,457 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:19:54,458 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1032909070] [2020-10-27 20:19:54,458 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:19:54,458 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 20:19:54,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879854618] [2020-10-27 20:19:54,459 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 20:19:54,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:19:54,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 20:19:54,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 20:19:54,461 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 4 states. [2020-10-27 20:19:54,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:19:54,562 INFO L93 Difference]: Finished difference Result 37 states and 42 transitions. [2020-10-27 20:19:54,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 20:19:54,563 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2020-10-27 20:19:54,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:19:54,564 INFO L225 Difference]: With dead ends: 37 [2020-10-27 20:19:54,564 INFO L226 Difference]: Without dead ends: 23 [2020-10-27 20:19:54,565 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 20:19:54,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-10-27 20:19:54,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2020-10-27 20:19:54,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-27 20:19:54,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2020-10-27 20:19:54,574 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 15 [2020-10-27 20:19:54,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:19:54,574 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2020-10-27 20:19:54,574 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 20:19:54,575 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2020-10-27 20:19:54,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-27 20:19:54,576 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:19:54,576 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:19:54,576 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 20:19:54,576 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:19:54,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:19:54,577 INFO L82 PathProgramCache]: Analyzing trace with hash -1527438062, now seen corresponding path program 1 times [2020-10-27 20:19:54,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:19:54,578 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [798434679] [2020-10-27 20:19:54,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:19:54,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:19:54,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:19:54,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:19:54,791 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:19:54,792 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-27 20:19:54,792 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:19:54,792 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 199 [2020-10-27 20:19:54,793 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:19:54,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 20:19:54,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:19:54,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 20:19:54,794 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 20:19:54,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:19:54,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:19:54,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:19:54,866 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:19:54,866 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:19:54,866 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:19:54,866 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 20:19:54,867 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:19:54,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:19:54,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:19:54,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:19:54,868 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:19:54,873 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 20:19:54,873 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [798434679] [2020-10-27 20:19:54,873 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:19:54,874 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 20:19:54,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028210781] [2020-10-27 20:19:54,874 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 20:19:54,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:19:54,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 20:19:54,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 20:19:54,876 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand 5 states. [2020-10-27 20:19:55,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:19:55,037 INFO L93 Difference]: Finished difference Result 40 states and 45 transitions. [2020-10-27 20:19:55,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 20:19:55,038 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2020-10-27 20:19:55,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:19:55,039 INFO L225 Difference]: With dead ends: 40 [2020-10-27 20:19:55,039 INFO L226 Difference]: Without dead ends: 26 [2020-10-27 20:19:55,040 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-27 20:19:55,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-10-27 20:19:55,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2020-10-27 20:19:55,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-27 20:19:55,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2020-10-27 20:19:55,047 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 21 [2020-10-27 20:19:55,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:19:55,047 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2020-10-27 20:19:55,047 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 20:19:55,048 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2020-10-27 20:19:55,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-27 20:19:55,048 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:19:55,049 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:19:55,049 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 20:19:55,049 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:19:55,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:19:55,050 INFO L82 PathProgramCache]: Analyzing trace with hash -424032460, now seen corresponding path program 2 times [2020-10-27 20:19:55,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:19:55,050 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [897881832] [2020-10-27 20:19:55,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:19:55,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:19:55,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:19:55,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:19:55,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:19:55,350 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:19:55,350 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-27 20:19:55,350 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:19:55,351 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 287 [2020-10-27 20:19:55,351 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:19:55,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 20:19:55,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:19:55,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-27 20:19:55,352 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:19:55,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:19:55,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:19:55,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:19:55,433 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:19:55,434 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:19:55,434 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:19:55,434 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:19:55,434 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:19:55,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:19:55,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:19:55,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:19:55,435 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:19:55,441 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-27 20:19:55,442 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [897881832] [2020-10-27 20:19:55,442 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:19:55,442 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 20:19:55,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752270583] [2020-10-27 20:19:55,443 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 20:19:55,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:19:55,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 20:19:55,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-27 20:19:55,444 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 6 states. [2020-10-27 20:19:55,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:19:55,661 INFO L93 Difference]: Finished difference Result 39 states and 43 transitions. [2020-10-27 20:19:55,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 20:19:55,662 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 24 [2020-10-27 20:19:55,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:19:55,664 INFO L225 Difference]: With dead ends: 39 [2020-10-27 20:19:55,664 INFO L226 Difference]: Without dead ends: 32 [2020-10-27 20:19:55,665 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-27 20:19:55,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-27 20:19:55,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 28. [2020-10-27 20:19:55,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-27 20:19:55,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2020-10-27 20:19:55,673 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 24 [2020-10-27 20:19:55,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:19:55,673 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2020-10-27 20:19:55,674 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 20:19:55,674 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2020-10-27 20:19:55,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-27 20:19:55,675 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:19:55,675 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:19:55,675 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 20:19:55,675 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:19:55,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:19:55,676 INFO L82 PathProgramCache]: Analyzing trace with hash 736423184, now seen corresponding path program 3 times [2020-10-27 20:19:55,676 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:19:55,676 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1928654581] [2020-10-27 20:19:55,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:19:55,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:19:55,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:19:55,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:19:55,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:19:55,906 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:19:55,906 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-27 20:19:55,907 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:19:55,907 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 219 [2020-10-27 20:19:55,907 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:19:55,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 20:19:55,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:19:55,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-27 20:19:55,908 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:19:56,030 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:19:56,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:19:56,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:19:56,037 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:19:56,038 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:19:56,038 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:19:56,038 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:19:56,038 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:19:56,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:19:56,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:19:56,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:19:56,039 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:19:56,043 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:19:56,044 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1928654581] [2020-10-27 20:19:56,044 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:19:56,044 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 20:19:56,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342149505] [2020-10-27 20:19:56,045 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 20:19:56,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:19:56,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 20:19:56,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-27 20:19:56,046 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand 8 states. [2020-10-27 20:19:56,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:19:56,373 INFO L93 Difference]: Finished difference Result 55 states and 64 transitions. [2020-10-27 20:19:56,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 20:19:56,374 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 27 [2020-10-27 20:19:56,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:19:56,375 INFO L225 Difference]: With dead ends: 55 [2020-10-27 20:19:56,375 INFO L226 Difference]: Without dead ends: 38 [2020-10-27 20:19:56,376 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2020-10-27 20:19:56,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-27 20:19:56,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2020-10-27 20:19:56,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-27 20:19:56,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 40 transitions. [2020-10-27 20:19:56,383 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 40 transitions. Word has length 27 [2020-10-27 20:19:56,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:19:56,384 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 40 transitions. [2020-10-27 20:19:56,384 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 20:19:56,384 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 40 transitions. [2020-10-27 20:19:56,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-27 20:19:56,385 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:19:56,385 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:19:56,385 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 20:19:56,386 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:19:56,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:19:56,386 INFO L82 PathProgramCache]: Analyzing trace with hash 2081886450, now seen corresponding path program 4 times [2020-10-27 20:19:56,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:19:56,387 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [963073653] [2020-10-27 20:19:56,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:19:56,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:19:56,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:19:56,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:19:56,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:19:56,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:19:56,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:19:56,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:19:57,677 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:19:57,677 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-27 20:19:57,678 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 20:19:57,678 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1279 [2020-10-27 20:19:57,678 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:19:57,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 20:19:57,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-27 20:19:57,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-27 20:19:57,679 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 20:19:57,791 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:19:57,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:19:57,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:19:57,798 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:19:57,799 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:19:57,799 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:19:57,799 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:19:57,799 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:19:57,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:19:57,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:19:57,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:19:57,800 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:19:57,807 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 58 proven. 17 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-27 20:19:57,807 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [963073653] [2020-10-27 20:19:57,808 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:19:57,808 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 20:19:57,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422888196] [2020-10-27 20:19:57,810 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 20:19:57,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:19:57,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 20:19:57,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-27 20:19:57,813 INFO L87 Difference]: Start difference. First operand 37 states and 40 transitions. Second operand 7 states. [2020-10-27 20:19:58,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:19:58,093 INFO L93 Difference]: Finished difference Result 54 states and 60 transitions. [2020-10-27 20:19:58,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 20:19:58,094 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 36 [2020-10-27 20:19:58,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:19:58,096 INFO L225 Difference]: With dead ends: 54 [2020-10-27 20:19:58,096 INFO L226 Difference]: Without dead ends: 47 [2020-10-27 20:19:58,097 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2020-10-27 20:19:58,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-27 20:19:58,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 40. [2020-10-27 20:19:58,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-27 20:19:58,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2020-10-27 20:19:58,111 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 36 [2020-10-27 20:19:58,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:19:58,111 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2020-10-27 20:19:58,111 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 20:19:58,111 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2020-10-27 20:19:58,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-27 20:19:58,115 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:19:58,115 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:19:58,115 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 20:19:58,116 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:19:58,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:19:58,118 INFO L82 PathProgramCache]: Analyzing trace with hash -554868078, now seen corresponding path program 5 times [2020-10-27 20:19:58,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:19:58,119 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [649667484] [2020-10-27 20:19:58,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:19:58,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:19:58,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:19:58,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:19:58,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:19:58,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:19:58,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:19:58,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:19:59,505 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:19:59,506 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-27 20:19:59,506 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 20:19:59,506 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1361 [2020-10-27 20:19:59,506 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:19:59,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 20:19:59,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 20:19:59,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-27 20:19:59,507 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:19:59,611 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:19:59,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:19:59,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:19:59,617 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:19:59,617 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:19:59,617 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:19:59,618 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:19:59,618 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:19:59,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:19:59,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:19:59,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:19:59,619 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:19:59,623 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 65 proven. 34 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-27 20:19:59,624 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [649667484] [2020-10-27 20:19:59,624 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:19:59,624 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 20:19:59,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306457989] [2020-10-27 20:19:59,625 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 20:19:59,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:19:59,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 20:19:59,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-27 20:19:59,626 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand 8 states. [2020-10-27 20:19:59,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:19:59,926 INFO L93 Difference]: Finished difference Result 60 states and 68 transitions. [2020-10-27 20:19:59,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 20:19:59,927 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 39 [2020-10-27 20:19:59,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:19:59,928 INFO L225 Difference]: With dead ends: 60 [2020-10-27 20:19:59,928 INFO L226 Difference]: Without dead ends: 53 [2020-10-27 20:19:59,929 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2020-10-27 20:19:59,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-27 20:19:59,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 43. [2020-10-27 20:19:59,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-27 20:19:59,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 48 transitions. [2020-10-27 20:19:59,937 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 48 transitions. Word has length 39 [2020-10-27 20:19:59,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:19:59,937 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 48 transitions. [2020-10-27 20:19:59,938 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 20:19:59,938 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 48 transitions. [2020-10-27 20:19:59,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-27 20:19:59,939 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:19:59,939 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:19:59,939 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 20:19:59,939 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:19:59,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:19:59,953 INFO L82 PathProgramCache]: Analyzing trace with hash -1452135182, now seen corresponding path program 6 times [2020-10-27 20:19:59,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:19:59,954 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [88549810] [2020-10-27 20:19:59,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:19:59,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:19:59,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:19:59,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:20:00,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:20:00,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:20:00,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:20:00,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:20:01,649 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:20:01,649 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-27 20:20:01,649 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 20:20:01,649 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1683 [2020-10-27 20:20:01,650 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:20:01,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 20:20:01,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:20:01,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-27 20:20:01,650 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:20:01,753 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:20:01,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:20:01,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:20:01,759 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:20:01,759 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:20:01,760 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:20:01,762 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:20:01,762 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:20:01,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:20:01,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:20:01,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:20:01,763 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:20:01,771 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 66 proven. 