/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/float-benchs/zonotope_3.c.v+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 19:40:52,156 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 19:40:52,159 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 19:40:52,205 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 19:40:52,206 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 19:40:52,208 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 19:40:52,209 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 19:40:52,212 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 19:40:52,214 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 19:40:52,215 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 19:40:52,217 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 19:40:52,218 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 19:40:52,219 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 19:40:52,220 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 19:40:52,221 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 19:40:52,223 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 19:40:52,224 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 19:40:52,225 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 19:40:52,227 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 19:40:52,229 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 19:40:52,231 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 19:40:52,236 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 19:40:52,237 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 19:40:52,238 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 19:40:52,252 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 19:40:52,253 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 19:40:52,253 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 19:40:52,254 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 19:40:52,255 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 19:40:52,256 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 19:40:52,256 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 19:40:52,258 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 19:40:52,259 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 19:40:52,260 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 19:40:52,261 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 19:40:52,261 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 19:40:52,262 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 19:40:52,263 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 19:40:52,263 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 19:40:52,264 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 19:40:52,265 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 19:40:52,266 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 19:40:52,297 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 19:40:52,298 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 19:40:52,302 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 19:40:52,303 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 19:40:52,304 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 19:40:52,304 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 19:40:52,304 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 19:40:52,305 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 19:40:52,305 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 19:40:52,305 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 19:40:52,306 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 19:40:52,307 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 19:40:52,307 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 19:40:52,307 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 19:40:52,307 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 19:40:52,308 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 19:40:52,308 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 19:40:52,308 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 19:40:52,309 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 19:40:52,309 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 19:40:52,309 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 19:40:52,309 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 19:40:52,310 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 19:40:52,310 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 19:40:52,310 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 19:40:52,311 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 19:40:52,311 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 19:40:52,311 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 19:40:52,312 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 19:40:52,312 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 19:40:52,800 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 19:40:52,835 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 19:40:52,839 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 19:40:52,841 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 19:40:52,841 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 19:40:52,842 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-benchs/zonotope_3.c.v+lhb-reducer.c [2020-10-27 19:40:52,934 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/664ecb53c/3f1ca34e6ed2490fae5e54eb02040302/FLAG224aface4 [2020-10-27 19:40:53,700 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 19:40:53,701 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/float-benchs/zonotope_3.c.v+lhb-reducer.c [2020-10-27 19:40:53,712 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/664ecb53c/3f1ca34e6ed2490fae5e54eb02040302/FLAG224aface4 [2020-10-27 19:40:54,046 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/664ecb53c/3f1ca34e6ed2490fae5e54eb02040302 [2020-10-27 19:40:54,049 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 19:40:54,056 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 19:40:54,058 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 19:40:54,058 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 19:40:54,066 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 19:40:54,066 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 07:40:54" (1/1) ... [2020-10-27 19:40:54,071 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@9cf4b5f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:40:54, skipping insertion in model container [2020-10-27 19:40:54,071 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 07:40:54" (1/1) ... [2020-10-27 19:40:54,079 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 19:40:54,154 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 19:40:54,424 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 19:40:54,437 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 19:40:54,542 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 19:40:54,567 INFO L208 MainTranslator]: Completed translation [2020-10-27 19:40:54,568 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:40:54 WrapperNode [2020-10-27 19:40:54,568 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 19:40:54,569 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 19:40:54,570 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 19:40:54,570 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 19:40:54,583 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:40:54" (1/1) ... [2020-10-27 19:40:54,583 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:40:54" (1/1) ... [2020-10-27 19:40:54,596 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:40:54" (1/1) ... [2020-10-27 19:40:54,597 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:40:54" (1/1) ... [2020-10-27 19:40:54,617 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:40:54" (1/1) ... [2020-10-27 19:40:54,629 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:40:54" (1/1) ... [2020-10-27 19:40:54,636 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:40:54" (1/1) ... [2020-10-27 19:40:54,645 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 19:40:54,646 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 19:40:54,646 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 19:40:54,646 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 19:40:54,647 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:40:54" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 19:40:54,739 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 19:40:54,739 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 19:40:54,740 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 19:40:54,740 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-27 19:40:54,740 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 19:40:54,740 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 19:40:54,740 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 19:40:54,740 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 19:40:54,741 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 19:40:54,741 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_float [2020-10-27 19:40:54,741 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-27 19:40:54,741 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-27 19:40:54,741 INFO L130 BoogieDeclarations]: Found specification of procedure f [2020-10-27 19:40:54,741 INFO L130 BoogieDeclarations]: Found specification of procedure g [2020-10-27 19:40:54,741 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 19:40:54,742 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 19:40:54,742 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 19:40:54,742 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 19:40:54,742 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 19:40:54,742 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 19:40:54,756 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 19:40:55,410 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 19:40:55,410 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-27 19:40:55,412 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 07:40:55 BoogieIcfgContainer [2020-10-27 19:40:55,412 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 19:40:55,414 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 19:40:55,414 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 19:40:55,417 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 19:40:55,418 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 07:40:54" (1/3) ... [2020-10-27 19:40:55,419 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a280d7f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 07:40:55, skipping insertion in model container [2020-10-27 19:40:55,419 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:40:54" (2/3) ... [2020-10-27 19:40:55,419 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a280d7f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 07:40:55, skipping insertion in model container [2020-10-27 19:40:55,419 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 07:40:55" (3/3) ... [2020-10-27 19:40:55,421 INFO L111 eAbstractionObserver]: Analyzing ICFG zonotope_3.c.v+lhb-reducer.c [2020-10-27 19:40:55,434 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 19:40:55,440 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 19:40:55,454 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 19:40:55,484 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 19:40:55,484 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 19:40:55,484 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 19:40:55,484 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 19:40:55,485 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 19:40:55,485 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 19:40:55,485 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 19:40:55,485 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 19:40:55,505 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states. [2020-10-27 19:40:55,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-27 19:40:55,514 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:40:55,515 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:40:55,515 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:40:55,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:40:55,522 INFO L82 PathProgramCache]: Analyzing trace with hash -865449218, now seen corresponding path program 1 times [2020-10-27 19:40:55,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:40:55,532 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2121850607] [2020-10-27 19:40:55,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:40:55,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:40:55,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:40:56,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:40:58,625 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:40:58,625 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-27 19:40:58,625 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 19:40:58,626 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2806 [2020-10-27 19:40:58,628 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:40:58,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 19:40:58,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 51 [2020-10-27 19:40:58,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-27 19:40:58,629 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 19:40:59,073 WARN L193 SmtUtils]: Spent 288.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-27 19:40:59,077 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:40:59,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:40:59,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:40:59,110 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:40:59,110 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:40:59,111 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:40:59,111 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-27 19:40:59,111 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:40:59,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:40:59,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:40:59,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:40:59,112 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:40:59,134 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 19:40:59,135 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2121850607] [2020-10-27 19:40:59,137 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 19:40:59,137 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 19:40:59,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687605659] [2020-10-27 19:40:59,143 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 19:40:59,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:40:59,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 19:40:59,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 19:40:59,162 INFO L87 Difference]: Start difference. First operand 63 states. Second operand 5 states. [2020-10-27 19:40:59,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:40:59,632 INFO L93 Difference]: Finished difference Result 74 states and 117 transitions. [2020-10-27 19:40:59,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 19:40:59,634 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 50 [2020-10-27 19:40:59,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:40:59,645 INFO L225 Difference]: With dead ends: 74 [2020-10-27 19:40:59,645 INFO L226 Difference]: Without dead ends: 56 [2020-10-27 19:40:59,649 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 19:40:59,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-27 19:40:59,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2020-10-27 19:40:59,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-27 19:40:59,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 59 transitions. [2020-10-27 19:40:59,700 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 59 transitions. Word has length 50 [2020-10-27 19:40:59,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:40:59,701 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 59 transitions. [2020-10-27 19:40:59,701 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 19:40:59,701 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 59 transitions. [2020-10-27 19:40:59,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-27 19:40:59,703 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:40:59,703 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:40:59,704 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 19:40:59,704 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:40:59,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:40:59,705 INFO L82 PathProgramCache]: Analyzing trace with hash -397224071, now seen corresponding path program 1 times [2020-10-27 19:40:59,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:40:59,705 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [650358183] [2020-10-27 19:40:59,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:40:59,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:40:59,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:41:00,435 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:41:00,435 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-27 19:41:00,435 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:41:00,435 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 682 [2020-10-27 19:41:00,436 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:41:00,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 19:41:00,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:41:00,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-27 19:41:00,436 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:41:00,815 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-27 19:41:00,817 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:41:00,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:41:00,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:41:00,838 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:41:00,839 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:41:00,839 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:41:00,839 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-27 19:41:00,839 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:41:00,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:41:00,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:41:00,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:41:00,840 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:41:00,855 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 19:41:00,856 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [650358183] [2020-10-27 19:41:00,856 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 19:41:00,856 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2020-10-27 19:41:00,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506866623] [2020-10-27 19:41:00,858 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 19:41:00,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:41:00,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 19:41:00,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-27 19:41:00,860 INFO L87 Difference]: Start difference. First operand 56 states and 59 transitions. Second operand 13 states. [2020-10-27 19:41:01,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:41:01,126 INFO L93 Difference]: Finished difference Result 70 states and 76 transitions. [2020-10-27 19:41:01,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 19:41:01,127 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 50 [2020-10-27 19:41:01,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:41:01,129 INFO L225 Difference]: With dead ends: 70 [2020-10-27 19:41:01,129 INFO L226 Difference]: Without dead ends: 62 [2020-10-27 19:41:01,130 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-27 19:41:01,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-27 19:41:01,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 58. [2020-10-27 19:41:01,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-27 19:41:01,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 61 transitions. [2020-10-27 19:41:01,141 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 61 transitions. Word has length 50 [2020-10-27 19:41:01,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:41:01,142 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 61 transitions. [2020-10-27 19:41:01,142 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 19:41:01,142 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 61 transitions. [2020-10-27 19:41:01,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-27 19:41:01,144 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:41:01,144 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:41:01,144 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 19:41:01,145 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:41:01,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:41:01,145 INFO L82 PathProgramCache]: Analyzing trace with hash 883539006, now seen corresponding path program 1 times [2020-10-27 19:41:01,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:41:01,146 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [311988277] [2020-10-27 19:41:01,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:41:01,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:41:01,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:41:01,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:41:02,158 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:41:02,158 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-27 19:41:02,158 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 19:41:02,158 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 974 [2020-10-27 19:41:02,159 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:41:02,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 19:41:02,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 51 [2020-10-27 19:41:02,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 19:41:02,159 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:41:02,470 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-27 19:41:02,471 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:41:02,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:41:02,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:41:02,489 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:41:02,490 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:41:02,490 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:41:02,490 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 19:41:02,490 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:41:02,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:41:02,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:41:02,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:41:02,491 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:41:02,507 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:41:02,507 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [311988277] [2020-10-27 19:41:02,507 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 19:41:02,507 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 19:41:02,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905421917] [2020-10-27 19:41:02,508 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 19:41:02,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:41:02,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 19:41:02,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 19:41:02,509 INFO L87 Difference]: Start difference. First operand 58 states and 61 transitions. Second operand 4 states. [2020-10-27 19:41:02,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:41:02,676 INFO L93 Difference]: Finished difference Result 73 states and 79 transitions. [2020-10-27 19:41:02,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 19:41:02,677 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 55 [2020-10-27 19:41:02,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:41:02,679 INFO L225 Difference]: With dead ends: 73 [2020-10-27 19:41:02,679 INFO L226 Difference]: Without dead ends: 57 [2020-10-27 19:41:02,679 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 19:41:02,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-27 19:41:02,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-10-27 19:41:02,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-27 19:41:02,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2020-10-27 19:41:02,693 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 55 [2020-10-27 19:41:02,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:41:02,694 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2020-10-27 19:41:02,694 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 19:41:02,695 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2020-10-27 19:41:02,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-27 19:41:02,697 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:41:02,697 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:41:02,698 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 19:41:02,698 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:41:02,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:41:02,699 INFO L82 PathProgramCache]: Analyzing trace with hash 2039675801, now seen corresponding path program 1 times [2020-10-27 19:41:02,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:41:02,699 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [850977764] [2020-10-27 19:41:02,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:41:02,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:41:02,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:41:03,447 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:41:03,447 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-27 19:41:03,447 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:41:03,448 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 680 [2020-10-27 19:41:03,448 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:41:03,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 19:41:03,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:41:03,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-27 19:41:03,449 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:41:03,855 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-27 19:41:03,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:41:03,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:41:03,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:41:03,874 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:41:03,875 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:41:03,875 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:41:03,875 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 19:41:03,875 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:41:03,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:41:03,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:41:03,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:41:03,876 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:41:03,893 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:41:03,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [850977764] [2020-10-27 19:41:03,894 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:41:03,894 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 19:41:03,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041464966] [2020-10-27 19:41:03,895 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 19:41:03,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:41:03,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 19:41:03,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-27 19:41:03,896 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 14 states. [2020-10-27 19:41:04,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:41:04,161 INFO L93 Difference]: Finished difference Result 73 states and 75 transitions. [2020-10-27 19:41:04,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 19:41:04,162 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 55 [2020-10-27 19:41:04,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:41:04,163 INFO L225 Difference]: With dead ends: 73 [2020-10-27 19:41:04,163 INFO L226 Difference]: Without dead ends: 65 [2020-10-27 19:41:04,164 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-27 19:41:04,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-27 19:41:04,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 62. [2020-10-27 19:41:04,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-27 19:41:04,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 63 transitions. [2020-10-27 19:41:04,174 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 63 transitions. Word has length 55 [2020-10-27 19:41:04,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:41:04,174 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 63 transitions. [2020-10-27 19:41:04,174 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 19:41:04,174 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 63 transitions. [2020-10-27 19:41:04,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-27 19:41:04,175 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:41:04,176 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:41:04,176 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 19:41:04,176 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:41:04,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:41:04,177 INFO L82 PathProgramCache]: Analyzing trace with hash 1432644473, now seen corresponding path program 2 times [2020-10-27 19:41:04,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:41:04,177 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [878157861] [2020-10-27 19:41:04,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:41:04,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:41:04,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:41:04,858 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:41:04,858 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-27 19:41:04,858 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:41:04,858 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 644 [2020-10-27 19:41:04,858 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:41:04,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 19:41:04,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:41:04,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-27 19:41:04,859 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:41:05,226 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-27 19:41:05,228 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:41:05,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:41:05,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:41:05,243 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:41:05,243 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:41:05,244 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:41:05,244 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 19:41:05,244 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:41:05,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:41:05,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:41:05,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:41:05,245 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:41:05,261 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:41:05,261 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [878157861] [2020-10-27 19:41:05,261 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:41:05,262 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 19:41:05,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910939093] [2020-10-27 19:41:05,262 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 19:41:05,263 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:41:05,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 19:41:05,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-27 19:41:05,264 INFO L87 Difference]: Start difference. First operand 62 states and 63 transitions. Second operand 15 states. [2020-10-27 19:41:05,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:41:05,601 INFO L93 Difference]: Finished difference Result 78 states and 80 transitions. [2020-10-27 19:41:05,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 19:41:05,602 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 60 [2020-10-27 19:41:05,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:41:05,604 INFO L225 Difference]: With dead ends: 78 [2020-10-27 19:41:05,604 INFO L226 Difference]: Without dead ends: 70 [2020-10-27 19:41:05,605 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-27 19:41:05,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-27 19:41:05,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 67. [2020-10-27 19:41:05,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-27 19:41:05,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 68 transitions. [2020-10-27 19:41:05,615 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 68 transitions. Word has length 60 [2020-10-27 19:41:05,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:41:05,616 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 68 transitions. [2020-10-27 19:41:05,616 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 19:41:05,616 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 68 transitions. [2020-10-27 19:41:05,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-27 19:41:05,617 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:41:05,618 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:41:05,618 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 19:41:05,618 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:41:05,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:41:05,619 INFO L82 PathProgramCache]: Analyzing trace with hash 475916185, now seen corresponding path program 3 times [2020-10-27 19:41:05,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:41:05,619 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1037111154] [2020-10-27 19:41:05,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:41:05,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:41:05,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:41:06,356 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:41:06,357 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-27 19:41:06,357 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:41:06,357 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 699 [2020-10-27 19:41:06,357 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:41:06,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 19:41:06,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:41:06,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-27 19:41:06,358 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:41:06,796 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-27 19:41:06,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:41:06,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:41:06,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:41:06,816 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:41:06,816 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:41:06,816 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:41:06,817 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 19:41:06,817 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:41:06,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:41:06,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:41:06,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:41:06,818 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:41:06,835 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:41:06,835 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1037111154] [2020-10-27 19:41:06,838 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:41:06,838 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 19:41:06,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175065087] [2020-10-27 19:41:06,839 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 19:41:06,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:41:06,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 19:41:06,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-27 19:41:06,841 INFO L87 Difference]: Start difference. First operand 67 states and 68 transitions. Second operand 16 states. [2020-10-27 19:41:07,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:41:07,128 INFO L93 Difference]: Finished difference Result 83 states and 85 transitions. [2020-10-27 19:41:07,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 19:41:07,129 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 65 [2020-10-27 19:41:07,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:41:07,130 INFO L225 Difference]: With dead ends: 83 [2020-10-27 19:41:07,130 INFO L226 Difference]: Without dead ends: 75 [2020-10-27 19:41:07,131 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-27 19:41:07,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-27 19:41:07,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 72. [2020-10-27 19:41:07,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-27 19:41:07,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2020-10-27 19:41:07,150 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 65 [2020-10-27 19:41:07,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:41:07,150 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2020-10-27 19:41:07,150 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 19:41:07,150 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2020-10-27 19:41:07,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-27 19:41:07,151 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:41:07,152 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:41:07,152 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 19:41:07,152 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:41:07,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:41:07,153 INFO L82 PathProgramCache]: Analyzing trace with hash -1735590023, now seen corresponding path program 4 times [2020-10-27 19:41:07,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:41:07,153 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1639059027] [2020-10-27 19:41:07,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:41:07,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:41:07,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:41:07,895 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:41:07,895 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-27 19:41:07,895 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:41:07,896 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 709 [2020-10-27 19:41:07,896 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:41:07,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 19:41:07,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:41:07,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-27 19:41:07,897 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:41:08,322 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-27 19:41:08,323 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:41:08,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:41:08,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:41:08,344 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:41:08,344 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:41:08,345 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:41:08,345 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-27 19:41:08,345 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:41:08,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:41:08,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:41:08,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:41:08,346 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 19:41:08,369 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:41:08,370 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1639059027] [2020-10-27 19:41:08,370 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:41:08,370 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-27 19:41:08,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176678133] [2020-10-27 19:41:08,371 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-27 19:41:08,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:41:08,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-27 19:41:08,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-27 19:41:08,373 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand 17 states. [2020-10-27 19:41:08,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:41:08,681 INFO L93 Difference]: Finished difference Result 88 states and 90 transitions. [2020-10-27 19:41:08,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 19:41:08,681 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 70 [2020-10-27 19:41:08,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:41:08,683 INFO L225 Difference]: With dead ends: 88 [2020-10-27 19:41:08,683 INFO L226 Difference]: Without dead ends: 80 [2020-10-27 19:41:08,684 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-27 19:41:08,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-27 19:41:08,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 77. [2020-10-27 19:41:08,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-27 19:41:08,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 78 transitions. [2020-10-27 19:41:08,693 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 78 transitions. Word has length 70 [2020-10-27 19:41:08,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:41:08,693 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 78 transitions. [2020-10-27 19:41:08,694 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-27 19:41:08,694 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 78 transitions. [2020-10-27 19:41:08,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-27 19:41:08,695 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:41:08,695 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:41:08,695 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 19:41:08,695 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:41:08,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:41:08,696 INFO L82 PathProgramCache]: Analyzing trace with hash 527553433, now seen corresponding path program 5 times [2020-10-27 19:41:08,696 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:41:08,697 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1072841865] [2020-10-27 19:41:08,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:41:08,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:41:08,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:41:09,551 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:41:09,551 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-27 19:41:09,552 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:41:09,552 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 822 [2020-10-27 19:41:09,552 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:41:09,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-27 19:41:09,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:41:09,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-27 19:41:09,553 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:41:10,020 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-27 19:41:10,021 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:41:10,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:41:10,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:41:10,039 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:41:10,040 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:41:10,040 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:41:10,040 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-27 19:41:10,040 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:41:10,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:41:10,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:41:10,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:41:10,041 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:41:10,063 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:41:10,064 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1072841865] [2020-10-27 19:41:10,064 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:41:10,064 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-27 19:41:10,065 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109646423] [2020-10-27 19:41:10,065 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-27 19:41:10,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:41:10,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-27 19:41:10,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-27 19:41:10,067 INFO L87 Difference]: Start difference. First operand 77 states and 78 transitions. Second operand 18 states. [2020-10-27 19:41:10,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:41:10,320 INFO L93 Difference]: Finished difference Result 93 states and 95 transitions. [2020-10-27 19:41:10,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 19:41:10,321 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 75 [2020-10-27 19:41:10,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:41:10,322 INFO L225 Difference]: With dead ends: 93 [2020-10-27 19:41:10,322 INFO L226 Difference]: Without dead ends: 85 [2020-10-27 19:41:10,323 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-27 19:41:10,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-27 19:41:10,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 82. [2020-10-27 19:41:10,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-27 19:41:10,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 83 transitions. [2020-10-27 19:41:10,332 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 83 transitions. Word has length 75 [2020-10-27 19:41:10,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:41:10,332 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 83 transitions. [2020-10-27 19:41:10,332 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-27 19:41:10,332 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 83 transitions. [2020-10-27 19:41:10,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-27 19:41:10,334 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:41:10,334 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:41:10,334 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 19:41:10,334 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:41:10,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:41:10,335 INFO L82 PathProgramCache]: Analyzing trace with hash 1091343225, now seen corresponding path program 6 times [2020-10-27 19:41:10,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:41:10,335 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [379696325] [2020-10-27 19:41:10,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:41:10,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:41:10,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:41:11,205 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:41:11,205 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 19:41:11,205 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:41:11,205 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 833 [2020-10-27 19:41:11,206 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:41:11,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-27 19:41:11,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:41:11,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 69 [2020-10-27 19:41:11,206 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:41:11,650 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-27 19:41:11,651 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:41:11,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:41:11,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:41:11,669 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:41:11,669 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:41:11,669 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:41:11,670 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-27 19:41:11,670 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:41:11,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:41:11,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:41:11,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:41:11,670 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:41:11,692 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:41:11,692 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [379696325] [2020-10-27 19:41:11,693 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:41:11,693 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-27 19:41:11,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922970400] [2020-10-27 19:41:11,694 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-27 19:41:11,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:41:11,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-27 19:41:11,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-27 19:41:11,695 INFO L87 Difference]: Start difference. First operand 82 states and 83 transitions. Second operand 19 states. [2020-10-27 19:41:11,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:41:11,972 INFO L93 Difference]: Finished difference Result 98 states and 100 transitions. [2020-10-27 19:41:11,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 19:41:11,972 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 80 [2020-10-27 19:41:11,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:41:11,973 INFO L225 Difference]: With dead ends: 98 [2020-10-27 19:41:11,973 INFO L226 Difference]: Without dead ends: 90 [2020-10-27 19:41:11,974 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-27 19:41:11,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-27 19:41:11,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 87. [2020-10-27 19:41:11,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-27 19:41:11,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 88 transitions. [2020-10-27 19:41:11,983 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 88 transitions. Word has length 80 [2020-10-27 19:41:11,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:41:11,983 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 88 transitions. [2020-10-27 19:41:11,983 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-27 19:41:11,984 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 88 transitions. [2020-10-27 19:41:11,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-27 19:41:11,985 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:41:11,985 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:41:11,985 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 19:41:11,986 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:41:11,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:41:11,986 INFO L82 PathProgramCache]: Analyzing trace with hash 2072952729, now seen corresponding path program 7 times [2020-10-27 19:41:11,986 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:41:11,987 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1018077878] [2020-10-27 19:41:11,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:41:12,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:41:12,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:41:12,910 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:41:12,910 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-27 19:41:12,910 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:41:12,910 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 865 [2020-10-27 19:41:12,911 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:41:12,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-27 19:41:12,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:41:12,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-27 19:41:12,911 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:41:13,357 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-27 19:41:13,358 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:41:13,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:41:13,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:41:13,374 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:41:13,374 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:41:13,374 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:41:13,374 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 19:41:13,374 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:41:13,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:41:13,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:41:13,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:41:13,375 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:41:13,396 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 119 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:41:13,396 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1018077878] [2020-10-27 19:41:13,396 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:41:13,396 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-27 19:41:13,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771364225] [2020-10-27 19:41:13,397 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-27 19:41:13,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:41:13,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-27 19:41:13,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-27 19:41:13,399 INFO L87 Difference]: Start difference. First operand 87 states and 88 transitions. Second operand 20 states. [2020-10-27 19:41:13,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:41:13,669 INFO L93 Difference]: Finished difference Result 103 states and 105 transitions. [2020-10-27 19:41:13,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 19:41:13,669 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 85 [2020-10-27 19:41:13,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:41:13,670 INFO L225 Difference]: With dead ends: 103 [2020-10-27 19:41:13,670 INFO L226 Difference]: Without dead ends: 95 [2020-10-27 19:41:13,671 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-27 19:41:13,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-27 19:41:13,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 92. [2020-10-27 19:41:13,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-27 19:41:13,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 93 transitions. [2020-10-27 19:41:13,687 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 93 transitions. Word has length 85 [2020-10-27 19:41:13,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:41:13,688 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 93 transitions. [2020-10-27 19:41:13,688 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-27 19:41:13,688 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 93 transitions. [2020-10-27 19:41:13,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-10-27 19:41:13,691 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:41:13,691 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:41:13,691 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 19:41:13,692 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:41:13,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:41:13,692 INFO L82 PathProgramCache]: Analyzing trace with hash -836556935, now seen corresponding path program 8 times [2020-10-27 19:41:13,692 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:41:13,692 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [137315522] [2020-10-27 19:41:13,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:41:13,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:41:13,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:41:14,672 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:41:14,673 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 98 [2020-10-27 19:41:14,673 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:41:14,673 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 942 [2020-10-27 19:41:14,673 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:41:14,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-27 19:41:14,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:41:14,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 79 [2020-10-27 19:41:14,674 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:41:15,217 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-27 19:41:15,218 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:41:15,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:41:15,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:41:15,249 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:41:15,250 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:41:15,250 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:41:15,250 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-27 19:41:15,251 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:41:15,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:41:15,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:41:15,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:41:15,253 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 19:41:15,286 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:41:15,286 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [137315522] [2020-10-27 19:41:15,286 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:41:15,286 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-27 19:41:15,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103937084] [2020-10-27 19:41:15,287 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-27 19:41:15,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:41:15,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-27 19:41:15,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-27 19:41:15,289 INFO L87 Difference]: Start difference. First operand 92 states and 93 transitions. Second operand 21 states. [2020-10-27 19:41:15,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:41:15,589 INFO L93 Difference]: Finished difference Result 108 states and 110 transitions. [2020-10-27 19:41:15,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-27 19:41:15,589 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 90 [2020-10-27 19:41:15,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:41:15,590 INFO L225 Difference]: With dead ends: 108 [2020-10-27 19:41:15,590 INFO L226 Difference]: Without dead ends: 100 [2020-10-27 19:41:15,591 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-27 19:41:15,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-27 19:41:15,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 97. [2020-10-27 19:41:15,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-27 19:41:15,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 98 transitions. [2020-10-27 19:41:15,600 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 98 transitions. Word has length 90 [2020-10-27 19:41:15,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:41:15,600 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 98 transitions. [2020-10-27 19:41:15,600 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-27 19:41:15,601 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 98 transitions. [2020-10-27 19:41:15,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-10-27 19:41:15,602 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:41:15,602 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:41:15,602 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 19:41:15,602 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:41:15,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:41:15,604 INFO L82 PathProgramCache]: Analyzing trace with hash 963947417, now seen corresponding path program 9 times [2020-10-27 19:41:15,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:41:15,605 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1362475627] [2020-10-27 19:41:15,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:41:15,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:41:15,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:41:16,662 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:41:16,662 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-10-27 19:41:16,663 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:41:16,663 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1018 [2020-10-27 19:41:16,663 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:41:16,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-27 19:41:16,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:41:16,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 84 [2020-10-27 19:41:16,664 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:41:17,243 WARN L193 SmtUtils]: Spent 275.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-27 19:41:17,244 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:41:17,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:41:17,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:41:17,262 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:41:17,263 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:41:17,263 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:41:17,263 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 19:41:17,264 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:41:17,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:41:17,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:41:17,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:41:17,265 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 19:41:17,300 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 198 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:41:17,301 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1362475627] [2020-10-27 19:41:17,301 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:41:17,301 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-27 19:41:17,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406004449] [2020-10-27 19:41:17,302 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-27 19:41:17,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:41:17,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-27 19:41:17,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-27 19:41:17,304 INFO L87 Difference]: Start difference. First operand 97 states and 98 transitions. Second operand 22 states. [2020-10-27 19:41:17,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:41:17,589 INFO L93 Difference]: Finished difference Result 113 states and 115 transitions. [2020-10-27 19:41:17,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-27 19:41:17,590 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 95 [2020-10-27 19:41:17,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:41:17,591 INFO L225 Difference]: With dead ends: 113 [2020-10-27 19:41:17,591 INFO L226 Difference]: Without dead ends: 105 [2020-10-27 19:41:17,592 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-27 19:41:17,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-27 19:41:17,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 102. [2020-10-27 19:41:17,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-27 19:41:17,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 103 transitions. [2020-10-27 19:41:17,602 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 103 transitions. Word has length 95 [2020-10-27 19:41:17,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:41:17,603 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 103 transitions. [2020-10-27 19:41:17,603 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-27 19:41:17,603 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 103 transitions. [2020-10-27 19:41:17,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-10-27 19:41:17,607 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:41:17,608 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:41:17,608 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 19:41:17,608 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:41:17,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:41:17,609 INFO L82 PathProgramCache]: Analyzing trace with hash -1357857927, now seen corresponding path program 10 times [2020-10-27 19:41:17,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:41:17,609 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1509132433] [2020-10-27 19:41:17,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:41:17,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:41:17,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:41:18,583 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:41:18,583 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 108 [2020-10-27 19:41:18,584 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:41:18,584 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 933 [2020-10-27 19:41:18,584 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:41:18,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-27 19:41:18,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:41:18,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 89 [2020-10-27 19:41:18,585 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:41:19,162 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-27 19:41:19,165 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:41:19,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:41:19,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:41:19,180 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:41:19,180 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:41:19,181 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:41:19,181 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 19:41:19,181 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:41:19,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:41:19,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:41:19,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:41:19,182 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:41:19,209 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:41:19,209 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1509132433] [2020-10-27 19:41:19,209 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:41:19,210 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-27 19:41:19,210 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857313587] [2020-10-27 19:41:19,210 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-27 19:41:19,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:41:19,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-27 19:41:19,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-27 19:41:19,212 INFO L87 Difference]: Start difference. First operand 102 states and 103 transitions. Second operand 23 states. [2020-10-27 19:41:19,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:41:19,469 INFO L93 Difference]: Finished difference Result 118 states and 120 transitions. [2020-10-27 19:41:19,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-27 19:41:19,470 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 100 [2020-10-27 19:41:19,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:41:19,471 INFO L225 Difference]: With dead ends: 118 [2020-10-27 19:41:19,471 INFO L226 Difference]: Without dead ends: 110 [2020-10-27 19:41:19,472 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-27 19:41:19,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-10-27 19:41:19,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 107. [2020-10-27 19:41:19,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-10-27 19:41:19,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 108 transitions. [2020-10-27 19:41:19,482 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 108 transitions. Word has length 100 [2020-10-27 19:41:19,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:41:19,482 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 108 transitions. [2020-10-27 19:41:19,482 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-27 19:41:19,483 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 108 transitions. [2020-10-27 19:41:19,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-10-27 19:41:19,484 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:41:19,484 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:41:19,484 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 19:41:19,484 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:41:19,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:41:19,485 INFO L82 PathProgramCache]: Analyzing trace with hash 1910740889, now seen corresponding path program 11 times [2020-10-27 19:41:19,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:41:19,487 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [102490252] [2020-10-27 19:41:19,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:41:19,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:41:19,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:41:20,653 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:41:20,653 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 113 [2020-10-27 19:41:20,654 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:41:20,654 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1124 [2020-10-27 19:41:20,654 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:41:20,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-27 19:41:20,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:41:20,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 94 [2020-10-27 19:41:20,654 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:41:21,192 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-27 19:41:21,193 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:41:21,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:41:21,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:41:21,211 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:41:21,212 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:41:21,212 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:41:21,212 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 19:41:21,212 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:41:21,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:41:21,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:41:21,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:41:21,213 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:41:21,244 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 0 proven. 297 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:41:21,245 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [102490252] [2020-10-27 19:41:21,245 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:41:21,245 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-27 19:41:21,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087091892] [2020-10-27 19:41:21,246 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-27 19:41:21,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:41:21,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-27 19:41:21,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-27 19:41:21,248 INFO L87 Difference]: Start difference. First operand 107 states and 108 transitions. Second operand 24 states. [2020-10-27 19:41:21,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:41:21,571 INFO L93 Difference]: Finished difference Result 123 states and 125 transitions. [2020-10-27 19:41:21,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-27 19:41:21,571 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 105 [2020-10-27 19:41:21,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:41:21,573 INFO L225 Difference]: With dead ends: 123 [2020-10-27 19:41:21,573 INFO L226 Difference]: Without dead ends: 115 [2020-10-27 19:41:21,574 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-27 19:41:21,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-27 19:41:21,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 112. [2020-10-27 19:41:21,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-10-27 19:41:21,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 113 transitions. [2020-10-27 19:41:21,587 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 113 transitions. Word has length 105 [2020-10-27 19:41:21,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:41:21,588 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 113 transitions. [2020-10-27 19:41:21,588 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-27 19:41:21,588 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 113 transitions. [2020-10-27 19:41:21,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-10-27 19:41:21,591 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:41:21,591 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:41:21,591 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 19:41:21,591 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:41:21,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:41:21,592 INFO L82 PathProgramCache]: Analyzing trace with hash 1125470073, now seen corresponding path program 12 times [2020-10-27 19:41:21,592 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:41:21,592 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [947160271] [2020-10-27 19:41:21,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:41:21,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:41:21,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:41:22,531 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:41:22,531 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 118 [2020-10-27 19:41:22,531 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:41:22,531 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 896 [2020-10-27 19:41:22,532 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:41:22,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-27 19:41:22,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:41:22,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 99 [2020-10-27 19:41:22,532 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:41:23,148 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-27 19:41:23,150 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:41:23,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:41:23,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:41:23,163 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:41:23,163 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:41:23,164 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:41:23,164 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 19:41:23,164 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:41:23,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:41:23,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:41:23,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:41:23,165 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:41:23,193 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:41:23,193 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [947160271] [2020-10-27 19:41:23,193 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:41:23,194 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-27 19:41:23,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341528718] [2020-10-27 19:41:23,194 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-27 19:41:23,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:41:23,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-27 19:41:23,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-27 19:41:23,196 INFO L87 Difference]: Start difference. First operand 112 states and 113 transitions. Second operand 25 states. [2020-10-27 19:41:23,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:41:23,483 INFO L93 Difference]: Finished difference Result 128 states and 130 transitions. [2020-10-27 19:41:23,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-27 19:41:23,484 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 110 [2020-10-27 19:41:23,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:41:23,485 INFO L225 Difference]: With dead ends: 128 [2020-10-27 19:41:23,486 INFO L226 Difference]: Without dead ends: 120 [2020-10-27 19:41:23,486 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-27 19:41:23,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-27 19:41:23,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 117. [2020-10-27 19:41:23,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-10-27 19:41:23,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 118 transitions. [2020-10-27 19:41:23,500 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 118 transitions. Word has length 110 [2020-10-27 19:41:23,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:41:23,501 INFO L481 AbstractCegarLoop]: Abstraction has 117 states and 118 transitions. [2020-10-27 19:41:23,502 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-27 19:41:23,502 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 118 transitions. [2020-10-27 19:41:23,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-10-27 19:41:23,503 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:41:23,503 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:41:23,504 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 19:41:23,504 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:41:23,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:41:23,504 INFO L82 PathProgramCache]: Analyzing trace with hash 1302037401, now seen corresponding path program 13 times [2020-10-27 19:41:23,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:41:23,505 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [317075769] [2020-10-27 19:41:23,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:41:23,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:41:23,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:41:24,427 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:41:24,427 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 123 [2020-10-27 19:41:24,428 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:41:24,428 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 884 [2020-10-27 19:41:24,428 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:41:24,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-27 19:41:24,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:41:24,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 104 [2020-10-27 19:41:24,428 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:41:25,059 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-27 19:41:25,060 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:41:25,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:41:25,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:41:25,078 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:41:25,078 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:41:25,079 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:41:25,079 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 19:41:25,079 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:41:25,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:41:25,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:41:25,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:41:25,080 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:41:25,113 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 0 proven. 416 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:41:25,114 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [317075769] [2020-10-27 19:41:25,117 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:41:25,117 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-27 19:41:25,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777843440] [2020-10-27 19:41:25,118 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-27 19:41:25,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:41:25,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-27 19:41:25,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-27 19:41:25,119 INFO L87 Difference]: Start difference. First operand 117 states and 118 transitions. Second operand 26 states. [2020-10-27 19:41:25,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:41:25,400 INFO L93 Difference]: Finished difference Result 133 states and 135 transitions. [2020-10-27 19:41:25,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-27 19:41:25,402 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 115 [2020-10-27 19:41:25,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:41:25,403 INFO L225 Difference]: With dead ends: 133 [2020-10-27 19:41:25,403 INFO L226 Difference]: Without dead ends: 125 [2020-10-27 19:41:25,404 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-27 19:41:25,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-27 19:41:25,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 122. [2020-10-27 19:41:25,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-10-27 19:41:25,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 123 transitions. [2020-10-27 19:41:25,412 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 123 transitions. Word has length 115 [2020-10-27 19:41:25,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:41:25,412 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 123 transitions. [2020-10-27 19:41:25,412 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-27 19:41:25,412 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 123 transitions. [2020-10-27 19:41:25,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2020-10-27 19:41:25,414 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:41:25,414 INFO L422 BasicCegarLoop]: trace histogram [15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:41:25,414 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-27 19:41:25,414 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:41:25,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:41:25,415 INFO L82 PathProgramCache]: Analyzing trace with hash -646913159, now seen corresponding path program 14 times [2020-10-27 19:41:25,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:41:25,416 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [911622259] [2020-10-27 19:41:25,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:41:25,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:41:25,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:41:26,421 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:41:26,422 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 128 [2020-10-27 19:41:26,422 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:41:26,422 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 964 [2020-10-27 19:41:26,422 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:41:26,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-27 19:41:26,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:41:26,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 109 [2020-10-27 19:41:26,423 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:41:27,185 WARN L193 SmtUtils]: Spent 245.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-27 19:41:27,186 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:41:27,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:41:27,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:41:27,201 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:41:27,202 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:41:27,202 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:41:27,202 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 19:41:27,202 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:41:27,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:41:27,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:41:27,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:41:27,202 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:41:27,244 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 0 proven. 483 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:41:27,244 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [911622259] [2020-10-27 19:41:27,245 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:41:27,245 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-27 19:41:27,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818705314] [2020-10-27 19:41:27,246 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-27 19:41:27,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:41:27,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-27 19:41:27,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-27 19:41:27,247 INFO L87 Difference]: Start difference. First operand 122 states and 123 transitions. Second operand 27 states. [2020-10-27 19:41:27,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:41:27,600 INFO L93 Difference]: Finished difference Result 138 states and 140 transitions. [2020-10-27 19:41:27,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-27 19:41:27,601 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 120 [2020-10-27 19:41:27,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:41:27,603 INFO L225 Difference]: With dead ends: 138 [2020-10-27 19:41:27,603 INFO L226 Difference]: Without dead ends: 130 [2020-10-27 19:41:27,604 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-27 19:41:27,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-10-27 19:41:27,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 127. [2020-10-27 19:41:27,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-10-27 19:41:27,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 128 transitions. [2020-10-27 19:41:27,612 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 128 transitions. Word has length 120 [2020-10-27 19:41:27,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:41:27,613 INFO L481 AbstractCegarLoop]: Abstraction has 127 states and 128 transitions. [2020-10-27 19:41:27,613 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-27 19:41:27,613 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 128 transitions. [2020-10-27 19:41:27,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-10-27 19:41:27,614 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:41:27,614 INFO L422 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:41:27,614 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-27 19:41:27,615 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:41:27,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:41:27,615 INFO L82 PathProgramCache]: Analyzing trace with hash 89943961, now seen corresponding path program 15 times [2020-10-27 19:41:27,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:41:27,616 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [993204788] [2020-10-27 19:41:27,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:41:27,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:41:27,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:41:28,718 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:41:28,718 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 133 [2020-10-27 19:41:28,719 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:41:28,719 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1061 [2020-10-27 19:41:28,719 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:41:28,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-27 19:41:28,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:41:28,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 114 [2020-10-27 19:41:28,720 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:41:29,437 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-27 19:41:29,440 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:41:29,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:41:29,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:41:29,456 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:41:29,457 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:41:29,457 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:41:29,457 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 19:41:29,457 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:41:29,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:41:29,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:41:29,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:41:29,458 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:41:29,482 INFO L134 CoverageAnalysis]: Checked inductivity of 555 backedges. 0 proven. 555 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:41:29,482 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [993204788] [2020-10-27 19:41:29,483 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:41:29,483 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-27 19:41:29,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735331617] [2020-10-27 19:41:29,483 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-27 19:41:29,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:41:29,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-27 19:41:29,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-27 19:41:29,485 INFO L87 Difference]: Start difference. First operand 127 states and 128 transitions. Second operand 28 states. [2020-10-27 19:41:29,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:41:29,844 INFO L93 Difference]: Finished difference Result 143 states and 145 transitions. [2020-10-27 19:41:29,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-27 19:41:29,844 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 125 [2020-10-27 19:41:29,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:41:29,846 INFO L225 Difference]: With dead ends: 143 [2020-10-27 19:41:29,846 INFO L226 Difference]: Without dead ends: 135 [2020-10-27 19:41:29,847 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-27 19:41:29,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-10-27 19:41:29,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 132. [2020-10-27 19:41:29,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-10-27 19:41:29,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 133 transitions. [2020-10-27 19:41:29,855 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 133 transitions. Word has length 125 [2020-10-27 19:41:29,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:41:29,855 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 133 transitions. [2020-10-27 19:41:29,855 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-27 19:41:29,855 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 133 transitions. [2020-10-27 19:41:29,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-10-27 19:41:29,857 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:41:29,857 INFO L422 BasicCegarLoop]: trace histogram [17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:41:29,857 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-27 19:41:29,857 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:41:29,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:41:29,858 INFO L82 PathProgramCache]: Analyzing trace with hash -1318881415, now seen corresponding path program 16 times [2020-10-27 19:41:29,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:41:29,859 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [185997860] [2020-10-27 19:41:29,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:41:29,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:41:29,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:41:31,066 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:41:31,067 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 138 [2020-10-27 19:41:31,067 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:41:31,067 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1165 [2020-10-27 19:41:31,067 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:41:31,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-27 19:41:31,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:41:31,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 119 [2020-10-27 19:41:31,067 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:41:31,839 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-27 19:41:31,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:41:31,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:41:31,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:41:31,856 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:41:31,856 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:41:31,856 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:41:31,856 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 19:41:31,856 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:41:31,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:41:31,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:41:31,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:41:31,857 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:41:31,890 INFO L134 CoverageAnalysis]: Checked inductivity of 632 backedges. 0 proven. 632 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:41:31,891 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [185997860] [2020-10-27 19:41:31,891 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:41:31,891 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-27 19:41:31,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888552369] [2020-10-27 19:41:31,892 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-27 19:41:31,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:41:31,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-27 19:41:31,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-27 19:41:31,893 INFO L87 Difference]: Start difference. First operand 132 states and 133 transitions. Second operand 29 states. [2020-10-27 19:41:32,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:41:32,184 INFO L93 Difference]: Finished difference Result 148 states and 150 transitions. [2020-10-27 19:41:32,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-27 19:41:32,185 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 130 [2020-10-27 19:41:32,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:41:32,187 INFO L225 Difference]: With dead ends: 148 [2020-10-27 19:41:32,187 INFO L226 Difference]: Without dead ends: 140 [2020-10-27 19:41:32,188 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-27 19:41:32,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-10-27 19:41:32,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 137. [2020-10-27 19:41:32,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-10-27 19:41:32,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 138 transitions. [2020-10-27 19:41:32,195 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 138 transitions. Word has length 130 [2020-10-27 19:41:32,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:41:32,196 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 138 transitions. [2020-10-27 19:41:32,196 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-27 19:41:32,196 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 138 transitions. [2020-10-27 19:41:32,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-10-27 19:41:32,197 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:41:32,198 INFO L422 BasicCegarLoop]: trace histogram [18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:41:32,198 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-27 19:41:32,198 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:41:32,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:41:32,198 INFO L82 PathProgramCache]: Analyzing trace with hash -504996967, now seen corresponding path program 17 times [2020-10-27 19:41:32,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:41:32,199 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2082558464] [2020-10-27 19:41:32,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:41:32,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:41:32,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:41:33,237 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:41:33,238 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 143 [2020-10-27 19:41:33,238 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:41:33,238 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 999 [2020-10-27 19:41:33,238 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:41:33,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-27 19:41:33,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:41:33,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 124 [2020-10-27 19:41:33,238 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:41:34,021 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-27 19:41:34,022 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:41:34,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:41:34,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:41:34,040 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:41:34,040 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:41:34,040 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:41:34,041 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 19:41:34,041 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:41:34,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:41:34,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:41:34,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:41:34,041 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:41:34,078 INFO L134 CoverageAnalysis]: Checked inductivity of 714 backedges. 0 proven. 714 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:41:34,079 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2082558464] [2020-10-27 19:41:34,079 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:41:34,079 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-27 19:41:34,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604761487] [2020-10-27 19:41:34,080 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-27 19:41:34,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:41:34,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-27 19:41:34,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-27 19:41:34,081 INFO L87 Difference]: Start difference. First operand 137 states and 138 transitions. Second operand 30 states. [2020-10-27 19:41:34,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:41:34,416 INFO L93 Difference]: Finished difference Result 153 states and 155 transitions. [2020-10-27 19:41:34,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-27 19:41:34,417 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 135 [2020-10-27 19:41:34,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:41:34,418 INFO L225 Difference]: With dead ends: 153 [2020-10-27 19:41:34,419 INFO L226 Difference]: Without dead ends: 145 [2020-10-27 19:41:34,420 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-27 19:41:34,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-10-27 19:41:34,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 142. [2020-10-27 19:41:34,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-27 19:41:34,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 143 transitions. [2020-10-27 19:41:34,426 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 143 transitions. Word has length 135 [2020-10-27 19:41:34,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:41:34,426 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 143 transitions. [2020-10-27 19:41:34,427 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-27 19:41:34,427 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 143 transitions. [2020-10-27 19:41:34,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2020-10-27 19:41:34,428 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:41:34,428 INFO L422 BasicCegarLoop]: trace histogram [19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:41:34,428 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-27 19:41:34,429 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:41:34,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:41:34,429 INFO L82 PathProgramCache]: Analyzing trace with hash -97711239, now seen corresponding path program 18 times [2020-10-27 19:41:34,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:41:34,430 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [658490033] [2020-10-27 19:41:34,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:41:34,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:41:34,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:41:35,778 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:41:35,778 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 148 [2020-10-27 19:41:35,778 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:41:35,778 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1302 [2020-10-27 19:41:35,778 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:41:35,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-27 19:41:35,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:41:35,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 129 [2020-10-27 19:41:35,779 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:41:36,604 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-27 19:41:36,605 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:41:36,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:41:36,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:41:36,624 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:41:36,624 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:41:36,624 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:41:36,624 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-27 19:41:36,624 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:41:36,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:41:36,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:41:36,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:41:36,625 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:41:36,661 INFO L134 CoverageAnalysis]: Checked inductivity of 801 backedges. 0 proven. 801 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:41:36,662 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [658490033] [2020-10-27 19:41:36,662 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:41:36,662 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-27 19:41:36,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39926693] [2020-10-27 19:41:36,663 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-27 19:41:36,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:41:36,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-27 19:41:36,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-27 19:41:36,664 INFO L87 Difference]: Start difference. First operand 142 states and 143 transitions. Second operand 31 states. [2020-10-27 19:41:37,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:41:37,027 INFO L93 Difference]: Finished difference Result 158 states and 160 transitions. [2020-10-27 19:41:37,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-27 19:41:37,028 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 140 [2020-10-27 19:41:37,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:41:37,030 INFO L225 Difference]: With dead ends: 158 [2020-10-27 19:41:37,030 INFO L226 Difference]: Without dead ends: 150 [2020-10-27 19:41:37,031 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-27 19:41:37,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-10-27 19:41:37,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 147. [2020-10-27 19:41:37,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-10-27 19:41:37,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 148 transitions. [2020-10-27 19:41:37,042 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 148 transitions. Word has length 140 [2020-10-27 19:41:37,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:41:37,042 INFO L481 AbstractCegarLoop]: Abstraction has 147 states and 148 transitions. [2020-10-27 19:41:37,042 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-27 19:41:37,042 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 148 transitions. [2020-10-27 19:41:37,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2020-10-27 19:41:37,044 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:41:37,044 INFO L422 BasicCegarLoop]: trace histogram [20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:41:37,044 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-27 19:41:37,045 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:41:37,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:41:37,045 INFO L82 PathProgramCache]: Analyzing trace with hash 1006192537, now seen corresponding path program 19 times [2020-10-27 19:41:37,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:41:37,046 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1270131332] [2020-10-27 19:41:37,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:41:37,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:41:37,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:41:38,370 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:41:38,370 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 153 [2020-10-27 19:41:38,370 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:41:38,370 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1273 [2020-10-27 19:41:38,371 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:41:38,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-27 19:41:38,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:41:38,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 134 [2020-10-27 19:41:38,371 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:41:39,222 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-27 19:41:39,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:41:39,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:41:39,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:41:39,239 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:41:39,239 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:41:39,239 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:41:39,239 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 19:41:39,239 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:41:39,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:41:39,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:41:39,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:41:39,240 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:41:39,270 INFO L134 CoverageAnalysis]: Checked inductivity of 893 backedges. 0 proven. 893 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:41:39,270 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1270131332] [2020-10-27 19:41:39,270 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:41:39,270 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-27 19:41:39,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790515343] [2020-10-27 19:41:39,271 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-27 19:41:39,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:41:39,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-27 19:41:39,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-27 19:41:39,272 INFO L87 Difference]: Start difference. First operand 147 states and 148 transitions. Second operand 32 states. [2020-10-27 19:41:39,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:41:39,644 INFO L93 Difference]: Finished difference Result 163 states and 165 transitions. [2020-10-27 19:41:39,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-27 19:41:39,645 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 145 [2020-10-27 19:41:39,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:41:39,646 INFO L225 Difference]: With dead ends: 163 [2020-10-27 19:41:39,646 INFO L226 Difference]: Without dead ends: 155 [2020-10-27 19:41:39,647 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-27 19:41:39,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-10-27 19:41:39,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 152. [2020-10-27 19:41:39,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-10-27 19:41:39,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 153 transitions. [2020-10-27 19:41:39,656 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 153 transitions. Word has length 145 [2020-10-27 19:41:39,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:41:39,656 INFO L481 AbstractCegarLoop]: Abstraction has 152 states and 153 transitions. [2020-10-27 19:41:39,656 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-27 19:41:39,656 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 153 transitions. [2020-10-27 19:41:39,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2020-10-27 19:41:39,661 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:41:39,662 INFO L422 BasicCegarLoop]: trace histogram [21, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:41:39,662 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-27 19:41:39,664 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:41:39,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:41:39,664 INFO L82 PathProgramCache]: Analyzing trace with hash -754081927, now seen corresponding path program 20 times [2020-10-27 19:41:39,664 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:41:39,665 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1674733367] [2020-10-27 19:41:39,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:41:39,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:41:39,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:41:41,113 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:41:41,113 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 158 [2020-10-27 19:41:41,113 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:41:41,113 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1378 [2020-10-27 19:41:41,113 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:41:41,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-27 19:41:41,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:41:41,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 139 [2020-10-27 19:41:41,114 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:41:41,999 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-27 19:41:42,001 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:41:42,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:41:42,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:41:42,020 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:41:42,021 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:41:42,021 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:41:42,021 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-27 19:41:42,021 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:41:42,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:41:42,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:41:42,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:41:42,022 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:41:42,063 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:41:42,064 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1674733367] [2020-10-27 19:41:42,064 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:41:42,064 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-27 19:41:42,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532556059] [2020-10-27 19:41:42,065 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-27 19:41:42,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:41:42,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-27 19:41:42,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-27 19:41:42,066 INFO L87 Difference]: Start difference. First operand 152 states and 153 transitions. Second operand 33 states. [2020-10-27 19:41:42,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:41:42,461 INFO L93 Difference]: Finished difference Result 168 states and 170 transitions. [2020-10-27 19:41:42,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-27 19:41:42,463 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 150 [2020-10-27 19:41:42,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:41:42,465 INFO L225 Difference]: With dead ends: 168 [2020-10-27 19:41:42,465 INFO L226 Difference]: Without dead ends: 160 [2020-10-27 19:41:42,466 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-27 19:41:42,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-10-27 19:41:42,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 157. [2020-10-27 19:41:42,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-10-27 19:41:42,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 158 transitions. [2020-10-27 19:41:42,478 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 158 transitions. Word has length 150 [2020-10-27 19:41:42,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:41:42,479 INFO L481 AbstractCegarLoop]: Abstraction has 157 states and 158 transitions. [2020-10-27 19:41:42,479 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-27 19:41:42,479 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 158 transitions. [2020-10-27 19:41:42,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2020-10-27 19:41:42,481 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:41:42,481 INFO L422 BasicCegarLoop]: trace histogram [22, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:41:42,481 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-27 19:41:42,481 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:41:42,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:41:42,482 INFO L82 PathProgramCache]: Analyzing trace with hash 2085958553, now seen corresponding path program 21 times [2020-10-27 19:41:42,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:41:42,483 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1088631337] [2020-10-27 19:41:42,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:41:42,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:41:42,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:41:43,907 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:41:43,907 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 163 [2020-10-27 19:41:43,907 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:41:43,907 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1384 [2020-10-27 19:41:43,907 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:41:43,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-27 19:41:43,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:41:43,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 144 [2020-10-27 19:41:43,908 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:41:44,802 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-27 19:41:44,803 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:41:44,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:41:44,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:41:44,814 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:41:44,814 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:41:44,814 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:41:44,814 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 19:41:44,814 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:41:44,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:41:44,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:41:44,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:41:44,815 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:41:44,844 INFO L134 CoverageAnalysis]: Checked inductivity of 1092 backedges. 0 proven. 1092 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:41:44,844 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1088631337] [2020-10-27 19:41:44,844 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:41:44,844 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-27 19:41:44,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518107993] [2020-10-27 19:41:44,845 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-27 19:41:44,845 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:41:44,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-27 19:41:44,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-27 19:41:44,846 INFO L87 Difference]: Start difference. First operand 157 states and 158 transitions. Second operand 34 states. [2020-10-27 19:41:45,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:41:45,196 INFO L93 Difference]: Finished difference Result 173 states and 175 transitions. [2020-10-27 19:41:45,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-27 19:41:45,196 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 155 [2020-10-27 19:41:45,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:41:45,198 INFO L225 Difference]: With dead ends: 173 [2020-10-27 19:41:45,198 INFO L226 Difference]: Without dead ends: 165 [2020-10-27 19:41:45,199 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-27 19:41:45,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-10-27 19:41:45,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 162. [2020-10-27 19:41:45,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-10-27 19:41:45,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 163 transitions. [2020-10-27 19:41:45,208 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 163 transitions. Word has length 155 [2020-10-27 19:41:45,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:41:45,208 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 163 transitions. [2020-10-27 19:41:45,209 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-27 19:41:45,209 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 163 transitions. [2020-10-27 19:41:45,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2020-10-27 19:41:45,210 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:41:45,210 INFO L422 BasicCegarLoop]: trace histogram [23, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:41:45,212 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-27 19:41:45,212 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:41:45,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:41:45,213 INFO L82 PathProgramCache]: Analyzing trace with hash 1262826361, now seen corresponding path program 22 times [2020-10-27 19:41:45,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:41:45,213 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1460585904] [2020-10-27 19:41:45,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:41:45,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:41:45,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:41:46,775 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:41:46,775 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 168 [2020-10-27 19:41:46,775 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:41:46,775 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1510 [2020-10-27 19:41:46,775 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:41:46,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-27 19:41:46,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:41:46,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 149 [2020-10-27 19:41:46,776 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:41:47,807 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-27 19:41:47,809 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:41:47,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:41:47,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:41:47,824 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:41:47,824 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:41:47,824 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:41:47,824 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 19:41:47,824 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:41:47,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:41:47,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:41:47,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:41:47,825 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:41:47,871 INFO L134 CoverageAnalysis]: Checked inductivity of 1199 backedges. 0 proven. 1199 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:41:47,872 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1460585904] [2020-10-27 19:41:47,872 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:41:47,872 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-27 19:41:47,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604593988] [2020-10-27 19:41:47,873 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-27 19:41:47,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:41:47,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-27 19:41:47,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-27 19:41:47,874 INFO L87 Difference]: Start difference. First operand 162 states and 163 transitions. Second operand 35 states. [2020-10-27 19:41:48,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:41:48,224 INFO L93 Difference]: Finished difference Result 178 states and 180 transitions. [2020-10-27 19:41:48,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-27 19:41:48,225 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 160 [2020-10-27 19:41:48,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:41:48,227 INFO L225 Difference]: With dead ends: 178 [2020-10-27 19:41:48,227 INFO L226 Difference]: Without dead ends: 170 [2020-10-27 19:41:48,228 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-27 19:41:48,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-10-27 19:41:48,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 167. [2020-10-27 19:41:48,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-10-27 19:41:48,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 168 transitions. [2020-10-27 19:41:48,234 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 168 transitions. Word has length 160 [2020-10-27 19:41:48,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:41:48,234 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 168 transitions. [2020-10-27 19:41:48,234 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-27 19:41:48,234 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 168 transitions. [2020-10-27 19:41:48,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2020-10-27 19:41:48,235 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:41:48,235 INFO L422 BasicCegarLoop]: trace histogram [24, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:41:48,235 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-27 19:41:48,235 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:41:48,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:41:48,236 INFO L82 PathProgramCache]: Analyzing trace with hash 465182617, now seen corresponding path program 23 times [2020-10-27 19:41:48,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:41:48,236 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1958199189] [2020-10-27 19:41:48,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:41:48,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:41:48,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:41:49,778 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:41:49,779 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 173 [2020-10-27 19:41:49,779 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:41:49,779 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1500 [2020-10-27 19:41:49,779 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:41:49,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-27 19:41:49,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:41:49,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 154 [2020-10-27 19:41:49,779 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:41:50,790 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-27 19:41:50,791 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:41:50,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:41:50,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:41:50,807 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:41:50,808 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:41:50,808 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:41:50,808 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 19:41:50,808 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:41:50,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:41:50,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:41:50,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:41:50,809 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:41:50,855 INFO L134 CoverageAnalysis]: Checked inductivity of 1311 backedges. 0 proven. 1311 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:41:50,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1958199189] [2020-10-27 19:41:50,856 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:41:50,856 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-27 19:41:50,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032921536] [2020-10-27 19:41:50,856 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-27 19:41:50,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:41:50,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-27 19:41:50,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-27 19:41:50,858 INFO L87 Difference]: Start difference. First operand 167 states and 168 transitions. Second operand 36 states. [2020-10-27 19:41:51,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:41:51,267 INFO L93 Difference]: Finished difference Result 183 states and 185 transitions. [2020-10-27 19:41:51,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-27 19:41:51,268 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 165 [2020-10-27 19:41:51,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:41:51,269 INFO L225 Difference]: With dead ends: 183 [2020-10-27 19:41:51,269 INFO L226 Difference]: Without dead ends: 175 [2020-10-27 19:41:51,270 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-27 19:41:51,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-10-27 19:41:51,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 172. [2020-10-27 19:41:51,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2020-10-27 19:41:51,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 173 transitions. [2020-10-27 19:41:51,277 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 173 transitions. Word has length 165 [2020-10-27 19:41:51,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:41:51,278 INFO L481 AbstractCegarLoop]: Abstraction has 172 states and 173 transitions. [2020-10-27 19:41:51,278 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-27 19:41:51,278 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 173 transitions. [2020-10-27 19:41:51,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2020-10-27 19:41:51,279 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:41:51,279 INFO L422 BasicCegarLoop]: trace histogram [25, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:41:51,279 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-27 19:41:51,280 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:41:51,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:41:51,280 INFO L82 PathProgramCache]: Analyzing trace with hash 1645463417, now seen corresponding path program 24 times [2020-10-27 19:41:51,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:41:51,280 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1425478560] [2020-10-27 19:41:51,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:41:51,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:41:51,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:41:52,916 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:41:52,917 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 178 [2020-10-27 19:41:52,917 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:41:52,917 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1589 [2020-10-27 19:41:52,917 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:41:52,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-27 19:41:52,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:41:52,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 159 [2020-10-27 19:41:52,918 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:41:53,961 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-27 19:41:53,962 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:41:53,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:41:53,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:41:53,973 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:41:53,974 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:41:53,974 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:41:53,974 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 19:41:53,974 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:41:53,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:41:53,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:41:53,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:41:53,974 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:41:54,008 INFO L134 CoverageAnalysis]: Checked inductivity of 1428 backedges. 0 proven. 1428 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:41:54,009 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1425478560] [2020-10-27 19:41:54,009 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:41:54,009 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-27 19:41:54,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186104718] [2020-10-27 19:41:54,009 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-27 19:41:54,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:41:54,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-27 19:41:54,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-27 19:41:54,011 INFO L87 Difference]: Start difference. First operand 172 states and 173 transitions. Second operand 37 states. [2020-10-27 19:41:54,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:41:54,399 INFO L93 Difference]: Finished difference Result 188 states and 190 transitions. [2020-10-27 19:41:54,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-27 19:41:54,399 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 170 [2020-10-27 19:41:54,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:41:54,401 INFO L225 Difference]: With dead ends: 188 [2020-10-27 19:41:54,402 INFO L226 Difference]: Without dead ends: 180 [2020-10-27 19:41:54,403 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-27 19:41:54,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-10-27 19:41:54,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 177. [2020-10-27 19:41:54,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2020-10-27 19:41:54,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 178 transitions. [2020-10-27 19:41:54,410 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 178 transitions. Word has length 170 [2020-10-27 19:41:54,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:41:54,411 INFO L481 AbstractCegarLoop]: Abstraction has 177 states and 178 transitions. [2020-10-27 19:41:54,411 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-27 19:41:54,411 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 178 transitions. [2020-10-27 19:41:54,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2020-10-27 19:41:54,412 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:41:54,412 INFO L422 BasicCegarLoop]: trace histogram [26, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:41:54,413 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-27 19:41:54,413 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:41:54,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:41:54,413 INFO L82 PathProgramCache]: Analyzing trace with hash -1561850983, now seen corresponding path program 25 times [2020-10-27 19:41:54,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:41:54,414 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [158164356] [2020-10-27 19:41:54,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:41:54,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:41:54,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:41:56,162 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:41:56,163 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 183 [2020-10-27 19:41:56,163 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:41:56,163 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1700 [2020-10-27 19:41:56,163 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:41:56,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-27 19:41:56,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:41:56,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 164 [2020-10-27 19:41:56,164 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:41:57,235 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-27 19:41:57,236 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:41:57,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:41:57,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:41:57,248 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:41:57,248 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:41:57,248 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:41:57,249 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 19:41:57,249 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:41:57,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:41:57,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:41:57,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:41:57,249 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:41:57,285 INFO L134 CoverageAnalysis]: Checked inductivity of 1550 backedges. 0 proven. 1550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:41:57,285 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [158164356] [2020-10-27 19:41:57,286 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:41:57,286 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-27 19:41:57,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773325425] [2020-10-27 19:41:57,286 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-27 19:41:57,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:41:57,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-27 19:41:57,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-27 19:41:57,288 INFO L87 Difference]: Start difference. First operand 177 states and 178 transitions. Second operand 38 states. [2020-10-27 19:41:57,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:41:57,706 INFO L93 Difference]: Finished difference Result 193 states and 195 transitions. [2020-10-27 19:41:57,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-27 19:41:57,707 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 175 [2020-10-27 19:41:57,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:41:57,709 INFO L225 Difference]: With dead ends: 193 [2020-10-27 19:41:57,710 INFO L226 Difference]: Without dead ends: 185 [2020-10-27 19:41:57,711 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-27 19:41:57,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2020-10-27 19:41:57,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 182. [2020-10-27 19:41:57,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2020-10-27 19:41:57,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 183 transitions. [2020-10-27 19:41:57,718 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 183 transitions. Word has length 175 [2020-10-27 19:41:57,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:41:57,719 INFO L481 AbstractCegarLoop]: Abstraction has 182 states and 183 transitions. [2020-10-27 19:41:57,719 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-27 19:41:57,719 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 183 transitions. [2020-10-27 19:41:57,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2020-10-27 19:41:57,720 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:41:57,720 INFO L422 BasicCegarLoop]: trace histogram [27, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:41:57,720 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-27 19:41:57,721 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:41:57,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:41:57,721 INFO L82 PathProgramCache]: Analyzing trace with hash 112810873, now seen corresponding path program 26 times [2020-10-27 19:41:57,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:41:57,722 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [855782032] [2020-10-27 19:41:57,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:41:57,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:41:57,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:41:59,780 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:41:59,780 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 188 [2020-10-27 19:41:59,780 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:41:59,780 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2005 [2020-10-27 19:41:59,780 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:41:59,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-27 19:41:59,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:41:59,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 169 [2020-10-27 19:41:59,781 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:42:00,914 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-27 19:42:00,915 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:42:00,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:42:00,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:42:00,926 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:42:00,926 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:42:00,926 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:42:00,926 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 19:42:00,926 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:42:00,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:42:00,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:42:00,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:42:00,927 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:42:00,963 INFO L134 CoverageAnalysis]: Checked inductivity of 1677 backedges. 0 proven. 1677 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:42:00,963 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [855782032] [2020-10-27 19:42:00,964 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:42:00,964 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-27 19:42:00,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647725112] [2020-10-27 19:42:00,964 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-27 19:42:00,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:42:00,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-27 19:42:00,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-27 19:42:00,966 INFO L87 Difference]: Start difference. First operand 182 states and 183 transitions. Second operand 39 states. [2020-10-27 19:42:01,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:42:01,371 INFO L93 Difference]: Finished difference Result 198 states and 200 transitions. [2020-10-27 19:42:01,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-27 19:42:01,371 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 180 [2020-10-27 19:42:01,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:42:01,374 INFO L225 Difference]: With dead ends: 198 [2020-10-27 19:42:01,374 INFO L226 Difference]: Without dead ends: 190 [2020-10-27 19:42:01,375 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-27 19:42:01,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-10-27 19:42:01,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 187. [2020-10-27 19:42:01,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2020-10-27 19:42:01,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 188 transitions. [2020-10-27 19:42:01,383 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 188 transitions. Word has length 180 [2020-10-27 19:42:01,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:42:01,383 INFO L481 AbstractCegarLoop]: Abstraction has 187 states and 188 transitions. [2020-10-27 19:42:01,383 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-27 19:42:01,383 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 188 transitions. [2020-10-27 19:42:01,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2020-10-27 19:42:01,385 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:42:01,385 INFO L422 BasicCegarLoop]: trace histogram [28, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:42:01,385 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-27 19:42:01,385 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:42:01,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:42:01,386 INFO L82 PathProgramCache]: Analyzing trace with hash -1432422503, now seen corresponding path program 27 times [2020-10-27 19:42:01,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:42:01,386 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [118346283] [2020-10-27 19:42:01,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:42:01,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:42:01,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:42:03,257 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:42:03,258 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 193 [2020-10-27 19:42:03,258 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:42:03,258 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1824 [2020-10-27 19:42:03,258 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:42:03,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-27 19:42:03,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:42:03,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 174 [2020-10-27 19:42:03,258 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:42:04,448 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-27 19:42:04,450 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:42:04,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:42:04,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:42:04,461 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:42:04,461 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:42:04,461 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:42:04,461 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 19:42:04,462 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:42:04,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:42:04,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:42:04,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:42:04,462 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:42:04,500 INFO L134 CoverageAnalysis]: Checked inductivity of 1809 backedges. 0 proven. 1809 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:42:04,501 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [118346283] [2020-10-27 19:42:04,501 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:42:04,501 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-27 19:42:04,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048061727] [2020-10-27 19:42:04,501 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-27 19:42:04,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:42:04,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-27 19:42:04,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-27 19:42:04,503 INFO L87 Difference]: Start difference. First operand 187 states and 188 transitions. Second operand 40 states. [2020-10-27 19:42:04,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:42:04,882 INFO L93 Difference]: Finished difference Result 203 states and 205 transitions. [2020-10-27 19:42:04,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-27 19:42:04,883 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 185 [2020-10-27 19:42:04,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:42:04,884 INFO L225 Difference]: With dead ends: 203 [2020-10-27 19:42:04,884 INFO L226 Difference]: Without dead ends: 195 [2020-10-27 19:42:04,885 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-27 19:42:04,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2020-10-27 19:42:04,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 192. [2020-10-27 19:42:04,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2020-10-27 19:42:04,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 193 transitions. [2020-10-27 19:42:04,895 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 193 transitions. Word has length 185 [2020-10-27 19:42:04,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:42:04,896 INFO L481 AbstractCegarLoop]: Abstraction has 192 states and 193 transitions. [2020-10-27 19:42:04,896 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-27 19:42:04,896 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 193 transitions. [2020-10-27 19:42:04,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2020-10-27 19:42:04,897 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:42:04,897 INFO L422 BasicCegarLoop]: trace histogram [29, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:42:04,897 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-27 19:42:04,897 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:42:04,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:42:04,898 INFO L82 PathProgramCache]: Analyzing trace with hash 410382201, now seen corresponding path program 28 times [2020-10-27 19:42:04,898 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:42:04,899 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [721896485] [2020-10-27 19:42:04,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:42:04,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:42:04,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:42:06,841 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:42:06,842 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 198 [2020-10-27 19:42:06,842 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:42:06,842 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1886 [2020-10-27 19:42:06,842 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:42:06,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-27 19:42:06,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:42:06,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 179 [2020-10-27 19:42:06,842 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:42:08,068 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-27 19:42:08,069 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:42:08,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:42:08,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:42:08,080 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:42:08,081 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:42:08,081 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:42:08,081 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 19:42:08,081 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:42:08,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:42:08,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:42:08,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:42:08,082 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:42:08,123 INFO L134 CoverageAnalysis]: Checked inductivity of 1946 backedges. 0 proven. 1946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:42:08,123 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [721896485] [2020-10-27 19:42:08,124 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:42:08,124 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-27 19:42:08,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876162547] [2020-10-27 19:42:08,124 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-27 19:42:08,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:42:08,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-27 19:42:08,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-27 19:42:08,126 INFO L87 Difference]: Start difference. First operand 192 states and 193 transitions. Second operand 41 states. [2020-10-27 19:42:08,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:42:08,509 INFO L93 Difference]: Finished difference Result 208 states and 210 transitions. [2020-10-27 19:42:08,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-27 19:42:08,511 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 190 [2020-10-27 19:42:08,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:42:08,513 INFO L225 Difference]: With dead ends: 208 [2020-10-27 19:42:08,513 INFO L226 Difference]: Without dead ends: 200 [2020-10-27 19:42:08,514 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-27 19:42:08,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-10-27 19:42:08,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 197. [2020-10-27 19:42:08,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2020-10-27 19:42:08,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 198 transitions. [2020-10-27 19:42:08,529 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 198 transitions. Word has length 190 [2020-10-27 19:42:08,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:42:08,529 INFO L481 AbstractCegarLoop]: Abstraction has 197 states and 198 transitions. [2020-10-27 19:42:08,529 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-27 19:42:08,530 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 198 transitions. [2020-10-27 19:42:08,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2020-10-27 19:42:08,534 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:42:08,534 INFO L422 BasicCegarLoop]: trace histogram [30, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:42:08,535 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-27 19:42:08,535 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:42:08,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:42:08,537 INFO L82 PathProgramCache]: Analyzing trace with hash -610344039, now seen corresponding path program 29 times [2020-10-27 19:42:08,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:42:08,538 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1549825436] [2020-10-27 19:42:08,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:42:08,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:42:08,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:42:10,787 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:42:10,788 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 203 [2020-10-27 19:42:10,788 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:42:10,788 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2189 [2020-10-27 19:42:10,788 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:42:10,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-27 19:42:10,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:42:10,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 184 [2020-10-27 19:42:10,788 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:42:12,050 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-27 19:42:12,052 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:42:12,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:42:12,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:42:12,065 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:42:12,065 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:42:12,065 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:42:12,065 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 19:42:12,065 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:42:12,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:42:12,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:42:12,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:42:12,066 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:42:12,110 INFO L134 CoverageAnalysis]: Checked inductivity of 2088 backedges. 0 proven. 2088 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:42:12,110 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1549825436] [2020-10-27 19:42:12,110 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:42:12,110 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-10-27 19:42:12,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252808001] [2020-10-27 19:42:12,111 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-27 19:42:12,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:42:12,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-27 19:42:12,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-10-27 19:42:12,112 INFO L87 Difference]: Start difference. First operand 197 states and 198 transitions. Second operand 42 states. [2020-10-27 19:42:12,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:42:12,527 INFO L93 Difference]: Finished difference Result 213 states and 215 transitions. [2020-10-27 19:42:12,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-27 19:42:12,527 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 195 [2020-10-27 19:42:12,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:42:12,530 INFO L225 Difference]: With dead ends: 213 [2020-10-27 19:42:12,530 INFO L226 Difference]: Without dead ends: 205 [2020-10-27 19:42:12,531 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-10-27 19:42:12,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2020-10-27 19:42:12,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 202. [2020-10-27 19:42:12,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202 states. [2020-10-27 19:42:12,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 203 transitions. [2020-10-27 19:42:12,539 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 203 transitions. Word has length 195 [2020-10-27 19:42:12,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:42:12,540 INFO L481 AbstractCegarLoop]: Abstraction has 202 states and 203 transitions. [2020-10-27 19:42:12,540 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-27 19:42:12,540 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 203 transitions. [2020-10-27 19:42:12,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2020-10-27 19:42:12,541 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:42:12,541 INFO L422 BasicCegarLoop]: trace histogram [31, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:42:12,541 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-27 19:42:12,542 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:42:12,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:42:12,542 INFO L82 PathProgramCache]: Analyzing trace with hash 1720288121, now seen corresponding path program 30 times [2020-10-27 19:42:12,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:42:12,542 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [596792368] [2020-10-27 19:42:12,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:42:12,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:42:12,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:42:14,564 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:42:14,564 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 208 [2020-10-27 19:42:14,564 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:42:14,565 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1985 [2020-10-27 19:42:14,565 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:42:14,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 41 [2020-10-27 19:42:14,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:42:14,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 189 [2020-10-27 19:42:14,565 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:42:15,864 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-27 19:42:15,865 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:42:15,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:42:15,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:42:15,886 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:42:15,886 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:42:15,887 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:42:15,887 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 19:42:15,887 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:42:15,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:42:15,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:42:15,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:42:15,887 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:42:15,931 INFO L134 CoverageAnalysis]: Checked inductivity of 2235 backedges. 0 proven. 2235 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:42:15,931 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [596792368] [2020-10-27 19:42:15,931 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:42:15,932 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-10-27 19:42:15,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867038618] [2020-10-27 19:42:15,932 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-27 19:42:15,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:42:15,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-27 19:42:15,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2020-10-27 19:42:15,933 INFO L87 Difference]: Start difference. First operand 202 states and 203 transitions. Second operand 43 states. [2020-10-27 19:42:16,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:42:16,380 INFO L93 Difference]: Finished difference Result 218 states and 220 transitions. [2020-10-27 19:42:16,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-27 19:42:16,380 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 200 [2020-10-27 19:42:16,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:42:16,382 INFO L225 Difference]: With dead ends: 218 [2020-10-27 19:42:16,382 INFO L226 Difference]: Without dead ends: 210 [2020-10-27 19:42:16,386 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2020-10-27 19:42:16,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-10-27 19:42:16,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 207. [2020-10-27 19:42:16,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207 states. [2020-10-27 19:42:16,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 208 transitions. [2020-10-27 19:42:16,404 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 208 transitions. Word has length 200 [2020-10-27 19:42:16,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:42:16,404 INFO L481 AbstractCegarLoop]: Abstraction has 207 states and 208 transitions. [2020-10-27 19:42:16,404 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-27 19:42:16,405 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 208 transitions. [2020-10-27 19:42:16,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2020-10-27 19:42:16,406 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:42:16,406 INFO L422 BasicCegarLoop]: trace histogram [32, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:42:16,406 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-27 19:42:16,406 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:42:16,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:42:16,407 INFO L82 PathProgramCache]: Analyzing trace with hash -290992231, now seen corresponding path program 31 times [2020-10-27 19:42:16,407 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:42:16,407 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [177858841] [2020-10-27 19:42:16,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:42:16,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:42:16,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:42:18,720 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:42:18,720 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 213 [2020-10-27 19:42:18,721 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:42:18,721 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2246 [2020-10-27 19:42:18,721 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:42:18,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 42 [2020-10-27 19:42:18,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:42:18,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 194 [2020-10-27 19:42:18,721 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:42:20,086 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-27 19:42:20,087 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:42:20,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:42:20,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:42:20,100 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:42:20,100 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:42:20,100 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:42:20,100 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 19:42:20,100 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:42:20,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:42:20,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:42:20,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:42:20,101 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:42:20,149 INFO L134 CoverageAnalysis]: Checked inductivity of 2387 backedges. 0 proven. 2387 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:42:20,150 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [177858841] [2020-10-27 19:42:20,150 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:42:20,150 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-10-27 19:42:20,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119096890] [2020-10-27 19:42:20,150 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-10-27 19:42:20,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:42:20,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-10-27 19:42:20,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2020-10-27 19:42:20,152 INFO L87 Difference]: Start difference. First operand 207 states and 208 transitions. Second operand 44 states. [2020-10-27 19:42:20,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:42:20,575 INFO L93 Difference]: Finished difference Result 223 states and 225 transitions. [2020-10-27 19:42:20,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-27 19:42:20,581 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 205 [2020-10-27 19:42:20,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:42:20,583 INFO L225 Difference]: With dead ends: 223 [2020-10-27 19:42:20,583 INFO L226 Difference]: Without dead ends: 215 [2020-10-27 19:42:20,584 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2020-10-27 19:42:20,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2020-10-27 19:42:20,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 212. [2020-10-27 19:42:20,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 212 states. [2020-10-27 19:42:20,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 213 transitions. [2020-10-27 19:42:20,591 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 213 transitions. Word has length 205 [2020-10-27 19:42:20,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:42:20,592 INFO L481 AbstractCegarLoop]: Abstraction has 212 states and 213 transitions. [2020-10-27 19:42:20,592 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-10-27 19:42:20,592 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 213 transitions. [2020-10-27 19:42:20,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2020-10-27 19:42:20,593 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:42:20,594 INFO L422 BasicCegarLoop]: trace histogram [33, 32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:42:20,594 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-27 19:42:20,594 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:42:20,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:42:20,594 INFO L82 PathProgramCache]: Analyzing trace with hash -1338763399, now seen corresponding path program 32 times [2020-10-27 19:42:20,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:42:20,595 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1790031694] [2020-10-27 19:42:20,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:42:20,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:42:20,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:42:22,961 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:42:22,961 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 218 [2020-10-27 19:42:22,961 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:42:22,961 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2318 [2020-10-27 19:42:22,961 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:42:22,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 43 [2020-10-27 19:42:22,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:42:22,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 199 [2020-10-27 19:42:22,961 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:42:24,416 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-27 19:42:24,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:42:24,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:42:24,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:42:24,432 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:42:24,432 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:42:24,432 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:42:24,433 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 19:42:24,433 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:42:24,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:42:24,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:42:24,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:42:24,433 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:42:24,519 INFO L134 CoverageAnalysis]: Checked inductivity of 2544 backedges. 0 proven. 2544 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:42:24,519 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1790031694] [2020-10-27 19:42:24,519 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:42:24,520 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-10-27 19:42:24,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867063912] [2020-10-27 19:42:24,520 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-10-27 19:42:24,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:42:24,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-10-27 19:42:24,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2020-10-27 19:42:24,521 INFO L87 Difference]: Start difference. First operand 212 states and 213 transitions. Second operand 45 states. [2020-10-27 19:42:24,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:42:24,942 INFO L93 Difference]: Finished difference Result 228 states and 230 transitions. [2020-10-27 19:42:24,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-27 19:42:24,942 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 210 [2020-10-27 19:42:24,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:42:24,944 INFO L225 Difference]: With dead ends: 228 [2020-10-27 19:42:24,944 INFO L226 Difference]: Without dead ends: 220 [2020-10-27 19:42:24,945 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2020-10-27 19:42:24,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2020-10-27 19:42:24,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 217. [2020-10-27 19:42:24,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217 states. [2020-10-27 19:42:24,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 218 transitions. [2020-10-27 19:42:24,954 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 218 transitions. Word has length 210 [2020-10-27 19:42:24,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:42:24,954 INFO L481 AbstractCegarLoop]: Abstraction has 217 states and 218 transitions. [2020-10-27 19:42:24,955 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-10-27 19:42:24,955 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 218 transitions. [2020-10-27 19:42:24,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2020-10-27 19:42:24,956 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:42:24,956 INFO L422 BasicCegarLoop]: trace histogram [34, 33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:42:24,956 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-27 19:42:24,957 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:42:24,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:42:24,957 INFO L82 PathProgramCache]: Analyzing trace with hash -1401308263, now seen corresponding path program 33 times [2020-10-27 19:42:24,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:42:24,957 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [422363407] [2020-10-27 19:42:24,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:42:25,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:42:25,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:42:27,416 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:42:27,417 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 223 [2020-10-27 19:42:27,417 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:42:27,417 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2406 [2020-10-27 19:42:27,417 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:42:27,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 44 [2020-10-27 19:42:27,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:42:27,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 204 [2020-10-27 19:42:27,417 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:42:28,889 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-27 19:42:28,890 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:42:28,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:42:28,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:42:28,904 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:42:28,904 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:42:28,905 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:42:28,905 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 19:42:28,905 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:42:28,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:42:28,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:42:28,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:42:28,905 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:42:28,954 INFO L134 CoverageAnalysis]: Checked inductivity of 2706 backedges. 0 proven. 2706 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:42:28,955 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [422363407] [2020-10-27 19:42:28,955 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:42:28,955 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-10-27 19:42:28,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508423720] [2020-10-27 19:42:28,955 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-10-27 19:42:28,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:42:28,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-10-27 19:42:28,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2020-10-27 19:42:28,957 INFO L87 Difference]: Start difference. First operand 217 states and 218 transitions. Second operand 46 states. [2020-10-27 19:42:29,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:42:29,366 INFO L93 Difference]: Finished difference Result 233 states and 235 transitions. [2020-10-27 19:42:29,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-27 19:42:29,366 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 215 [2020-10-27 19:42:29,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:42:29,368 INFO L225 Difference]: With dead ends: 233 [2020-10-27 19:42:29,368 INFO L226 Difference]: Without dead ends: 225 [2020-10-27 19:42:29,369 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2020-10-27 19:42:29,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2020-10-27 19:42:29,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 222. [2020-10-27 19:42:29,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 222 states. [2020-10-27 19:42:29,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 223 transitions. [2020-10-27 19:42:29,377 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 223 transitions. Word has length 215 [2020-10-27 19:42:29,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:42:29,377 INFO L481 AbstractCegarLoop]: Abstraction has 222 states and 223 transitions. [2020-10-27 19:42:29,377 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-10-27 19:42:29,377 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 223 transitions. [2020-10-27 19:42:29,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2020-10-27 19:42:29,378 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:42:29,379 INFO L422 BasicCegarLoop]: trace histogram [35, 34, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:42:29,379 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-27 19:42:29,379 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:42:29,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:42:29,379 INFO L82 PathProgramCache]: Analyzing trace with hash -1531597959, now seen corresponding path program 34 times [2020-10-27 19:42:29,379 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:42:29,380 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1481871811] [2020-10-27 19:42:29,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:42:29,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:42:29,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:42:31,909 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:42:31,910 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 228 [2020-10-27 19:42:31,910 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:42:31,910 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2474 [2020-10-27 19:42:31,910 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:42:31,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 45 [2020-10-27 19:42:31,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:42:31,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 209 [2020-10-27 19:42:31,910 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:42:33,439 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-27 19:42:33,440 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:42:33,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:42:33,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:42:33,451 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:42:33,452 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:42:33,452 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:42:33,452 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 19:42:33,452 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:42:33,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:42:33,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:42:33,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:42:33,452 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:42:33,505 INFO L134 CoverageAnalysis]: Checked inductivity of 2873 backedges. 0 proven. 2873 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:42:33,505 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1481871811] [2020-10-27 19:42:33,505 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:42:33,505 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2020-10-27 19:42:33,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560190528] [2020-10-27 19:42:33,506 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-10-27 19:42:33,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:42:33,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-10-27 19:42:33,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2020-10-27 19:42:33,507 INFO L87 Difference]: Start difference. First operand 222 states and 223 transitions. Second operand 47 states. [2020-10-27 19:42:34,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:42:34,004 INFO L93 Difference]: Finished difference Result 238 states and 240 transitions. [2020-10-27 19:42:34,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-27 19:42:34,005 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 220 [2020-10-27 19:42:34,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:42:34,007 INFO L225 Difference]: With dead ends: 238 [2020-10-27 19:42:34,007 INFO L226 Difference]: Without dead ends: 230 [2020-10-27 19:42:34,008 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2020-10-27 19:42:34,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2020-10-27 19:42:34,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 227. [2020-10-27 19:42:34,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 227 states. [2020-10-27 19:42:34,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 228 transitions. [2020-10-27 19:42:34,023 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 228 transitions. Word has length 220 [2020-10-27 19:42:34,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:42:34,023 INFO L481 AbstractCegarLoop]: Abstraction has 227 states and 228 transitions. [2020-10-27 19:42:34,023 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-10-27 19:42:34,023 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 228 transitions. [2020-10-27 19:42:34,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2020-10-27 19:42:34,025 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:42:34,025 INFO L422 BasicCegarLoop]: trace histogram [36, 35, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:42:34,025 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-27 19:42:34,025 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:42:34,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:42:34,026 INFO L82 PathProgramCache]: Analyzing trace with hash -304830567, now seen corresponding path program 35 times [2020-10-27 19:42:34,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:42:34,026 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [391280447] [2020-10-27 19:42:34,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:42:34,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:42:34,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:42:36,713 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:42:36,713 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 233 [2020-10-27 19:42:36,713 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:42:36,713 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2621 [2020-10-27 19:42:36,713 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:42:36,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 46 [2020-10-27 19:42:36,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:42:36,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 214 [2020-10-27 19:42:36,714 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:42:38,281 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-27 19:42:38,282 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:42:38,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:42:38,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:42:38,293 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:42:38,294 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:42:38,294 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:42:38,294 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 19:42:38,294 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:42:38,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:42:38,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:42:38,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:42:38,294 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:42:38,377 INFO L134 CoverageAnalysis]: Checked inductivity of 3045 backedges. 0 proven. 3045 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:42:38,378 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [391280447] [2020-10-27 19:42:38,378 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:42:38,378 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2020-10-27 19:42:38,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51764596] [2020-10-27 19:42:38,378 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-10-27 19:42:38,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:42:38,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-10-27 19:42:38,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2020-10-27 19:42:38,380 INFO L87 Difference]: Start difference. First operand 227 states and 228 transitions. Second operand 48 states. [2020-10-27 19:42:38,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:42:38,825 INFO L93 Difference]: Finished difference Result 243 states and 245 transitions. [2020-10-27 19:42:38,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-27 19:42:38,826 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 225 [2020-10-27 19:42:38,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:42:38,828 INFO L225 Difference]: With dead ends: 243 [2020-10-27 19:42:38,828 INFO L226 Difference]: Without dead ends: 235 [2020-10-27 19:42:38,829 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2020-10-27 19:42:38,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2020-10-27 19:42:38,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 232. [2020-10-27 19:42:38,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2020-10-27 19:42:38,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 233 transitions. [2020-10-27 19:42:38,837 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 233 transitions. Word has length 225 [2020-10-27 19:42:38,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:42:38,837 INFO L481 AbstractCegarLoop]: Abstraction has 232 states and 233 transitions. [2020-10-27 19:42:38,837 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-10-27 19:42:38,837 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 233 transitions. [2020-10-27 19:42:38,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2020-10-27 19:42:38,839 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:42:38,839 INFO L422 BasicCegarLoop]: trace histogram [37, 36, 36, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:42:38,839 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-27 19:42:38,839 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:42:38,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:42:38,840 INFO L82 PathProgramCache]: Analyzing trace with hash -481411207, now seen corresponding path program 36 times [2020-10-27 19:42:38,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:42:38,840 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1916418944] [2020-10-27 19:42:38,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:42:38,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:42:38,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:42:41,534 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:42:41,534 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 238 [2020-10-27 19:42:41,534 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:42:41,534 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2649 [2020-10-27 19:42:41,534 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:42:41,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 47 [2020-10-27 19:42:41,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:42:41,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 219 [2020-10-27 19:42:41,535 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:42:43,144 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-27 19:42:43,145 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:42:43,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:42:43,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:42:43,157 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:42:43,157 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:42:43,157 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:42:43,157 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 19:42:43,157 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:42:43,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:42:43,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:42:43,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:42:43,158 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:42:43,213 INFO L134 CoverageAnalysis]: Checked inductivity of 3222 backedges. 0 proven. 3222 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:42:43,214 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1916418944] [2020-10-27 19:42:43,214 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:42:43,214 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2020-10-27 19:42:43,214 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257759293] [2020-10-27 19:42:43,214 INFO L461 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-10-27 19:42:43,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:42:43,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-10-27 19:42:43,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2020-10-27 19:42:43,215 INFO L87 Difference]: Start difference. First operand 232 states and 233 transitions. Second operand 49 states. [2020-10-27 19:42:43,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:42:43,663 INFO L93 Difference]: Finished difference Result 248 states and 250 transitions. [2020-10-27 19:42:43,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-27 19:42:43,664 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 230 [2020-10-27 19:42:43,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:42:43,666 INFO L225 Difference]: With dead ends: 248 [2020-10-27 19:42:43,666 INFO L226 Difference]: Without dead ends: 240 [2020-10-27 19:42:43,666 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2020-10-27 19:42:43,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2020-10-27 19:42:43,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 237. [2020-10-27 19:42:43,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 237 states. [2020-10-27 19:42:43,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 238 transitions. [2020-10-27 19:42:43,676 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 238 transitions. Word has length 230 [2020-10-27 19:42:43,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:42:43,676 INFO L481 AbstractCegarLoop]: Abstraction has 237 states and 238 transitions. [2020-10-27 19:42:43,676 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-10-27 19:42:43,676 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 238 transitions. [2020-10-27 19:42:43,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2020-10-27 19:42:43,678 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:42:43,678 INFO L422 BasicCegarLoop]: trace histogram [38, 37, 37, 37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:42:43,678 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-27 19:42:43,678 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:42:43,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:42:43,679 INFO L82 PathProgramCache]: Analyzing trace with hash -1686596711, now seen corresponding path program 37 times [2020-10-27 19:42:43,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:42:43,679 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1044426569] [2020-10-27 19:42:43,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:42:43,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:42:43,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:42:46,653 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:42:46,654 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 243 [2020-10-27 19:42:46,654 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:42:46,654 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2902 [2020-10-27 19:42:46,654 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:42:46,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 48 [2020-10-27 19:42:46,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:42:46,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 224 [2020-10-27 19:42:46,654 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:42:48,350 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-27 19:42:48,351 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:42:48,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:42:48,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:42:48,366 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:42:48,367 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:42:48,367 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:42:48,367 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 19:42:48,367 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:42:48,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:42:48,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:42:48,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:42:48,367 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:42:48,424 INFO L134 CoverageAnalysis]: Checked inductivity of 3404 backedges. 0 proven. 3404 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:42:48,425 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1044426569] [2020-10-27 19:42:48,425 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:42:48,425 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2020-10-27 19:42:48,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566216063] [2020-10-27 19:42:48,425 INFO L461 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-10-27 19:42:48,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:42:48,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-10-27 19:42:48,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2020-10-27 19:42:48,426 INFO L87 Difference]: Start difference. First operand 237 states and 238 transitions. Second operand 50 states. [2020-10-27 19:42:48,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:42:48,895 INFO L93 Difference]: Finished difference Result 253 states and 255 transitions. [2020-10-27 19:42:48,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-10-27 19:42:48,895 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 235 [2020-10-27 19:42:48,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:42:48,898 INFO L225 Difference]: With dead ends: 253 [2020-10-27 19:42:48,898 INFO L226 Difference]: Without dead ends: 245 [2020-10-27 19:42:48,899 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2020-10-27 19:42:48,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2020-10-27 19:42:48,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 242. [2020-10-27 19:42:48,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 242 states. [2020-10-27 19:42:48,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 243 transitions. [2020-10-27 19:42:48,906 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 243 transitions. Word has length 235 [2020-10-27 19:42:48,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:42:48,907 INFO L481 AbstractCegarLoop]: Abstraction has 242 states and 243 transitions. [2020-10-27 19:42:48,907 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-10-27 19:42:48,907 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 243 transitions. [2020-10-27 19:42:48,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2020-10-27 19:42:48,908 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:42:48,909 INFO L422 BasicCegarLoop]: trace histogram [39, 38, 38, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:42:48,909 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-27 19:42:48,909 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:42:48,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:42:48,909 INFO L82 PathProgramCache]: Analyzing trace with hash -79834247, now seen corresponding path program 38 times [2020-10-27 19:42:48,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:42:48,910 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1243477323] [2020-10-27 19:42:48,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:42:48,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:42:48,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:42:51,802 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:42:51,802 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 248 [2020-10-27 19:42:51,802 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:42:51,802 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2837 [2020-10-27 19:42:51,803 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:42:51,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 49 [2020-10-27 19:42:51,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:42:51,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 229 [2020-10-27 19:42:51,803 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:42:53,563 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-27 19:42:53,565 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:42:53,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:42:53,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:42:53,578 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:42:53,578 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:42:53,578 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:42:53,578 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 19:42:53,578 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:42:53,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:42:53,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:42:53,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:42:53,579 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:42:53,673 INFO L134 CoverageAnalysis]: Checked inductivity of 3591 backedges. 0 proven. 3591 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:42:53,673 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1243477323] [2020-10-27 19:42:53,673 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:42:53,673 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51] total 51 [2020-10-27 19:42:53,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234762761] [2020-10-27 19:42:53,674 INFO L461 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-10-27 19:42:53,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:42:53,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-10-27 19:42:53,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1227, Invalid=1323, Unknown=0, NotChecked=0, Total=2550 [2020-10-27 19:42:53,675 INFO L87 Difference]: Start difference. First operand 242 states and 243 transitions. Second operand 51 states. [2020-10-27 19:42:54,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:42:54,178 INFO L93 Difference]: Finished difference Result 258 states and 260 transitions. [2020-10-27 19:42:54,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-10-27 19:42:54,179 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 240 [2020-10-27 19:42:54,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:42:54,181 INFO L225 Difference]: With dead ends: 258 [2020-10-27 19:42:54,181 INFO L226 Difference]: Without dead ends: 250 [2020-10-27 19:42:54,182 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1227, Invalid=1323, Unknown=0, NotChecked=0, Total=2550 [2020-10-27 19:42:54,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2020-10-27 19:42:54,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 247. [2020-10-27 19:42:54,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 247 states. [2020-10-27 19:42:54,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 248 transitions. [2020-10-27 19:42:54,190 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 248 transitions. Word has length 240 [2020-10-27 19:42:54,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:42:54,190 INFO L481 AbstractCegarLoop]: Abstraction has 247 states and 248 transitions. [2020-10-27 19:42:54,190 INFO L482 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-10-27 19:42:54,190 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 248 transitions. [2020-10-27 19:42:54,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2020-10-27 19:42:54,192 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:42:54,192 INFO L422 BasicCegarLoop]: trace histogram [40, 39, 39, 39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:42:54,192 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-27 19:42:54,192 INFO L429 AbstractCegarLoop]: === Iteration 42 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:42:54,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:42:54,193 INFO L82 PathProgramCache]: Analyzing trace with hash -1373274215, now seen corresponding path program 39 times [2020-10-27 19:42:54,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:42:54,193 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [37280871] [2020-10-27 19:42:54,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:42:54,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:42:54,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:42:57,306 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:42:57,306 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 253 [2020-10-27 19:42:57,306 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:42:57,306 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3047 [2020-10-27 19:42:57,306 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:42:57,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 50 [2020-10-27 19:42:57,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:42:57,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 234 [2020-10-27 19:42:57,307 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:42:59,152 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-27 19:42:59,153 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:42:59,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:42:59,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:42:59,165 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:42:59,165 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:42:59,165 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:42:59,165 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 19:42:59,165 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:42:59,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:42:59,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:42:59,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:42:59,166 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:42:59,230 INFO L134 CoverageAnalysis]: Checked inductivity of 3783 backedges. 0 proven. 3783 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:42:59,230 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [37280871] [2020-10-27 19:42:59,230 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:42:59,231 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2020-10-27 19:42:59,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815445870] [2020-10-27 19:42:59,231 INFO L461 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-10-27 19:42:59,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:42:59,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-10-27 19:42:59,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2020-10-27 19:42:59,232 INFO L87 Difference]: Start difference. First operand 247 states and 248 transitions. Second operand 52 states. [2020-10-27 19:42:59,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:42:59,716 INFO L93 Difference]: Finished difference Result 263 states and 265 transitions. [2020-10-27 19:42:59,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-10-27 19:42:59,717 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 245 [2020-10-27 19:42:59,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:42:59,719 INFO L225 Difference]: With dead ends: 263 [2020-10-27 19:42:59,720 INFO L226 Difference]: Without dead ends: 255 [2020-10-27 19:42:59,720 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2020-10-27 19:42:59,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2020-10-27 19:42:59,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 252. [2020-10-27 19:42:59,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 252 states. [2020-10-27 19:42:59,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 253 transitions. [2020-10-27 19:42:59,728 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 253 transitions. Word has length 245 [2020-10-27 19:42:59,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:42:59,729 INFO L481 AbstractCegarLoop]: Abstraction has 252 states and 253 transitions. [2020-10-27 19:42:59,729 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-10-27 19:42:59,729 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 253 transitions. [2020-10-27 19:42:59,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2020-10-27 19:42:59,730 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:42:59,731 INFO L422 BasicCegarLoop]: trace histogram [41, 40, 40, 40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:42:59,731 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-27 19:42:59,731 INFO L429 AbstractCegarLoop]: === Iteration 43 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:42:59,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:42:59,731 INFO L82 PathProgramCache]: Analyzing trace with hash 1808033657, now seen corresponding path program 40 times [2020-10-27 19:42:59,732 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:42:59,732 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [470197225] [2020-10-27 19:42:59,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:42:59,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:42:59,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:43:03,067 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:43:03,067 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 258 [2020-10-27 19:43:03,067 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:43:03,067 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3268 [2020-10-27 19:43:03,067 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:43:03,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 51 [2020-10-27 19:43:03,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:43:03,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 239 [2020-10-27 19:43:03,068 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:43:04,953 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-27 19:43:04,954 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:43:04,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:43:04,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:43:04,967 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:43:04,967 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:43:04,967 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:43:04,967 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 19:43:04,967 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:43:04,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:43:04,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:43:04,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:43:04,968 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:43:05,031 INFO L134 CoverageAnalysis]: Checked inductivity of 3980 backedges. 0 proven. 3980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:43:05,032 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [470197225] [2020-10-27 19:43:05,032 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:43:05,032 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2020-10-27 19:43:05,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713605250] [2020-10-27 19:43:05,033 INFO L461 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-10-27 19:43:05,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:43:05,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-10-27 19:43:05,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1328, Invalid=1428, Unknown=0, NotChecked=0, Total=2756 [2020-10-27 19:43:05,034 INFO L87 Difference]: Start difference. First operand 252 states and 253 transitions. Second operand 53 states. [2020-10-27 19:43:05,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:43:05,523 INFO L93 Difference]: Finished difference Result 268 states and 270 transitions. [2020-10-27 19:43:05,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-10-27 19:43:05,523 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 250 [2020-10-27 19:43:05,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:43:05,526 INFO L225 Difference]: With dead ends: 268 [2020-10-27 19:43:05,526 INFO L226 Difference]: Without dead ends: 260 [2020-10-27 19:43:05,527 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1328, Invalid=1428, Unknown=0, NotChecked=0, Total=2756 [2020-10-27 19:43:05,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2020-10-27 19:43:05,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 257. [2020-10-27 19:43:05,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 257 states. [2020-10-27 19:43:05,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 258 transitions. [2020-10-27 19:43:05,535 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 258 transitions. Word has length 250 [2020-10-27 19:43:05,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:43:05,535 INFO L481 AbstractCegarLoop]: Abstraction has 257 states and 258 transitions. [2020-10-27 19:43:05,535 INFO L482 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-10-27 19:43:05,536 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 258 transitions. [2020-10-27 19:43:05,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2020-10-27 19:43:05,537 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:43:05,537 INFO L422 BasicCegarLoop]: trace histogram [42, 41, 41, 41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:43:05,537 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-27 19:43:05,538 INFO L429 AbstractCegarLoop]: === Iteration 44 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:43:05,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:43:05,538 INFO L82 PathProgramCache]: Analyzing trace with hash 781937561, now seen corresponding path program 41 times [2020-10-27 19:43:05,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:43:05,538 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1259844518] [2020-10-27 19:43:05,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:43:05,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:43:05,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:43:08,814 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:43:08,814 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 263 [2020-10-27 19:43:08,814 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:43:08,814 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3214 [2020-10-27 19:43:08,814 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:43:08,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 52 [2020-10-27 19:43:08,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:43:08,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 244 [2020-10-27 19:43:08,815 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:43:10,769 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-27 19:43:10,770 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:43:10,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:43:10,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:43:10,782 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:43:10,783 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:43:10,783 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:43:10,783 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 19:43:10,783 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:43:10,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:43:10,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:43:10,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:43:10,783 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:43:10,882 INFO L134 CoverageAnalysis]: Checked inductivity of 4182 backedges. 0 proven. 4182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:43:10,883 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1259844518] [2020-10-27 19:43:10,883 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:43:10,883 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54] total 54 [2020-10-27 19:43:10,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564488511] [2020-10-27 19:43:10,884 INFO L461 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-10-27 19:43:10,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:43:10,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-10-27 19:43:10,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2020-10-27 19:43:10,885 INFO L87 Difference]: Start difference. First operand 257 states and 258 transitions. Second operand 54 states. [2020-10-27 19:43:11,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:43:11,423 INFO L93 Difference]: Finished difference Result 273 states and 275 transitions. [2020-10-27 19:43:11,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-10-27 19:43:11,424 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 255 [2020-10-27 19:43:11,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:43:11,426 INFO L225 Difference]: With dead ends: 273 [2020-10-27 19:43:11,426 INFO L226 Difference]: Without dead ends: 265 [2020-10-27 19:43:11,427 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2020-10-27 19:43:11,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2020-10-27 19:43:11,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 262. [2020-10-27 19:43:11,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 262 states. [2020-10-27 19:43:11,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 263 transitions. [2020-10-27 19:43:11,435 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 263 transitions. Word has length 255 [2020-10-27 19:43:11,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:43:11,435 INFO L481 AbstractCegarLoop]: Abstraction has 262 states and 263 transitions. [2020-10-27 19:43:11,435 INFO L482 AbstractCegarLoop]: Interpolant automaton has 54 states. [2020-10-27 19:43:11,435 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 263 transitions. [2020-10-27 19:43:11,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 261 [2020-10-27 19:43:11,437 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:43:11,437 INFO L422 BasicCegarLoop]: trace histogram [43, 42, 42, 42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:43:11,437 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-27 19:43:11,437 INFO L429 AbstractCegarLoop]: === Iteration 45 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:43:11,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:43:11,438 INFO L82 PathProgramCache]: Analyzing trace with hash -1541276807, now seen corresponding path program 42 times [2020-10-27 19:43:11,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:43:11,438 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [214658099] [2020-10-27 19:43:11,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:43:11,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:43:11,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:43:14,837 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:43:14,837 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 268 [2020-10-27 19:43:14,837 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:43:14,837 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3350 [2020-10-27 19:43:14,837 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:43:14,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 53 [2020-10-27 19:43:14,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:43:14,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 249 [2020-10-27 19:43:14,838 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:43:16,853 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-27 19:43:16,854 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:43:16,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:43:16,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:43:16,865 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:43:16,865 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:43:16,865 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:43:16,866 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 19:43:16,866 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:43:16,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:43:16,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:43:16,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:43:16,866 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:43:16,971 INFO L134 CoverageAnalysis]: Checked inductivity of 4389 backedges. 0 proven. 4389 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:43:16,971 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [214658099] [2020-10-27 19:43:16,972 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:43:16,972 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55] total 55 [2020-10-27 19:43:16,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898709797] [2020-10-27 19:43:16,972 INFO L461 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-10-27 19:43:16,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:43:16,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-10-27 19:43:16,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1433, Invalid=1537, Unknown=0, NotChecked=0, Total=2970 [2020-10-27 19:43:16,974 INFO L87 Difference]: Start difference. First operand 262 states and 263 transitions. Second operand 55 states. [2020-10-27 19:43:17,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:43:17,498 INFO L93 Difference]: Finished difference Result 278 states and 280 transitions. [2020-10-27 19:43:17,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-10-27 19:43:17,499 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 260 [2020-10-27 19:43:17,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:43:17,501 INFO L225 Difference]: With dead ends: 278 [2020-10-27 19:43:17,501 INFO L226 Difference]: Without dead ends: 270 [2020-10-27 19:43:17,502 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1433, Invalid=1537, Unknown=0, NotChecked=0, Total=2970 [2020-10-27 19:43:17,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2020-10-27 19:43:17,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 267. [2020-10-27 19:43:17,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 267 states. [2020-10-27 19:43:17,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 268 transitions. [2020-10-27 19:43:17,510 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 268 transitions. Word has length 260 [2020-10-27 19:43:17,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:43:17,511 INFO L481 AbstractCegarLoop]: Abstraction has 267 states and 268 transitions. [2020-10-27 19:43:17,511 INFO L482 AbstractCegarLoop]: Interpolant automaton has 55 states. [2020-10-27 19:43:17,511 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 268 transitions. [2020-10-27 19:43:17,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2020-10-27 19:43:17,512 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:43:17,513 INFO L422 BasicCegarLoop]: trace histogram [44, 43, 43, 43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:43:17,513 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-27 19:43:17,513 INFO L429 AbstractCegarLoop]: === Iteration 46 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:43:17,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:43:17,513 INFO L82 PathProgramCache]: Analyzing trace with hash 899307417, now seen corresponding path program 43 times [2020-10-27 19:43:17,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:43:17,514 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [529320352] [2020-10-27 19:43:17,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:43:17,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:43:17,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:43:20,989 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:43:20,989 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 273 [2020-10-27 19:43:20,989 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:43:20,989 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3421 [2020-10-27 19:43:20,989 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:43:20,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 54 [2020-10-27 19:43:20,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:43:20,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 254 [2020-10-27 19:43:20,990 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:43:23,071 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-27 19:43:23,072 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:43:23,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:43:23,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:43:23,084 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:43:23,084 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:43:23,084 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:43:23,085 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 19:43:23,085 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:43:23,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:43:23,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:43:23,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:43:23,085 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:43:23,192 INFO L134 CoverageAnalysis]: Checked inductivity of 4601 backedges. 0 proven. 4601 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:43:23,192 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [529320352] [2020-10-27 19:43:23,192 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:43:23,193 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56] total 56 [2020-10-27 19:43:23,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226959531] [2020-10-27 19:43:23,193 INFO L461 AbstractCegarLoop]: Interpolant automaton has 56 states [2020-10-27 19:43:23,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:43:23,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2020-10-27 19:43:23,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1487, Invalid=1593, Unknown=0, NotChecked=0, Total=3080 [2020-10-27 19:43:23,194 INFO L87 Difference]: Start difference. First operand 267 states and 268 transitions. Second operand 56 states. [2020-10-27 19:43:23,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:43:23,762 INFO L93 Difference]: Finished difference Result 283 states and 285 transitions. [2020-10-27 19:43:23,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-10-27 19:43:23,763 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 265 [2020-10-27 19:43:23,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:43:23,765 INFO L225 Difference]: With dead ends: 283 [2020-10-27 19:43:23,765 INFO L226 Difference]: Without dead ends: 275 [2020-10-27 19:43:23,766 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1487, Invalid=1593, Unknown=0, NotChecked=0, Total=3080 [2020-10-27 19:43:23,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2020-10-27 19:43:23,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 272. [2020-10-27 19:43:23,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 272 states. [2020-10-27 19:43:23,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 273 transitions. [2020-10-27 19:43:23,774 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 273 transitions. Word has length 265 [2020-10-27 19:43:23,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:43:23,774 INFO L481 AbstractCegarLoop]: Abstraction has 272 states and 273 transitions. [2020-10-27 19:43:23,774 INFO L482 AbstractCegarLoop]: Interpolant automaton has 56 states. [2020-10-27 19:43:23,774 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 273 transitions. [2020-10-27 19:43:23,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2020-10-27 19:43:23,776 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:43:23,776 INFO L422 BasicCegarLoop]: trace histogram [45, 44, 44, 44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:43:23,776 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-27 19:43:23,776 INFO L429 AbstractCegarLoop]: === Iteration 47 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:43:23,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:43:23,777 INFO L82 PathProgramCache]: Analyzing trace with hash 60198777, now seen corresponding path program 44 times [2020-10-27 19:43:23,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:43:23,777 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1317364852] [2020-10-27 19:43:23,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:43:23,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:43:23,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:43:27,377 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:43:27,377 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 278 [2020-10-27 19:43:27,377 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:43:27,377 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3531 [2020-10-27 19:43:27,377 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:43:27,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 55 [2020-10-27 19:43:27,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:43:27,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 259 [2020-10-27 19:43:27,378 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:43:29,605 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-27 19:43:29,606 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:43:29,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:43:29,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:43:29,617 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:43:29,618 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:43:29,618 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:43:29,618 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 19:43:29,618 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:43:29,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:43:29,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:43:29,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:43:29,618 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:43:29,688 INFO L134 CoverageAnalysis]: Checked inductivity of 4818 backedges. 0 proven. 4818 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:43:29,688 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1317364852] [2020-10-27 19:43:29,689 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:43:29,689 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57] total 57 [2020-10-27 19:43:29,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018433050] [2020-10-27 19:43:29,689 INFO L461 AbstractCegarLoop]: Interpolant automaton has 57 states [2020-10-27 19:43:29,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:43:29,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2020-10-27 19:43:29,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1542, Invalid=1650, Unknown=0, NotChecked=0, Total=3192 [2020-10-27 19:43:29,691 INFO L87 Difference]: Start difference. First operand 272 states and 273 transitions. Second operand 57 states. [2020-10-27 19:43:30,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:43:30,166 INFO L93 Difference]: Finished difference Result 288 states and 290 transitions. [2020-10-27 19:43:30,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-10-27 19:43:30,167 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 270 [2020-10-27 19:43:30,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:43:30,169 INFO L225 Difference]: With dead ends: 288 [2020-10-27 19:43:30,170 INFO L226 Difference]: Without dead ends: 280 [2020-10-27 19:43:30,170 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1542, Invalid=1650, Unknown=0, NotChecked=0, Total=3192 [2020-10-27 19:43:30,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2020-10-27 19:43:30,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 277. [2020-10-27 19:43:30,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 277 states. [2020-10-27 19:43:30,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 278 transitions. [2020-10-27 19:43:30,179 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 278 transitions. Word has length 270 [2020-10-27 19:43:30,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:43:30,179 INFO L481 AbstractCegarLoop]: Abstraction has 277 states and 278 transitions. [2020-10-27 19:43:30,179 INFO L482 AbstractCegarLoop]: Interpolant automaton has 57 states. [2020-10-27 19:43:30,179 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 278 transitions. [2020-10-27 19:43:30,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 276 [2020-10-27 19:43:30,181 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:43:30,181 INFO L422 BasicCegarLoop]: trace histogram [46, 45, 45, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:43:30,181 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-27 19:43:30,181 INFO L429 AbstractCegarLoop]: === Iteration 48 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:43:30,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:43:30,182 INFO L82 PathProgramCache]: Analyzing trace with hash -337493095, now seen corresponding path program 45 times [2020-10-27 19:43:30,182 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:43:30,182 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1231554514] [2020-10-27 19:43:30,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:43:30,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:43:30,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:43:34,200 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:43:34,201 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 283 [2020-10-27 19:43:34,201 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:43:34,201 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3943 [2020-10-27 19:43:34,201 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:43:34,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 56 [2020-10-27 19:43:34,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:43:34,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 264 [2020-10-27 19:43:34,201 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:43:36,461 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-27 19:43:36,463 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:43:36,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:43:36,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:43:36,476 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:43:36,476 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:43:36,476 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:43:36,476 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 19:43:36,476 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:43:36,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:43:36,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:43:36,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:43:36,477 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:43:36,549 INFO L134 CoverageAnalysis]: Checked inductivity of 5040 backedges. 0 proven. 5040 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:43:36,550 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1231554514] [2020-10-27 19:43:36,550 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:43:36,550 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58] total 58 [2020-10-27 19:43:36,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611071672] [2020-10-27 19:43:36,550 INFO L461 AbstractCegarLoop]: Interpolant automaton has 58 states [2020-10-27 19:43:36,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:43:36,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2020-10-27 19:43:36,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1598, Invalid=1708, Unknown=0, NotChecked=0, Total=3306 [2020-10-27 19:43:36,551 INFO L87 Difference]: Start difference. First operand 277 states and 278 transitions. Second operand 58 states. [2020-10-27 19:43:37,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:43:37,116 INFO L93 Difference]: Finished difference Result 293 states and 295 transitions. [2020-10-27 19:43:37,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2020-10-27 19:43:37,117 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 275 [2020-10-27 19:43:37,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:43:37,119 INFO L225 Difference]: With dead ends: 293 [2020-10-27 19:43:37,120 INFO L226 Difference]: Without dead ends: 285 [2020-10-27 19:43:37,120 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1598, Invalid=1708, Unknown=0, NotChecked=0, Total=3306 [2020-10-27 19:43:37,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2020-10-27 19:43:37,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 282. [2020-10-27 19:43:37,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 282 states. [2020-10-27 19:43:37,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 283 transitions. [2020-10-27 19:43:37,128 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 283 transitions. Word has length 275 [2020-10-27 19:43:37,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:43:37,129 INFO L481 AbstractCegarLoop]: Abstraction has 282 states and 283 transitions. [2020-10-27 19:43:37,129 INFO L482 AbstractCegarLoop]: Interpolant automaton has 58 states. [2020-10-27 19:43:37,129 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 283 transitions. [2020-10-27 19:43:37,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 281 [2020-10-27 19:43:37,131 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:43:37,131 INFO L422 BasicCegarLoop]: trace histogram [47, 46, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:43:37,131 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-27 19:43:37,131 INFO L429 AbstractCegarLoop]: === Iteration 49 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:43:37,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:43:37,132 INFO L82 PathProgramCache]: Analyzing trace with hash -647879815, now seen corresponding path program 46 times [2020-10-27 19:43:37,132 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:43:37,132 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1014515367] [2020-10-27 19:43:37,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:43:37,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:43:37,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:43:41,165 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:43:41,166 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 288 [2020-10-27 19:43:41,166 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:43:41,166 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3957 [2020-10-27 19:43:41,166 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:43:41,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 57 [2020-10-27 19:43:41,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:43:41,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 269 [2020-10-27 19:43:41,166 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:43:43,481 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-27 19:43:43,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:43:43,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:43:43,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:43:43,495 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:43:43,495 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:43:43,495 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:43:43,495 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 19:43:43,495 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:43:43,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:43:43,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:43:43,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:43:43,496 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:43:43,571 INFO L134 CoverageAnalysis]: Checked inductivity of 5267 backedges. 0 proven. 5267 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:43:43,571 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1014515367] [2020-10-27 19:43:43,571 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:43:43,572 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59] total 59 [2020-10-27 19:43:43,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999807158] [2020-10-27 19:43:43,572 INFO L461 AbstractCegarLoop]: Interpolant automaton has 59 states [2020-10-27 19:43:43,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:43:43,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2020-10-27 19:43:43,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1655, Invalid=1767, Unknown=0, NotChecked=0, Total=3422 [2020-10-27 19:43:43,573 INFO L87 Difference]: Start difference. First operand 282 states and 283 transitions. Second operand 59 states. [2020-10-27 19:43:44,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:43:44,097 INFO L93 Difference]: Finished difference Result 298 states and 300 transitions. [2020-10-27 19:43:44,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2020-10-27 19:43:44,098 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 280 [2020-10-27 19:43:44,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:43:44,100 INFO L225 Difference]: With dead ends: 298 [2020-10-27 19:43:44,101 INFO L226 Difference]: Without dead ends: 290 [2020-10-27 19:43:44,101 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1655, Invalid=1767, Unknown=0, NotChecked=0, Total=3422 [2020-10-27 19:43:44,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2020-10-27 19:43:44,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 287. [2020-10-27 19:43:44,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 287 states. [2020-10-27 19:43:44,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 288 transitions. [2020-10-27 19:43:44,109 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 288 transitions. Word has length 280 [2020-10-27 19:43:44,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:43:44,109 INFO L481 AbstractCegarLoop]: Abstraction has 287 states and 288 transitions. [2020-10-27 19:43:44,109 INFO L482 AbstractCegarLoop]: Interpolant automaton has 59 states. [2020-10-27 19:43:44,110 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 288 transitions. [2020-10-27 19:43:44,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 286 [2020-10-27 19:43:44,111 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:43:44,111 INFO L422 BasicCegarLoop]: trace histogram [48, 47, 47, 47, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:43:44,112 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-27 19:43:44,112 INFO L429 AbstractCegarLoop]: === Iteration 50 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:43:44,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:43:44,112 INFO L82 PathProgramCache]: Analyzing trace with hash -1976356967, now seen corresponding path program 47 times [2020-10-27 19:43:44,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:43:44,113 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1085721407] [2020-10-27 19:43:44,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:43:44,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:43:44,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:43:48,169 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:43:48,169 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 293 [2020-10-27 19:43:48,169 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:43:48,170 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3949 [2020-10-27 19:43:48,170 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:43:48,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 58 [2020-10-27 19:43:48,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:43:48,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 274 [2020-10-27 19:43:48,170 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:43:50,582 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-27 19:43:50,584 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:43:50,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:43:50,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:43:50,596 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:43:50,596 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:43:50,596 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:43:50,596 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 19:43:50,596 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:43:50,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:43:50,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:43:50,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:43:50,597 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:43:50,676 INFO L134 CoverageAnalysis]: Checked inductivity of 5499 backedges. 0 proven. 5499 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:43:50,676 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1085721407] [2020-10-27 19:43:50,677 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:43:50,677 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60] total 60 [2020-10-27 19:43:50,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403132566] [2020-10-27 19:43:50,677 INFO L461 AbstractCegarLoop]: Interpolant automaton has 60 states [2020-10-27 19:43:50,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:43:50,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2020-10-27 19:43:50,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1713, Invalid=1827, Unknown=0, NotChecked=0, Total=3540 [2020-10-27 19:43:50,679 INFO L87 Difference]: Start difference. First operand 287 states and 288 transitions. Second operand 60 states. [2020-10-27 19:43:51,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:43:51,162 INFO L93 Difference]: Finished difference Result 303 states and 305 transitions. [2020-10-27 19:43:51,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2020-10-27 19:43:51,162 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 285 [2020-10-27 19:43:51,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:43:51,165 INFO L225 Difference]: With dead ends: 303 [2020-10-27 19:43:51,165 INFO L226 Difference]: Without dead ends: 295 [2020-10-27 19:43:51,166 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1713, Invalid=1827, Unknown=0, NotChecked=0, Total=3540 [2020-10-27 19:43:51,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2020-10-27 19:43:51,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 292. [2020-10-27 19:43:51,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 292 states. [2020-10-27 19:43:51,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 293 transitions. [2020-10-27 19:43:51,174 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 293 transitions. Word has length 285 [2020-10-27 19:43:51,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:43:51,174 INFO L481 AbstractCegarLoop]: Abstraction has 292 states and 293 transitions. [2020-10-27 19:43:51,175 INFO L482 AbstractCegarLoop]: Interpolant automaton has 60 states. [2020-10-27 19:43:51,175 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 293 transitions. [2020-10-27 19:43:51,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 291 [2020-10-27 19:43:51,176 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:43:51,177 INFO L422 BasicCegarLoop]: trace histogram [49, 48, 48, 48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:43:51,177 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-10-27 19:43:51,177 INFO L429 AbstractCegarLoop]: === Iteration 51 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:43:51,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:43:51,177 INFO L82 PathProgramCache]: Analyzing trace with hash 1690613625, now seen corresponding path program 48 times [2020-10-27 19:43:51,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:43:51,178 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1286724623] [2020-10-27 19:43:51,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:43:51,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:43:51,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:43:55,512 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:43:55,512 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 298 [2020-10-27 19:43:55,512 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:43:55,512 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4258 [2020-10-27 19:43:55,512 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:43:55,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 59 [2020-10-27 19:43:55,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:43:55,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 279 [2020-10-27 19:43:55,513 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:43:58,012 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-27 19:43:58,014 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:43:58,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:43:58,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:43:58,028 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:43:58,028 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:43:58,028 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:43:58,028 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 19:43:58,028 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:43:58,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:43:58,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:43:58,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:43:58,029 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:43:58,121 INFO L134 CoverageAnalysis]: Checked inductivity of 5736 backedges. 0 proven. 5736 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:43:58,122 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1286724623] [2020-10-27 19:43:58,122 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:43:58,122 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61] total 61 [2020-10-27 19:43:58,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471848512] [2020-10-27 19:43:58,123 INFO L461 AbstractCegarLoop]: Interpolant automaton has 61 states [2020-10-27 19:43:58,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:43:58,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2020-10-27 19:43:58,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1772, Invalid=1888, Unknown=0, NotChecked=0, Total=3660 [2020-10-27 19:43:58,124 INFO L87 Difference]: Start difference. First operand 292 states and 293 transitions. Second operand 61 states. [2020-10-27 19:43:58,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:43:58,722 INFO L93 Difference]: Finished difference Result 308 states and 310 transitions. [2020-10-27 19:43:58,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2020-10-27 19:43:58,722 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 290 [2020-10-27 19:43:58,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:43:58,725 INFO L225 Difference]: With dead ends: 308 [2020-10-27 19:43:58,725 INFO L226 Difference]: Without dead ends: 300 [2020-10-27 19:43:58,726 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1772, Invalid=1888, Unknown=0, NotChecked=0, Total=3660 [2020-10-27 19:43:58,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2020-10-27 19:43:58,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 297. [2020-10-27 19:43:58,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 297 states. [2020-10-27 19:43:58,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 298 transitions. [2020-10-27 19:43:58,733 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 298 transitions. Word has length 290 [2020-10-27 19:43:58,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:43:58,734 INFO L481 AbstractCegarLoop]: Abstraction has 297 states and 298 transitions. [2020-10-27 19:43:58,734 INFO L482 AbstractCegarLoop]: Interpolant automaton has 61 states. [2020-10-27 19:43:58,734 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 298 transitions. [2020-10-27 19:43:58,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 296 [2020-10-27 19:43:58,736 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:43:58,736 INFO L422 BasicCegarLoop]: trace histogram [50, 49, 49, 49, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:43:58,736 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-10-27 19:43:58,736 INFO L429 AbstractCegarLoop]: === Iteration 52 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:43:58,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:43:58,737 INFO L82 PathProgramCache]: Analyzing trace with hash 1498225561, now seen corresponding path program 49 times [2020-10-27 19:43:58,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:43:58,737 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [580547170] [2020-10-27 19:43:58,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:43:58,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:43:58,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:44:03,038 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:44:03,039 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 303 [2020-10-27 19:44:03,039 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:44:03,039 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4201 [2020-10-27 19:44:03,039 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:44:03,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 60 [2020-10-27 19:44:03,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:44:03,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 284 [2020-10-27 19:44:03,039 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:44:05,605 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-27 19:44:05,606 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:44:05,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:44:05,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:44:05,618 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:44:05,619 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:44:05,619 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:44:05,619 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 19:44:05,619 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:44:05,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:44:05,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:44:05,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:44:05,619 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:44:05,703 INFO L134 CoverageAnalysis]: Checked inductivity of 5978 backedges. 0 proven. 5978 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:44:05,703 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [580547170] [2020-10-27 19:44:05,703 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:44:05,704 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62] total 62 [2020-10-27 19:44:05,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421442097] [2020-10-27 19:44:05,704 INFO L461 AbstractCegarLoop]: Interpolant automaton has 62 states [2020-10-27 19:44:05,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:44:05,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2020-10-27 19:44:05,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1832, Invalid=1950, Unknown=0, NotChecked=0, Total=3782 [2020-10-27 19:44:05,705 INFO L87 Difference]: Start difference. First operand 297 states and 298 transitions. Second operand 62 states. [2020-10-27 19:44:06,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:44:06,313 INFO L93 Difference]: Finished difference Result 313 states and 315 transitions. [2020-10-27 19:44:06,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2020-10-27 19:44:06,314 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 295 [2020-10-27 19:44:06,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:44:06,316 INFO L225 Difference]: With dead ends: 313 [2020-10-27 19:44:06,317 INFO L226 Difference]: Without dead ends: 305 [2020-10-27 19:44:06,317 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1832, Invalid=1950, Unknown=0, NotChecked=0, Total=3782 [2020-10-27 19:44:06,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2020-10-27 19:44:06,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 302. [2020-10-27 19:44:06,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 302 states. [2020-10-27 19:44:06,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 303 transitions. [2020-10-27 19:44:06,326 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 303 transitions. Word has length 295 [2020-10-27 19:44:06,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:44:06,327 INFO L481 AbstractCegarLoop]: Abstraction has 302 states and 303 transitions. [2020-10-27 19:44:06,327 INFO L482 AbstractCegarLoop]: Interpolant automaton has 62 states. [2020-10-27 19:44:06,327 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 303 transitions. [2020-10-27 19:44:06,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 301 [2020-10-27 19:44:06,329 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:44:06,329 INFO L422 BasicCegarLoop]: trace histogram [51, 50, 50, 50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:44:06,329 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-10-27 19:44:06,329 INFO L429 AbstractCegarLoop]: === Iteration 53 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:44:06,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:44:06,330 INFO L82 PathProgramCache]: Analyzing trace with hash -721532039, now seen corresponding path program 50 times [2020-10-27 19:44:06,330 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:44:06,330 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1425872586] [2020-10-27 19:44:06,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:44:06,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:44:06,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:44:10,802 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:44:10,802 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 308 [2020-10-27 19:44:10,802 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:44:10,802 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4408 [2020-10-27 19:44:10,802 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:44:10,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 61 [2020-10-27 19:44:10,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:44:10,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 289 [2020-10-27 19:44:10,803 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:44:13,499 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-27 19:44:13,500 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:44:13,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:44:13,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:44:13,515 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:44:13,515 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:44:13,515 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:44:13,515 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 19:44:13,515 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:44:13,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:44:13,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:44:13,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:44:13,516 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:44:13,601 INFO L134 CoverageAnalysis]: Checked inductivity of 6225 backedges. 0 proven. 6225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:44:13,601 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1425872586] [2020-10-27 19:44:13,602 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:44:13,602 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63] total 63 [2020-10-27 19:44:13,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482188788] [2020-10-27 19:44:13,603 INFO L461 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-10-27 19:44:13,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:44:13,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-10-27 19:44:13,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1893, Invalid=2013, Unknown=0, NotChecked=0, Total=3906 [2020-10-27 19:44:13,604 INFO L87 Difference]: Start difference. First operand 302 states and 303 transitions. Second operand 63 states. [2020-10-27 19:44:14,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:44:14,216 INFO L93 Difference]: Finished difference Result 318 states and 320 transitions. [2020-10-27 19:44:14,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2020-10-27 19:44:14,217 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 300 [2020-10-27 19:44:14,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:44:14,219 INFO L225 Difference]: With dead ends: 318 [2020-10-27 19:44:14,219 INFO L226 Difference]: Without dead ends: 310 [2020-10-27 19:44:14,220 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1893, Invalid=2013, Unknown=0, NotChecked=0, Total=3906 [2020-10-27 19:44:14,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2020-10-27 19:44:14,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 307. [2020-10-27 19:44:14,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 307 states. [2020-10-27 19:44:14,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 308 transitions. [2020-10-27 19:44:14,228 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 308 transitions. Word has length 300 [2020-10-27 19:44:14,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:44:14,228 INFO L481 AbstractCegarLoop]: Abstraction has 307 states and 308 transitions. [2020-10-27 19:44:14,228 INFO L482 AbstractCegarLoop]: Interpolant automaton has 63 states. [2020-10-27 19:44:14,228 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 308 transitions. [2020-10-27 19:44:14,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 306 [2020-10-27 19:44:14,230 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:44:14,230 INFO L422 BasicCegarLoop]: trace histogram [52, 51, 51, 51, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:44:14,230 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-10-27 19:44:14,231 INFO L429 AbstractCegarLoop]: === Iteration 54 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:44:14,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:44:14,231 INFO L82 PathProgramCache]: Analyzing trace with hash -1309669479, now seen corresponding path program 51 times [2020-10-27 19:44:14,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:44:14,231 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1701509597] [2020-10-27 19:44:14,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:44:14,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:44:14,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:44:18,839 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:44:18,839 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 313 [2020-10-27 19:44:18,839 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:44:18,839 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4543 [2020-10-27 19:44:18,839 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:44:18,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 62 [2020-10-27 19:44:18,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:44:18,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 294 [2020-10-27 19:44:18,840 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:44:21,570 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-27 19:44:21,571 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:44:21,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:44:21,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:44:21,623 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:44:21,623 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:44:21,623 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:44:21,623 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 47 [2020-10-27 19:44:21,623 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:44:21,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:44:21,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:44:21,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:44:21,624 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:44:21,710 INFO L134 CoverageAnalysis]: Checked inductivity of 6477 backedges. 0 proven. 6477 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:44:21,710 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1701509597] [2020-10-27 19:44:21,710 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:44:21,710 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64] total 64 [2020-10-27 19:44:21,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930218802] [2020-10-27 19:44:21,711 INFO L461 AbstractCegarLoop]: Interpolant automaton has 64 states [2020-10-27 19:44:21,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:44:21,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2020-10-27 19:44:21,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1955, Invalid=2077, Unknown=0, NotChecked=0, Total=4032 [2020-10-27 19:44:21,712 INFO L87 Difference]: Start difference. First operand 307 states and 308 transitions. Second operand 64 states. [2020-10-27 19:44:22,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:44:22,225 INFO L93 Difference]: Finished difference Result 323 states and 325 transitions. [2020-10-27 19:44:22,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2020-10-27 19:44:22,226 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 305 [2020-10-27 19:44:22,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:44:22,228 INFO L225 Difference]: With dead ends: 323 [2020-10-27 19:44:22,229 INFO L226 Difference]: Without dead ends: 315 [2020-10-27 19:44:22,229 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1955, Invalid=2077, Unknown=0, NotChecked=0, Total=4032 [2020-10-27 19:44:22,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2020-10-27 19:44:22,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 312. [2020-10-27 19:44:22,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 312 states. [2020-10-27 19:44:22,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 313 transitions. [2020-10-27 19:44:22,235 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 313 transitions. Word has length 305 [2020-10-27 19:44:22,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:44:22,236 INFO L481 AbstractCegarLoop]: Abstraction has 312 states and 313 transitions. [2020-10-27 19:44:22,236 INFO L482 AbstractCegarLoop]: Interpolant automaton has 64 states. [2020-10-27 19:44:22,236 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 313 transitions. [2020-10-27 19:44:22,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 311 [2020-10-27 19:44:22,238 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:44:22,238 INFO L422 BasicCegarLoop]: trace histogram [53, 52, 52, 52, 52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:44:22,238 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-10-27 19:44:22,238 INFO L429 AbstractCegarLoop]: === Iteration 55 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:44:22,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:44:22,239 INFO L82 PathProgramCache]: Analyzing trace with hash 1229905785, now seen corresponding path program 52 times [2020-10-27 19:44:22,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:44:22,239 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1527681645] [2020-10-27 19:44:22,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:44:22,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:44:22,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:44:27,094 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:44:27,095 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 318 [2020-10-27 19:44:27,095 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:44:27,095 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4773 [2020-10-27 19:44:27,095 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:44:27,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 63 [2020-10-27 19:44:27,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:44:27,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 299 [2020-10-27 19:44:27,095 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:44:29,938 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-27 19:44:29,939 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:44:29,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:44:29,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:44:29,996 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:44:29,996 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:44:29,996 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:44:29,996 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 51 [2020-10-27 19:44:29,996 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:44:29,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:44:29,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:44:29,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:44:29,997 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:44:30,086 INFO L134 CoverageAnalysis]: Checked inductivity of 6734 backedges. 0 proven. 6734 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:44:30,086 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1527681645] [2020-10-27 19:44:30,086 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:44:30,086 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65] total 65 [2020-10-27 19:44:30,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194354830] [2020-10-27 19:44:30,087 INFO L461 AbstractCegarLoop]: Interpolant automaton has 65 states [2020-10-27 19:44:30,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:44:30,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2020-10-27 19:44:30,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2018, Invalid=2142, Unknown=0, NotChecked=0, Total=4160 [2020-10-27 19:44:30,088 INFO L87 Difference]: Start difference. First operand 312 states and 313 transitions. Second operand 65 states. [2020-10-27 19:44:30,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:44:30,697 INFO L93 Difference]: Finished difference Result 328 states and 330 transitions. [2020-10-27 19:44:30,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2020-10-27 19:44:30,698 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 310 [2020-10-27 19:44:30,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:44:30,700 INFO L225 Difference]: With dead ends: 328 [2020-10-27 19:44:30,701 INFO L226 Difference]: Without dead ends: 320 [2020-10-27 19:44:30,701 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=2018, Invalid=2142, Unknown=0, NotChecked=0, Total=4160 [2020-10-27 19:44:30,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2020-10-27 19:44:30,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 317. [2020-10-27 19:44:30,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 317 states. [2020-10-27 19:44:30,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 318 transitions. [2020-10-27 19:44:30,709 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 318 transitions. Word has length 310 [2020-10-27 19:44:30,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:44:30,709 INFO L481 AbstractCegarLoop]: Abstraction has 317 states and 318 transitions. [2020-10-27 19:44:30,709 INFO L482 AbstractCegarLoop]: Interpolant automaton has 65 states. [2020-10-27 19:44:30,709 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 318 transitions. [2020-10-27 19:44:30,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 316 [2020-10-27 19:44:30,711 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:44:30,711 INFO L422 BasicCegarLoop]: trace histogram [54, 53, 53, 53, 53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:44:30,711 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2020-10-27 19:44:30,711 INFO L429 AbstractCegarLoop]: === Iteration 56 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:44:30,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:44:30,712 INFO L82 PathProgramCache]: Analyzing trace with hash -52694119, now seen corresponding path program 53 times [2020-10-27 19:44:30,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:44:30,712 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1508789125] [2020-10-27 19:44:30,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:44:30,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:44:30,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:44:35,592 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:44:35,593 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 323 [2020-10-27 19:44:35,593 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:44:35,593 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4824 [2020-10-27 19:44:35,593 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:44:35,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 64 [2020-10-27 19:44:35,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:44:35,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 304 [2020-10-27 19:44:35,593 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:44:38,518 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-27 19:44:38,519 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:44:38,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:44:38,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:44:38,533 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:44:38,533 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:44:38,533 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:44:38,533 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 19:44:38,533 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:44:38,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:44:38,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:44:38,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:44:38,534 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:44:38,627 INFO L134 CoverageAnalysis]: Checked inductivity of 6996 backedges. 0 proven. 6996 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:44:38,628 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1508789125] [2020-10-27 19:44:38,628 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:44:38,628 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66] total 66 [2020-10-27 19:44:38,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982721312] [2020-10-27 19:44:38,629 INFO L461 AbstractCegarLoop]: Interpolant automaton has 66 states [2020-10-27 19:44:38,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:44:38,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2020-10-27 19:44:38,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2082, Invalid=2208, Unknown=0, NotChecked=0, Total=4290 [2020-10-27 19:44:38,630 INFO L87 Difference]: Start difference. First operand 317 states and 318 transitions. Second operand 66 states. [2020-10-27 19:44:39,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:44:39,261 INFO L93 Difference]: Finished difference Result 333 states and 335 transitions. [2020-10-27 19:44:39,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2020-10-27 19:44:39,262 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 315 [2020-10-27 19:44:39,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:44:39,264 INFO L225 Difference]: With dead ends: 333 [2020-10-27 19:44:39,264 INFO L226 Difference]: Without dead ends: 325 [2020-10-27 19:44:39,265 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=2082, Invalid=2208, Unknown=0, NotChecked=0, Total=4290 [2020-10-27 19:44:39,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2020-10-27 19:44:39,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 322. [2020-10-27 19:44:39,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 322 states. [2020-10-27 19:44:39,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 323 transitions. [2020-10-27 19:44:39,272 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 323 transitions. Word has length 315 [2020-10-27 19:44:39,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:44:39,273 INFO L481 AbstractCegarLoop]: Abstraction has 322 states and 323 transitions. [2020-10-27 19:44:39,273 INFO L482 AbstractCegarLoop]: Interpolant automaton has 66 states. [2020-10-27 19:44:39,273 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 323 transitions. [2020-10-27 19:44:39,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 321 [2020-10-27 19:44:39,275 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:44:39,275 INFO L422 BasicCegarLoop]: trace histogram [55, 54, 54, 54, 54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:44:39,275 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2020-10-27 19:44:39,275 INFO L429 AbstractCegarLoop]: === Iteration 57 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:44:39,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:44:39,276 INFO L82 PathProgramCache]: Analyzing trace with hash -789154951, now seen corresponding path program 54 times [2020-10-27 19:44:39,276 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:44:39,276 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2102167380] [2020-10-27 19:44:39,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:44:39,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:44:39,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:44:44,363 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:44:44,363 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 328 [2020-10-27 19:44:44,364 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:44:44,364 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-27 19:44:44,364 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:44:44,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 65 [2020-10-27 19:44:44,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:44:44,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 309 [2020-10-27 19:44:44,364 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:44:47,375 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-27 19:44:47,376 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:44:47,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:44:47,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:44:47,389 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:44:47,389 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:44:47,389 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:44:47,389 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 19:44:47,389 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:44:47,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:44:47,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:44:47,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:44:47,390 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:44:47,484 INFO L134 CoverageAnalysis]: Checked inductivity of 7263 backedges. 0 proven. 7263 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:44:47,484 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2102167380] [2020-10-27 19:44:47,484 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:44:47,484 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67] total 67 [2020-10-27 19:44:47,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792461570] [2020-10-27 19:44:47,485 INFO L461 AbstractCegarLoop]: Interpolant automaton has 67 states [2020-10-27 19:44:47,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:44:47,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2020-10-27 19:44:47,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2147, Invalid=2275, Unknown=0, NotChecked=0, Total=4422 [2020-10-27 19:44:47,486 INFO L87 Difference]: Start difference. First operand 322 states and 323 transitions. Second operand 67 states. [2020-10-27 19:44:48,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:44:48,073 INFO L93 Difference]: Finished difference Result 338 states and 340 transitions. [2020-10-27 19:44:48,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2020-10-27 19:44:48,074 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 320 [2020-10-27 19:44:48,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:44:48,077 INFO L225 Difference]: With dead ends: 338 [2020-10-27 19:44:48,077 INFO L226 Difference]: Without dead ends: 330 [2020-10-27 19:44:48,077 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=2147, Invalid=2275, Unknown=0, NotChecked=0, Total=4422 [2020-10-27 19:44:48,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2020-10-27 19:44:48,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 327. [2020-10-27 19:44:48,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 327 states. [2020-10-27 19:44:48,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 328 transitions. [2020-10-27 19:44:48,086 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 328 transitions. Word has length 320 [2020-10-27 19:44:48,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:44:48,086 INFO L481 AbstractCegarLoop]: Abstraction has 327 states and 328 transitions. [2020-10-27 19:44:48,086 INFO L482 AbstractCegarLoop]: Interpolant automaton has 67 states. [2020-10-27 19:44:48,086 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 328 transitions. [2020-10-27 19:44:48,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 326 [2020-10-27 19:44:48,088 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:44:48,088 INFO L422 BasicCegarLoop]: trace histogram [56, 55, 55, 55, 55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:44:48,088 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2020-10-27 19:44:48,089 INFO L429 AbstractCegarLoop]: === Iteration 58 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:44:48,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:44:48,089 INFO L82 PathProgramCache]: Analyzing trace with hash -1294934119, now seen corresponding path program 55 times [2020-10-27 19:44:48,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:44:48,089 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1013636204] [2020-10-27 19:44:48,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY