/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/loop-acceleration/const_1-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 14:54:16,229 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 14:54:16,232 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 14:54:16,272 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 14:54:16,273 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 14:54:16,280 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 14:54:16,283 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 14:54:16,288 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 14:54:16,291 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 14:54:16,297 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 14:54:16,298 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 14:54:16,300 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 14:54:16,300 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 14:54:16,303 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 14:54:16,306 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 14:54:16,309 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 14:54:16,310 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 14:54:16,313 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 14:54:16,320 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 14:54:16,328 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 14:54:16,330 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 14:54:16,333 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 14:54:16,334 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 14:54:16,337 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 14:54:16,345 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 14:54:16,345 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 14:54:16,346 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 14:54:16,348 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 14:54:16,348 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 14:54:16,349 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 14:54:16,350 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 14:54:16,351 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 14:54:16,352 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 14:54:16,353 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 14:54:16,354 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 14:54:16,355 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 14:54:16,356 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 14:54:16,356 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 14:54:16,356 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 14:54:16,385 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 14:54:16,385 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 14:54:16,394 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-28 14:54:16,463 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 14:54:16,463 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 14:54:16,467 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 14:54:16,468 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 14:54:16,468 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 14:54:16,468 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 14:54:16,468 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 14:54:16,469 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 14:54:16,469 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 14:54:16,469 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 14:54:16,470 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 14:54:16,470 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 14:54:16,471 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 14:54:16,471 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 14:54:16,471 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 14:54:16,471 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 14:54:16,471 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 14:54:16,472 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 14:54:16,472 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 14:54:16,472 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 14:54:16,472 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 14:54:16,472 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 14:54:16,473 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 14:54:16,473 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 14:54:16,473 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 14:54:16,473 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 14:54:16,473 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 14:54:16,474 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 14:54:16,474 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 14:54:16,474 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 14:54:16,895 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 14:54:16,921 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 14:54:16,924 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 14:54:16,926 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 14:54:16,926 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 14:54:16,927 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/const_1-2.c [2020-10-28 14:54:17,002 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c6faacffc/1291b23ffa5a4c65abf38fa79c43d457/FLAGcc7794452 [2020-10-28 14:54:17,528 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 14:54:17,529 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-acceleration/const_1-2.c [2020-10-28 14:54:17,535 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c6faacffc/1291b23ffa5a4c65abf38fa79c43d457/FLAGcc7794452 [2020-10-28 14:54:17,902 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c6faacffc/1291b23ffa5a4c65abf38fa79c43d457 [2020-10-28 14:54:17,905 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 14:54:17,911 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 14:54:17,913 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 14:54:17,914 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 14:54:17,918 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 14:54:17,919 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 02:54:17" (1/1) ... [2020-10-28 14:54:17,922 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1732d00d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:54:17, skipping insertion in model container [2020-10-28 14:54:17,922 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 02:54:17" (1/1) ... [2020-10-28 14:54:17,931 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 14:54:17,945 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 14:54:18,109 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 14:54:18,119 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 14:54:18,136 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 14:54:18,153 INFO L208 MainTranslator]: Completed translation [2020-10-28 14:54:18,154 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:54:18 WrapperNode [2020-10-28 14:54:18,154 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 14:54:18,156 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 14:54:18,156 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 14:54:18,156 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 14:54:18,170 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:54:18" (1/1) ... [2020-10-28 14:54:18,171 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:54:18" (1/1) ... [2020-10-28 14:54:18,179 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:54:18" (1/1) ... [2020-10-28 14:54:18,179 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:54:18" (1/1) ... [2020-10-28 14:54:18,188 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:54:18" (1/1) ... [2020-10-28 14:54:18,192 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:54:18" (1/1) ... [2020-10-28 14:54:18,194 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:54:18" (1/1) ... [2020-10-28 14:54:18,196 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 14:54:18,197 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 14:54:18,197 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 14:54:18,197 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 14:54:18,198 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:54:18" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 14:54:18,328 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 14:54:18,328 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 14:54:18,328 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 14:54:18,328 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-28 14:54:18,328 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 14:54:18,329 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 14:54:18,329 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 14:54:18,329 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 14:54:18,329 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 14:54:18,329 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-28 14:54:18,329 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 14:54:18,330 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 14:54:18,330 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 14:54:18,330 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 14:54:18,330 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 14:54:18,330 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 14:54:18,330 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 14:54:18,625 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 14:54:18,625 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-28 14:54:18,627 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 02:54:18 BoogieIcfgContainer [2020-10-28 14:54:18,627 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 14:54:18,630 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 14:54:18,630 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 14:54:18,635 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 14:54:18,635 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 02:54:17" (1/3) ... [2020-10-28 14:54:18,636 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ce8cbb1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 02:54:18, skipping insertion in model container [2020-10-28 14:54:18,637 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:54:18" (2/3) ... [2020-10-28 14:54:18,637 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ce8cbb1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 02:54:18, skipping insertion in model container [2020-10-28 14:54:18,637 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 02:54:18" (3/3) ... [2020-10-28 14:54:18,639 INFO L111 eAbstractionObserver]: Analyzing ICFG const_1-2.c [2020-10-28 14:54:18,655 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 14:54:18,661 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 14:54:18,691 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 14:54:18,727 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 14:54:18,727 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 14:54:18,728 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 14:54:18,728 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 14:54:18,728 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 14:54:18,728 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 14:54:18,728 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 14:54:18,729 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 14:54:18,748 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2020-10-28 14:54:18,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-28 14:54:18,754 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:54:18,755 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:54:18,756 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:54:18,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:54:18,762 INFO L82 PathProgramCache]: Analyzing trace with hash 783588435, now seen corresponding path program 1 times [2020-10-28 14:54:18,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:54:18,773 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1673687423] [2020-10-28 14:54:18,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:54:18,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:54:18,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:54:18,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:54:19,456 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:54:19,457 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-28 14:54:19,457 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:54:19,457 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 539 [2020-10-28 14:54:19,460 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:54:19,461 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:54:19,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:54:19,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 14:54:19,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:54:19,462 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-28 14:54:19,643 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2020-10-28 14:54:19,645 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:54:19,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:54:19,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:54:19,682 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:54:19,683 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:54:19,685 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:54:19,685 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-28 14:54:19,685 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:54:19,685 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:54:19,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:54:19,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:54:19,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:54:19,687 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:54:19,706 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:54:19,707 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1673687423] [2020-10-28 14:54:19,710 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:54:19,711 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-28 14:54:19,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186876260] [2020-10-28 14:54:19,721 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-28 14:54:19,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:54:19,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-28 14:54:19,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-28 14:54:19,751 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 3 states. [2020-10-28 14:54:19,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:54:19,853 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2020-10-28 14:54:19,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-28 14:54:19,855 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2020-10-28 14:54:19,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:54:19,863 INFO L225 Difference]: With dead ends: 34 [2020-10-28 14:54:19,863 INFO L226 Difference]: Without dead ends: 13 [2020-10-28 14:54:19,867 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-28 14:54:19,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-10-28 14:54:19,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2020-10-28 14:54:19,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-10-28 14:54:19,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2020-10-28 14:54:19,910 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 12 [2020-10-28 14:54:19,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:54:19,911 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2020-10-28 14:54:19,911 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-28 14:54:19,911 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2020-10-28 14:54:19,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-28 14:54:19,912 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:54:19,912 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:54:19,912 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 14:54:19,913 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:54:19,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:54:19,914 INFO L82 PathProgramCache]: Analyzing trace with hash 669071831, now seen corresponding path program 1 times [2020-10-28 14:54:19,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:54:19,914 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [247213402] [2020-10-28 14:54:19,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:54:19,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:54:19,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:54:19,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:54:20,100 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:54:20,101 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-28 14:54:20,101 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:54:20,101 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 168 [2020-10-28 14:54:20,101 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:54:20,102 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:54:20,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:54:20,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:54:20,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 14:54:20,105 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 14:54:20,230 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:54:20,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:54:20,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:54:20,243 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:54:20,244 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:54:20,244 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:54:20,244 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 14:54:20,244 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:54:20,245 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:54:20,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:54:20,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:54:20,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:54:20,246 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:54:20,252 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:54:20,252 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [247213402] [2020-10-28 14:54:20,253 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:54:20,253 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 14:54:20,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054490495] [2020-10-28 14:54:20,255 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 14:54:20,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:54:20,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 14:54:20,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:54:20,256 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 4 states. [2020-10-28 14:54:20,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:54:20,329 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2020-10-28 14:54:20,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 14:54:20,329 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-10-28 14:54:20,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:54:20,330 INFO L225 Difference]: With dead ends: 20 [2020-10-28 14:54:20,330 INFO L226 Difference]: Without dead ends: 14 [2020-10-28 14:54:20,332 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:54:20,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-10-28 14:54:20,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-10-28 14:54:20,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-10-28 14:54:20,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2020-10-28 14:54:20,340 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2020-10-28 14:54:20,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:54:20,340 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2020-10-28 14:54:20,341 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 14:54:20,341 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2020-10-28 14:54:20,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-28 14:54:20,342 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:54:20,342 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:54:20,342 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 14:54:20,342 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:54:20,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:54:20,343 INFO L82 PathProgramCache]: Analyzing trace with hash 396678398, now seen corresponding path program 1 times [2020-10-28 14:54:20,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:54:20,344 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [74472418] [2020-10-28 14:54:20,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:54:20,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:54:20,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:54:20,432 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:54:20,432 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-28 14:54:20,432 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:54:20,433 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 74 [2020-10-28 14:54:20,433 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:54:20,433 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:54:20,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 14:54:20,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:54:20,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-28 14:54:20,434 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:54:20,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:54:20,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:54:20,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:54:20,513 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:54:20,513 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:54:20,513 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:54:20,513 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 14:54:20,514 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:54:20,514 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:54:20,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:54:20,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:54:20,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:54:20,515 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:54:20,521 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:54:20,522 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [74472418] [2020-10-28 14:54:20,522 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:54:20,522 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 14:54:20,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802619540] [2020-10-28 14:54:20,523 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 14:54:20,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:54:20,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 14:54:20,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:54:20,524 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 5 states. [2020-10-28 14:54:20,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:54:20,637 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2020-10-28 14:54:20,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 14:54:20,638 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-10-28 14:54:20,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:54:20,639 INFO L225 Difference]: With dead ends: 21 [2020-10-28 14:54:20,639 INFO L226 Difference]: Without dead ends: 15 [2020-10-28 14:54:20,640 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-28 14:54:20,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-10-28 14:54:20,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-10-28 14:54:20,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-10-28 14:54:20,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2020-10-28 14:54:20,646 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2020-10-28 14:54:20,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:54:20,647 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2020-10-28 14:54:20,647 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 14:54:20,647 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2020-10-28 14:54:20,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-28 14:54:20,648 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:54:20,648 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:54:20,648 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 14:54:20,648 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:54:20,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:54:20,649 INFO L82 PathProgramCache]: Analyzing trace with hash 542416567, now seen corresponding path program 2 times [2020-10-28 14:54:20,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:54:20,650 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1871214944] [2020-10-28 14:54:20,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:54:20,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:54:20,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:54:20,742 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:54:20,742 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-28 14:54:20,742 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:54:20,743 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 78 [2020-10-28 14:54:20,743 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:54:20,743 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:54:20,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 14:54:20,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:54:20,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-28 14:54:20,744 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:54:20,842 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:54:20,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:54:20,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:54:20,852 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:54:20,853 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:54:20,853 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:54:20,853 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 14:54:20,854 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:54:20,854 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:54:20,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:54:20,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:54:20,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:54:20,855 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:54:20,860 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:54:20,860 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1871214944] [2020-10-28 14:54:20,861 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:54:20,861 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 14:54:20,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974291234] [2020-10-28 14:54:20,862 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 14:54:20,862 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:54:20,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 14:54:20,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-28 14:54:20,863 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 6 states. [2020-10-28 14:54:21,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:54:21,032 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2020-10-28 14:54:21,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 14:54:21,033 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2020-10-28 14:54:21,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:54:21,034 INFO L225 Difference]: With dead ends: 22 [2020-10-28 14:54:21,034 INFO L226 Difference]: Without dead ends: 16 [2020-10-28 14:54:21,035 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-28 14:54:21,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-10-28 14:54:21,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-10-28 14:54:21,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-10-28 14:54:21,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2020-10-28 14:54:21,042 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2020-10-28 14:54:21,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:54:21,042 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2020-10-28 14:54:21,042 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 14:54:21,042 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2020-10-28 14:54:21,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-28 14:54:21,043 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:54:21,043 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:54:21,043 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 14:54:21,044 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:54:21,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:54:21,044 INFO L82 PathProgramCache]: Analyzing trace with hash 765332510, now seen corresponding path program 3 times [2020-10-28 14:54:21,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:54:21,045 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1008263766] [2020-10-28 14:54:21,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:54:21,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:54:21,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:54:21,161 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:54:21,161 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-28 14:54:21,161 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:54:21,162 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 98 [2020-10-28 14:54:21,162 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:54:21,162 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:54:21,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 14:54:21,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:54:21,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-28 14:54:21,163 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:54:21,249 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:54:21,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:54:21,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:54:21,260 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:54:21,260 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:54:21,260 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:54:21,260 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 14:54:21,260 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:54:21,261 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:54:21,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:54:21,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:54:21,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:54:21,261 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:54:21,265 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:54:21,266 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1008263766] [2020-10-28 14:54:21,266 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:54:21,266 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 14:54:21,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768469355] [2020-10-28 14:54:21,267 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 14:54:21,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:54:21,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 14:54:21,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 14:54:21,268 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 7 states. [2020-10-28 14:54:21,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:54:21,465 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2020-10-28 14:54:21,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 14:54:21,466 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 15 [2020-10-28 14:54:21,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:54:21,466 INFO L225 Difference]: With dead ends: 23 [2020-10-28 14:54:21,467 INFO L226 Difference]: Without dead ends: 17 [2020-10-28 14:54:21,467 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-28 14:54:21,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-10-28 14:54:21,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-10-28 14:54:21,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-10-28 14:54:21,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2020-10-28 14:54:21,474 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2020-10-28 14:54:21,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:54:21,474 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2020-10-28 14:54:21,474 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 14:54:21,475 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2020-10-28 14:54:21,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-28 14:54:21,475 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:54:21,475 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:54:21,476 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 14:54:21,476 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:54:21,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:54:21,477 INFO L82 PathProgramCache]: Analyzing trace with hash -914207849, now seen corresponding path program 4 times [2020-10-28 14:54:21,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:54:21,477 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [729543276] [2020-10-28 14:54:21,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:54:21,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:54:21,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:54:21,702 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:54:21,702 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-28 14:54:21,703 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:54:21,703 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 210 [2020-10-28 14:54:21,703 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:54:21,703 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:54:21,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 14:54:21,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:54:21,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 14:54:21,704 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:54:21,890 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:54:21,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:54:21,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:54:21,905 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:54:21,905 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:54:21,906 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:54:21,906 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-28 14:54:21,906 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:54:21,906 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:54:21,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:54:21,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:54:21,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:54:21,909 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 14:54:21,916 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:54:21,917 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [729543276] [2020-10-28 14:54:21,920 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:54:21,920 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 14:54:21,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380947587] [2020-10-28 14:54:21,921 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 14:54:21,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:54:21,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 14:54:21,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-28 14:54:21,924 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 8 states. [2020-10-28 14:54:22,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:54:22,199 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2020-10-28 14:54:22,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 14:54:22,199 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 16 [2020-10-28 14:54:22,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:54:22,200 INFO L225 Difference]: With dead ends: 24 [2020-10-28 14:54:22,200 INFO L226 Difference]: Without dead ends: 18 [2020-10-28 14:54:22,201 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-28 14:54:22,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-10-28 14:54:22,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-10-28 14:54:22,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-10-28 14:54:22,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2020-10-28 14:54:22,207 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 16 [2020-10-28 14:54:22,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:54:22,208 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2020-10-28 14:54:22,208 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 14:54:22,208 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2020-10-28 14:54:22,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-28 14:54:22,208 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:54:22,209 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:54:22,209 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 14:54:22,209 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:54:22,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:54:22,210 INFO L82 PathProgramCache]: Analyzing trace with hash -1440351426, now seen corresponding path program 5 times [2020-10-28 14:54:22,210 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:54:22,210 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1944746070] [2020-10-28 14:54:22,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:54:22,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:54:22,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:54:22,427 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:54:22,427 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-28 14:54:22,428 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:54:22,428 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 205 [2020-10-28 14:54:22,428 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:54:22,428 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:54:22,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 14:54:22,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:54:22,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-28 14:54:22,429 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:54:22,549 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:54:22,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:54:22,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:54:22,557 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:54:22,558 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:54:22,558 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:54:22,558 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 14:54:22,558 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:54:22,559 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:54:22,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:54:22,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:54:22,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:54:22,559 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:54:22,563 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:54:22,564 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1944746070] [2020-10-28 14:54:22,564 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:54:22,564 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-28 14:54:22,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344969351] [2020-10-28 14:54:22,565 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 14:54:22,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:54:22,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 14:54:22,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-10-28 14:54:22,566 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 9 states. [2020-10-28 14:54:22,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:54:22,881 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2020-10-28 14:54:22,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 14:54:22,882 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 17 [2020-10-28 14:54:22,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:54:22,883 INFO L225 Difference]: With dead ends: 25 [2020-10-28 14:54:22,883 INFO L226 Difference]: Without dead ends: 19 [2020-10-28 14:54:22,884 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-28 14:54:22,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-10-28 14:54:22,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-10-28 14:54:22,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-28 14:54:22,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2020-10-28 14:54:22,891 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 17 [2020-10-28 14:54:22,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:54:22,891 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2020-10-28 14:54:22,891 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 14:54:22,891 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2020-10-28 14:54:22,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-28 14:54:22,892 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:54:22,892 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:54:22,892 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 14:54:22,893 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:54:22,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:54:22,893 INFO L82 PathProgramCache]: Analyzing trace with hash -570933129, now seen corresponding path program 6 times [2020-10-28 14:54:22,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:54:22,894 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1817689663] [2020-10-28 14:54:22,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:54:22,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:54:22,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:54:23,116 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:54:23,116 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-28 14:54:23,116 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:54:23,117 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 210 [2020-10-28 14:54:23,117 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:54:23,117 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:54:23,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 14:54:23,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:54:23,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-28 14:54:23,118 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:54:23,276 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:54:23,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:54:23,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:54:23,301 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:54:23,301 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:54:23,301 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:54:23,302 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-28 14:54:23,302 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:54:23,302 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:54:23,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:54:23,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:54:23,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:54:23,303 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:54:23,308 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:54:23,308 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1817689663] [2020-10-28 14:54:23,308 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:54:23,308 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 14:54:23,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413668578] [2020-10-28 14:54:23,313 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 14:54:23,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:54:23,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 14:54:23,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-28 14:54:23,315 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 10 states. [2020-10-28 14:54:23,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:54:23,755 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2020-10-28 14:54:23,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 14:54:23,756 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2020-10-28 14:54:23,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:54:23,757 INFO L225 Difference]: With dead ends: 26 [2020-10-28 14:54:23,757 INFO L226 Difference]: Without dead ends: 20 [2020-10-28 14:54:23,759 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-10-28 14:54:23,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-10-28 14:54:23,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-10-28 14:54:23,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-28 14:54:23,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2020-10-28 14:54:23,767 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 18 [2020-10-28 14:54:23,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:54:23,767 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2020-10-28 14:54:23,767 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 14:54:23,767 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2020-10-28 14:54:23,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-28 14:54:23,768 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:54:23,768 INFO L422 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:54:23,768 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 14:54:23,769 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:54:23,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:54:23,769 INFO L82 PathProgramCache]: Analyzing trace with hash 611230302, now seen corresponding path program 7 times [2020-10-28 14:54:23,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:54:23,770 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [922290102] [2020-10-28 14:54:23,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:54:23,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:54:23,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:54:23,980 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:54:23,980 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-28 14:54:23,980 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:54:23,981 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 195 [2020-10-28 14:54:23,981 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:54:23,981 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:54:23,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 14:54:23,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:54:23,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-28 14:54:23,982 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:54:24,145 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:54:24,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:54:24,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:54:24,152 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:54:24,152 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:54:24,152 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:54:24,153 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:54:24,153 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:54:24,153 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:54:24,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:54:24,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:54:24,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:54:24,154 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:54:24,183 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:54:24,184 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [922290102] [2020-10-28 14:54:24,184 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:54:24,184 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 14:54:24,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298321945] [2020-10-28 14:54:24,185 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 14:54:24,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:54:24,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 14:54:24,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-28 14:54:24,186 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 11 states. [2020-10-28 14:54:24,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:54:24,660 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2020-10-28 14:54:24,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 14:54:24,661 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2020-10-28 14:54:24,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:54:24,661 INFO L225 Difference]: With dead ends: 27 [2020-10-28 14:54:24,661 INFO L226 Difference]: Without dead ends: 21 [2020-10-28 14:54:24,662 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2020-10-28 14:54:24,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-10-28 14:54:24,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-10-28 14:54:24,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-28 14:54:24,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2020-10-28 14:54:24,675 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 19 [2020-10-28 14:54:24,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:54:24,675 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2020-10-28 14:54:24,675 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 14:54:24,675 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2020-10-28 14:54:24,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-28 14:54:24,677 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:54:24,678 INFO L422 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:54:24,678 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 14:54:24,678 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:54:24,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:54:24,678 INFO L82 PathProgramCache]: Analyzing trace with hash -1396409001, now seen corresponding path program 8 times [2020-10-28 14:54:24,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:54:24,680 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1469239573] [2020-10-28 14:54:24,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:54:24,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:54:24,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:54:24,944 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:54:24,944 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-28 14:54:24,944 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:54:24,944 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 241 [2020-10-28 14:54:24,944 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:54:24,945 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:54:24,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 14:54:24,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:54:24,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-28 14:54:24,945 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:54:25,168 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:54:25,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:54:25,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:54:25,178 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:54:25,178 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:54:25,178 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:54:25,178 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:54:25,179 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:54:25,179 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:54:25,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:54:25,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:54:25,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:54:25,179 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:54:25,185 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:54:25,185 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1469239573] [2020-10-28 14:54:25,185 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:54:25,186 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 14:54:25,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287625244] [2020-10-28 14:54:25,186 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 14:54:25,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:54:25,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 14:54:25,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-10-28 14:54:25,190 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 12 states. [2020-10-28 14:54:25,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:54:25,685 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2020-10-28 14:54:25,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 14:54:25,685 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 20 [2020-10-28 14:54:25,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:54:25,686 INFO L225 Difference]: With dead ends: 28 [2020-10-28 14:54:25,686 INFO L226 Difference]: Without dead ends: 22 [2020-10-28 14:54:25,687 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2020-10-28 14:54:25,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-10-28 14:54:25,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-10-28 14:54:25,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-28 14:54:25,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2020-10-28 14:54:25,694 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 20 [2020-10-28 14:54:25,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:54:25,694 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2020-10-28 14:54:25,695 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 14:54:25,695 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2020-10-28 14:54:25,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-28 14:54:25,695 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:54:25,695 INFO L422 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:54:25,696 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 14:54:25,696 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:54:25,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:54:25,696 INFO L82 PathProgramCache]: Analyzing trace with hash 791282046, now seen corresponding path program 9 times [2020-10-28 14:54:25,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:54:25,697 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1278068468] [2020-10-28 14:54:25,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:54:25,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:54:25,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:54:26,027 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:54:26,027 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-28 14:54:26,027 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:54:26,027 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 314 [2020-10-28 14:54:26,028 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:54:26,028 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:54:26,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 14:54:26,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:54:26,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-28 14:54:26,029 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:54:26,229 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:54:26,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:54:26,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:54:26,243 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:54:26,243 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:54:26,243 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:54:26,243 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 14:54:26,244 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:54:26,244 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:54:26,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:54:26,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:54:26,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:54:26,245 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:54:26,249 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:54:26,249 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1278068468] [2020-10-28 14:54:26,249 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:54:26,249 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 14:54:26,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459913833] [2020-10-28 14:54:26,251 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 14:54:26,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:54:26,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 14:54:26,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-10-28 14:54:26,252 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 13 states. [2020-10-28 14:54:26,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:54:26,853 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2020-10-28 14:54:26,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 14:54:26,854 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 21 [2020-10-28 14:54:26,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:54:26,855 INFO L225 Difference]: With dead ends: 29 [2020-10-28 14:54:26,856 INFO L226 Difference]: Without dead ends: 23 [2020-10-28 14:54:26,857 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2020-10-28 14:54:26,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-10-28 14:54:26,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-10-28 14:54:26,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-28 14:54:26,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2020-10-28 14:54:26,864 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 21 [2020-10-28 14:54:26,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:54:26,864 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2020-10-28 14:54:26,864 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 14:54:26,864 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2020-10-28 14:54:26,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-28 14:54:26,865 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:54:26,865 INFO L422 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:54:26,865 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 14:54:26,865 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:54:26,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:54:26,866 INFO L82 PathProgramCache]: Analyzing trace with hash -109772233, now seen corresponding path program 10 times [2020-10-28 14:54:26,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:54:26,866 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [785610506] [2020-10-28 14:54:26,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:54:26,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:54:26,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:54:27,157 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:54:27,158 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-28 14:54:27,158 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:54:27,158 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 278 [2020-10-28 14:54:27,158 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:54:27,159 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:54:27,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 14:54:27,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:54:27,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-28 14:54:27,159 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:54:27,379 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:54:27,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:54:27,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:54:27,386 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:54:27,387 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:54:27,387 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:54:27,387 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:54:27,387 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:54:27,387 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:54:27,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:54:27,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:54:27,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:54:27,388 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:54:27,392 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:54:27,392 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [785610506] [2020-10-28 14:54:27,393 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:54:27,393 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 14:54:27,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340446248] [2020-10-28 14:54:27,394 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 14:54:27,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:54:27,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 14:54:27,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2020-10-28 14:54:27,395 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 14 states. [2020-10-28 14:54:28,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:54:28,108 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2020-10-28 14:54:28,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 14:54:28,109 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 22 [2020-10-28 14:54:28,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:54:28,110 INFO L225 Difference]: With dead ends: 30 [2020-10-28 14:54:28,111 INFO L226 Difference]: Without dead ends: 24 [2020-10-28 14:54:28,112 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=99, Invalid=501, Unknown=0, NotChecked=0, Total=600 [2020-10-28 14:54:28,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-10-28 14:54:28,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-10-28 14:54:28,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-28 14:54:28,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2020-10-28 14:54:28,120 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 22 [2020-10-28 14:54:28,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:54:28,120 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2020-10-28 14:54:28,120 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 14:54:28,120 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2020-10-28 14:54:28,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-28 14:54:28,121 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:54:28,121 INFO L422 BasicCegarLoop]: trace histogram [11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:54:28,122 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 14:54:28,122 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:54:28,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:54:28,122 INFO L82 PathProgramCache]: Analyzing trace with hash 2022316190, now seen corresponding path program 11 times [2020-10-28 14:54:28,123 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:54:28,123 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [966368623] [2020-10-28 14:54:28,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:54:28,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:54:28,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:54:28,498 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:54:28,498 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-28 14:54:28,499 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:54:28,499 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 359 [2020-10-28 14:54:28,499 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:54:28,499 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:54:28,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-28 14:54:28,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:54:28,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-28 14:54:28,500 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:54:28,780 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:54:28,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:54:28,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:54:28,791 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:54:28,791 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:54:28,791 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:54:28,792 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 14:54:28,792 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:54:28,792 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:54:28,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:54:28,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:54:28,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:54:28,793 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:54:28,798 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:54:28,799 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [966368623] [2020-10-28 14:54:28,799 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:54:28,799 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-28 14:54:28,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568734720] [2020-10-28 14:54:28,800 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-28 14:54:28,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:54:28,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-28 14:54:28,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2020-10-28 14:54:28,802 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 15 states. [2020-10-28 14:54:29,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:54:29,579 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2020-10-28 14:54:29,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-28 14:54:29,579 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 23 [2020-10-28 14:54:29,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:54:29,580 INFO L225 Difference]: With dead ends: 31 [2020-10-28 14:54:29,580 INFO L226 Difference]: Without dead ends: 25 [2020-10-28 14:54:29,581 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=108, Invalid=594, Unknown=0, NotChecked=0, Total=702 [2020-10-28 14:54:29,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-10-28 14:54:29,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-10-28 14:54:29,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-28 14:54:29,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2020-10-28 14:54:29,593 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 23 [2020-10-28 14:54:29,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:54:29,593 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2020-10-28 14:54:29,594 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-28 14:54:29,594 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2020-10-28 14:54:29,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-28 14:54:29,599 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:54:29,599 INFO L422 BasicCegarLoop]: trace histogram [12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:54:29,599 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-28 14:54:29,599 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:54:29,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:54:29,600 INFO L82 PathProgramCache]: Analyzing trace with hash -602419433, now seen corresponding path program 12 times [2020-10-28 14:54:29,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:54:29,603 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1092623506] [2020-10-28 14:54:29,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:54:29,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:54:29,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:54:30,010 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:54:30,010 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-28 14:54:30,010 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:54:30,010 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 389 [2020-10-28 14:54:30,011 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:54:30,011 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:54:30,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 14:54:30,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:54:30,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-28 14:54:30,011 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:54:30,295 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:54:30,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:54:30,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:54:30,302 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:54:30,303 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:54:30,303 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:54:30,303 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:54:30,303 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:54:30,303 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:54:30,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:54:30,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:54:30,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:54:30,304 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:54:30,310 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:54:30,311 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1092623506] [2020-10-28 14:54:30,311 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:54:30,311 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-28 14:54:30,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531308598] [2020-10-28 14:54:30,312 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-28 14:54:30,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:54:30,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-28 14:54:30,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2020-10-28 14:54:30,313 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 16 states. [2020-10-28 14:54:31,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:54:31,151 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2020-10-28 14:54:31,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-28 14:54:31,151 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 24 [2020-10-28 14:54:31,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:54:31,152 INFO L225 Difference]: With dead ends: 32 [2020-10-28 14:54:31,152 INFO L226 Difference]: Without dead ends: 26 [2020-10-28 14:54:31,153 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=117, Invalid=695, Unknown=0, NotChecked=0, Total=812 [2020-10-28 14:54:31,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-10-28 14:54:31,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-10-28 14:54:31,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-28 14:54:31,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2020-10-28 14:54:31,169 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 24 [2020-10-28 14:54:31,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:54:31,170 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2020-10-28 14:54:31,170 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-28 14:54:31,170 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2020-10-28 14:54:31,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-28 14:54:31,170 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:54:31,171 INFO L422 BasicCegarLoop]: trace histogram [13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:54:31,171 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-28 14:54:31,171 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:54:31,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:54:31,172 INFO L82 PathProgramCache]: Analyzing trace with hash -364845122, now seen corresponding path program 13 times [2020-10-28 14:54:31,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:54:31,172 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [490669803] [2020-10-28 14:54:31,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:54:31,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:54:31,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:54:31,578 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:54:31,578 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-28 14:54:31,578 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:54:31,579 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 392 [2020-10-28 14:54:31,579 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:54:31,579 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:54:31,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-28 14:54:31,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:54:31,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-28 14:54:31,580 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:54:31,929 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:54:31,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:54:31,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:54:31,937 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:54:31,937 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:54:31,938 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:54:31,938 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:54:31,938 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:54:31,938 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:54:31,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:54:31,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:54:31,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:54:31,939 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:54:31,944 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:54:31,945 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [490669803] [2020-10-28 14:54:31,945 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:54:31,945 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-28 14:54:31,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245664592] [2020-10-28 14:54:31,946 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-28 14:54:31,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:54:31,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-28 14:54:31,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2020-10-28 14:54:31,948 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 17 states. [2020-10-28 14:54:32,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:54:32,868 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2020-10-28 14:54:32,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-28 14:54:32,869 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 25 [2020-10-28 14:54:32,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:54:32,870 INFO L225 Difference]: With dead ends: 33 [2020-10-28 14:54:32,870 INFO L226 Difference]: Without dead ends: 27 [2020-10-28 14:54:32,871 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=126, Invalid=804, Unknown=0, NotChecked=0, Total=930 [2020-10-28 14:54:32,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-28 14:54:32,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-10-28 14:54:32,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-28 14:54:32,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2020-10-28 14:54:32,879 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 25 [2020-10-28 14:54:32,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:54:32,879 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2020-10-28 14:54:32,879 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-28 14:54:32,880 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2020-10-28 14:54:32,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-28 14:54:32,880 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:54:32,880 INFO L422 BasicCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:54:32,880 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-28 14:54:32,881 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:54:32,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:54:32,881 INFO L82 PathProgramCache]: Analyzing trace with hash -1589976073, now seen corresponding path program 14 times [2020-10-28 14:54:32,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:54:32,881 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [753902623] [2020-10-28 14:54:32,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:54:32,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:54:32,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:54:33,354 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:54:33,355 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-28 14:54:33,355 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:54:33,355 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 460 [2020-10-28 14:54:33,355 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:54:33,355 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:54:33,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-28 14:54:33,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:54:33,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 14:54:33,356 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:54:33,679 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:54:33,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:54:33,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:54:33,687 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:54:33,687 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:54:33,687 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:54:33,688 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:54:33,688 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:54:33,688 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:54:33,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:54:33,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:54:33,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:54:33,688 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:54:33,694 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:54:33,694 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [753902623] [2020-10-28 14:54:33,696 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:54:33,696 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-28 14:54:33,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369077781] [2020-10-28 14:54:33,697 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-28 14:54:33,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:54:33,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-28 14:54:33,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2020-10-28 14:54:33,698 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 18 states. [2020-10-28 14:54:34,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:54:34,613 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2020-10-28 14:54:34,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-28 14:54:34,615 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 26 [2020-10-28 14:54:34,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:54:34,615 INFO L225 Difference]: With dead ends: 34 [2020-10-28 14:54:34,616 INFO L226 Difference]: Without dead ends: 28 [2020-10-28 14:54:34,617 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=135, Invalid=921, Unknown=0, NotChecked=0, Total=1056 [2020-10-28 14:54:34,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-28 14:54:34,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-10-28 14:54:34,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-28 14:54:34,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2020-10-28 14:54:34,628 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 26 [2020-10-28 14:54:34,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:54:34,629 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2020-10-28 14:54:34,629 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-28 14:54:34,629 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2020-10-28 14:54:34,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-28 14:54:34,630 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:54:34,630 INFO L422 BasicCegarLoop]: trace histogram [15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:54:34,630 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-28 14:54:34,633 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:54:34,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:54:34,634 INFO L82 PathProgramCache]: Analyzing trace with hash -914329890, now seen corresponding path program 15 times [2020-10-28 14:54:34,634 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:54:34,634 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2099279479] [2020-10-28 14:54:34,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:54:34,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:54:34,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:54:35,107 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:54:35,107 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-28 14:54:35,107 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:54:35,107 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 455 [2020-10-28 14:54:35,107 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:54:35,108 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:54:35,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-28 14:54:35,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:54:35,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-28 14:54:35,108 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:54:35,482 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:54:35,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:54:35,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:54:35,490 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:54:35,490 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:54:35,490 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:54:35,490 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:54:35,491 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:54:35,491 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:54:35,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:54:35,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:54:35,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:54:35,491 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:54:35,496 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:54:35,496 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2099279479] [2020-10-28 14:54:35,497 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:54:35,497 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-28 14:54:35,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640222314] [2020-10-28 14:54:35,497 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-28 14:54:35,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:54:35,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-28 14:54:35,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2020-10-28 14:54:35,499 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 19 states. [2020-10-28 14:54:36,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:54:36,536 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2020-10-28 14:54:36,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-28 14:54:36,536 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 27 [2020-10-28 14:54:36,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:54:36,537 INFO L225 Difference]: With dead ends: 35 [2020-10-28 14:54:36,537 INFO L226 Difference]: Without dead ends: 29 [2020-10-28 14:54:36,538 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=144, Invalid=1046, Unknown=0, NotChecked=0, Total=1190 [2020-10-28 14:54:36,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-28 14:54:36,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-10-28 14:54:36,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-28 14:54:36,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2020-10-28 14:54:36,553 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 27 [2020-10-28 14:54:36,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:54:36,554 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2020-10-28 14:54:36,554 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-28 14:54:36,554 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2020-10-28 14:54:36,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-28 14:54:36,554 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:54:36,555 INFO L422 BasicCegarLoop]: trace histogram [16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:54:36,555 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-28 14:54:36,558 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:54:36,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:54:36,559 INFO L82 PathProgramCache]: Analyzing trace with hash -1444134697, now seen corresponding path program 16 times [2020-10-28 14:54:36,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:54:36,559 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1349243912] [2020-10-28 14:54:36,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:54:36,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:54:36,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:54:37,211 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:54:37,211 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-28 14:54:37,212 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:54:37,212 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 616 [2020-10-28 14:54:37,212 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:54:37,212 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:54:37,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-28 14:54:37,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:54:37,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-28 14:54:37,213 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:54:37,592 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:54:37,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:54:37,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:54:37,598 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:54:37,599 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:54:37,599 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:54:37,599 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:54:37,599 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:54:37,599 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:54:37,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:54:37,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:54:37,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:54:37,600 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:54:37,605 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:54:37,605 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1349243912] [2020-10-28 14:54:37,605 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:54:37,605 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-28 14:54:37,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036023113] [2020-10-28 14:54:37,608 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-28 14:54:37,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:54:37,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-28 14:54:37,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2020-10-28 14:54:37,614 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 20 states. [2020-10-28 14:54:38,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:54:38,766 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2020-10-28 14:54:38,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-28 14:54:38,767 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 28 [2020-10-28 14:54:38,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:54:38,768 INFO L225 Difference]: With dead ends: 36 [2020-10-28 14:54:38,768 INFO L226 Difference]: Without dead ends: 30 [2020-10-28 14:54:38,770 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=153, Invalid=1179, Unknown=0, NotChecked=0, Total=1332 [2020-10-28 14:54:38,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-28 14:54:38,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-10-28 14:54:38,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-28 14:54:38,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2020-10-28 14:54:38,777 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 28 [2020-10-28 14:54:38,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:54:38,777 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2020-10-28 14:54:38,777 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-28 14:54:38,778 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2020-10-28 14:54:38,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-28 14:54:38,778 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:54:38,778 INFO L422 BasicCegarLoop]: trace histogram [17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:54:38,778 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-28 14:54:38,779 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:54:38,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:54:38,779 INFO L82 PathProgramCache]: Analyzing trace with hash -688214530, now seen corresponding path program 17 times [2020-10-28 14:54:38,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:54:38,780 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [49491001] [2020-10-28 14:54:38,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:54:38,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:54:38,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:54:39,317 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:54:39,317 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-28 14:54:39,317 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:54:39,317 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 521 [2020-10-28 14:54:39,318 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:54:39,318 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:54:39,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-28 14:54:39,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:54:39,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-28 14:54:39,318 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:54:39,736 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:54:39,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:54:39,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:54:39,745 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:54:39,745 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:54:39,745 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:54:39,745 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 14:54:39,745 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:54:39,746 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:54:39,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:54:39,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:54:39,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:54:39,746 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:54:39,754 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:54:39,754 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [49491001] [2020-10-28 14:54:39,754 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:54:39,754 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-28 14:54:39,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784177154] [2020-10-28 14:54:39,755 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-28 14:54:39,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:54:39,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-28 14:54:39,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2020-10-28 14:54:39,757 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 21 states. [2020-10-28 14:54:40,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:54:40,990 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2020-10-28 14:54:40,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-28 14:54:40,991 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 29 [2020-10-28 14:54:40,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:54:40,992 INFO L225 Difference]: With dead ends: 37 [2020-10-28 14:54:40,992 INFO L226 Difference]: Without dead ends: 31 [2020-10-28 14:54:40,993 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=162, Invalid=1320, Unknown=0, NotChecked=0, Total=1482 [2020-10-28 14:54:40,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-28 14:54:41,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-10-28 14:54:41,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-28 14:54:41,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2020-10-28 14:54:41,001 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 29 [2020-10-28 14:54:41,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:54:41,001 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2020-10-28 14:54:41,001 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-28 14:54:41,001 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2020-10-28 14:54:41,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-28 14:54:41,002 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:54:41,002 INFO L422 BasicCegarLoop]: trace histogram [18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:54:41,002 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-28 14:54:41,002 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:54:41,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:54:41,003 INFO L82 PathProgramCache]: Analyzing trace with hash 1270474167, now seen corresponding path program 18 times [2020-10-28 14:54:41,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:54:41,003 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [112259599] [2020-10-28 14:54:41,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:54:41,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:54:41,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:54:41,633 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:54:41,634 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-28 14:54:41,634 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:54:41,634 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 615 [2020-10-28 14:54:41,634 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:54:41,634 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:54:41,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-28 14:54:41,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:54:41,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-28 14:54:41,635 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:54:42,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:54:42,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:54:42,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:54:42,059 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:54:42,059 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:54:42,059 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:54:42,060 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 14:54:42,060 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:54:42,060 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:54:42,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:54:42,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:54:42,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:54:42,061 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:54:42,066 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:54:42,067 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [112259599] [2020-10-28 14:54:42,067 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:54:42,067 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-28 14:54:42,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447887189] [2020-10-28 14:54:42,069 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-28 14:54:42,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:54:42,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-28 14:54:42,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2020-10-28 14:54:42,071 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 22 states. [2020-10-28 14:54:43,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:54:43,439 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2020-10-28 14:54:43,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-28 14:54:43,440 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 30 [2020-10-28 14:54:43,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:54:43,441 INFO L225 Difference]: With dead ends: 38 [2020-10-28 14:54:43,441 INFO L226 Difference]: Without dead ends: 32 [2020-10-28 14:54:43,442 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=171, Invalid=1469, Unknown=0, NotChecked=0, Total=1640 [2020-10-28 14:54:43,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-28 14:54:43,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2020-10-28 14:54:43,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-28 14:54:43,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2020-10-28 14:54:43,451 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 30 [2020-10-28 14:54:43,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:54:43,451 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2020-10-28 14:54:43,451 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-28 14:54:43,451 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2020-10-28 14:54:43,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-28 14:54:43,452 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:54:43,452 INFO L422 BasicCegarLoop]: trace histogram [19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:54:43,453 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-28 14:54:43,453 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:54:43,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:54:43,454 INFO L82 PathProgramCache]: Analyzing trace with hash 1860281630, now seen corresponding path program 19 times [2020-10-28 14:54:43,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:54:43,454 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1396716511] [2020-10-28 14:54:43,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:54:43,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:54:43,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:54:44,102 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:54:44,102 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-28 14:54:44,103 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:54:44,103 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 631 [2020-10-28 14:54:44,103 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:54:44,103 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:54:44,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-28 14:54:44,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:54:44,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-28 14:54:44,104 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:54:44,660 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:54:44,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:54:44,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:54:44,667 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:54:44,668 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:54:44,668 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:54:44,668 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:54:44,668 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:54:44,669 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:54:44,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:54:44,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:54:44,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:54:44,669 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:54:44,675 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:54:44,676 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1396716511] [2020-10-28 14:54:44,676 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:54:44,676 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-28 14:54:44,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625196222] [2020-10-28 14:54:44,677 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-28 14:54:44,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:54:44,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-28 14:54:44,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2020-10-28 14:54:44,678 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 23 states. [2020-10-28 14:54:46,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:54:46,010 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2020-10-28 14:54:46,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-28 14:54:46,011 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 31 [2020-10-28 14:54:46,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:54:46,012 INFO L225 Difference]: With dead ends: 39 [2020-10-28 14:54:46,012 INFO L226 Difference]: Without dead ends: 33 [2020-10-28 14:54:46,014 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=180, Invalid=1626, Unknown=0, NotChecked=0, Total=1806 [2020-10-28 14:54:46,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-28 14:54:46,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-10-28 14:54:46,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-28 14:54:46,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2020-10-28 14:54:46,022 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 31 [2020-10-28 14:54:46,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:54:46,022 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2020-10-28 14:54:46,022 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-28 14:54:46,022 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2020-10-28 14:54:46,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-28 14:54:46,023 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:54:46,023 INFO L422 BasicCegarLoop]: trace histogram [20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:54:46,023 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-28 14:54:46,023 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:54:46,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:54:46,024 INFO L82 PathProgramCache]: Analyzing trace with hash -1330523497, now seen corresponding path program 20 times [2020-10-28 14:54:46,024 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:54:46,024 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [748343574] [2020-10-28 14:54:46,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:54:46,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:54:46,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:54:46,810 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:54:46,810 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-28 14:54:46,810 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:54:46,810 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 770 [2020-10-28 14:54:46,810 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:54:46,811 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:54:46,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-28 14:54:46,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:54:46,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-28 14:54:46,811 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:54:47,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:54:47,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:54:47,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:54:47,356 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:54:47,356 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:54:47,356 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:54:47,357 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:54:47,357 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:54:47,357 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:54:47,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:54:47,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:54:47,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:54:47,358 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:54:47,364 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:54:47,365 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [748343574] [2020-10-28 14:54:47,365 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:54:47,365 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-28 14:54:47,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779368442] [2020-10-28 14:54:47,366 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-28 14:54:47,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:54:47,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-28 14:54:47,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2020-10-28 14:54:47,367 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 24 states. [2020-10-28 14:54:48,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:54:48,944 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2020-10-28 14:54:48,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-28 14:54:48,948 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 32 [2020-10-28 14:54:48,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:54:48,949 INFO L225 Difference]: With dead ends: 40 [2020-10-28 14:54:48,949 INFO L226 Difference]: Without dead ends: 34 [2020-10-28 14:54:48,951 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=189, Invalid=1791, Unknown=0, NotChecked=0, Total=1980 [2020-10-28 14:54:48,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-28 14:54:48,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2020-10-28 14:54:48,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-28 14:54:48,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2020-10-28 14:54:48,957 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 32 [2020-10-28 14:54:48,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:54:48,958 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2020-10-28 14:54:48,958 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-28 14:54:48,958 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2020-10-28 14:54:48,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-28 14:54:48,958 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:54:48,958 INFO L422 BasicCegarLoop]: trace histogram [21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:54:48,959 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-28 14:54:48,959 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:54:48,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:54:48,959 INFO L82 PathProgramCache]: Analyzing trace with hash -1461234626, now seen corresponding path program 21 times [2020-10-28 14:54:48,960 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:54:48,960 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [155845232] [2020-10-28 14:54:48,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:54:48,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:54:48,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:54:49,758 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:54:49,758 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-28 14:54:49,758 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:54:49,759 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 778 [2020-10-28 14:54:49,759 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:54:49,759 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:54:49,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-28 14:54:49,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:54:49,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-28 14:54:49,760 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:54:50,361 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:54:50,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:54:50,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:54:50,372 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:54:50,373 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:54:50,373 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:54:50,373 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 14:54:50,373 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:54:50,373 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:54:50,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:54:50,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:54:50,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:54:50,374 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:54:50,378 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:54:50,378 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [155845232] [2020-10-28 14:54:50,378 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:54:50,379 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-28 14:54:50,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608216382] [2020-10-28 14:54:50,379 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-28 14:54:50,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:54:50,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-28 14:54:50,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2020-10-28 14:54:50,380 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 25 states. [2020-10-28 14:54:52,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:54:52,150 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2020-10-28 14:54:52,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-28 14:54:52,153 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 33 [2020-10-28 14:54:52,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:54:52,154 INFO L225 Difference]: With dead ends: 41 [2020-10-28 14:54:52,154 INFO L226 Difference]: Without dead ends: 35 [2020-10-28 14:54:52,155 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=198, Invalid=1964, Unknown=0, NotChecked=0, Total=2162 [2020-10-28 14:54:52,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-28 14:54:52,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2020-10-28 14:54:52,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-28 14:54:52,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2020-10-28 14:54:52,161 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 33 [2020-10-28 14:54:52,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:54:52,162 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2020-10-28 14:54:52,162 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-28 14:54:52,162 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2020-10-28 14:54:52,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-28 14:54:52,162 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:54:52,163 INFO L422 BasicCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:54:52,163 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-28 14:54:52,163 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:54:52,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:54:52,164 INFO L82 PathProgramCache]: Analyzing trace with hash -1218312329, now seen corresponding path program 22 times [2020-10-28 14:54:52,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:54:52,164 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [213984521] [2020-10-28 14:54:52,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:54:52,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:54:52,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:54:52,915 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:54:52,916 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-28 14:54:52,916 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:54:52,916 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 735 [2020-10-28 14:54:52,916 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:54:52,916 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:54:52,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-28 14:54:52,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:54:52,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-28 14:54:52,917 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:54:53,547 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:54:53,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:54:53,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:54:53,553 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:54:53,554 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:54:53,554 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:54:53,554 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:54:53,554 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:54:53,554 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:54:53,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:54:53,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:54:53,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:54:53,555 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:54:53,560 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:54:53,560 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [213984521] [2020-10-28 14:54:53,561 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:54:53,561 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-28 14:54:53,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635036277] [2020-10-28 14:54:53,561 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-28 14:54:53,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:54:53,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-28 14:54:53,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=579, Unknown=0, NotChecked=0, Total=650 [2020-10-28 14:54:53,562 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 26 states. [2020-10-28 14:54:55,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:54:55,351 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2020-10-28 14:54:55,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-28 14:54:55,352 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 34 [2020-10-28 14:54:55,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:54:55,352 INFO L225 Difference]: With dead ends: 42 [2020-10-28 14:54:55,352 INFO L226 Difference]: Without dead ends: 36 [2020-10-28 14:54:55,353 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=207, Invalid=2145, Unknown=0, NotChecked=0, Total=2352 [2020-10-28 14:54:55,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-28 14:54:55,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-10-28 14:54:55,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-28 14:54:55,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2020-10-28 14:54:55,360 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 34 [2020-10-28 14:54:55,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:54:55,361 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2020-10-28 14:54:55,361 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-28 14:54:55,361 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2020-10-28 14:54:55,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-28 14:54:55,361 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:54:55,361 INFO L422 BasicCegarLoop]: trace histogram [23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:54:55,362 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-28 14:54:55,362 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:54:55,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:54:55,362 INFO L82 PathProgramCache]: Analyzing trace with hash 2017311582, now seen corresponding path program 23 times [2020-10-28 14:54:55,362 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:54:55,363 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [113518548] [2020-10-28 14:54:55,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:54:55,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:54:55,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:54:56,232 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:54:56,232 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-28 14:54:56,232 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:54:56,233 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 840 [2020-10-28 14:54:56,233 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:54:56,233 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:54:56,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-28 14:54:56,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:54:56,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-28 14:54:56,234 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:54:56,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:54:56,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:54:56,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:54:56,967 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:54:56,967 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:54:56,967 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:54:56,967 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:54:56,967 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:54:56,968 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:54:56,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:54:56,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:54:56,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:54:56,968 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:54:56,973 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:54:56,974 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [113518548] [2020-10-28 14:54:56,974 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:54:56,974 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-28 14:54:56,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863844691] [2020-10-28 14:54:56,975 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-28 14:54:56,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:54:56,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-28 14:54:56,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=628, Unknown=0, NotChecked=0, Total=702 [2020-10-28 14:54:56,976 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 27 states. [2020-10-28 14:54:58,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:54:58,956 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2020-10-28 14:54:58,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-28 14:54:58,957 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 35 [2020-10-28 14:54:58,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:54:58,958 INFO L225 Difference]: With dead ends: 43 [2020-10-28 14:54:58,958 INFO L226 Difference]: Without dead ends: 37 [2020-10-28 14:54:58,960 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=216, Invalid=2334, Unknown=0, NotChecked=0, Total=2550 [2020-10-28 14:54:58,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-28 14:54:58,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-10-28 14:54:58,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-28 14:54:58,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2020-10-28 14:54:58,967 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 35 [2020-10-28 14:54:58,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:54:58,967 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2020-10-28 14:54:58,967 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-28 14:54:58,967 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2020-10-28 14:54:58,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-28 14:54:58,968 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:54:58,968 INFO L422 BasicCegarLoop]: trace histogram [24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:54:58,968 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-28 14:54:58,968 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:54:58,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:54:58,969 INFO L82 PathProgramCache]: Analyzing trace with hash -757562281, now seen corresponding path program 24 times [2020-10-28 14:54:58,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:54:58,969 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2002617161] [2020-10-28 14:54:58,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:54:58,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:54:58,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:54:59,945 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:54:59,945 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-28 14:54:59,945 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:54:59,946 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 960 [2020-10-28 14:54:59,946 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:54:59,946 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:54:59,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-28 14:54:59,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:54:59,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-28 14:54:59,946 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:55:00,704 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:55:00,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:55:00,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:55:00,710 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:55:00,710 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:55:00,710 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:55:00,710 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:55:00,710 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:55:00,711 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:55:00,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:55:00,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:55:00,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:55:00,711 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:55:00,717 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:55:00,717 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2002617161] [2020-10-28 14:55:00,717 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:55:00,718 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-28 14:55:00,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750588746] [2020-10-28 14:55:00,718 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-28 14:55:00,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:55:00,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-28 14:55:00,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=679, Unknown=0, NotChecked=0, Total=756 [2020-10-28 14:55:00,719 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 28 states. [2020-10-28 14:55:02,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:55:02,765 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2020-10-28 14:55:02,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-28 14:55:02,766 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 36 [2020-10-28 14:55:02,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:55:02,766 INFO L225 Difference]: With dead ends: 44 [2020-10-28 14:55:02,767 INFO L226 Difference]: Without dead ends: 38 [2020-10-28 14:55:02,768 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=225, Invalid=2531, Unknown=0, NotChecked=0, Total=2756 [2020-10-28 14:55:02,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-28 14:55:02,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2020-10-28 14:55:02,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-28 14:55:02,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2020-10-28 14:55:02,776 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 36 [2020-10-28 14:55:02,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:55:02,776 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2020-10-28 14:55:02,776 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-28 14:55:02,777 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2020-10-28 14:55:02,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-28 14:55:02,777 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:55:02,777 INFO L422 BasicCegarLoop]: trace histogram [25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:55:02,777 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-28 14:55:02,778 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:55:02,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:55:02,778 INFO L82 PathProgramCache]: Analyzing trace with hash -879306114, now seen corresponding path program 25 times [2020-10-28 14:55:02,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:55:02,778 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1700542214] [2020-10-28 14:55:02,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:55:02,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:55:02,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:55:03,777 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:55:03,777 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-28 14:55:03,777 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:55:03,778 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 986 [2020-10-28 14:55:03,778 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:55:03,778 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:55:03,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-28 14:55:03,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:55:03,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-28 14:55:03,778 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:55:04,579 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:55:04,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:55:04,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:55:04,584 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:55:04,584 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:55:04,584 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:55:04,585 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:55:04,585 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:55:04,585 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:55:04,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:55:04,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:55:04,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:55:04,585 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:55:04,589 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:55:04,589 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1700542214] [2020-10-28 14:55:04,590 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:55:04,590 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-28 14:55:04,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035693759] [2020-10-28 14:55:04,590 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-28 14:55:04,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:55:04,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-28 14:55:04,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=732, Unknown=0, NotChecked=0, Total=812 [2020-10-28 14:55:04,591 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 29 states. [2020-10-28 14:55:06,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:55:06,765 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2020-10-28 14:55:06,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-28 14:55:06,766 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 37 [2020-10-28 14:55:06,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:55:06,767 INFO L225 Difference]: With dead ends: 45 [2020-10-28 14:55:06,767 INFO L226 Difference]: Without dead ends: 39 [2020-10-28 14:55:06,769 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=234, Invalid=2736, Unknown=0, NotChecked=0, Total=2970 [2020-10-28 14:55:06,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-28 14:55:06,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-10-28 14:55:06,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-28 14:55:06,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2020-10-28 14:55:06,777 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 37 [2020-10-28 14:55:06,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:55:06,777 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2020-10-28 14:55:06,777 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-28 14:55:06,777 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2020-10-28 14:55:06,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-28 14:55:06,777 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:55:06,778 INFO L422 BasicCegarLoop]: trace histogram [26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:55:06,778 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-28 14:55:06,778 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:55:06,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:55:06,778 INFO L82 PathProgramCache]: Analyzing trace with hash -358397641, now seen corresponding path program 26 times [2020-10-28 14:55:06,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:55:06,779 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1796938641] [2020-10-28 14:55:06,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:55:06,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:55:06,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:55:07,791 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:55:07,792 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-28 14:55:07,792 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:55:07,792 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 997 [2020-10-28 14:55:07,792 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:55:07,792 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:55:07,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-28 14:55:07,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:55:07,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-28 14:55:07,793 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:55:08,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:55:08,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:55:08,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:55:08,655 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:55:08,655 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:55:08,655 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:55:08,655 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:55:08,655 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:55:08,655 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:55:08,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:55:08,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:55:08,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:55:08,656 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:55:08,660 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:55:08,661 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1796938641] [2020-10-28 14:55:08,661 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:55:08,661 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-28 14:55:08,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755330622] [2020-10-28 14:55:08,661 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-28 14:55:08,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:55:08,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-28 14:55:08,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=787, Unknown=0, NotChecked=0, Total=870 [2020-10-28 14:55:08,663 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 30 states. [2020-10-28 14:55:11,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:55:11,032 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2020-10-28 14:55:11,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-28 14:55:11,032 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 38 [2020-10-28 14:55:11,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:55:11,033 INFO L225 Difference]: With dead ends: 46 [2020-10-28 14:55:11,033 INFO L226 Difference]: Without dead ends: 40 [2020-10-28 14:55:11,035 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=243, Invalid=2949, Unknown=0, NotChecked=0, Total=3192 [2020-10-28 14:55:11,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-28 14:55:11,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2020-10-28 14:55:11,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-28 14:55:11,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2020-10-28 14:55:11,043 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 38 [2020-10-28 14:55:11,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:55:11,043 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2020-10-28 14:55:11,043 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-28 14:55:11,043 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2020-10-28 14:55:11,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-28 14:55:11,043 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:55:11,044 INFO L422 BasicCegarLoop]: trace histogram [27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:55:11,044 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-28 14:55:11,044 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:55:11,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:55:11,044 INFO L82 PathProgramCache]: Analyzing trace with hash -1390104162, now seen corresponding path program 27 times [2020-10-28 14:55:11,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:55:11,045 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [173528662] [2020-10-28 14:55:11,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:55:11,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:55:11,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:55:12,011 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:55:12,011 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-28 14:55:12,011 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:55:12,011 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 949 [2020-10-28 14:55:12,012 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:55:12,012 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:55:12,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-28 14:55:12,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:55:12,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-28 14:55:12,012 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:55:12,926 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:55:12,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:55:12,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:55:12,931 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:55:12,932 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:55:12,932 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:55:12,932 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:55:12,932 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:55:12,932 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:55:12,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:55:12,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:55:12,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:55:12,933 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:55:12,939 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:55:12,939 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [173528662] [2020-10-28 14:55:12,939 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:55:12,939 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-28 14:55:12,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839958995] [2020-10-28 14:55:12,940 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-28 14:55:12,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:55:12,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-28 14:55:12,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=844, Unknown=0, NotChecked=0, Total=930 [2020-10-28 14:55:12,941 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand 31 states. [2020-10-28 14:55:15,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:55:15,467 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2020-10-28 14:55:15,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-28 14:55:15,468 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 39 [2020-10-28 14:55:15,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:55:15,468 INFO L225 Difference]: With dead ends: 47 [2020-10-28 14:55:15,469 INFO L226 Difference]: Without dead ends: 41 [2020-10-28 14:55:15,470 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=252, Invalid=3170, Unknown=0, NotChecked=0, Total=3422 [2020-10-28 14:55:15,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-28 14:55:15,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2020-10-28 14:55:15,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-28 14:55:15,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2020-10-28 14:55:15,481 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 39 [2020-10-28 14:55:15,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:55:15,481 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2020-10-28 14:55:15,482 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-28 14:55:15,482 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2020-10-28 14:55:15,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-28 14:55:15,482 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:55:15,482 INFO L422 BasicCegarLoop]: trace histogram [28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:55:15,482 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-28 14:55:15,483 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:55:15,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:55:15,483 INFO L82 PathProgramCache]: Analyzing trace with hash 986732055, now seen corresponding path program 28 times [2020-10-28 14:55:15,492 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:55:15,492 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1787517841] [2020-10-28 14:55:15,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:55:15,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:55:15,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:55:16,427 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:55:16,427 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-28 14:55:16,427 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:55:16,427 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 917 [2020-10-28 14:55:16,428 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:55:16,428 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:55:16,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-28 14:55:16,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:55:16,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-28 14:55:16,428 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:55:17,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:55:17,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:55:17,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:55:17,386 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:55:17,386 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:55:17,386 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:55:17,386 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:55:17,386 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:55:17,386 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:55:17,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:55:17,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:55:17,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:55:17,387 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:55:17,391 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:55:17,391 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1787517841] [2020-10-28 14:55:17,391 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:55:17,391 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-28 14:55:17,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710924540] [2020-10-28 14:55:17,392 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-28 14:55:17,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:55:17,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-28 14:55:17,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=903, Unknown=0, NotChecked=0, Total=992 [2020-10-28 14:55:17,393 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 32 states. [2020-10-28 14:55:20,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:55:20,019 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2020-10-28 14:55:20,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-28 14:55:20,021 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 40 [2020-10-28 14:55:20,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:55:20,021 INFO L225 Difference]: With dead ends: 48 [2020-10-28 14:55:20,022 INFO L226 Difference]: Without dead ends: 42 [2020-10-28 14:55:20,023 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=261, Invalid=3399, Unknown=0, NotChecked=0, Total=3660 [2020-10-28 14:55:20,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-28 14:55:20,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-10-28 14:55:20,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-28 14:55:20,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2020-10-28 14:55:20,028 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 40 [2020-10-28 14:55:20,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:55:20,028 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2020-10-28 14:55:20,029 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-28 14:55:20,029 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2020-10-28 14:55:20,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-28 14:55:20,029 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:55:20,029 INFO L422 BasicCegarLoop]: trace histogram [29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:55:20,029 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-28 14:55:20,029 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:55:20,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:55:20,030 INFO L82 PathProgramCache]: Analyzing trace with hash 1654210750, now seen corresponding path program 29 times [2020-10-28 14:55:20,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:55:20,030 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [704224314] [2020-10-28 14:55:20,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:55:20,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:55:20,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:55:20,837 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:55:20,837 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-28 14:55:20,837 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:55:20,837 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 791 [2020-10-28 14:55:20,838 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:55:20,838 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:55:20,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-28 14:55:20,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:55:20,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-28 14:55:20,838 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:55:21,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:55:21,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:55:21,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:55:21,841 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:55:21,841 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:55:21,841 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:55:21,841 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:55:21,841 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:55:21,842 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:55:21,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:55:21,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:55:21,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:55:21,842 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:55:21,849 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:55:21,849 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [704224314] [2020-10-28 14:55:21,849 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:55:21,849 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-28 14:55:21,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599121697] [2020-10-28 14:55:21,850 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-28 14:55:21,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:55:21,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-28 14:55:21,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=964, Unknown=0, NotChecked=0, Total=1056 [2020-10-28 14:55:21,851 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 33 states. [2020-10-28 14:55:24,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:55:24,730 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2020-10-28 14:55:24,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-28 14:55:24,731 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 41 [2020-10-28 14:55:24,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:55:24,732 INFO L225 Difference]: With dead ends: 49 [2020-10-28 14:55:24,732 INFO L226 Difference]: Without dead ends: 43 [2020-10-28 14:55:24,733 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 436 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=270, Invalid=3636, Unknown=0, NotChecked=0, Total=3906 [2020-10-28 14:55:24,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-28 14:55:24,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2020-10-28 14:55:24,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-28 14:55:24,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2020-10-28 14:55:24,739 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 41 [2020-10-28 14:55:24,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:55:24,739 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2020-10-28 14:55:24,739 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-28 14:55:24,739 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2020-10-28 14:55:24,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-28 14:55:24,739 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:55:24,739 INFO L422 BasicCegarLoop]: trace histogram [30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:55:24,740 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-28 14:55:24,740 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:55:24,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:55:24,740 INFO L82 PathProgramCache]: Analyzing trace with hash 871213815, now seen corresponding path program 30 times [2020-10-28 14:55:24,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:55:24,741 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [86461233] [2020-10-28 14:55:24,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:55:24,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:55:24,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:55:25,893 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:55:25,893 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-28 14:55:25,893 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:55:25,893 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1135 [2020-10-28 14:55:25,893 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:55:25,894 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:55:25,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-28 14:55:25,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:55:25,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-28 14:55:25,894 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:55:26,987 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:55:26,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:55:26,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:55:26,993 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:55:26,994 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:55:26,994 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:55:26,994 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:55:26,994 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:55:26,994 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:55:26,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:55:26,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:55:26,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:55:26,995 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:55:27,001 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:55:27,001 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [86461233] [2020-10-28 14:55:27,001 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:55:27,001 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-28 14:55:27,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083638773] [2020-10-28 14:55:27,002 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-28 14:55:27,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:55:27,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-28 14:55:27,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=1027, Unknown=0, NotChecked=0, Total=1122 [2020-10-28 14:55:27,003 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 34 states. [2020-10-28 14:55:29,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:55:29,892 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2020-10-28 14:55:29,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-28 14:55:29,893 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 42 [2020-10-28 14:55:29,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:55:29,894 INFO L225 Difference]: With dead ends: 50 [2020-10-28 14:55:29,894 INFO L226 Difference]: Without dead ends: 44 [2020-10-28 14:55:29,896 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 466 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=279, Invalid=3881, Unknown=0, NotChecked=0, Total=4160 [2020-10-28 14:55:29,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-28 14:55:29,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2020-10-28 14:55:29,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-28 14:55:29,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2020-10-28 14:55:29,904 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 42 [2020-10-28 14:55:29,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:55:29,904 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2020-10-28 14:55:29,904 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-28 14:55:29,904 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2020-10-28 14:55:29,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-28 14:55:29,904 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:55:29,905 INFO L422 BasicCegarLoop]: trace histogram [31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:55:29,905 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-28 14:55:29,905 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:55:29,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:55:29,905 INFO L82 PathProgramCache]: Analyzing trace with hash -1926854690, now seen corresponding path program 31 times [2020-10-28 14:55:29,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:55:29,906 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [402538205] [2020-10-28 14:55:29,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:55:29,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:55:29,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:55:30,878 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:55:30,878 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-28 14:55:30,878 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:55:30,887 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 956 [2020-10-28 14:55:30,887 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:55:30,887 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:55:30,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-28 14:55:30,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:55:30,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-28 14:55:30,888 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:55:32,027 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:55:32,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:55:32,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:55:32,034 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:55:32,035 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:55:32,035 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:55:32,035 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:55:32,035 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:55:32,035 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:55:32,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:55:32,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:55:32,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:55:32,036 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:55:32,041 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:55:32,041 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [402538205] [2020-10-28 14:55:32,042 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:55:32,042 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-28 14:55:32,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088788653] [2020-10-28 14:55:32,042 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-28 14:55:32,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:55:32,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-28 14:55:32,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=1092, Unknown=0, NotChecked=0, Total=1190 [2020-10-28 14:55:32,044 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 35 states. [2020-10-28 14:55:35,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:55:35,180 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2020-10-28 14:55:35,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-28 14:55:35,180 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 43 [2020-10-28 14:55:35,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:55:35,181 INFO L225 Difference]: With dead ends: 51 [2020-10-28 14:55:35,181 INFO L226 Difference]: Without dead ends: 45 [2020-10-28 14:55:35,184 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 497 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=288, Invalid=4134, Unknown=0, NotChecked=0, Total=4422 [2020-10-28 14:55:35,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-28 14:55:35,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-10-28 14:55:35,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-28 14:55:35,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2020-10-28 14:55:35,190 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 43 [2020-10-28 14:55:35,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:55:35,191 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2020-10-28 14:55:35,191 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-28 14:55:35,191 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2020-10-28 14:55:35,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-28 14:55:35,191 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:55:35,192 INFO L422 BasicCegarLoop]: trace histogram [32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:55:35,192 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-28 14:55:35,192 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:55:35,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:55:35,192 INFO L82 PathProgramCache]: Analyzing trace with hash 1527334871, now seen corresponding path program 32 times [2020-10-28 14:55:35,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:55:35,192 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2012492395] [2020-10-28 14:55:35,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:55:35,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:55:35,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:55:36,199 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:55:36,199 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-28 14:55:36,199 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:55:36,199 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 993 [2020-10-28 14:55:36,200 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:55:36,200 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:55:36,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-28 14:55:36,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:55:36,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-28 14:55:36,200 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:55:37,406 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:55:37,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:55:37,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:55:37,411 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:55:37,411 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:55:37,411 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:55:37,411 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:55:37,421 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:55:37,421 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:55:37,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:55:37,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:55:37,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:55:37,421 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:55:37,427 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:55:37,427 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2012492395] [2020-10-28 14:55:37,427 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:55:37,428 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-28 14:55:37,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384606807] [2020-10-28 14:55:37,429 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-28 14:55:37,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:55:37,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-28 14:55:37,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=1159, Unknown=0, NotChecked=0, Total=1260 [2020-10-28 14:55:37,430 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 36 states. [2020-10-28 14:55:40,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:55:40,747 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2020-10-28 14:55:40,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-28 14:55:40,748 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 44 [2020-10-28 14:55:40,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:55:40,748 INFO L225 Difference]: With dead ends: 52 [2020-10-28 14:55:40,748 INFO L226 Difference]: Without dead ends: 46 [2020-10-28 14:55:40,752 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 529 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=297, Invalid=4395, Unknown=0, NotChecked=0, Total=4692 [2020-10-28 14:55:40,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-28 14:55:40,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2020-10-28 14:55:40,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-28 14:55:40,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2020-10-28 14:55:40,760 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 44 [2020-10-28 14:55:40,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:55:40,760 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2020-10-28 14:55:40,760 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-28 14:55:40,760 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2020-10-28 14:55:40,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-28 14:55:40,761 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:55:40,761 INFO L422 BasicCegarLoop]: trace histogram [33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:55:40,761 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-28 14:55:40,762 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:55:40,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:55:40,762 INFO L82 PathProgramCache]: Analyzing trace with hash 1233028862, now seen corresponding path program 33 times [2020-10-28 14:55:40,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:55:40,762 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [701351189] [2020-10-28 14:55:40,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:55:40,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:55:40,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:55:41,795 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:55:41,795 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-28 14:55:41,795 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:55:41,795 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1015 [2020-10-28 14:55:41,795 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:55:41,796 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:55:41,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-28 14:55:41,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:55:41,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-28 14:55:41,796 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:55:43,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:55:43,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:55:43,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:55:43,076 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:55:43,077 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:55:43,077 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:55:43,077 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:55:43,077 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:55:43,077 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:55:43,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:55:43,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:55:43,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:55:43,078 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:55:43,084 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:55:43,084 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [701351189] [2020-10-28 14:55:43,084 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:55:43,085 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-28 14:55:43,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639465493] [2020-10-28 14:55:43,085 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-28 14:55:43,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:55:43,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-28 14:55:43,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1228, Unknown=0, NotChecked=0, Total=1332 [2020-10-28 14:55:43,087 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand 37 states. [2020-10-28 14:55:46,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:55:46,539 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2020-10-28 14:55:46,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-28 14:55:46,539 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 45 [2020-10-28 14:55:46,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:55:46,540 INFO L225 Difference]: With dead ends: 53 [2020-10-28 14:55:46,540 INFO L226 Difference]: Without dead ends: 47 [2020-10-28 14:55:46,541 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 562 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=306, Invalid=4664, Unknown=0, NotChecked=0, Total=4970 [2020-10-28 14:55:46,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-28 14:55:46,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2020-10-28 14:55:46,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-28 14:55:46,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2020-10-28 14:55:46,549 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 45 [2020-10-28 14:55:46,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:55:46,550 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2020-10-28 14:55:46,550 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-28 14:55:46,550 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2020-10-28 14:55:46,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-28 14:55:46,550 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:55:46,551 INFO L422 BasicCegarLoop]: trace histogram [34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:55:46,551 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-28 14:55:46,551 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:55:46,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:55:46,551 INFO L82 PathProgramCache]: Analyzing trace with hash 699477175, now seen corresponding path program 34 times [2020-10-28 14:55:46,552 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:55:46,552 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1598824801] [2020-10-28 14:55:46,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:55:46,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:55:46,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:55:48,181 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:55:48,181 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-28 14:55:48,181 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:55:48,181 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1609 [2020-10-28 14:55:48,181 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:55:48,181 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:55:48,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-28 14:55:48,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:55:48,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-28 14:55:48,182 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:55:49,479 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:55:49,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:55:49,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:55:49,484 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:55:49,485 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:55:49,485 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:55:49,485 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:55:49,485 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:55:49,485 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:55:49,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:55:49,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:55:49,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:55:49,486 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:55:49,491 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:55:49,491 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1598824801] [2020-10-28 14:55:49,491 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:55:49,491 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-28 14:55:49,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222180195] [2020-10-28 14:55:49,492 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-28 14:55:49,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:55:49,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-28 14:55:49,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1299, Unknown=0, NotChecked=0, Total=1406 [2020-10-28 14:55:49,493 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 38 states. [2020-10-28 14:55:53,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:55:53,000 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2020-10-28 14:55:53,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-28 14:55:53,001 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 46 [2020-10-28 14:55:53,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:55:53,002 INFO L225 Difference]: With dead ends: 54 [2020-10-28 14:55:53,002 INFO L226 Difference]: Without dead ends: 48 [2020-10-28 14:55:53,003 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 596 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=315, Invalid=4941, Unknown=0, NotChecked=0, Total=5256 [2020-10-28 14:55:53,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-28 14:55:53,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-10-28 14:55:53,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-28 14:55:53,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2020-10-28 14:55:53,011 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 46 [2020-10-28 14:55:53,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:55:53,012 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2020-10-28 14:55:53,012 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-28 14:55:53,012 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2020-10-28 14:55:53,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-28 14:55:53,012 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:55:53,013 INFO L422 BasicCegarLoop]: trace histogram [35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:55:53,013 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-28 14:55:53,013 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:55:53,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:55:53,013 INFO L82 PathProgramCache]: Analyzing trace with hash 1339244062, now seen corresponding path program 35 times [2020-10-28 14:55:53,014 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:55:53,014 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [371930749] [2020-10-28 14:55:53,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:55:53,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:55:53,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:55:54,367 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:55:54,367 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-28 14:55:54,367 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:55:54,368 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1334 [2020-10-28 14:55:54,368 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:55:54,368 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:55:54,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-28 14:55:54,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:55:54,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-28 14:55:54,368 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:55:55,701 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:55:55,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:55:55,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:55:55,707 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:55:55,707 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:55:55,707 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:55:55,707 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:55:55,707 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:55:55,707 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:55:55,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:55:55,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:55:55,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:55:55,708 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:55:55,714 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:55:55,714 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [371930749] [2020-10-28 14:55:55,714 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:55:55,714 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-28 14:55:55,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717248519] [2020-10-28 14:55:55,715 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-28 14:55:55,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:55:55,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-28 14:55:55,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1372, Unknown=0, NotChecked=0, Total=1482 [2020-10-28 14:55:55,716 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 39 states. [2020-10-28 14:55:59,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:55:59,546 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2020-10-28 14:55:59,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-28 14:55:59,547 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 47 [2020-10-28 14:55:59,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:55:59,548 INFO L225 Difference]: With dead ends: 55 [2020-10-28 14:55:59,548 INFO L226 Difference]: Without dead ends: 49 [2020-10-28 14:55:59,549 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 631 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=324, Invalid=5226, Unknown=0, NotChecked=0, Total=5550 [2020-10-28 14:55:59,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-28 14:55:59,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2020-10-28 14:55:59,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-28 14:55:59,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2020-10-28 14:55:59,556 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 47 [2020-10-28 14:55:59,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:55:59,556 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2020-10-28 14:55:59,556 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-28 14:55:59,556 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2020-10-28 14:55:59,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-28 14:55:59,556 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:55:59,557 INFO L422 BasicCegarLoop]: trace histogram [36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:55:59,557 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-28 14:55:59,557 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:55:59,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:55:59,557 INFO L82 PathProgramCache]: Analyzing trace with hash -302818921, now seen corresponding path program 36 times [2020-10-28 14:55:59,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:55:59,558 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1879058951] [2020-10-28 14:55:59,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:55:59,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:55:59,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:00,763 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:56:00,763 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-28 14:56:00,763 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:56:00,763 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1190 [2020-10-28 14:56:00,763 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:56:00,763 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:56:00,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-28 14:56:00,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:56:00,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-28 14:56:00,764 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:56:02,255 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:56:02,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:56:02,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:02,260 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:56:02,260 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:56:02,260 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:56:02,260 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:56:02,260 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:56:02,261 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:56:02,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:56:02,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:56:02,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:56:02,261 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:56:02,266 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:56:02,267 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1879058951] [2020-10-28 14:56:02,267 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:56:02,267 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-28 14:56:02,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572862991] [2020-10-28 14:56:02,267 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-28 14:56:02,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:56:02,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-28 14:56:02,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1447, Unknown=0, NotChecked=0, Total=1560 [2020-10-28 14:56:02,268 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 40 states. [2020-10-28 14:56:06,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:56:06,301 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2020-10-28 14:56:06,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-28 14:56:06,302 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 48 [2020-10-28 14:56:06,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:56:06,303 INFO L225 Difference]: With dead ends: 56 [2020-10-28 14:56:06,303 INFO L226 Difference]: Without dead ends: 50 [2020-10-28 14:56:06,305 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 667 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=333, Invalid=5519, Unknown=0, NotChecked=0, Total=5852 [2020-10-28 14:56:06,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-28 14:56:06,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2020-10-28 14:56:06,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-28 14:56:06,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2020-10-28 14:56:06,311 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 48 [2020-10-28 14:56:06,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:56:06,311 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2020-10-28 14:56:06,311 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-28 14:56:06,311 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2020-10-28 14:56:06,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-28 14:56:06,312 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:56:06,312 INFO L422 BasicCegarLoop]: trace histogram [37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:56:06,312 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-28 14:56:06,312 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:56:06,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:56:06,313 INFO L82 PathProgramCache]: Analyzing trace with hash 332836158, now seen corresponding path program 37 times [2020-10-28 14:56:06,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:56:06,313 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1298830279] [2020-10-28 14:56:06,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:56:06,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:56:06,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:07,359 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:56:07,359 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-28 14:56:07,360 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:56:07,360 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1025 [2020-10-28 14:56:07,360 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:56:07,360 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:56:07,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-28 14:56:07,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:56:07,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-28 14:56:07,360 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:56:08,897 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:56:08,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:56:08,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:08,903 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:56:08,903 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:56:08,903 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:56:08,903 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:56:08,903 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:56:08,903 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:56:08,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:56:08,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:56:08,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:56:08,904 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:56:08,909 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:56:08,909 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1298830279] [2020-10-28 14:56:08,909 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:56:08,909 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-28 14:56:08,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627583992] [2020-10-28 14:56:08,910 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-28 14:56:08,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:56:08,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-28 14:56:08,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1524, Unknown=0, NotChecked=0, Total=1640 [2020-10-28 14:56:08,911 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand 41 states. [2020-10-28 14:56:13,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:56:13,121 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2020-10-28 14:56:13,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-28 14:56:13,122 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 49 [2020-10-28 14:56:13,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:56:13,123 INFO L225 Difference]: With dead ends: 57 [2020-10-28 14:56:13,123 INFO L226 Difference]: Without dead ends: 51 [2020-10-28 14:56:13,124 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 704 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=342, Invalid=5820, Unknown=0, NotChecked=0, Total=6162 [2020-10-28 14:56:13,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-28 14:56:13,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-10-28 14:56:13,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-28 14:56:13,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2020-10-28 14:56:13,130 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 49 [2020-10-28 14:56:13,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:56:13,130 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2020-10-28 14:56:13,130 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-28 14:56:13,130 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2020-10-28 14:56:13,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-28 14:56:13,131 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:56:13,131 INFO L422 BasicCegarLoop]: trace histogram [38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:56:13,131 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-28 14:56:13,131 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:56:13,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:56:13,131 INFO L82 PathProgramCache]: Analyzing trace with hash -1436692873, now seen corresponding path program 38 times [2020-10-28 14:56:13,132 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:56:13,132 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [956854539] [2020-10-28 14:56:13,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:56:13,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:56:13,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:14,662 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:56:14,662 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-28 14:56:14,662 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:56:14,662 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1512 [2020-10-28 14:56:14,662 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:56:14,662 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:56:14,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-28 14:56:14,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:56:14,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-28 14:56:14,663 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:56:16,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:56:16,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:56:16,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:16,292 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:56:16,292 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:56:16,292 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:56:16,293 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:56:16,293 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:56:16,293 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:56:16,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:56:16,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:56:16,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:56:16,293 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:56:16,303 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:56:16,304 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [956854539] [2020-10-28 14:56:16,304 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:56:16,304 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-10-28 14:56:16,305 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680338579] [2020-10-28 14:56:16,305 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-28 14:56:16,305 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:56:16,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-28 14:56:16,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1603, Unknown=0, NotChecked=0, Total=1722 [2020-10-28 14:56:16,306 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 42 states. [2020-10-28 14:56:20,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:56:20,751 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2020-10-28 14:56:20,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-28 14:56:20,752 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 50 [2020-10-28 14:56:20,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:56:20,753 INFO L225 Difference]: With dead ends: 58 [2020-10-28 14:56:20,753 INFO L226 Difference]: Without dead ends: 52 [2020-10-28 14:56:20,755 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 742 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=351, Invalid=6129, Unknown=0, NotChecked=0, Total=6480 [2020-10-28 14:56:20,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-28 14:56:20,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2020-10-28 14:56:20,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-28 14:56:20,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2020-10-28 14:56:20,763 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 50 [2020-10-28 14:56:20,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:56:20,763 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2020-10-28 14:56:20,763 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-28 14:56:20,763 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2020-10-28 14:56:20,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-28 14:56:20,764 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:56:20,764 INFO L422 BasicCegarLoop]: trace histogram [39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:56:20,764 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-28 14:56:20,764 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:56:20,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:56:20,765 INFO L82 PathProgramCache]: Analyzing trace with hash -457517986, now seen corresponding path program 39 times [2020-10-28 14:56:20,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:56:20,765 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [80778648] [2020-10-28 14:56:20,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:56:20,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:56:20,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:22,500 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:56:22,500 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-28 14:56:22,501 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:56:22,501 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1719 [2020-10-28 14:56:22,501 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:56:22,501 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:56:22,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 41 [2020-10-28 14:56:22,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:56:22,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-28 14:56:22,501 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:56:24,229 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:56:24,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:56:24,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:24,237 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:56:24,237 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:56:24,237 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:56:24,237 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:56:24,238 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:56:24,238 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:56:24,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:56:24,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:56:24,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:56:24,238 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:56:24,246 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:56:24,247 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [80778648] [2020-10-28 14:56:24,247 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:56:24,247 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-10-28 14:56:24,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620791018] [2020-10-28 14:56:24,247 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-28 14:56:24,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:56:24,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-28 14:56:24,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1684, Unknown=0, NotChecked=0, Total=1806 [2020-10-28 14:56:24,248 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand 43 states. [2020-10-28 14:56:28,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:56:28,760 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2020-10-28 14:56:28,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-28 14:56:28,761 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 51 [2020-10-28 14:56:28,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:56:28,762 INFO L225 Difference]: With dead ends: 59 [2020-10-28 14:56:28,762 INFO L226 Difference]: Without dead ends: 53 [2020-10-28 14:56:28,764 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 781 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=360, Invalid=6446, Unknown=0, NotChecked=0, Total=6806 [2020-10-28 14:56:28,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-28 14:56:28,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2020-10-28 14:56:28,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-28 14:56:28,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2020-10-28 14:56:28,771 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 51 [2020-10-28 14:56:28,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:56:28,771 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2020-10-28 14:56:28,772 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-28 14:56:28,772 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2020-10-28 14:56:28,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-28 14:56:28,772 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:56:28,772 INFO L422 BasicCegarLoop]: trace histogram [40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:56:28,772 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-28 14:56:28,773 INFO L429 AbstractCegarLoop]: === Iteration 42 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:56:28,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:56:28,773 INFO L82 PathProgramCache]: Analyzing trace with hash -167867561, now seen corresponding path program 40 times [2020-10-28 14:56:28,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:56:28,773 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1406609629] [2020-10-28 14:56:28,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:56:28,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:56:28,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:30,021 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:56:30,022 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-28 14:56:30,022 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:56:30,022 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1221 [2020-10-28 14:56:30,022 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:56:30,022 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:56:30,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 42 [2020-10-28 14:56:30,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:56:30,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-28 14:56:30,022 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:56:31,857 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:56:31,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:56:31,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:31,863 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:56:31,863 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:56:31,863 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:56:31,863 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:56:31,863 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:56:31,863 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:56:31,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:56:31,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:56:31,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:56:31,864 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:56:31,870 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:56:31,871 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1406609629] [2020-10-28 14:56:31,871 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:56:31,871 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-10-28 14:56:31,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724543122] [2020-10-28 14:56:31,871 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-10-28 14:56:31,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:56:31,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-10-28 14:56:31,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=1767, Unknown=0, NotChecked=0, Total=1892 [2020-10-28 14:56:31,872 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 44 states. [2020-10-28 14:56:36,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:56:36,775 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2020-10-28 14:56:36,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-28 14:56:36,776 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 52 [2020-10-28 14:56:36,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:56:36,777 INFO L225 Difference]: With dead ends: 60 [2020-10-28 14:56:36,777 INFO L226 Difference]: Without dead ends: 54 [2020-10-28 14:56:36,778 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 821 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=369, Invalid=6771, Unknown=0, NotChecked=0, Total=7140 [2020-10-28 14:56:36,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-28 14:56:36,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-10-28 14:56:36,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-28 14:56:36,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2020-10-28 14:56:36,785 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 52 [2020-10-28 14:56:36,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:56:36,785 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2020-10-28 14:56:36,785 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-10-28 14:56:36,785 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2020-10-28 14:56:36,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-28 14:56:36,786 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:56:36,786 INFO L422 BasicCegarLoop]: trace histogram [41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:56:36,786 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-28 14:56:36,786 INFO L429 AbstractCegarLoop]: === Iteration 43 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:56:36,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:56:36,787 INFO L82 PathProgramCache]: Analyzing trace with hash 221361022, now seen corresponding path program 41 times [2020-10-28 14:56:36,787 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:56:36,787 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [153199783] [2020-10-28 14:56:36,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:56:36,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:56:36,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:39,086 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:56:39,086 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-28 14:56:39,087 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:56:39,087 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2274 [2020-10-28 14:56:39,087 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:56:39,087 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:56:39,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 43 [2020-10-28 14:56:39,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:56:39,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-28 14:56:39,088 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:56:41,006 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:56:41,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:56:41,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:41,011 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:56:41,012 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:56:41,012 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:56:41,012 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:56:41,012 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:56:41,012 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:56:41,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:56:41,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:56:41,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:56:41,013 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:56:41,019 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:56:41,019 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [153199783] [2020-10-28 14:56:41,020 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:56:41,020 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-10-28 14:56:41,020 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560777011] [2020-10-28 14:56:41,020 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-10-28 14:56:41,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:56:41,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-10-28 14:56:41,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=1852, Unknown=0, NotChecked=0, Total=1980 [2020-10-28 14:56:41,021 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand 45 states. [2020-10-28 14:56:46,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:56:46,201 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2020-10-28 14:56:46,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-28 14:56:46,202 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 53 [2020-10-28 14:56:46,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:56:46,203 INFO L225 Difference]: With dead ends: 61 [2020-10-28 14:56:46,203 INFO L226 Difference]: Without dead ends: 55 [2020-10-28 14:56:46,205 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 862 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=378, Invalid=7104, Unknown=0, NotChecked=0, Total=7482 [2020-10-28 14:56:46,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-28 14:56:46,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2020-10-28 14:56:46,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-28 14:56:46,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2020-10-28 14:56:46,211 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 53 [2020-10-28 14:56:46,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:56:46,211 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2020-10-28 14:56:46,211 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-10-28 14:56:46,212 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2020-10-28 14:56:46,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-28 14:56:46,212 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:56:46,212 INFO L422 BasicCegarLoop]: trace histogram [42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:56:46,212 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-28 14:56:46,213 INFO L429 AbstractCegarLoop]: === Iteration 44 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:56:46,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:56:46,213 INFO L82 PathProgramCache]: Analyzing trace with hash -597454793, now seen corresponding path program 42 times [2020-10-28 14:56:46,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:56:46,213 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1275165573] [2020-10-28 14:56:46,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:56:46,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:56:46,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:48,147 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:56:48,148 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-28 14:56:48,148 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:56:48,148 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1915 [2020-10-28 14:56:48,148 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:56:48,148 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:56:48,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 44 [2020-10-28 14:56:48,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:56:48,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-28 14:56:48,149 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:56:50,210 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:56:50,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:56:50,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:50,216 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:56:50,216 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:56:50,216 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:56:50,217 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:56:50,217 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:56:50,217 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:56:50,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:56:50,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:56:50,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:56:50,217 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:56:50,227 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:56:50,227 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1275165573] [2020-10-28 14:56:50,227 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:56:50,227 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-10-28 14:56:50,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171305017] [2020-10-28 14:56:50,228 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-10-28 14:56:50,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:56:50,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-10-28 14:56:50,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=1939, Unknown=0, NotChecked=0, Total=2070 [2020-10-28 14:56:50,229 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 46 states. [2020-10-28 14:56:55,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:56:55,551 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2020-10-28 14:56:55,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-28 14:56:55,552 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 54 [2020-10-28 14:56:55,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:56:55,553 INFO L225 Difference]: With dead ends: 62 [2020-10-28 14:56:55,553 INFO L226 Difference]: Without dead ends: 56 [2020-10-28 14:56:55,554 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 904 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=387, Invalid=7445, Unknown=0, NotChecked=0, Total=7832 [2020-10-28 14:56:55,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-28 14:56:55,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2020-10-28 14:56:55,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-28 14:56:55,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2020-10-28 14:56:55,562 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 54 [2020-10-28 14:56:55,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:56:55,562 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2020-10-28 14:56:55,562 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-10-28 14:56:55,563 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2020-10-28 14:56:55,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-28 14:56:55,563 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:56:55,563 INFO L422 BasicCegarLoop]: trace histogram [43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:56:55,563 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-28 14:56:55,563 INFO L429 AbstractCegarLoop]: === Iteration 45 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:56:55,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:56:55,564 INFO L82 PathProgramCache]: Analyzing trace with hash -210941282, now seen corresponding path program 43 times [2020-10-28 14:56:55,564 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:56:55,564 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1204675192] [2020-10-28 14:56:55,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:56:55,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:56:55,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:57,932 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:56:57,933 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-28 14:56:57,933 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:56:57,933 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2346 [2020-10-28 14:56:57,933 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:56:57,933 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:56:57,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 45 [2020-10-28 14:56:57,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:56:57,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-28 14:56:57,934 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:57:00,002 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:57:00,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:57:00,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:00,009 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:57:00,009 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:57:00,009 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:57:00,009 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:57:00,009 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:57:00,009 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:57:00,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:57:00,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:57:00,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:57:00,010 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:57:00,016 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:57:00,017 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1204675192] [2020-10-28 14:57:00,017 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:57:00,017 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2020-10-28 14:57:00,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114559896] [2020-10-28 14:57:00,017 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-10-28 14:57:00,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:57:00,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-10-28 14:57:00,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=2028, Unknown=0, NotChecked=0, Total=2162 [2020-10-28 14:57:00,018 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand 47 states. [2020-10-28 14:57:05,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:57:05,524 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2020-10-28 14:57:05,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-28 14:57:05,525 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 55 [2020-10-28 14:57:05,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:57:05,526 INFO L225 Difference]: With dead ends: 63 [2020-10-28 14:57:05,526 INFO L226 Difference]: Without dead ends: 57 [2020-10-28 14:57:05,527 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 947 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=396, Invalid=7794, Unknown=0, NotChecked=0, Total=8190 [2020-10-28 14:57:05,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-28 14:57:05,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-10-28 14:57:05,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-28 14:57:05,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2020-10-28 14:57:05,534 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 55 [2020-10-28 14:57:05,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:57:05,534 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2020-10-28 14:57:05,534 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-10-28 14:57:05,534 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2020-10-28 14:57:05,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-28 14:57:05,534 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:57:05,534 INFO L422 BasicCegarLoop]: trace histogram [44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:57:05,535 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-28 14:57:05,535 INFO L429 AbstractCegarLoop]: === Iteration 46 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:57:05,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:57:05,535 INFO L82 PathProgramCache]: Analyzing trace with hash -1113924329, now seen corresponding path program 44 times [2020-10-28 14:57:05,535 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:57:05,535 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1837850260] [2020-10-28 14:57:05,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:57:05,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:57:05,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:07,672 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:57:07,672 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-28 14:57:07,672 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:57:07,672 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2118 [2020-10-28 14:57:07,672 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:57:07,673 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:57:07,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 46 [2020-10-28 14:57:07,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:57:07,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-28 14:57:07,673 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:57:09,847 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:57:09,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:57:09,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:09,853 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:57:09,854 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:57:09,854 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:57:09,854 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:57:09,854 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:57:09,854 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:57:09,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:57:09,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:57:09,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:57:09,855 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:57:09,862 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:57:09,863 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1837850260] [2020-10-28 14:57:09,863 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:57:09,863 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2020-10-28 14:57:09,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187012571] [2020-10-28 14:57:09,863 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-10-28 14:57:09,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:57:09,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-10-28 14:57:09,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=2119, Unknown=0, NotChecked=0, Total=2256 [2020-10-28 14:57:09,864 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 48 states. [2020-10-28 14:57:15,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:57:15,639 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2020-10-28 14:57:15,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-28 14:57:15,640 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 56 [2020-10-28 14:57:15,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:57:15,641 INFO L225 Difference]: With dead ends: 64 [2020-10-28 14:57:15,641 INFO L226 Difference]: Without dead ends: 58 [2020-10-28 14:57:15,642 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 991 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=405, Invalid=8151, Unknown=0, NotChecked=0, Total=8556 [2020-10-28 14:57:15,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-28 14:57:15,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2020-10-28 14:57:15,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-28 14:57:15,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2020-10-28 14:57:15,651 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 56 [2020-10-28 14:57:15,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:57:15,651 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2020-10-28 14:57:15,651 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-10-28 14:57:15,651 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2020-10-28 14:57:15,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-28 14:57:15,652 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:57:15,652 INFO L422 BasicCegarLoop]: trace histogram [45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:57:15,652 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-28 14:57:15,652 INFO L429 AbstractCegarLoop]: === Iteration 47 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:57:15,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:57:15,653 INFO L82 PathProgramCache]: Analyzing trace with hash 958372286, now seen corresponding path program 45 times [2020-10-28 14:57:15,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:57:15,653 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2107469099] [2020-10-28 14:57:15,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:57:15,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:57:15,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:17,756 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:57:17,757 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-28 14:57:17,757 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:57:17,757 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2078 [2020-10-28 14:57:17,757 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:57:17,757 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:57:17,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 47 [2020-10-28 14:57:17,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:57:17,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-28 14:57:17,758 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:57:19,989 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:57:19,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:57:19,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:19,995 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:57:19,995 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:57:19,995 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:57:19,995 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:57:19,995 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:57:19,995 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:57:19,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:57:19,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:57:19,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:57:19,996 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:57:20,003 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:57:20,003 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2107469099] [2020-10-28 14:57:20,004 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:57:20,004 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2020-10-28 14:57:20,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607836272] [2020-10-28 14:57:20,004 INFO L461 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-10-28 14:57:20,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:57:20,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-10-28 14:57:20,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=2212, Unknown=0, NotChecked=0, Total=2352 [2020-10-28 14:57:20,005 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand 49 states. [2020-10-28 14:57:26,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:57:26,030 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2020-10-28 14:57:26,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-28 14:57:26,031 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 57 [2020-10-28 14:57:26,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:57:26,032 INFO L225 Difference]: With dead ends: 65 [2020-10-28 14:57:26,032 INFO L226 Difference]: Without dead ends: 59 [2020-10-28 14:57:26,033 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1036 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=414, Invalid=8516, Unknown=0, NotChecked=0, Total=8930 [2020-10-28 14:57:26,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-28 14:57:26,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2020-10-28 14:57:26,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-28 14:57:26,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2020-10-28 14:57:26,040 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 57 [2020-10-28 14:57:26,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:57:26,040 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2020-10-28 14:57:26,040 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-10-28 14:57:26,040 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2020-10-28 14:57:26,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-28 14:57:26,040 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:57:26,040 INFO L422 BasicCegarLoop]: trace histogram [46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:57:26,041 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-28 14:57:26,041 INFO L429 AbstractCegarLoop]: === Iteration 48 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:57:26,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:57:26,041 INFO L82 PathProgramCache]: Analyzing trace with hash 775057911, now seen corresponding path program 46 times [2020-10-28 14:57:26,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:57:26,041 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1626728573] [2020-10-28 14:57:26,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:57:26,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:57:26,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:28,337 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:57:28,337 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-28 14:57:28,337 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:57:28,337 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2276 [2020-10-28 14:57:28,337 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:57:28,337 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:57:28,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 48 [2020-10-28 14:57:28,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:57:28,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-28 14:57:28,338 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:57:30,653 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:57:30,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:57:30,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:30,657 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:57:30,657 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:57:30,658 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:57:30,658 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:57:30,658 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:57:30,658 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:57:30,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:57:30,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:57:30,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:57:30,658 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:57:30,666 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:57:30,666 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1626728573] [2020-10-28 14:57:30,666 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:57:30,666 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2020-10-28 14:57:30,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804029654] [2020-10-28 14:57:30,666 INFO L461 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-10-28 14:57:30,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:57:30,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-10-28 14:57:30,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=2307, Unknown=0, NotChecked=0, Total=2450 [2020-10-28 14:57:30,667 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 50 states. [2020-10-28 14:57:36,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:57:36,951 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2020-10-28 14:57:36,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-10-28 14:57:36,952 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 58 [2020-10-28 14:57:36,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:57:36,953 INFO L225 Difference]: With dead ends: 66 [2020-10-28 14:57:36,953 INFO L226 Difference]: Without dead ends: 60 [2020-10-28 14:57:36,954 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1082 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=423, Invalid=8889, Unknown=0, NotChecked=0, Total=9312 [2020-10-28 14:57:36,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-28 14:57:36,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2020-10-28 14:57:36,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-28 14:57:36,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 60 transitions. [2020-10-28 14:57:36,963 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 60 transitions. Word has length 58 [2020-10-28 14:57:36,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:57:36,964 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 60 transitions. [2020-10-28 14:57:36,964 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-10-28 14:57:36,964 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 60 transitions. [2020-10-28 14:57:36,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-28 14:57:36,964 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:57:36,965 INFO L422 BasicCegarLoop]: trace histogram [47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:57:36,965 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-28 14:57:36,965 INFO L429 AbstractCegarLoop]: === Iteration 49 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:57:36,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:57:36,965 INFO L82 PathProgramCache]: Analyzing trace with hash -612720418, now seen corresponding path program 47 times [2020-10-28 14:57:36,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:57:36,966 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [418498911] [2020-10-28 14:57:36,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:57:36,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:57:37,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:39,303 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:57:39,303 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-28 14:57:39,304 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:57:39,304 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2316 [2020-10-28 14:57:39,304 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:57:39,304 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:57:39,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 49 [2020-10-28 14:57:39,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:57:39,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-28 14:57:39,304 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:57:41,733 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:57:41,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:57:41,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:41,739 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:57:41,739 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:57:41,739 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:57:41,739 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:57:41,739 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:57:41,739 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:57:41,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:57:41,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:57:41,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:57:41,740 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:57:41,748 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:57:41,749 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [418498911] [2020-10-28 14:57:41,749 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:57:41,749 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51] total 51 [2020-10-28 14:57:41,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310999346] [2020-10-28 14:57:41,749 INFO L461 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-10-28 14:57:41,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:57:41,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-10-28 14:57:41,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=2404, Unknown=0, NotChecked=0, Total=2550 [2020-10-28 14:57:41,751 INFO L87 Difference]: Start difference. First operand 60 states and 60 transitions. Second operand 51 states. [2020-10-28 14:57:48,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:57:48,264 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2020-10-28 14:57:48,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-10-28 14:57:48,265 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 59 [2020-10-28 14:57:48,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:57:48,266 INFO L225 Difference]: With dead ends: 67 [2020-10-28 14:57:48,266 INFO L226 Difference]: Without dead ends: 61 [2020-10-28 14:57:48,267 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1129 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=432, Invalid=9270, Unknown=0, NotChecked=0, Total=9702 [2020-10-28 14:57:48,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-28 14:57:48,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2020-10-28 14:57:48,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-28 14:57:48,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2020-10-28 14:57:48,275 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 59 [2020-10-28 14:57:48,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:57:48,275 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2020-10-28 14:57:48,275 INFO L482 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-10-28 14:57:48,275 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2020-10-28 14:57:48,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-28 14:57:48,276 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:57:48,276 INFO L422 BasicCegarLoop]: trace histogram [48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:57:48,276 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-28 14:57:48,276 INFO L429 AbstractCegarLoop]: === Iteration 50 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:57:48,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:57:48,277 INFO L82 PathProgramCache]: Analyzing trace with hash -684175657, now seen corresponding path program 48 times [2020-10-28 14:57:48,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:57:48,277 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1104970291] [2020-10-28 14:57:48,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:57:48,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:57:48,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:51,587 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:57:51,587 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-28 14:57:51,587 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:57:51,587 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3288 [2020-10-28 14:57:51,587 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:57:51,588 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:57:51,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 50 [2020-10-28 14:57:51,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:57:51,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-28 14:57:51,588 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:57:54,151 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:57:54,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:57:54,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:54,157 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:57:54,157 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:57:54,157 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:57:54,157 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:57:54,157 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:57:54,157 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:57:54,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:57:54,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:57:54,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:57:54,158 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:57:54,166 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:57:54,166 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1104970291] [2020-10-28 14:57:54,166 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:57:54,166 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2020-10-28 14:57:54,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867320162] [2020-10-28 14:57:54,167 INFO L461 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-10-28 14:57:54,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:57:54,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-10-28 14:57:54,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=2503, Unknown=0, NotChecked=0, Total=2652 [2020-10-28 14:57:54,167 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand 52 states. [2020-10-28 14:58:00,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:58:00,860 INFO L93 Difference]: Finished difference Result 68 states and 68 transitions. [2020-10-28 14:58:00,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-10-28 14:58:00,861 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 60 [2020-10-28 14:58:00,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:58:00,862 INFO L225 Difference]: With dead ends: 68 [2020-10-28 14:58:00,862 INFO L226 Difference]: Without dead ends: 62 [2020-10-28 14:58:00,863 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1177 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=441, Invalid=9659, Unknown=0, NotChecked=0, Total=10100 [2020-10-28 14:58:00,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-28 14:58:00,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2020-10-28 14:58:00,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-28 14:58:00,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 62 transitions. [2020-10-28 14:58:00,871 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 62 transitions. Word has length 60 [2020-10-28 14:58:00,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:58:00,872 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 62 transitions. [2020-10-28 14:58:00,872 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-10-28 14:58:00,872 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 62 transitions. [2020-10-28 14:58:00,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-28 14:58:00,872 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:58:00,873 INFO L422 BasicCegarLoop]: trace histogram [49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:58:00,873 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-10-28 14:58:00,873 INFO L429 AbstractCegarLoop]: === Iteration 51 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:58:00,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:58:00,873 INFO L82 PathProgramCache]: Analyzing trace with hash 1395679230, now seen corresponding path program 49 times [2020-10-28 14:58:00,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:58:00,874 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1454081938] [2020-10-28 14:58:00,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:58:00,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:58:00,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:58:03,119 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:58:03,119 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-28 14:58:03,119 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:58:03,119 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2215 [2020-10-28 14:58:03,120 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:58:03,120 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:58:03,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 51 [2020-10-28 14:58:03,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:58:03,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-28 14:58:03,120 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:58:05,774 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:58:05,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:58:05,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:58:05,780 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:58:05,781 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:58:05,781 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:58:05,781 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:58:05,781 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:58:05,781 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:58:05,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:58:05,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:58:05,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:58:05,782 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:58:05,794 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:58:05,794 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1454081938] [2020-10-28 14:58:05,794 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:58:05,794 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2020-10-28 14:58:05,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540600365] [2020-10-28 14:58:05,795 INFO L461 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-10-28 14:58:05,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:58:05,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-10-28 14:58:05,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=2604, Unknown=0, NotChecked=0, Total=2756 [2020-10-28 14:58:05,796 INFO L87 Difference]: Start difference. First operand 62 states and 62 transitions. Second operand 53 states.