57 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-27 20:20:01,772 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [88549810] [2020-10-27 20:20:01,772 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:20:01,772 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 20:20:01,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72444319] [2020-10-27 20:20:01,774 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 20:20:01,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:20:01,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 20:20:01,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-27 20:20:01,780 INFO L87 Difference]: Start difference. First operand 43 states and 48 transitions. Second operand 10 states. [2020-10-27 20:20:02,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:20:02,134 INFO L93 Difference]: Finished difference Result 73 states and 85 transitions. [2020-10-27 20:20:02,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 20:20:02,135 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 42 [2020-10-27 20:20:02,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:20:02,136 INFO L225 Difference]: With dead ends: 73 [2020-10-27 20:20:02,136 INFO L226 Difference]: Without dead ends: 50 [2020-10-27 20:20:02,138 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=108, Invalid=164, Unknown=0, NotChecked=0, Total=272 [2020-10-27 20:20:02,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-27 20:20:02,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2020-10-27 20:20:02,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-27 20:20:02,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 54 transitions. [2020-10-27 20:20:02,154 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 54 transitions. Word has length 42 [2020-10-27 20:20:02,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:20:02,154 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 54 transitions. [2020-10-27 20:20:02,154 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 20:20:02,154 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 54 transitions. [2020-10-27 20:20:02,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-27 20:20:02,159 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:20:02,159 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 7, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:20:02,159 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 20:20:02,159 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:20:02,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:20:02,160 INFO L82 PathProgramCache]: Analyzing trace with hash -1124962254, now seen corresponding path program 7 times [2020-10-27 20:20:02,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:20:02,162 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1903727959] [2020-10-27 20:20:02,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:20:02,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:20:02,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:20:02,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:20:02,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:20:02,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:20:02,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:20:02,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:20:02,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:20:03,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:20:05,211 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:20:05,212 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-27 20:20:05,212 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 20:20:05,212 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3018 [2020-10-27 20:20:05,212 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:20:05,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 20:20:05,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-27 20:20:05,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-27 20:20:05,213 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:20:05,316 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:20:05,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:20:05,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:20:05,322 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:20:05,322 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:20:05,322 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:20:05,322 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:20:05,323 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:20:05,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:20:05,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:20:05,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:20:05,323 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:20:05,329 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 126 proven. 57 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-27 20:20:05,330 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1903727959] [2020-10-27 20:20:05,330 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:20:05,330 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 20:20:05,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25646733] [2020-10-27 20:20:05,332 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 20:20:05,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:20:05,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 20:20:05,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-27 20:20:05,333 INFO L87 Difference]: Start difference. First operand 49 states and 54 transitions. Second operand 9 states. [2020-10-27 20:20:05,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:20:05,653 INFO L93 Difference]: Finished difference Result 72 states and 82 transitions. [2020-10-27 20:20:05,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 20:20:05,653 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 48 [2020-10-27 20:20:05,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:20:05,654 INFO L225 Difference]: With dead ends: 72 [2020-10-27 20:20:05,654 INFO L226 Difference]: Without dead ends: 65 [2020-10-27 20:20:05,655 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2020-10-27 20:20:05,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-27 20:20:05,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 52. [2020-10-27 20:20:05,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-27 20:20:05,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 58 transitions. [2020-10-27 20:20:05,663 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 58 transitions. Word has length 48 [2020-10-27 20:20:05,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:20:05,664 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 58 transitions. [2020-10-27 20:20:05,664 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 20:20:05,664 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 58 transitions. [2020-10-27 20:20:05,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-27 20:20:05,665 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:20:05,665 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:20:05,665 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 20:20:05,665 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:20:05,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:20:05,666 INFO L82 PathProgramCache]: Analyzing trace with hash 1467923282, now seen corresponding path program 8 times [2020-10-27 20:20:05,666 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:20:05,666 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1796007704] [2020-10-27 20:20:05,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:20:05,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:20:05,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:20:05,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:20:05,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:20:05,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:20:05,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:20:05,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:20:06,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:20:06,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:20:10,605 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:20:10,605 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-27 20:20:10,605 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 20:20:10,605 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4926 [2020-10-27 20:20:10,605 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:20:10,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 20:20:10,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 20:20:10,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-27 20:20:10,606 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:20:10,708 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:20:10,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:20:10,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:20:10,714 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:20:10,714 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:20:10,714 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:20:10,715 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:20:10,715 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:20:10,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:20:10,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:20:10,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:20:10,716 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:20:10,723 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 133 proven. 86 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-27 20:20:10,724 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1796007704] [2020-10-27 20:20:10,724 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:20:10,724 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 20:20:10,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450041981] [2020-10-27 20:20:10,725 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 20:20:10,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:20:10,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 20:20:10,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-27 20:20:10,726 INFO L87 Difference]: Start difference. First operand 52 states and 58 transitions. Second operand 10 states. [2020-10-27 20:20:11,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:20:11,024 INFO L93 Difference]: Finished difference Result 78 states and 90 transitions. [2020-10-27 20:20:11,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 20:20:11,027 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 51 [2020-10-27 20:20:11,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:20:11,028 INFO L225 Difference]: With dead ends: 78 [2020-10-27 20:20:11,028 INFO L226 Difference]: Without dead ends: 71 [2020-10-27 20:20:11,032 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=108, Invalid=164, Unknown=0, NotChecked=0, Total=272 [2020-10-27 20:20:11,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-27 20:20:11,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 55. [2020-10-27 20:20:11,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-27 20:20:11,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 62 transitions. [2020-10-27 20:20:11,050 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 62 transitions. Word has length 51 [2020-10-27 20:20:11,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:20:11,050 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 62 transitions. [2020-10-27 20:20:11,050 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 20:20:11,051 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 62 transitions. [2020-10-27 20:20:11,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-27 20:20:11,051 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:20:11,051 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:20:11,052 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 20:20:11,052 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:20:11,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:20:11,052 INFO L82 PathProgramCache]: Analyzing trace with hash 1134107698, now seen corresponding path program 9 times [2020-10-27 20:20:11,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:20:11,054 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1585261461] [2020-10-27 20:20:11,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:20:11,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:20:11,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:20:11,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:20:11,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:20:11,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:20:11,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:20:11,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:20:11,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:20:11,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:20:14,192 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:20:14,192 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-27 20:20:14,192 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 20:20:14,192 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3113 [2020-10-27 20:20:14,192 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:20:14,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-27 20:20:14,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:20:14,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-27 20:20:14,193 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:20:14,314 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:20:14,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:20:14,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:20:14,320 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:20:14,320 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:20:14,320 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:20:14,321 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:20:14,321 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:20:14,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:20:14,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:20:14,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:20:14,322 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:20:14,328 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 134 proven. 121 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-27 20:20:14,329 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1585261461] [2020-10-27 20:20:14,329 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:20:14,329 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 20:20:14,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918304376] [2020-10-27 20:20:14,330 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 20:20:14,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:20:14,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 20:20:14,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-27 20:20:14,331 INFO L87 Difference]: Start difference. First operand 55 states and 62 transitions. Second operand 11 states. [2020-10-27 20:20:14,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:20:14,695 INFO L93 Difference]: Finished difference Result 84 states and 98 transitions. [2020-10-27 20:20:14,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 20:20:14,698 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 54 [2020-10-27 20:20:14,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:20:14,699 INFO L225 Difference]: With dead ends: 84 [2020-10-27 20:20:14,699 INFO L226 Difference]: Without dead ends: 77 [2020-10-27 20:20:14,700 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=135, Invalid=207, Unknown=0, NotChecked=0, Total=342 [2020-10-27 20:20:14,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-27 20:20:14,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 58. [2020-10-27 20:20:14,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-27 20:20:14,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 66 transitions. [2020-10-27 20:20:14,727 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 66 transitions. Word has length 54 [2020-10-27 20:20:14,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:20:14,728 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 66 transitions. [2020-10-27 20:20:14,728 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 20:20:14,728 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 66 transitions. [2020-10-27 20:20:14,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-27 20:20:14,729 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:20:14,729 INFO L422 BasicCegarLoop]: trace histogram [15, 14, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:20:14,729 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 20:20:14,730 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:20:14,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:20:14,730 INFO L82 PathProgramCache]: Analyzing trace with hash -716665006, now seen corresponding path program 10 times [2020-10-27 20:20:14,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:20:14,731 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1255916098] [2020-10-27 20:20:14,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:20:14,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:20:14,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:20:14,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:20:14,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:20:14,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:20:14,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:20:14,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:20:14,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:20:15,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:20:16,246 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:20:16,246 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-27 20:20:16,246 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 20:20:16,246 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1493 [2020-10-27 20:20:16,247 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:20:16,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 20:20:16,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:20:16,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-27 20:20:16,247 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:20:16,454 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:20:16,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:20:16,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:20:16,461 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:20:16,461 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:20:16,462 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:20:16,462 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 20:20:16,462 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:20:16,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:20:16,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:20:16,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:20:16,463 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:20:16,475 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 88 proven. 222 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-27 20:20:16,476 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1255916098] [2020-10-27 20:20:16,476 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:20:16,476 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 20:20:16,476 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923689714] [2020-10-27 20:20:16,478 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 20:20:16,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:20:16,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 20:20:16,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-27 20:20:16,480 INFO L87 Difference]: Start difference. First operand 58 states and 66 transitions. Second operand 16 states. [2020-10-27 20:20:17,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:20:17,143 INFO L93 Difference]: Finished difference Result 109 states and 131 transitions. [2020-10-27 20:20:17,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 20:20:17,144 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 57 [2020-10-27 20:20:17,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:20:17,145 INFO L225 Difference]: With dead ends: 109 [2020-10-27 20:20:17,145 INFO L226 Difference]: Without dead ends: 77 [2020-10-27 20:20:17,146 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=315, Invalid=497, Unknown=0, NotChecked=0, Total=812 [2020-10-27 20:20:17,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-27 20:20:17,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 76. [2020-10-27 20:20:17,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-27 20:20:17,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 84 transitions. [2020-10-27 20:20:17,170 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 84 transitions. Word has length 57 [2020-10-27 20:20:17,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:20:17,172 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 84 transitions. [2020-10-27 20:20:17,172 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 20:20:17,172 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 84 transitions. [2020-10-27 20:20:17,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-27 20:20:17,173 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:20:17,174 INFO L422 BasicCegarLoop]: trace histogram [21, 20, 13, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:20:17,174 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 20:20:17,174 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:20:17,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:20:17,175 INFO L82 PathProgramCache]: Analyzing trace with hash 1187470738, now seen corresponding path program 11 times [2020-10-27 20:20:17,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:20:17,180 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [578336635] [2020-10-27 20:20:17,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:20:17,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:20:17,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:20:17,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:20:17,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:20:17,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:20:17,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:20:17,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:20:17,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:20:19,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:20:19,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:20:19,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:20:19,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:20:19,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:20:20,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:20:21,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:20:22,198 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:20:22,198 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-27 20:20:22,199 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-27 20:20:22,199 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-27 20:20:22,199 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:20:22,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-27 20:20:22,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-27 20:20:22,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-27 20:20:22,200 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:20:22,334 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:20:22,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:20:22,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:20:22,341 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:20:22,341 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:20:22,341 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:20:22,341 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:20:22,341 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:20:22,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:20:22,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:20:22,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:20:22,342 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:20:22,349 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 417 proven. 162 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2020-10-27 20:20:22,350 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [578336635] [2020-10-27 20:20:22,350 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:20:22,350 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 20:20:22,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529891565] [2020-10-27 20:20:22,351 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 20:20:22,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:20:22,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 20:20:22,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-27 20:20:22,352 INFO L87 Difference]: Start difference. First operand 76 states and 84 transitions. Second operand 12 states. [2020-10-27 20:20:22,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:20:22,776 INFO L93 Difference]: Finished difference Result 108 states and 124 transitions. [2020-10-27 20:20:22,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 20:20:22,777 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 75 [2020-10-27 20:20:22,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:20:22,778 INFO L225 Difference]: With dead ends: 108 [2020-10-27 20:20:22,778 INFO L226 Difference]: Without dead ends: 101 [2020-10-27 20:20:22,779 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=165, Invalid=255, Unknown=0, NotChecked=0, Total=420 [2020-10-27 20:20:22,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-27 20:20:22,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 79. [2020-10-27 20:20:22,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-27 20:20:22,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 88 transitions. [2020-10-27 20:20:22,793 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 88 transitions. Word has length 75 [2020-10-27 20:20:22,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:20:22,793 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 88 transitions. [2020-10-27 20:20:22,793 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 20:20:22,793 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 88 transitions. [2020-10-27 20:20:22,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-27 20:20:22,797 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:20:22,797 INFO L422 BasicCegarLoop]: trace histogram [22, 21, 13, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:20:22,797 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 20:20:22,797 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:20:22,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:20:22,798 INFO L82 PathProgramCache]: Analyzing trace with hash -116239886, now seen corresponding path program 12 times [2020-10-27 20:20:22,798 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:20:22,798 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1328577714] [2020-10-27 20:20:22,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:20:22,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:20:22,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:20:22,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:20:23,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:20:23,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:20:23,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:20:23,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:20:24,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:20:24,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:20:24,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:20:24,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:20:24,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:20:24,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:20:24,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:20:24,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:20:27,818 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:20:27,818 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 20:20:27,818 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-27 20:20:27,818 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-27 20:20:27,819 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:20:27,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-27 20:20:27,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-27 20:20:27,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-27 20:20:27,819 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:20:27,959 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:20:27,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:20:27,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:20:27,964 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:20:27,965 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:20:27,965 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:20:27,965 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:20:27,965 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:20:27,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:20:27,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:20:27,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:20:27,966 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:20:27,975 INFO L134 CoverageAnalysis]: Checked inductivity of 693 backedges. 442 proven. 209 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2020-10-27 20:20:27,975 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1328577714] [2020-10-27 20:20:27,976 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:20:27,976 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 20:20:27,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906983691] [2020-10-27 20:20:27,976 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 20:20:27,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:20:27,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 20:20:27,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-27 20:20:27,978 INFO L87 Difference]: Start difference. First operand 79 states and 88 transitions. Second operand 13 states. [2020-10-27 20:20:28,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:20:28,548 INFO L93 Difference]: Finished difference Result 114 states and 132 transitions. [2020-10-27 20:20:28,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 20:20:28,549 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 78 [2020-10-27 20:20:28,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:20:28,550 INFO L225 Difference]: With dead ends: 114 [2020-10-27 20:20:28,551 INFO L226 Difference]: Without dead ends: 107 [2020-10-27 20:20:28,552 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=198, Invalid=308, Unknown=0, NotChecked=0, Total=506 [2020-10-27 20:20:28,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-27 20:20:28,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 82. [2020-10-27 20:20:28,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-27 20:20:28,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 92 transitions. [2020-10-27 20:20:28,565 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 92 transitions. Word has length 78 [2020-10-27 20:20:28,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:20:28,565 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 92 transitions. [2020-10-27 20:20:28,565 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 20:20:28,565 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 92 transitions. [2020-10-27 20:20:28,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-27 20:20:28,566 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:20:28,567 INFO L422 BasicCegarLoop]: trace histogram [23, 22, 13, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:20:28,567 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 20:20:28,567 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:20:28,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:20:28,567 INFO L82 PathProgramCache]: Analyzing trace with hash 429818258, now seen corresponding path program 13 times [2020-10-27 20:20:28,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:20:28,568 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [269072154] [2020-10-27 20:20:28,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:20:28,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:20:28,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:20:28,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:20:28,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:20:28,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:20:28,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:20:30,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:20:30,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:20:30,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:20:30,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:20:30,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:20:30,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:20:30,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:20:31,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:20:31,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:20:33,586 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:20:33,586 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-27 20:20:33,586 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-27 20:20:33,586 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-27 20:20:33,586 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:20:33,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-27 20:20:33,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-27 20:20:33,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-27 20:20:33,587 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:20:33,797 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:20:33,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:20:33,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:20:33,803 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:20:33,803 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:20:33,804 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:20:33,804 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:20:33,804 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:20:33,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:20:33,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:20:33,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:20:33,805 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:20:33,820 INFO L134 CoverageAnalysis]: Checked inductivity of 759 backedges. 461 proven. 262 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-27 20:20:33,820 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [269072154] [2020-10-27 20:20:33,821 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:20:33,821 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 20:20:33,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970261426] [2020-10-27 20:20:33,821 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 20:20:33,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:20:33,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 20:20:33,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-27 20:20:33,822 INFO L87 Difference]: Start difference. First operand 82 states and 92 transitions. Second operand 14 states. [2020-10-27 20:20:34,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:20:34,344 INFO L93 Difference]: Finished difference Result 120 states and 140 transitions. [2020-10-27 20:20:34,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 20:20:34,345 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 81 [2020-10-27 20:20:34,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:20:34,346 INFO L225 Difference]: With dead ends: 120 [2020-10-27 20:20:34,346 INFO L226 Difference]: Without dead ends: 113 [2020-10-27 20:20:34,347 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=234, Invalid=366, Unknown=0, NotChecked=0, Total=600 [2020-10-27 20:20:34,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-27 20:20:34,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 85. [2020-10-27 20:20:34,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-27 20:20:34,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 96 transitions. [2020-10-27 20:20:34,360 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 96 transitions. Word has length 81 [2020-10-27 20:20:34,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:20:34,361 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 96 transitions. [2020-10-27 20:20:34,361 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 20:20:34,361 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 96 transitions. [2020-10-27 20:20:34,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-27 20:20:34,362 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:20:34,362 INFO L422 BasicCegarLoop]: trace histogram [24, 23, 13, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:20:34,362 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-27 20:20:34,362 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:20:34,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:20:34,363 INFO L82 PathProgramCache]: Analyzing trace with hash -1288131086, now seen corresponding path program 14 times [2020-10-27 20:20:34,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:20:34,363 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1354347048] [2020-10-27 20:20:34,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:20:34,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:20:34,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:20:34,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:20:34,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:20:34,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:20:34,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:20:34,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:20:34,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:20:34,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:20:34,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:20:34,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:20:35,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:20:36,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:20:36,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:20:37,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:20:39,378 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:20:39,378 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-27 20:20:39,378 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-27 20:20:39,378 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-27 20:20:39,378 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:20:39,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-27 20:20:39,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-27 20:20:39,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 67 [2020-10-27 20:20:39,379 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:20:39,544 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:20:39,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:20:39,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:20:39,549 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:20:39,549 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:20:39,549 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:20:39,549 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:20:39,549 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:20:39,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:20:39,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:20:39,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:20:39,550 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:20:39,561 INFO L134 CoverageAnalysis]: Checked inductivity of 828 backedges. 474 proven. 321 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-10-27 20:20:39,562 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1354347048] [2020-10-27 20:20:39,562 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:20:39,562 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 20:20:39,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345111934] [2020-10-27 20:20:39,563 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 20:20:39,563 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:20:39,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 20:20:39,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-27 20:20:39,577 INFO L87 Difference]: Start difference. First operand 85 states and 96 transitions. Second operand 15 states. [2020-10-27 20:20:40,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:20:40,266 INFO L93 Difference]: Finished difference Result 126 states and 148 transitions. [2020-10-27 20:20:40,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 20:20:40,267 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 84 [2020-10-27 20:20:40,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:20:40,268 INFO L225 Difference]: With dead ends: 126 [2020-10-27 20:20:40,268 INFO L226 Difference]: Without dead ends: 119 [2020-10-27 20:20:40,270 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=273, Invalid=429, Unknown=0, NotChecked=0, Total=702 [2020-10-27 20:20:40,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-10-27 20:20:40,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 88. [2020-10-27 20:20:40,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-27 20:20:40,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 100 transitions. [2020-10-27 20:20:40,294 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 100 transitions. Word has length 84 [2020-10-27 20:20:40,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:20:40,294 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 100 transitions. [2020-10-27 20:20:40,295 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 20:20:40,295 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 100 transitions. [2020-10-27 20:20:40,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-27 20:20:40,296 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:20:40,296 INFO L422 BasicCegarLoop]: trace histogram [25, 24, 13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:20:40,296 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-27 20:20:40,297 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:20:40,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:20:40,298 INFO L82 PathProgramCache]: Analyzing trace with hash -1886739054, now seen corresponding path program 15 times [2020-10-27 20:20:40,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:20:40,299 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [382359256] [2020-10-27 20:20:40,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:20:40,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:20:40,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:20:40,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:20:40,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:20:41,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:20:41,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:20:41,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:20:41,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:20:41,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:20:41,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:20:41,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:20:41,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:20:41,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:20:42,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:20:42,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:20:45,330 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:20:45,330 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 97 [2020-10-27 20:20:45,330 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-27 20:20:45,330 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-27 20:20:45,330 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:20:45,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-27 20:20:45,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 20:20:45,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 73 [2020-10-27 20:20:45,331 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:20:45,522 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:20:45,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:20:45,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:20:45,529 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:20:45,529 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:20:45,530 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:20:45,530 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:20:45,530 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:20:45,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:20:45,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:20:45,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:20:45,531 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:20:45,543 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 481 proven. 386 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-10-27 20:20:45,543 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [382359256] [2020-10-27 20:20:45,544 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:20:45,544 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 20:20:45,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437222098] [2020-10-27 20:20:45,547 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 20:20:45,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:20:45,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 20:20:45,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-27 20:20:45,552 INFO L87 Difference]: Start difference. First operand 88 states and 100 transitions. Second operand 16 states. [2020-10-27 20:20:46,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:20:46,081 INFO L93 Difference]: Finished difference Result 132 states and 156 transitions. [2020-10-27 20:20:46,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 20:20:46,082 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 87 [2020-10-27 20:20:46,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:20:46,083 INFO L225 Difference]: With dead ends: 132 [2020-10-27 20:20:46,083 INFO L226 Difference]: Without dead ends: 125 [2020-10-27 20:20:46,084 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=315, Invalid=497, Unknown=0, NotChecked=0, Total=812 [2020-10-27 20:20:46,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-27 20:20:46,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 91. [2020-10-27 20:20:46,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-27 20:20:46,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 104 transitions. [2020-10-27 20:20:46,102 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 104 transitions. Word has length 87 [2020-10-27 20:20:46,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:20:46,102 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 104 transitions. [2020-10-27 20:20:46,102 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 20:20:46,102 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 104 transitions. [2020-10-27 20:20:46,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-10-27 20:20:46,103 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:20:46,103 INFO L422 BasicCegarLoop]: trace histogram [26, 25, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:20:46,104 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-27 20:20:46,104 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:20:46,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:20:46,104 INFO L82 PathProgramCache]: Analyzing trace with hash 1982466546, now seen corresponding path program 16 times [2020-10-27 20:20:46,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:20:46,106 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [287672213] [2020-10-27 20:20:46,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:20:46,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:20:46,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:20:46,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:20:46,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:20:46,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:20:46,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:20:46,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:20:46,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:20:46,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:20:46,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:20:46,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:20:46,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:20:47,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:20:48,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:20:48,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:20:51,120 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:20:51,121 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-10-27 20:20:51,121 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-27 20:20:51,121 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-27 20:20:51,121 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:20:51,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-27 20:20:51,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:20:51,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-27 20:20:51,121 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:20:51,455 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:20:51,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:20:51,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:20:51,460 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:20:51,461 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:20:51,461 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:20:51,461 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:20:51,461 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:20:51,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:20:51,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:20:51,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:20:51,462 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:20:51,473 INFO L134 CoverageAnalysis]: Checked inductivity of 975 backedges. 373 proven. 551 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2020-10-27 20:20:51,473 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [287672213] [2020-10-27 20:20:51,473 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:20:51,473 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-27 20:20:51,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185929074] [2020-10-27 20:20:51,474 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-27 20:20:51,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:20:51,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-27 20:20:51,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-27 20:20:51,475 INFO L87 Difference]: Start difference. First operand 91 states and 104 transitions. Second operand 23 states. [2020-10-27 20:20:52,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:20:52,457 INFO L93 Difference]: Finished difference Result 160 states and 193 transitions. [2020-10-27 20:20:52,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-27 20:20:52,458 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 90 [2020-10-27 20:20:52,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:20:52,458 INFO L225 Difference]: With dead ends: 160 [2020-10-27 20:20:52,458 INFO L226 Difference]: Without dead ends: 113 [2020-10-27 20:20:52,460 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=693, Invalid=1113, Unknown=0, NotChecked=0, Total=1806 [2020-10-27 20:20:52,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-27 20:20:52,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 112. [2020-10-27 20:20:52,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-10-27 20:20:52,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 125 transitions. [2020-10-27 20:20:52,475 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 125 transitions. Word has length 90 [2020-10-27 20:20:52,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:20:52,476 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 125 transitions. [2020-10-27 20:20:52,476 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-27 20:20:52,476 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 125 transitions. [2020-10-27 20:20:52,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-10-27 20:20:52,480 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:20:52,480 INFO L422 BasicCegarLoop]: trace histogram [33, 32, 20, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:20:52,480 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-27 20:20:52,480 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:20:52,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:20:52,481 INFO L82 PathProgramCache]: Analyzing trace with hash 1518086992, now seen corresponding path program 17 times [2020-10-27 20:20:52,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:20:52,481 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [905051770] [2020-10-27 20:20:52,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:20:52,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:20:52,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:20:52,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:20:52,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:20:52,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:20:52,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:20:52,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:20:52,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:20:52,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:20:52,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:20:53,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:20:53,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:20:53,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:20:54,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:20:56,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:20:56,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:20:56,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:20:56,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:20:56,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:20:56,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:20:57,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:20:57,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:20:57,497 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:20:57,497 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 121 [2020-10-27 20:20:57,497 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 21 [2020-10-27 20:20:57,497 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-27 20:20:57,497 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:20:57,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-27 20:20:57,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-27 20:20:57,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 79 [2020-10-27 20:20:57,498 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:20:57,716 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:20:57,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:20:57,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:20:57,721 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:20:57,722 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:20:57,722 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:20:57,722 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:20:57,722 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:20:57,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:20:57,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:20:57,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:20:57,723 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:20:57,739 INFO L134 CoverageAnalysis]: Checked inductivity of 1584 backedges. 1028 proven. 457 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2020-10-27 20:20:57,739 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [905051770] [2020-10-27 20:20:57,739 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:20:57,739 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-27 20:20:57,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365481882] [2020-10-27 20:20:57,740 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-27 20:20:57,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:20:57,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-27 20:20:57,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-27 20:20:57,741 INFO L87 Difference]: Start difference. First operand 112 states and 125 transitions. Second operand 17 states. [2020-10-27 20:20:58,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:20:58,309 INFO L93 Difference]: Finished difference Result 159 states and 185 transitions. [2020-10-27 20:20:58,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 20:20:58,310 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 111 [2020-10-27 20:20:58,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:20:58,312 INFO L225 Difference]: With dead ends: 159 [2020-10-27 20:20:58,312 INFO L226 Difference]: Without dead ends: 152 [2020-10-27 20:20:58,313 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=360, Invalid=570, Unknown=0, NotChecked=0, Total=930 [2020-10-27 20:20:58,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-10-27 20:20:58,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 115. [2020-10-27 20:20:58,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-10-27 20:20:58,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 129 transitions. [2020-10-27 20:20:58,328 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 129 transitions. Word has length 111 [2020-10-27 20:20:58,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:20:58,329 INFO L481 AbstractCegarLoop]: Abstraction has 115 states and 129 transitions. [2020-10-27 20:20:58,329 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-27 20:20:58,329 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 129 transitions. [2020-10-27 20:20:58,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-10-27 20:20:58,330 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:20:58,330 INFO L422 BasicCegarLoop]: trace histogram [34, 33, 20, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:20:58,330 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-27 20:20:58,331 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:20:58,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:20:58,331 INFO L82 PathProgramCache]: Analyzing trace with hash 912573300, now seen corresponding path program 18 times [2020-10-27 20:20:58,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:20:58,332 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1019398915] [2020-10-27 20:20:58,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:20:58,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:20:58,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:20:58,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:20:58,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:20:58,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:20:58,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:20:58,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:20:58,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:20:58,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:20:59,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:20:59,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:00,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:00,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:01,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:01,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:03,348 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:21:03,348 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 124 [2020-10-27 20:21:03,348 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-27 20:21:03,348 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-27 20:21:03,348 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:21:03,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-27 20:21:03,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:21:03,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 96 [2020-10-27 20:21:03,349 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:21:04,178 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:21:04,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:21:04,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:04,183 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:21:04,184 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:21:04,184 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:21:04,184 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:21:04,184 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:21:04,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:21:04,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:21:04,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:21:04,185 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:21:04,202 INFO L134 CoverageAnalysis]: Checked inductivity of 1683 backedges. 221 proven. 1457 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-27 20:21:04,203 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1019398915] [2020-10-27 20:21:04,203 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:21:04,203 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-27 20:21:04,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982501449] [2020-10-27 20:21:04,204 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-27 20:21:04,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:21:04,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-27 20:21:04,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-27 20:21:04,205 INFO L87 Difference]: Start difference. First operand 115 states and 129 transitions. Second operand 35 states. [2020-10-27 20:21:06,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:21:06,339 INFO L93 Difference]: Finished difference Result 202 states and 242 transitions. [2020-10-27 20:21:06,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-27 20:21:06,339 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 114 [2020-10-27 20:21:06,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:21:06,340 INFO L225 Difference]: With dead ends: 202 [2020-10-27 20:21:06,340 INFO L226 Difference]: Without dead ends: 152 [2020-10-27 20:21:06,343 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 527 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1683, Invalid=2739, Unknown=0, NotChecked=0, Total=4422 [2020-10-27 20:21:06,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-10-27 20:21:06,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 151. [2020-10-27 20:21:06,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2020-10-27 20:21:06,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 165 transitions. [2020-10-27 20:21:06,359 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 165 transitions. Word has length 114 [2020-10-27 20:21:06,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:21:06,360 INFO L481 AbstractCegarLoop]: Abstraction has 151 states and 165 transitions. [2020-10-27 20:21:06,360 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-27 20:21:06,360 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 165 transitions. [2020-10-27 20:21:06,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2020-10-27 20:21:06,362 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:21:06,362 INFO L422 BasicCegarLoop]: trace histogram [46, 45, 32, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:21:06,362 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-27 20:21:06,362 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:21:06,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:21:06,363 INFO L82 PathProgramCache]: Analyzing trace with hash -1164491020, now seen corresponding path program 19 times [2020-10-27 20:21:06,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:21:06,363 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1053906365] [2020-10-27 20:21:06,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:21:06,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:21:06,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:06,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:06,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:06,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:06,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:06,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:07,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:07,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:08,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:08,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:08,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:08,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:08,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:08,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:08,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:08,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:08,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:08,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:08,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:08,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:09,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:09,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:09,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:09,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:10,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:11,392 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:21:11,392 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 160 [2020-10-27 20:21:11,392 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 25 [2020-10-27 20:21:11,392 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-27 20:21:11,392 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:21:11,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-27 20:21:11,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 65 [2020-10-27 20:21:11,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 85 [2020-10-27 20:21:11,393 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:21:11,636 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:21:11,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:21:11,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:11,640 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:21:11,641 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:21:11,641 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:21:11,641 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:21:11,641 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:21:11,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:21:11,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:21:11,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:21:11,641 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:21:11,660 INFO L134 CoverageAnalysis]: Checked inductivity of 3105 backedges. 2073 proven. 534 refuted. 0 times theorem prover too weak. 498 trivial. 0 not checked. [2020-10-27 20:21:11,660 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1053906365] [2020-10-27 20:21:11,660 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:21:11,660 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-27 20:21:11,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602910307] [2020-10-27 20:21:11,661 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-27 20:21:11,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:21:11,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-27 20:21:11,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-27 20:21:11,662 INFO L87 Difference]: Start difference. First operand 151 states and 165 transitions. Second operand 18 states. [2020-10-27 20:21:12,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:21:12,364 INFO L93 Difference]: Finished difference Result 201 states and 229 transitions. [2020-10-27 20:21:12,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 20:21:12,364 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 150 [2020-10-27 20:21:12,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:21:12,366 INFO L225 Difference]: With dead ends: 201 [2020-10-27 20:21:12,366 INFO L226 Difference]: Without dead ends: 194 [2020-10-27 20:21:12,367 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=408, Invalid=648, Unknown=0, NotChecked=0, Total=1056 [2020-10-27 20:21:12,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-10-27 20:21:12,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 154. [2020-10-27 20:21:12,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-10-27 20:21:12,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 169 transitions. [2020-10-27 20:21:12,392 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 169 transitions. Word has length 150 [2020-10-27 20:21:12,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:21:12,392 INFO L481 AbstractCegarLoop]: Abstraction has 154 states and 169 transitions. [2020-10-27 20:21:12,392 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-27 20:21:12,393 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 169 transitions. [2020-10-27 20:21:12,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2020-10-27 20:21:12,395 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:21:12,396 INFO L422 BasicCegarLoop]: trace histogram [47, 46, 32, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:21:12,396 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-27 20:21:12,396 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:21:12,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:21:12,397 INFO L82 PathProgramCache]: Analyzing trace with hash 687494480, now seen corresponding path program 20 times [2020-10-27 20:21:12,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:21:12,397 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [27364644] [2020-10-27 20:21:12,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:21:12,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:21:12,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:12,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:12,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:12,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:12,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:13,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:14,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:14,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:15,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:15,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:16,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:16,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:16,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:16,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:16,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:16,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:16,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:16,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:16,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:16,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:16,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:16,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:16,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:16,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:16,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:16,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:16,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:17,471 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:21:17,471 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 163 [2020-10-27 20:21:17,471 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 27 [2020-10-27 20:21:17,471 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5046 [2020-10-27 20:21:17,471 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:21:17,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-27 20:21:17,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 62 [2020-10-27 20:21:17,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 91 [2020-10-27 20:21:17,472 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:21:17,734 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:21:17,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:21:17,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:17,739 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:21:17,740 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:21:17,740 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:21:17,740 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:21:17,740 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:21:17,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:21:17,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:21:17,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:21:17,741 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:21:17,771 INFO L134 CoverageAnalysis]: Checked inductivity of 3243 backedges. 2176 proven. 617 refuted. 0 times theorem prover too weak. 450 trivial. 0 not checked. [2020-10-27 20:21:17,771 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [27364644] [2020-10-27 20:21:17,772 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:21:17,772 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-27 20:21:17,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912457183] [2020-10-27 20:21:17,772 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-27 20:21:17,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:21:17,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-27 20:21:17,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-27 20:21:17,773 INFO L87 Difference]: Start difference. First operand 154 states and 169 transitions. Second operand 19 states. [2020-10-27 20:21:18,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:21:18,471 INFO L93 Difference]: Finished difference Result 207 states and 237 transitions. [2020-10-27 20:21:18,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 20:21:18,471 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 153 [2020-10-27 20:21:18,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:21:18,473 INFO L225 Difference]: With dead ends: 207 [2020-10-27 20:21:18,473 INFO L226 Difference]: Without dead ends: 200 [2020-10-27 20:21:18,474 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=459, Invalid=731, Unknown=0, NotChecked=0, Total=1190 [2020-10-27 20:21:18,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-10-27 20:21:18,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 157. [2020-10-27 20:21:18,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-10-27 20:21:18,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 173 transitions. [2020-10-27 20:21:18,494 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 173 transitions. Word has length 153 [2020-10-27 20:21:18,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:21:18,495 INFO L481 AbstractCegarLoop]: Abstraction has 157 states and 173 transitions. [2020-10-27 20:21:18,495 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-27 20:21:18,495 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 173 transitions. [2020-10-27 20:21:18,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2020-10-27 20:21:18,497 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:21:18,497 INFO L422 BasicCegarLoop]: trace histogram [48, 47, 32, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:21:18,497 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-27 20:21:18,497 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:21:18,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:21:18,498 INFO L82 PathProgramCache]: Analyzing trace with hash 37640564, now seen corresponding path program 21 times [2020-10-27 20:21:18,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:21:18,498 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2089314592] [2020-10-27 20:21:18,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:21:18,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:21:18,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:18,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:19,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:19,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:19,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:19,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:19,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:19,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:19,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:20,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:21,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:21,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:22,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:23,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:23,517 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:21:23,518 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 166 [2020-10-27 20:21:23,518 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-27 20:21:23,518 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-27 20:21:23,518 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:21:23,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 47 [2020-10-27 20:21:23,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:21:23,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 138 [2020-10-27 20:21:23,518 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:21:25,029 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:21:25,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:21:25,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:25,035 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:21:25,035 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:21:25,035 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:21:25,035 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:21:25,036 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:21:25,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:21:25,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:21:25,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:21:25,036 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:21:25,059 INFO L134 CoverageAnalysis]: Checked inductivity of 3384 backedges. 319 proven. 3060 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-27 20:21:25,059 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2089314592] [2020-10-27 20:21:25,059 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:21:25,059 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2020-10-27 20:21:25,059 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588450880] [2020-10-27 20:21:25,060 INFO L461 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-10-27 20:21:25,060 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:21:25,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-10-27 20:21:25,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2020-10-27 20:21:25,061 INFO L87 Difference]: Start difference. First operand 157 states and 173 transitions. Second operand 49 states. [2020-10-27 20:21:28,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:21:28,375 INFO L93 Difference]: Finished difference Result 256 states and 302 transitions. [2020-10-27 20:21:28,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-27 20:21:28,377 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 156 [2020-10-27 20:21:28,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:21:28,379 INFO L225 Difference]: With dead ends: 256 [2020-10-27 20:21:28,379 INFO L226 Difference]: Without dead ends: 200 [2020-10-27 20:21:28,382 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1080 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=3384, Invalid=5546, Unknown=0, NotChecked=0, Total=8930 [2020-10-27 20:21:28,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-10-27 20:21:28,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 199. [2020-10-27 20:21:28,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2020-10-27 20:21:28,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 215 transitions. [2020-10-27 20:21:28,419 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 215 transitions. Word has length 156 [2020-10-27 20:21:28,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:21:28,419 INFO L481 AbstractCegarLoop]: Abstraction has 199 states and 215 transitions. [2020-10-27 20:21:28,419 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-10-27 20:21:28,420 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 215 transitions. [2020-10-27 20:21:28,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2020-10-27 20:21:28,422 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:21:28,422 INFO L422 BasicCegarLoop]: trace histogram [62, 61, 46, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:21:28,422 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-27 20:21:28,422 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:21:28,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:21:28,423 INFO L82 PathProgramCache]: Analyzing trace with hash -152907724, now seen corresponding path program 22 times [2020-10-27 20:21:28,423 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:21:28,423 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1329721878] [2020-10-27 20:21:28,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:21:28,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:21:28,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:29,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:29,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:29,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:30,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:31,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:31,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:31,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:31,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:31,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:31,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:31,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:31,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:31,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:31,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:31,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:31,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:31,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:31,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:31,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:31,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:31,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:32,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:32,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:32,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:32,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:32,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:32,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:32,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:32,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:33,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:33,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:33,464 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:21:33,464 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 208 [2020-10-27 20:21:33,464 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 32 [2020-10-27 20:21:33,464 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-27 20:21:33,464 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:21:33,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-27 20:21:33,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 101 [2020-10-27 20:21:33,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 97 [2020-10-27 20:21:33,465 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:21:33,791 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:21:33,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:21:33,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:33,795 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:21:33,796 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:21:33,796 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:21:33,796 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:21:33,796 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:21:33,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:21:33,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:21:33,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:21:33,797 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:21:33,838 INFO L134 CoverageAnalysis]: Checked inductivity of 5673 backedges. 3617 proven. 706 refuted. 0 times theorem prover too weak. 1350 trivial. 0 not checked. [2020-10-27 20:21:33,838 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1329721878] [2020-10-27 20:21:33,838 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:21:33,839 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-27 20:21:33,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70553078] [2020-10-27 20:21:33,839 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-27 20:21:33,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:21:33,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-27 20:21:33,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-27 20:21:33,840 INFO L87 Difference]: Start difference. First operand 199 states and 215 transitions. Second operand 20 states. [2020-10-27 20:21:34,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:21:34,597 INFO L93 Difference]: Finished difference Result 255 states and 287 transitions. [2020-10-27 20:21:34,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 20:21:34,598 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 198 [2020-10-27 20:21:34,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:21:34,600 INFO L225 Difference]: With dead ends: 255 [2020-10-27 20:21:34,600 INFO L226 Difference]: Without dead ends: 248 [2020-10-27 20:21:34,601 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=513, Invalid=819, Unknown=0, NotChecked=0, Total=1332 [2020-10-27 20:21:34,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2020-10-27 20:21:34,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 202. [2020-10-27 20:21:34,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202 states. [2020-10-27 20:21:34,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 219 transitions. [2020-10-27 20:21:34,620 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 219 transitions. Word has length 198 [2020-10-27 20:21:34,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:21:34,621 INFO L481 AbstractCegarLoop]: Abstraction has 202 states and 219 transitions. [2020-10-27 20:21:34,621 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-27 20:21:34,621 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 219 transitions. [2020-10-27 20:21:34,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2020-10-27 20:21:34,623 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:21:34,624 INFO L422 BasicCegarLoop]: trace histogram [63, 62, 46, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:21:34,624 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-27 20:21:34,624 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:21:34,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:21:34,624 INFO L82 PathProgramCache]: Analyzing trace with hash -1020050416, now seen corresponding path program 23 times [2020-10-27 20:21:34,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:21:34,625 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1291157592] [2020-10-27 20:21:34,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:21:34,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:21:34,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:34,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:35,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:35,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:39,669 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:21:39,669 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 211 [2020-10-27 20:21:39,669 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 20:21:39,669 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-27 20:21:39,670 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:21:39,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 50 [2020-10-27 20:21:39,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:21:39,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 147 [2020-10-27 20:21:39,670 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:21:41,467 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:21:41,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:21:41,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:41,472 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:21:41,473 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:21:41,473 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:21:41,473 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:21:41,473 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:21:41,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:21:41,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:21:41,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:21:41,474 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:21:41,520 INFO L134 CoverageAnalysis]: Checked inductivity of 5859 backedges. 2092 proven. 3480 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2020-10-27 20:21:41,521 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1291157592] [2020-10-27 20:21:41,521 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:21:41,521 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2020-10-27 20:21:41,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314603982] [2020-10-27 20:21:41,523 INFO L461 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-10-27 20:21:41,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:21:41,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-10-27 20:21:41,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2020-10-27 20:21:41,525 INFO L87 Difference]: Start difference. First operand 202 states and 219 transitions. Second operand 52 states. [2020-10-27 20:21:45,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:21:45,472 INFO L93 Difference]: Finished difference Result 271 states and 308 transitions. [2020-10-27 20:21:45,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-10-27 20:21:45,473 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 201 [2020-10-27 20:21:45,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:21:45,475 INFO L225 Difference]: With dead ends: 271 [2020-10-27 20:21:45,475 INFO L226 Difference]: Without dead ends: 212 [2020-10-27 20:21:45,478 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1224 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=3825, Invalid=6275, Unknown=0, NotChecked=0, Total=10100 [2020-10-27 20:21:45,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2020-10-27 20:21:45,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 211. [2020-10-27 20:21:45,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211 states. [2020-10-27 20:21:45,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 228 transitions. [2020-10-27 20:21:45,502 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 228 transitions. Word has length 201 [2020-10-27 20:21:45,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:21:45,502 INFO L481 AbstractCegarLoop]: Abstraction has 211 states and 228 transitions. [2020-10-27 20:21:45,502 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-10-27 20:21:45,503 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 228 transitions. [2020-10-27 20:21:45,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2020-10-27 20:21:45,505 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:21:45,505 INFO L422 BasicCegarLoop]: trace histogram [66, 65, 49, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:21:45,505 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-27 20:21:45,506 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:21:45,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:21:45,506 INFO L82 PathProgramCache]: Analyzing trace with hash 1368247410, now seen corresponding path program 24 times [2020-10-27 20:21:45,506 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:21:45,507 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1799621122] [2020-10-27 20:21:45,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:21:45,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:21:45,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:46,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:46,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:46,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:47,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:47,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:47,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:47,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:49,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:50,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:50,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:50,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:50,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:50,577 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:21:50,577 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 220 [2020-10-27 20:21:50,577 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-27 20:21:50,577 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5025 [2020-10-27 20:21:50,577 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:21:50,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-27 20:21:50,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 107 [2020-10-27 20:21:50,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 103 [2020-10-27 20:21:50,578 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:21:50,895 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:21:50,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:21:50,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:50,899 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:21:50,899 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:21:50,899 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:21:50,899 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:21:50,900 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:21:50,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:21:50,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:21:50,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:21:50,900 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:21:50,944 INFO L134 CoverageAnalysis]: Checked inductivity of 6435 backedges. 4098 proven. 801 refuted. 0 times theorem prover too weak. 1536 trivial. 0 not checked. [2020-10-27 20:21:50,945 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1799621122] [2020-10-27 20:21:50,945 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:21:50,945 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-27 20:21:50,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652682492] [2020-10-27 20:21:50,945 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-27 20:21:50,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:21:50,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-27 20:21:50,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-27 20:21:50,946 INFO L87 Difference]: Start difference. First operand 211 states and 228 transitions. Second operand 21 states. [2020-10-27 20:21:51,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:21:51,758 INFO L93 Difference]: Finished difference Result 270 states and 304 transitions. [2020-10-27 20:21:51,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-27 20:21:51,759 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 210 [2020-10-27 20:21:51,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:21:51,760 INFO L225 Difference]: With dead ends: 270 [2020-10-27 20:21:51,761 INFO L226 Difference]: Without dead ends: 263 [2020-10-27 20:21:51,762 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=570, Invalid=912, Unknown=0, NotChecked=0, Total=1482 [2020-10-27 20:21:51,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2020-10-27 20:21:51,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 214. [2020-10-27 20:21:51,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2020-10-27 20:21:51,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 232 transitions. [2020-10-27 20:21:51,790 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 232 transitions. Word has length 210 [2020-10-27 20:21:51,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:21:51,791 INFO L481 AbstractCegarLoop]: Abstraction has 214 states and 232 transitions. [2020-10-27 20:21:51,791 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-27 20:21:51,791 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 232 transitions. [2020-10-27 20:21:51,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2020-10-27 20:21:51,792 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:21:51,793 INFO L422 BasicCegarLoop]: trace histogram [67, 66, 49, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:21:51,793 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-27 20:21:51,793 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:21:51,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:21:51,794 INFO L82 PathProgramCache]: Analyzing trace with hash -487393518, now seen corresponding path program 25 times [2020-10-27 20:21:51,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:21:51,794 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [755179488] [2020-10-27 20:21:51,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:21:51,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:21:51,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:52,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:52,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:53,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:53,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:53,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:53,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:53,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:53,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:53,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:54,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:54,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:54,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:54,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:54,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:54,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:54,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:55,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:55,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:55,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:56,830 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:21:56,830 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 223 [2020-10-27 20:21:56,830 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 20 [2020-10-27 20:21:56,830 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-27 20:21:56,830 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:21:56,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-27 20:21:56,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 104 [2020-10-27 20:21:56,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 109 [2020-10-27 20:21:56,831 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:21:57,191 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:21:57,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:21:57,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:57,196 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:21:57,196 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:21:57,196 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:21:57,196 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:21:57,196 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:21:57,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:21:57,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:21:57,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:21:57,197 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:21:57,227 INFO L134 CoverageAnalysis]: Checked inductivity of 6633 backedges. 4285 proven. 902 refuted. 0 times theorem prover too weak. 1446 trivial. 0 not checked. [2020-10-27 20:21:57,227 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [755179488] [2020-10-27 20:21:57,227 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:21:57,227 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-27 20:21:57,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696320348] [2020-10-27 20:21:57,228 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-27 20:21:57,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:21:57,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-27 20:21:57,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-27 20:21:57,229 INFO L87 Difference]: Start difference. First operand 214 states and 232 transitions. Second operand 22 states. [2020-10-27 20:21:58,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:21:58,094 INFO L93 Difference]: Finished difference Result 276 states and 312 transitions. [2020-10-27 20:21:58,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-27 20:21:58,095 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 213 [2020-10-27 20:21:58,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:21:58,097 INFO L225 Difference]: With dead ends: 276 [2020-10-27 20:21:58,097 INFO L226 Difference]: Without dead ends: 269 [2020-10-27 20:21:58,098 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=630, Invalid=1010, Unknown=0, NotChecked=0, Total=1640 [2020-10-27 20:21:58,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2020-10-27 20:21:58,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 217. [2020-10-27 20:21:58,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217 states. [2020-10-27 20:21:58,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 236 transitions. [2020-10-27 20:21:58,130 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 236 transitions. Word has length 213 [2020-10-27 20:21:58,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:21:58,131 INFO L481 AbstractCegarLoop]: Abstraction has 217 states and 236 transitions. [2020-10-27 20:21:58,131 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-27 20:21:58,131 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 236 transitions. [2020-10-27 20:21:58,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2020-10-27 20:21:58,132 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:21:58,133 INFO L422 BasicCegarLoop]: trace histogram [68, 67, 49, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:21:58,133 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-27 20:21:58,133 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:21:58,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:21:58,133 INFO L82 PathProgramCache]: Analyzing trace with hash -1362212750, now seen corresponding path program 26 times [2020-10-27 20:21:58,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:21:58,134 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1253888687] [2020-10-27 20:21:58,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:21:58,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:21:58,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:59,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:59,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:59,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:59,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:59,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:21:59,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:00,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:00,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:00,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:00,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:00,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:00,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:00,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:00,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:00,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:01,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:01,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:01,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:01,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:01,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:02,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:02,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:03,176 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:22:03,177 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 226 [2020-10-27 20:22:03,177 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 23 [2020-10-27 20:22:03,177 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-27 20:22:03,177 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:22:03,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-27 20:22:03,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 101 [2020-10-27 20:22:03,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 115 [2020-10-27 20:22:03,178 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:22:03,581 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:22:03,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:22:03,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:03,586 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:22:03,587 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:22:03,587 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:22:03,587 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:22:03,587 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:22:03,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:22:03,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:22:03,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:22:03,588 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:22:03,640 INFO L134 CoverageAnalysis]: Checked inductivity of 6834 backedges. 4466 proven. 1009 refuted. 0 times theorem prover too weak. 1359 trivial. 0 not checked. [2020-10-27 20:22:03,640 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1253888687] [2020-10-27 20:22:03,640 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:22:03,641 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-27 20:22:03,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280207068] [2020-10-27 20:22:03,641 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-27 20:22:03,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:22:03,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-27 20:22:03,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-27 20:22:03,642 INFO L87 Difference]: Start difference. First operand 217 states and 236 transitions. Second operand 23 states. [2020-10-27 20:22:04,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:22:04,652 INFO L93 Difference]: Finished difference Result 282 states and 320 transitions. [2020-10-27 20:22:04,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-27 20:22:04,652 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 216 [2020-10-27 20:22:04,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:22:04,654 INFO L225 Difference]: With dead ends: 282 [2020-10-27 20:22:04,654 INFO L226 Difference]: Without dead ends: 275 [2020-10-27 20:22:04,655 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=693, Invalid=1113, Unknown=0, NotChecked=0, Total=1806 [2020-10-27 20:22:04,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2020-10-27 20:22:04,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 220. [2020-10-27 20:22:04,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 220 states. [2020-10-27 20:22:04,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 240 transitions. [2020-10-27 20:22:04,682 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 240 transitions. Word has length 216 [2020-10-27 20:22:04,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:22:04,683 INFO L481 AbstractCegarLoop]: Abstraction has 220 states and 240 transitions. [2020-10-27 20:22:04,683 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-27 20:22:04,683 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 240 transitions. [2020-10-27 20:22:04,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2020-10-27 20:22:04,684 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:22:04,684 INFO L422 BasicCegarLoop]: trace histogram [69, 68, 49, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:22:04,684 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-27 20:22:04,684 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:22:04,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:22:04,685 INFO L82 PathProgramCache]: Analyzing trace with hash -1240401134, now seen corresponding path program 27 times [2020-10-27 20:22:04,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:22:04,685 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1812785342] [2020-10-27 20:22:04,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:22:04,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:22:04,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:05,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:06,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:06,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:06,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:06,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:06,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:06,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:06,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:06,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:06,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:06,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:09,714 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:22:09,714 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 229 [2020-10-27 20:22:09,714 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-27 20:22:09,714 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-27 20:22:09,714 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:22:09,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 42 [2020-10-27 20:22:09,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 98 [2020-10-27 20:22:09,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 121 [2020-10-27 20:22:09,715 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:22:10,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:22:10,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:22:10,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:10,162 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:22:10,162 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:22:10,162 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:22:10,163 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 20:22:10,163 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:22:10,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:22:10,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:22:10,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:22:10,163 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:22:10,213 INFO L134 CoverageAnalysis]: Checked inductivity of 7038 backedges. 4641 proven. 1122 refuted. 0 times theorem prover too weak. 1275 trivial. 0 not checked. [2020-10-27 20:22:10,213 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1812785342] [2020-10-27 20:22:10,213 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:22:10,213 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-27 20:22:10,214 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332184122] [2020-10-27 20:22:10,214 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-27 20:22:10,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:22:10,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-27 20:22:10,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-27 20:22:10,215 INFO L87 Difference]: Start difference. First operand 220 states and 240 transitions. Second operand 24 states. [2020-10-27 20:22:11,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:22:11,207 INFO L93 Difference]: Finished difference Result 288 states and 328 transitions. [2020-10-27 20:22:11,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-27 20:22:11,207 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 219 [2020-10-27 20:22:11,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:22:11,209 INFO L225 Difference]: With dead ends: 288 [2020-10-27 20:22:11,209 INFO L226 Difference]: Without dead ends: 281 [2020-10-27 20:22:11,210 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=759, Invalid=1221, Unknown=0, NotChecked=0, Total=1980 [2020-10-27 20:22:11,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2020-10-27 20:22:11,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 223. [2020-10-27 20:22:11,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 223 states. [2020-10-27 20:22:11,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 244 transitions. [2020-10-27 20:22:11,241 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 244 transitions. Word has length 219 [2020-10-27 20:22:11,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:22:11,242 INFO L481 AbstractCegarLoop]: Abstraction has 223 states and 244 transitions. [2020-10-27 20:22:11,242 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-27 20:22:11,242 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 244 transitions. [2020-10-27 20:22:11,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2020-10-27 20:22:11,243 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:22:11,243 INFO L422 BasicCegarLoop]: trace histogram [70, 69, 49, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:22:11,244 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-27 20:22:11,244 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:22:11,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:22:11,244 INFO L82 PathProgramCache]: Analyzing trace with hash -1597913998, now seen corresponding path program 28 times [2020-10-27 20:22:11,244 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:22:11,244 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [430110680] [2020-10-27 20:22:11,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:22:11,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:22:11,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:12,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:12,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:13,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:13,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:13,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:13,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:13,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:13,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:16,273 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:22:16,274 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 232 [2020-10-27 20:22:16,274 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-27 20:22:16,274 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-27 20:22:16,274 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:22:16,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 44 [2020-10-27 20:22:16,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 95 [2020-10-27 20:22:16,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 127 [2020-10-27 20:22:16,274 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:22:16,743 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:22:16,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:22:16,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:16,747 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:22:16,747 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:22:16,747 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:22:16,747 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 20:22:16,747 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:22:16,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:22:16,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:22:16,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:22:16,748 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:22:16,784 INFO L134 CoverageAnalysis]: Checked inductivity of 7245 backedges. 4810 proven. 1241 refuted. 0 times theorem prover too weak. 1194 trivial. 0 not checked. [2020-10-27 20:22:16,785 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [430110680] [2020-10-27 20:22:16,785 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:22:16,785 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-27 20:22:16,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643002709] [2020-10-27 20:22:16,785 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-27 20:22:16,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:22:16,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-27 20:22:16,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-27 20:22:16,786 INFO L87 Difference]: Start difference. First operand 223 states and 244 transitions. Second operand 25 states. [2020-10-27 20:22:17,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:22:17,862 INFO L93 Difference]: Finished difference Result 294 states and 336 transitions. [2020-10-27 20:22:17,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-27 20:22:17,863 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 222 [2020-10-27 20:22:17,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:22:17,865 INFO L225 Difference]: With dead ends: 294 [2020-10-27 20:22:17,865 INFO L226 Difference]: Without dead ends: 287 [2020-10-27 20:22:17,866 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=828, Invalid=1334, Unknown=0, NotChecked=0, Total=2162 [2020-10-27 20:22:17,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2020-10-27 20:22:17,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 226. [2020-10-27 20:22:17,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 226 states. [2020-10-27 20:22:17,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 248 transitions. [2020-10-27 20:22:17,905 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 248 transitions. Word has length 222 [2020-10-27 20:22:17,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:22:17,905 INFO L481 AbstractCegarLoop]: Abstraction has 226 states and 248 transitions. [2020-10-27 20:22:17,905 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-27 20:22:17,906 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 248 transitions. [2020-10-27 20:22:17,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2020-10-27 20:22:17,907 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:22:17,907 INFO L422 BasicCegarLoop]: trace histogram [71, 70, 49, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:22:17,907 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-27 20:22:17,908 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:22:17,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:22:17,908 INFO L82 PathProgramCache]: Analyzing trace with hash -744751342, now seen corresponding path program 29 times [2020-10-27 20:22:17,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:22:17,908 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1023703917] [2020-10-27 20:22:17,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:22:17,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:22:17,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:18,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:19,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:19,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:19,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:19,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:19,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:19,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:20,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:20,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:20,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:20,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:20,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:22,947 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:22:22,947 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 235 [2020-10-27 20:22:22,947 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-27 20:22:22,947 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-27 20:22:22,947 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:22:22,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 46 [2020-10-27 20:22:22,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 92 [2020-10-27 20:22:22,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 133 [2020-10-27 20:22:22,948 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:22:23,422 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:22:23,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:22:23,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:23,426 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:22:23,426 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:22:23,426 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:22:23,427 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:22:23,427 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:22:23,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:22:23,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:22:23,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:22:23,427 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:22:23,460 INFO L134 CoverageAnalysis]: Checked inductivity of 7455 backedges. 4973 proven. 1366 refuted. 0 times theorem prover too weak. 1116 trivial. 0 not checked. [2020-10-27 20:22:23,461 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1023703917] [2020-10-27 20:22:23,461 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:22:23,461 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-27 20:22:23,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656759079] [2020-10-27 20:22:23,462 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-27 20:22:23,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:22:23,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-27 20:22:23,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-27 20:22:23,463 INFO L87 Difference]: Start difference. First operand 226 states and 248 transitions. Second operand 26 states. [2020-10-27 20:22:24,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:22:24,604 INFO L93 Difference]: Finished difference Result 300 states and 344 transitions. [2020-10-27 20:22:24,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-27 20:22:24,604 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 225 [2020-10-27 20:22:24,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:22:24,607 INFO L225 Difference]: With dead ends: 300 [2020-10-27 20:22:24,607 INFO L226 Difference]: Without dead ends: 293 [2020-10-27 20:22:24,608 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=900, Invalid=1452, Unknown=0, NotChecked=0, Total=2352 [2020-10-27 20:22:24,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2020-10-27 20:22:24,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 229. [2020-10-27 20:22:24,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 229 states. [2020-10-27 20:22:24,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 252 transitions. [2020-10-27 20:22:24,658 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 252 transitions. Word has length 225 [2020-10-27 20:22:24,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:22:24,659 INFO L481 AbstractCegarLoop]: Abstraction has 229 states and 252 transitions. [2020-10-27 20:22:24,659 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-27 20:22:24,659 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 252 transitions. [2020-10-27 20:22:24,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2020-10-27 20:22:24,661 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:22:24,661 INFO L422 BasicCegarLoop]: trace histogram [72, 71, 49, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:22:24,661 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-27 20:22:24,661 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:22:24,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:22:24,662 INFO L82 PathProgramCache]: Analyzing trace with hash -1792524174, now seen corresponding path program 30 times [2020-10-27 20:22:24,662 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:22:24,662 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [94519051] [2020-10-27 20:22:24,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:22:24,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:22:24,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:25,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:26,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:26,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:26,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:26,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:26,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:27,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:27,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:27,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:27,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:27,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:27,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:27,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:27,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:28,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:28,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:28,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:29,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:29,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:29,705 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:22:29,705 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 238 [2020-10-27 20:22:29,705 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 20 [2020-10-27 20:22:29,705 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-27 20:22:29,706 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:22:29,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 48 [2020-10-27 20:22:29,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 89 [2020-10-27 20:22:29,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 139 [2020-10-27 20:22:29,706 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:22:30,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:22:30,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:22:30,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:30,229 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:22:30,229 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:22:30,229 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:22:30,229 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:22:30,229 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:22:30,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:22:30,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:22:30,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:22:30,230 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:22:30,262 INFO L134 CoverageAnalysis]: Checked inductivity of 7668 backedges. 5130 proven. 1497 refuted. 0 times theorem prover too weak. 1041 trivial. 0 not checked. [2020-10-27 20:22:30,262 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [94519051] [2020-10-27 20:22:30,263 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:22:30,263 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-27 20:22:30,263 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21666694] [2020-10-27 20:22:30,263 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-27 20:22:30,263 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:22:30,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-27 20:22:30,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-27 20:22:30,264 INFO L87 Difference]: Start difference. First operand 229 states and 252 transitions. Second operand 27 states. [2020-10-27 20:22:31,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:22:31,437 INFO L93 Difference]: Finished difference Result 306 states and 352 transitions. [2020-10-27 20:22:31,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-27 20:22:31,438 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 228 [2020-10-27 20:22:31,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:22:31,440 INFO L225 Difference]: With dead ends: 306 [2020-10-27 20:22:31,440 INFO L226 Difference]: Without dead ends: 299 [2020-10-27 20:22:31,441 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=975, Invalid=1575, Unknown=0, NotChecked=0, Total=2550 [2020-10-27 20:22:31,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2020-10-27 20:22:31,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 232. [2020-10-27 20:22:31,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2020-10-27 20:22:31,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 256 transitions. [2020-10-27 20:22:31,494 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 256 transitions. Word has length 228 [2020-10-27 20:22:31,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:22:31,495 INFO L481 AbstractCegarLoop]: Abstraction has 232 states and 256 transitions. [2020-10-27 20:22:31,495 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-27 20:22:31,495 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 256 transitions. [2020-10-27 20:22:31,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2020-10-27 20:22:31,496 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:22:31,496 INFO L422 BasicCegarLoop]: trace histogram [73, 72, 49, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:22:31,496 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-27 20:22:31,496 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:22:31,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:22:31,497 INFO L82 PathProgramCache]: Analyzing trace with hash -170654958, now seen corresponding path program 31 times [2020-10-27 20:22:31,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:22:31,497 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1887566732] [2020-10-27 20:22:31,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:22:31,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:22:31,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:31,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:33,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:33,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:33,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:33,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:34,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:34,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:34,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:34,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:35,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:36,527 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:22:36,527 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 241 [2020-10-27 20:22:36,527 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-27 20:22:36,528 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-27 20:22:36,528 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:22:36,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 50 [2020-10-27 20:22:36,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 86 [2020-10-27 20:22:36,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 145 [2020-10-27 20:22:36,528 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:22:37,093 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:22:37,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:22:37,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:37,098 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:22:37,098 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:22:37,098 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:22:37,098 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:22:37,098 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:22:37,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:22:37,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:22:37,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:22:37,099 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:22:37,133 INFO L134 CoverageAnalysis]: Checked inductivity of 7884 backedges. 5281 proven. 1634 refuted. 0 times theorem prover too weak. 969 trivial. 0 not checked. [2020-10-27 20:22:37,133 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1887566732] [2020-10-27 20:22:37,133 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:22:37,133 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-27 20:22:37,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998543994] [2020-10-27 20:22:37,134 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-27 20:22:37,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:22:37,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-27 20:22:37,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-27 20:22:37,135 INFO L87 Difference]: Start difference. First operand 232 states and 256 transitions. Second operand 28 states. [2020-10-27 20:22:38,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:22:38,421 INFO L93 Difference]: Finished difference Result 312 states and 360 transitions. [2020-10-27 20:22:38,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-27 20:22:38,421 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 231 [2020-10-27 20:22:38,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:22:38,423 INFO L225 Difference]: With dead ends: 312 [2020-10-27 20:22:38,423 INFO L226 Difference]: Without dead ends: 305 [2020-10-27 20:22:38,426 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1053, Invalid=1703, Unknown=0, NotChecked=0, Total=2756 [2020-10-27 20:22:38,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2020-10-27 20:22:38,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 235. [2020-10-27 20:22:38,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 235 states. [2020-10-27 20:22:38,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 260 transitions. [2020-10-27 20:22:38,469 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 260 transitions. Word has length 231 [2020-10-27 20:22:38,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:22:38,469 INFO L481 AbstractCegarLoop]: Abstraction has 235 states and 260 transitions. [2020-10-27 20:22:38,469 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-27 20:22:38,470 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 260 transitions. [2020-10-27 20:22:38,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2020-10-27 20:22:38,471 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:22:38,471 INFO L422 BasicCegarLoop]: trace histogram [74, 73, 49, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:22:38,472 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-27 20:22:38,472 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:22:38,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:22:38,472 INFO L82 PathProgramCache]: Analyzing trace with hash -1446921102, now seen corresponding path program 32 times [2020-10-27 20:22:38,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:22:38,473 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2035206281] [2020-10-27 20:22:38,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:22:38,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:22:38,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:39,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:40,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:40,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:40,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:40,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:41,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:43,513 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:22:43,513 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 244 [2020-10-27 20:22:43,513 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 20:22:43,513 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-27 20:22:43,513 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:22:43,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 52 [2020-10-27 20:22:43,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 83 [2020-10-27 20:22:43,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 151 [2020-10-27 20:22:43,514 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:22:44,111 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:22:44,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:22:44,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:44,115 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:22:44,115 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:22:44,115 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:22:44,116 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 20:22:44,116 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:22:44,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:22:44,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:22:44,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:22:44,116 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:22:44,152 INFO L134 CoverageAnalysis]: Checked inductivity of 8103 backedges. 5426 proven. 1777 refuted. 0 times theorem prover too weak. 900 trivial. 0 not checked. [2020-10-27 20:22:44,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2035206281] [2020-10-27 20:22:44,153 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:22:44,153 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-27 20:22:44,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35104694] [2020-10-27 20:22:44,154 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-27 20:22:44,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:22:44,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-27 20:22:44,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-27 20:22:44,155 INFO L87 Difference]: Start difference. First operand 235 states and 260 transitions. Second operand 29 states. [2020-10-27 20:22:45,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:22:45,507 INFO L93 Difference]: Finished difference Result 318 states and 368 transitions. [2020-10-27 20:22:45,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-27 20:22:45,508 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 234 [2020-10-27 20:22:45,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:22:45,510 INFO L225 Difference]: With dead ends: 318 [2020-10-27 20:22:45,510 INFO L226 Difference]: Without dead ends: 311 [2020-10-27 20:22:45,511 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1134, Invalid=1836, Unknown=0, NotChecked=0, Total=2970 [2020-10-27 20:22:45,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2020-10-27 20:22:45,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 238. [2020-10-27 20:22:45,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 238 states. [2020-10-27 20:22:45,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 264 transitions. [2020-10-27 20:22:45,576 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 264 transitions. Word has length 234 [2020-10-27 20:22:45,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:22:45,577 INFO L481 AbstractCegarLoop]: Abstraction has 238 states and 264 transitions. [2020-10-27 20:22:45,577 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-27 20:22:45,577 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 264 transitions. [2020-10-27 20:22:45,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2020-10-27 20:22:45,578 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:22:45,578 INFO L422 BasicCegarLoop]: trace histogram [75, 74, 49, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:22:45,578 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-27 20:22:45,578 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:22:45,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:22:45,579 INFO L82 PathProgramCache]: Analyzing trace with hash 653854482, now seen corresponding path program 33 times [2020-10-27 20:22:45,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:22:45,579 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [163475067] [2020-10-27 20:22:45,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:22:45,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:22:45,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:46,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:47,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:47,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:47,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:47,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:47,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:47,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:48,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:48,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:48,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:48,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:48,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:49,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:50,611 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:22:50,612 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 247 [2020-10-27 20:22:50,612 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-27 20:22:50,612 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-27 20:22:50,612 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:22:50,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 54 [2020-10-27 20:22:50,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 80 [2020-10-27 20:22:50,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 157 [2020-10-27 20:22:50,612 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:22:51,245 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:22:51,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:22:51,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:51,249 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:22:51,249 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:22:51,249 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:22:51,249 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 20:22:51,249 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:22:51,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:22:51,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:22:51,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:22:51,250 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:22:51,287 INFO L134 CoverageAnalysis]: Checked inductivity of 8325 backedges. 5565 proven. 1926 refuted. 0 times theorem prover too weak. 834 trivial. 0 not checked. [2020-10-27 20:22:51,287 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [163475067] [2020-10-27 20:22:51,288 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:22:51,288 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-27 20:22:51,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523291914] [2020-10-27 20:22:51,288 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-27 20:22:51,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:22:51,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-27 20:22:51,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-27 20:22:51,290 INFO L87 Difference]: Start difference. First operand 238 states and 264 transitions. Second operand 30 states. [2020-10-27 20:22:52,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:22:52,694 INFO L93 Difference]: Finished difference Result 324 states and 376 transitions. [2020-10-27 20:22:52,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-27 20:22:52,695 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 237 [2020-10-27 20:22:52,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:22:52,697 INFO L225 Difference]: With dead ends: 324 [2020-10-27 20:22:52,697 INFO L226 Difference]: Without dead ends: 317 [2020-10-27 20:22:52,698 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1218, Invalid=1974, Unknown=0, NotChecked=0, Total=3192 [2020-10-27 20:22:52,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2020-10-27 20:22:52,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 241. [2020-10-27 20:22:52,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 241 states. [2020-10-27 20:22:52,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 268 transitions. [2020-10-27 20:22:52,783 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 268 transitions. Word has length 237 [2020-10-27 20:22:52,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:22:52,784 INFO L481 AbstractCegarLoop]: Abstraction has 241 states and 268 transitions. [2020-10-27 20:22:52,784 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-27 20:22:52,784 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 268 transitions. [2020-10-27 20:22:52,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2020-10-27 20:22:52,785 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:22:52,786 INFO L422 BasicCegarLoop]: trace histogram [76, 75, 49, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:22:52,786 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-27 20:22:52,786 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:22:52,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:22:52,786 INFO L82 PathProgramCache]: Analyzing trace with hash -1404159886, now seen corresponding path program 34 times [2020-10-27 20:22:52,787 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:22:52,787 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [737756209] [2020-10-27 20:22:52,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:22:52,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:22:52,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:53,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:54,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:54,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:54,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:54,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:54,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:55,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:55,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:55,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:55,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:55,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:56,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:56,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:56,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:56,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:56,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:57,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:57,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:57,844 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:22:57,844 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 250 [2020-10-27 20:22:57,844 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 19 [2020-10-27 20:22:57,844 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-10-27 20:22:57,845 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:22:57,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 56 [2020-10-27 20:22:57,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 77 [2020-10-27 20:22:57,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 163 [2020-10-27 20:22:57,845 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:22:58,524 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:22:58,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:22:58,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:22:58,530 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:22:58,530 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:22:58,530 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:22:58,530 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:22:58,530 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:22:58,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:22:58,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:22:58,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:22:58,531 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:22:58,572 INFO L134 CoverageAnalysis]: Checked inductivity of 8550 backedges. 5698 proven. 2081 refuted. 0 times theorem prover too weak. 771 trivial. 0 not checked. [2020-10-27 20:22:58,572 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [737756209] [2020-10-27 20:22:58,573 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:22:58,573 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-27 20:22:58,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819389784] [2020-10-27 20:22:58,574 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-27 20:22:58,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:22:58,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-27 20:22:58,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-27 20:22:58,575 INFO L87 Difference]: Start difference. First operand 241 states and 268 transitions. Second operand 31 states. [2020-10-27 20:22:59,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:22:59,968 INFO L93 Difference]: Finished difference Result 330 states and 384 transitions. [2020-10-27 20:22:59,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-27 20:22:59,968 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 240 [2020-10-27 20:22:59,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:22:59,970 INFO L225 Difference]: With dead ends: 330 [2020-10-27 20:22:59,970 INFO L226 Difference]: Without dead ends: 323 [2020-10-27 20:22:59,971 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1305, Invalid=2117, Unknown=0, NotChecked=0, Total=3422 [2020-10-27 20:22:59,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2020-10-27 20:23:00,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 244. [2020-10-27 20:23:00,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 244 states. [2020-10-27 20:23:00,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 272 transitions. [2020-10-27 20:23:00,043 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 272 transitions. Word has length 240 [2020-10-27 20:23:00,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:23:00,043 INFO L481 AbstractCegarLoop]: Abstraction has 244 states and 272 transitions. [2020-10-27 20:23:00,044 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-27 20:23:00,044 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 272 transitions. [2020-10-27 20:23:00,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2020-10-27 20:23:00,045 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:23:00,045 INFO L422 BasicCegarLoop]: trace histogram [77, 76, 49, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:23:00,045 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-27 20:23:00,046 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:23:00,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:23:00,046 INFO L82 PathProgramCache]: Analyzing trace with hash -1052046574, now seen corresponding path program 35 times [2020-10-27 20:23:00,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:23:00,046 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1450897841] [2020-10-27 20:23:00,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:23:00,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:23:00,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:01,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:02,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:02,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:02,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:02,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:02,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:02,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:02,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:02,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:03,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:03,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:05,083 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:23:05,083 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 253 [2020-10-27 20:23:05,083 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-27 20:23:05,084 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-27 20:23:05,084 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:23:05,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 58 [2020-10-27 20:23:05,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 74 [2020-10-27 20:23:05,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 169 [2020-10-27 20:23:05,084 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:23:05,795 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:23:05,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:23:05,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:05,799 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:23:05,800 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:23:05,800 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:23:05,800 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 20:23:05,800 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:23:05,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:23:05,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:23:05,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:23:05,800 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:23:05,855 INFO L134 CoverageAnalysis]: Checked inductivity of 8778 backedges. 5825 proven. 2242 refuted. 0 times theorem prover too weak. 711 trivial. 0 not checked. [2020-10-27 20:23:05,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1450897841] [2020-10-27 20:23:05,855 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:23:05,856 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-27 20:23:05,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871876513] [2020-10-27 20:23:05,856 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-27 20:23:05,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:23:05,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-27 20:23:05,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-27 20:23:05,857 INFO L87 Difference]: Start difference. First operand 244 states and 272 transitions. Second operand 32 states. [2020-10-27 20:23:07,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:23:07,338 INFO L93 Difference]: Finished difference Result 336 states and 392 transitions. [2020-10-27 20:23:07,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-27 20:23:07,338 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 243 [2020-10-27 20:23:07,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:23:07,340 INFO L225 Difference]: With dead ends: 336 [2020-10-27 20:23:07,340 INFO L226 Difference]: Without dead ends: 329 [2020-10-27 20:23:07,341 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1395, Invalid=2265, Unknown=0, NotChecked=0, Total=3660 [2020-10-27 20:23:07,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2020-10-27 20:23:07,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 247. [2020-10-27 20:23:07,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 247 states. [2020-10-27 20:23:07,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 276 transitions. [2020-10-27 20:23:07,396 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 276 transitions. Word has length 243 [2020-10-27 20:23:07,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:23:07,397 INFO L481 AbstractCegarLoop]: Abstraction has 247 states and 276 transitions. [2020-10-27 20:23:07,397 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-27 20:23:07,397 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 276 transitions. [2020-10-27 20:23:07,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2020-10-27 20:23:07,398 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:23:07,399 INFO L422 BasicCegarLoop]: trace histogram [78, 77, 49, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:23:07,399 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-27 20:23:07,399 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:23:07,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:23:07,399 INFO L82 PathProgramCache]: Analyzing trace with hash 445494386, now seen corresponding path program 36 times [2020-10-27 20:23:07,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:23:07,400 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1232774706] [2020-10-27 20:23:07,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:23:07,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:23:07,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:08,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:09,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:09,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:09,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:09,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:09,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:09,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:12,437 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:23:12,438 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 256 [2020-10-27 20:23:12,438 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 20:23:12,438 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-27 20:23:12,438 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:23:12,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 60 [2020-10-27 20:23:12,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 71 [2020-10-27 20:23:12,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 175 [2020-10-27 20:23:12,438 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:23:13,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:23:13,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:23:13,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:13,247 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:23:13,248 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:23:13,248 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:23:13,248 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:23:13,248 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:23:13,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:23:13,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:23:13,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:23:13,248 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:23:13,289 INFO L134 CoverageAnalysis]: Checked inductivity of 9009 backedges. 5946 proven. 2409 refuted. 0 times theorem prover too weak. 654 trivial. 0 not checked. [2020-10-27 20:23:13,289 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1232774706] [2020-10-27 20:23:13,289 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:23:13,290 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-27 20:23:13,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116010433] [2020-10-27 20:23:13,290 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-27 20:23:13,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:23:13,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-27 20:23:13,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-27 20:23:13,291 INFO L87 Difference]: Start difference. First operand 247 states and 276 transitions. Second operand 33 states. [2020-10-27 20:23:14,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:23:14,966 INFO L93 Difference]: Finished difference Result 342 states and 400 transitions. [2020-10-27 20:23:14,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-27 20:23:14,967 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 246 [2020-10-27 20:23:14,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:23:14,968 INFO L225 Difference]: With dead ends: 342 [2020-10-27 20:23:14,968 INFO L226 Difference]: Without dead ends: 335 [2020-10-27 20:23:14,969 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1488, Invalid=2418, Unknown=0, NotChecked=0, Total=3906 [2020-10-27 20:23:14,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2020-10-27 20:23:15,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 250. [2020-10-27 20:23:15,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 250 states. [2020-10-27 20:23:15,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 280 transitions. [2020-10-27 20:23:15,051 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 280 transitions. Word has length 246 [2020-10-27 20:23:15,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:23:15,051 INFO L481 AbstractCegarLoop]: Abstraction has 250 states and 280 transitions. [2020-10-27 20:23:15,051 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-27 20:23:15,051 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 280 transitions. [2020-10-27 20:23:15,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2020-10-27 20:23:15,053 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:23:15,053 INFO L422 BasicCegarLoop]: trace histogram [79, 78, 49, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:23:15,053 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-27 20:23:15,053 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:23:15,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:23:15,054 INFO L82 PathProgramCache]: Analyzing trace with hash 1862930194, now seen corresponding path program 37 times [2020-10-27 20:23:15,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:23:15,054 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2029863812] [2020-10-27 20:23:15,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:23:15,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:23:15,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:16,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:16,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:17,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:17,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:17,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:17,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:17,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:18,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:20,097 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:23:20,097 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 259 [2020-10-27 20:23:20,097 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-27 20:23:20,098 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-27 20:23:20,098 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:23:20,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 62 [2020-10-27 20:23:20,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 68 [2020-10-27 20:23:20,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 181 [2020-10-27 20:23:20,098 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:23:20,943 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:23:20,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:23:20,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:20,948 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:23:20,948 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:23:20,948 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:23:20,948 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:23:20,948 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:23:20,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:23:20,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:23:20,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:23:20,949 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:23:20,991 INFO L134 CoverageAnalysis]: Checked inductivity of 9243 backedges. 6061 proven. 2582 refuted. 0 times theorem prover too weak. 600 trivial. 0 not checked. [2020-10-27 20:23:20,991 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2029863812] [2020-10-27 20:23:20,991 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:23:20,991 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-27 20:23:20,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289952247] [2020-10-27 20:23:20,992 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-27 20:23:20,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:23:20,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-27 20:23:20,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-27 20:23:20,992 INFO L87 Difference]: Start difference. First operand 250 states and 280 transitions. Second operand 34 states. [2020-10-27 20:23:22,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:23:22,683 INFO L93 Difference]: Finished difference Result 348 states and 408 transitions. [2020-10-27 20:23:22,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-27 20:23:22,684 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 249 [2020-10-27 20:23:22,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:23:22,686 INFO L225 Difference]: With dead ends: 348 [2020-10-27 20:23:22,686 INFO L226 Difference]: Without dead ends: 341 [2020-10-27 20:23:22,687 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1584, Invalid=2576, Unknown=0, NotChecked=0, Total=4160 [2020-10-27 20:23:22,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2020-10-27 20:23:22,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 253. [2020-10-27 20:23:22,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 253 states. [2020-10-27 20:23:22,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 284 transitions. [2020-10-27 20:23:22,779 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 284 transitions. Word has length 249 [2020-10-27 20:23:22,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:23:22,779 INFO L481 AbstractCegarLoop]: Abstraction has 253 states and 284 transitions. [2020-10-27 20:23:22,779 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-27 20:23:22,779 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 284 transitions. [2020-10-27 20:23:22,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2020-10-27 20:23:22,781 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:23:22,781 INFO L422 BasicCegarLoop]: trace histogram [80, 79, 49, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:23:22,781 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-27 20:23:22,781 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:23:22,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:23:22,782 INFO L82 PathProgramCache]: Analyzing trace with hash 574632050, now seen corresponding path program 38 times [2020-10-27 20:23:22,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:23:22,782 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1683282338] [2020-10-27 20:23:22,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:23:22,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:23:22,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:23,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:25,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:25,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:25,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:25,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:25,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:25,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:25,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:25,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:25,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:25,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:25,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:25,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:25,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:25,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:26,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:26,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:26,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:27,829 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:23:27,830 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 262 [2020-10-27 20:23:27,830 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 19 [2020-10-27 20:23:27,830 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-27 20:23:27,830 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:23:27,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 64 [2020-10-27 20:23:27,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 65 [2020-10-27 20:23:27,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 187 [2020-10-27 20:23:27,830 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:23:28,715 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:23:28,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:23:28,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:28,721 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:23:28,721 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:23:28,721 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:23:28,721 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:23:28,722 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:23:28,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:23:28,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:23:28,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:23:28,722 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:23:28,765 INFO L134 CoverageAnalysis]: Checked inductivity of 9480 backedges. 6170 proven. 2761 refuted. 0 times theorem prover too weak. 549 trivial. 0 not checked. [2020-10-27 20:23:28,766 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1683282338] [2020-10-27 20:23:28,766 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:23:28,766 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-27 20:23:28,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804501958] [2020-10-27 20:23:28,766 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-27 20:23:28,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:23:28,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-27 20:23:28,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-27 20:23:28,767 INFO L87 Difference]: Start difference. First operand 253 states and 284 transitions. Second operand 35 states. [2020-10-27 20:23:30,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:23:30,576 INFO L93 Difference]: Finished difference Result 354 states and 416 transitions. [2020-10-27 20:23:30,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-27 20:23:30,577 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 252 [2020-10-27 20:23:30,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:23:30,578 INFO L225 Difference]: With dead ends: 354 [2020-10-27 20:23:30,578 INFO L226 Difference]: Without dead ends: 347 [2020-10-27 20:23:30,579 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 496 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1683, Invalid=2739, Unknown=0, NotChecked=0, Total=4422 [2020-10-27 20:23:30,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2020-10-27 20:23:30,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 256. [2020-10-27 20:23:30,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256 states. [2020-10-27 20:23:30,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 288 transitions. [2020-10-27 20:23:30,691 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 288 transitions. Word has length 252 [2020-10-27 20:23:30,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:23:30,691 INFO L481 AbstractCegarLoop]: Abstraction has 256 states and 288 transitions. [2020-10-27 20:23:30,691 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-27 20:23:30,691 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 288 transitions. [2020-10-27 20:23:30,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2020-10-27 20:23:30,693 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:23:30,693 INFO L422 BasicCegarLoop]: trace histogram [81, 80, 49, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:23:30,694 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-27 20:23:30,694 INFO L429 AbstractCegarLoop]: === Iteration 42 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:23:30,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:23:30,694 INFO L82 PathProgramCache]: Analyzing trace with hash 712381202, now seen corresponding path program 39 times [2020-10-27 20:23:30,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:23:30,695 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1758139087] [2020-10-27 20:23:30,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:23:30,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:23:30,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:31,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:32,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:33,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:33,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:33,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:33,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:33,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:33,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:33,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:35,741 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:23:35,742 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 265 [2020-10-27 20:23:35,742 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-27 20:23:35,742 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-27 20:23:35,742 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:23:35,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 66 [2020-10-27 20:23:35,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 62 [2020-10-27 20:23:35,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 193 [2020-10-27 20:23:35,742 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:23:36,704 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:23:36,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:23:36,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:36,710 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:23:36,710 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:23:36,710 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:23:36,710 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:23:36,710 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:23:36,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:23:36,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:23:36,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:23:36,711 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:23:36,766 INFO L134 CoverageAnalysis]: Checked inductivity of 9720 backedges. 6273 proven. 2946 refuted. 0 times theorem prover too weak. 501 trivial. 0 not checked. [2020-10-27 20:23:36,766 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1758139087] [2020-10-27 20:23:36,766 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:23:36,766 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-27 20:23:36,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208872068] [2020-10-27 20:23:36,767 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-27 20:23:36,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:23:36,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-27 20:23:36,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-27 20:23:36,768 INFO L87 Difference]: Start difference. First operand 256 states and 288 transitions. Second operand 36 states. [2020-10-27 20:23:38,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:23:38,614 INFO L93 Difference]: Finished difference Result 360 states and 424 transitions. [2020-10-27 20:23:38,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-27 20:23:38,614 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 255 [2020-10-27 20:23:38,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:23:38,616 INFO L225 Difference]: With dead ends: 360 [2020-10-27 20:23:38,616 INFO L226 Difference]: Without dead ends: 353 [2020-10-27 20:23:38,616 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 528 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1785, Invalid=2907, Unknown=0, NotChecked=0, Total=4692 [2020-10-27 20:23:38,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2020-10-27 20:23:38,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 259. [2020-10-27 20:23:38,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 259 states. [2020-10-27 20:23:38,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 292 transitions. [2020-10-27 20:23:38,706 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 292 transitions. Word has length 255 [2020-10-27 20:23:38,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:23:38,707 INFO L481 AbstractCegarLoop]: Abstraction has 259 states and 292 transitions. [2020-10-27 20:23:38,707 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-27 20:23:38,707 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 292 transitions. [2020-10-27 20:23:38,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2020-10-27 20:23:38,708 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:23:38,709 INFO L422 BasicCegarLoop]: trace histogram [82, 81, 49, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:23:38,709 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-27 20:23:38,709 INFO L429 AbstractCegarLoop]: === Iteration 43 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:23:38,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:23:38,710 INFO L82 PathProgramCache]: Analyzing trace with hash -1591366542, now seen corresponding path program 40 times [2020-10-27 20:23:38,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:23:38,710 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1427963300] [2020-10-27 20:23:38,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:23:38,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:23:38,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:39,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:41,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:41,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:41,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:41,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:41,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:43,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:43,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:43,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:43,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:43,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:43,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:43,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:43,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:43,785 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:23:43,785 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 268 [2020-10-27 20:23:43,786 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-27 20:23:43,786 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5039 [2020-10-27 20:23:43,786 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:23:43,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 68 [2020-10-27 20:23:43,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 59 [2020-10-27 20:23:43,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 199 [2020-10-27 20:23:43,786 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:23:44,759 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:23:44,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:23:44,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:44,763 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:23:44,763 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:23:44,763 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:23:44,763 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 20:23:44,763 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:23:44,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:23:44,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:23:44,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:23:44,764 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:23:44,809 INFO L134 CoverageAnalysis]: Checked inductivity of 9963 backedges. 6370 proven. 3137 refuted. 0 times theorem prover too weak. 456 trivial. 0 not checked. [2020-10-27 20:23:44,809 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1427963300] [2020-10-27 20:23:44,809 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:23:44,809 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-27 20:23:44,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068040071] [2020-10-27 20:23:44,810 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-27 20:23:44,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:23:44,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-27 20:23:44,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-27 20:23:44,811 INFO L87 Difference]: Start difference. First operand 259 states and 292 transitions. Second operand 37 states. [2020-10-27 20:23:46,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:23:46,764 INFO L93 Difference]: Finished difference Result 366 states and 432 transitions. [2020-10-27 20:23:46,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-27 20:23:46,764 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 258 [2020-10-27 20:23:46,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:23:46,766 INFO L225 Difference]: With dead ends: 366 [2020-10-27 20:23:46,767 INFO L226 Difference]: Without dead ends: 359 [2020-10-27 20:23:46,767 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 561 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1890, Invalid=3080, Unknown=0, NotChecked=0, Total=4970 [2020-10-27 20:23:46,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2020-10-27 20:23:46,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 262. [2020-10-27 20:23:46,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 262 states. [2020-10-27 20:23:46,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 296 transitions. [2020-10-27 20:23:46,875 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 296 transitions. Word has length 258 [2020-10-27 20:23:46,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:23:46,875 INFO L481 AbstractCegarLoop]: Abstraction has 262 states and 296 transitions. [2020-10-27 20:23:46,875 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-27 20:23:46,875 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 296 transitions. [2020-10-27 20:23:46,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2020-10-27 20:23:46,877 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:23:46,877 INFO L422 BasicCegarLoop]: trace histogram [83, 82, 49, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:23:46,877 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-27 20:23:46,877 INFO L429 AbstractCegarLoop]: === Iteration 44 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:23:46,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:23:46,878 INFO L82 PathProgramCache]: Analyzing trace with hash 1036982034, now seen corresponding path program 41 times [2020-10-27 20:23:46,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:23:46,878 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2050008374] [2020-10-27 20:23:46,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:23:46,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:23:46,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking...