/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=DEEPEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/array-industry-pattern/array_range_init.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 14:46:46,307 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 14:46:46,312 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 14:46:46,375 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 14:46:46,376 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 14:46:46,380 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 14:46:46,385 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 14:46:46,389 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 14:46:46,399 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 14:46:46,400 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 14:46:46,402 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 14:46:46,403 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 14:46:46,404 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 14:46:46,405 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 14:46:46,406 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 14:46:46,408 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 14:46:46,409 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 14:46:46,410 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 14:46:46,412 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 14:46:46,414 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 14:46:46,417 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 14:46:46,421 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 14:46:46,422 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 14:46:46,423 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 14:46:46,426 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 14:46:46,427 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 14:46:46,427 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 14:46:46,429 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 14:46:46,429 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 14:46:46,430 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 14:46:46,431 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 14:46:46,432 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 14:46:46,433 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 14:46:46,434 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 14:46:46,435 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 14:46:46,436 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 14:46:46,437 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 14:46:46,437 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 14:46:46,438 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 14:46:46,439 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 14:46:46,440 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 14:46:46,443 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-27 14:46:46,477 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 14:46:46,477 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 14:46:46,479 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 14:46:46,479 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 14:46:46,479 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 14:46:46,480 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 14:46:46,480 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 14:46:46,481 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 14:46:46,481 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 14:46:46,481 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 14:46:46,482 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 14:46:46,482 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 14:46:46,483 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 14:46:46,483 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 14:46:46,483 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 14:46:46,484 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 14:46:46,484 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 14:46:46,484 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 14:46:46,484 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 14:46:46,485 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 14:46:46,485 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 14:46:46,485 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 14:46:46,486 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 14:46:46,486 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 14:46:46,486 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 14:46:46,487 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 14:46:46,487 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 14:46:46,487 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 14:46:46,487 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 14:46:46,488 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 14:46:46,954 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 14:46:46,991 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 14:46:46,995 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 14:46:46,997 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 14:46:46,998 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 14:46:46,999 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-industry-pattern/array_range_init.i [2020-10-27 14:46:47,083 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/939de6d5e/1c847c4b494f47dd9458b9abeeecd74c/FLAGe9050ebff [2020-10-27 14:46:47,762 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 14:46:47,763 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-industry-pattern/array_range_init.i [2020-10-27 14:46:47,771 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/939de6d5e/1c847c4b494f47dd9458b9abeeecd74c/FLAGe9050ebff [2020-10-27 14:46:48,139 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/939de6d5e/1c847c4b494f47dd9458b9abeeecd74c [2020-10-27 14:46:48,143 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 14:46:48,150 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 14:46:48,152 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 14:46:48,152 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 14:46:48,156 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 14:46:48,157 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 02:46:48" (1/1) ... [2020-10-27 14:46:48,161 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@34fc31df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:46:48, skipping insertion in model container [2020-10-27 14:46:48,161 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 02:46:48" (1/1) ... [2020-10-27 14:46:48,170 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 14:46:48,187 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 14:46:48,361 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 14:46:48,374 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 14:46:48,394 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 14:46:48,414 INFO L208 MainTranslator]: Completed translation [2020-10-27 14:46:48,414 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:46:48 WrapperNode [2020-10-27 14:46:48,414 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 14:46:48,416 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 14:46:48,416 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 14:46:48,416 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 14:46:48,430 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:46:48" (1/1) ... [2020-10-27 14:46:48,431 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:46:48" (1/1) ... [2020-10-27 14:46:48,441 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:46:48" (1/1) ... [2020-10-27 14:46:48,441 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:46:48" (1/1) ... [2020-10-27 14:46:48,450 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:46:48" (1/1) ... [2020-10-27 14:46:48,455 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:46:48" (1/1) ... [2020-10-27 14:46:48,457 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:46:48" (1/1) ... [2020-10-27 14:46:48,459 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 14:46:48,461 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 14:46:48,461 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 14:46:48,461 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 14:46:48,462 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:46:48" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 14:46:48,550 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 14:46:48,551 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 14:46:48,551 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 14:46:48,551 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-27 14:46:48,551 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 14:46:48,551 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 14:46:48,551 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 14:46:48,552 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-27 14:46:48,552 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-27 14:46:48,552 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 14:46:48,552 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 14:46:48,552 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-27 14:46:48,552 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 14:46:48,552 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 14:46:48,553 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 14:46:48,553 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 14:46:48,553 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 14:46:48,553 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 14:46:48,553 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 14:46:48,863 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 14:46:48,863 INFO L298 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-27 14:46:48,865 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 02:46:48 BoogieIcfgContainer [2020-10-27 14:46:48,866 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 14:46:48,868 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 14:46:48,869 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 14:46:48,873 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 14:46:48,874 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 02:46:48" (1/3) ... [2020-10-27 14:46:48,875 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a6e4a93 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 02:46:48, skipping insertion in model container [2020-10-27 14:46:48,875 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:46:48" (2/3) ... [2020-10-27 14:46:48,876 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a6e4a93 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 02:46:48, skipping insertion in model container [2020-10-27 14:46:48,876 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 02:46:48" (3/3) ... [2020-10-27 14:46:48,878 INFO L111 eAbstractionObserver]: Analyzing ICFG array_range_init.i [2020-10-27 14:46:48,896 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 14:46:48,908 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 14:46:48,942 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 14:46:49,020 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 14:46:49,023 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 14:46:49,023 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 14:46:49,024 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 14:46:49,024 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 14:46:49,024 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 14:46:49,024 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 14:46:49,024 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 14:46:49,046 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states. [2020-10-27 14:46:49,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-27 14:46:49,057 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:46:49,058 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:46:49,071 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:46:49,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:46:49,079 INFO L82 PathProgramCache]: Analyzing trace with hash -291234818, now seen corresponding path program 1 times [2020-10-27 14:46:49,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:46:49,091 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [74701451] [2020-10-27 14:46:49,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:46:49,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:46:49,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:46:49,408 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:46:49,408 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-27 14:46:49,409 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:46:49,409 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 159 [2020-10-27 14:46:49,411 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:46:49,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:46:49,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 14:46:49,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:46:49,412 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 14:46:49,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:46:49,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:46:49,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:46:49,553 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:46:49,553 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:46:49,553 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:46:49,554 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-27 14:46:49,554 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:46:49,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:46:49,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:46:49,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:46:49,555 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 14:46:49,571 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:46:49,572 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [74701451] [2020-10-27 14:46:49,575 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 14:46:49,575 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-27 14:46:49,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175743062] [2020-10-27 14:46:49,582 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-27 14:46:49,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:46:49,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-27 14:46:49,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-27 14:46:49,605 INFO L87 Difference]: Start difference. First operand 30 states. Second operand 3 states. [2020-10-27 14:46:49,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:46:49,771 INFO L93 Difference]: Finished difference Result 58 states and 76 transitions. [2020-10-27 14:46:49,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-27 14:46:49,773 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2020-10-27 14:46:49,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:46:49,784 INFO L225 Difference]: With dead ends: 58 [2020-10-27 14:46:49,785 INFO L226 Difference]: Without dead ends: 29 [2020-10-27 14:46:49,789 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-27 14:46:49,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-27 14:46:49,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 22. [2020-10-27 14:46:49,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-27 14:46:49,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2020-10-27 14:46:49,840 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 15 [2020-10-27 14:46:49,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:46:49,841 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2020-10-27 14:46:49,841 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-27 14:46:49,841 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2020-10-27 14:46:49,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-27 14:46:49,842 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:46:49,843 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:46:49,843 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 14:46:49,843 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:46:49,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:46:49,844 INFO L82 PathProgramCache]: Analyzing trace with hash -1884072205, now seen corresponding path program 1 times [2020-10-27 14:46:49,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:46:49,845 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [383930973] [2020-10-27 14:46:49,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:46:49,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:46:49,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:46:49,981 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:46:49,982 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-27 14:46:49,982 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:46:49,982 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 117 [2020-10-27 14:46:49,982 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:46:49,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:46:49,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 14:46:49,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 14:46:49,983 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:46:50,063 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:46:50,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:46:50,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:46:50,080 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:46:50,080 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:46:50,081 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:46:50,081 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 14:46:50,081 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:46:50,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:46:50,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:46:50,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:46:50,082 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:46:50,090 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:46:50,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [383930973] [2020-10-27 14:46:50,091 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 14:46:50,091 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 14:46:50,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410049726] [2020-10-27 14:46:50,093 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 14:46:50,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:46:50,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 14:46:50,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 14:46:50,095 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand 4 states. [2020-10-27 14:46:50,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:46:50,296 INFO L93 Difference]: Finished difference Result 42 states and 47 transitions. [2020-10-27 14:46:50,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 14:46:50,297 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2020-10-27 14:46:50,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:46:50,299 INFO L225 Difference]: With dead ends: 42 [2020-10-27 14:46:50,299 INFO L226 Difference]: Without dead ends: 29 [2020-10-27 14:46:50,300 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 [2020-10-27 14:46:50,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-27 14:46:50,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 23. [2020-10-27 14:46:50,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-27 14:46:50,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2020-10-27 14:46:50,311 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 15 [2020-10-27 14:46:50,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:46:50,312 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2020-10-27 14:46:50,312 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 14:46:50,312 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2020-10-27 14:46:50,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-27 14:46:50,313 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:46:50,313 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:46:50,313 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 14:46:50,314 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:46:50,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:46:50,315 INFO L82 PathProgramCache]: Analyzing trace with hash 1043641998, now seen corresponding path program 1 times [2020-10-27 14:46:50,315 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:46:50,315 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1870070819] [2020-10-27 14:46:50,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:46:50,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:46:50,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:46:50,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:46:50,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:46:50,996 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:46:50,996 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-27 14:46:50,996 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:46:50,997 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 660 [2020-10-27 14:46:50,998 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:46:50,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 14:46:50,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 14:46:50,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-27 14:46:50,999 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 14:46:51,057 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:46:51,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:46:51,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:46:51,070 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:46:51,070 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:46:51,071 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:46:51,071 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 14:46:51,071 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:46:51,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:46:51,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:46:51,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:46:51,072 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:46:51,078 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:46:51,079 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1870070819] [2020-10-27 14:46:51,079 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 14:46:51,079 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 14:46:51,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108016300] [2020-10-27 14:46:51,080 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 14:46:51,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:46:51,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 14:46:51,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 14:46:51,082 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 5 states. [2020-10-27 14:46:51,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:46:51,237 INFO L93 Difference]: Finished difference Result 49 states and 56 transitions. [2020-10-27 14:46:51,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 14:46:51,238 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2020-10-27 14:46:51,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:46:51,239 INFO L225 Difference]: With dead ends: 49 [2020-10-27 14:46:51,240 INFO L226 Difference]: Without dead ends: 36 [2020-10-27 14:46:51,240 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 14:46:51,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-27 14:46:51,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 26. [2020-10-27 14:46:51,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-27 14:46:51,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2020-10-27 14:46:51,249 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 18 [2020-10-27 14:46:51,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:46:51,249 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2020-10-27 14:46:51,249 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 14:46:51,249 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2020-10-27 14:46:51,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-27 14:46:51,250 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:46:51,251 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:46:51,251 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 14:46:51,251 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:46:51,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:46:51,252 INFO L82 PathProgramCache]: Analyzing trace with hash -917319019, now seen corresponding path program 1 times [2020-10-27 14:46:51,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:46:51,252 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1119309234] [2020-10-27 14:46:51,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:46:51,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:46:51,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:46:51,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:46:51,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:46:51,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:46:51,776 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:46:51,776 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-27 14:46:51,776 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:46:51,777 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 510 [2020-10-27 14:46:51,777 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:46:51,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 14:46:51,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 14:46:51,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:46:51,778 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:46:51,836 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:46:51,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:46:51,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:46:51,846 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:46:51,847 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:46:51,847 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:46:51,847 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 14:46:51,847 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:46:51,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:46:51,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:46:51,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:46:51,848 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:46:51,853 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:46:51,853 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1119309234] [2020-10-27 14:46:51,853 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:46:51,854 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 14:46:51,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224241628] [2020-10-27 14:46:51,854 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 14:46:51,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:46:51,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 14:46:51,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-27 14:46:51,856 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand 6 states. [2020-10-27 14:46:52,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:46:52,013 INFO L93 Difference]: Finished difference Result 56 states and 65 transitions. [2020-10-27 14:46:52,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 14:46:52,014 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2020-10-27 14:46:52,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:46:52,015 INFO L225 Difference]: With dead ends: 56 [2020-10-27 14:46:52,015 INFO L226 Difference]: Without dead ends: 43 [2020-10-27 14:46:52,016 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-27 14:46:52,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-27 14:46:52,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 29. [2020-10-27 14:46:52,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-27 14:46:52,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2020-10-27 14:46:52,024 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 21 [2020-10-27 14:46:52,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:46:52,024 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2020-10-27 14:46:52,024 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 14:46:52,025 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2020-10-27 14:46:52,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-27 14:46:52,025 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:46:52,025 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:46:52,026 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 14:46:52,026 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:46:52,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:46:52,027 INFO L82 PathProgramCache]: Analyzing trace with hash 238183726, now seen corresponding path program 2 times [2020-10-27 14:46:52,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:46:52,027 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1965753629] [2020-10-27 14:46:52,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:46:52,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:46:52,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:46:52,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:46:52,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:46:52,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:46:52,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:46:52,600 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:46:52,600 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-27 14:46:52,601 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 14:46:52,601 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 560 [2020-10-27 14:46:52,601 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:46:52,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 14:46:52,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 14:46:52,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-27 14:46:52,602 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:46:52,675 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:46:52,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:46:52,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:46:52,683 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:46:52,684 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:46:52,684 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:46:52,684 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 14:46:52,684 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:46:52,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:46:52,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:46:52,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:46:52,685 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:46:52,690 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:46:52,690 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1965753629] [2020-10-27 14:46:52,690 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:46:52,691 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 14:46:52,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726870684] [2020-10-27 14:46:52,691 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 14:46:52,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:46:52,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 14:46:52,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-27 14:46:52,693 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand 7 states. [2020-10-27 14:46:52,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:46:52,884 INFO L93 Difference]: Finished difference Result 63 states and 74 transitions. [2020-10-27 14:46:52,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 14:46:52,885 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 24 [2020-10-27 14:46:52,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:46:52,886 INFO L225 Difference]: With dead ends: 63 [2020-10-27 14:46:52,886 INFO L226 Difference]: Without dead ends: 50 [2020-10-27 14:46:52,887 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2020-10-27 14:46:52,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-27 14:46:52,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 32. [2020-10-27 14:46:52,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-27 14:46:52,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 37 transitions. [2020-10-27 14:46:52,894 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 37 transitions. Word has length 24 [2020-10-27 14:46:52,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:46:52,895 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 37 transitions. [2020-10-27 14:46:52,895 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 14:46:52,895 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 37 transitions. [2020-10-27 14:46:52,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-27 14:46:52,896 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:46:52,896 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:46:52,896 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 14:46:52,896 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:46:52,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:46:52,897 INFO L82 PathProgramCache]: Analyzing trace with hash -342417419, now seen corresponding path program 3 times [2020-10-27 14:46:52,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:46:52,898 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1352724168] [2020-10-27 14:46:52,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:46:52,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:46:52,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:46:52,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:46:52,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:46:53,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:46:53,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:46:53,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:46:53,663 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:46:53,663 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-27 14:46:53,663 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 14:46:53,663 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 753 [2020-10-27 14:46:53,664 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:46:53,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 14:46:53,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 14:46:53,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 14:46:53,664 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:46:53,735 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:46:53,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:46:53,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:46:53,743 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:46:53,743 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:46:53,744 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:46:53,744 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:46:53,744 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:46:53,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:46:53,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:46:53,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:46:53,745 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:46:53,749 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:46:53,750 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1352724168] [2020-10-27 14:46:53,750 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:46:53,750 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 14:46:53,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524086636] [2020-10-27 14:46:53,751 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 14:46:53,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:46:53,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 14:46:53,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-27 14:46:53,752 INFO L87 Difference]: Start difference. First operand 32 states and 37 transitions. Second operand 8 states. [2020-10-27 14:46:53,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:46:53,933 INFO L93 Difference]: Finished difference Result 70 states and 83 transitions. [2020-10-27 14:46:53,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 14:46:53,933 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 27 [2020-10-27 14:46:53,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:46:53,934 INFO L225 Difference]: With dead ends: 70 [2020-10-27 14:46:53,935 INFO L226 Difference]: Without dead ends: 57 [2020-10-27 14:46:53,935 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2020-10-27 14:46:53,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-27 14:46:53,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 35. [2020-10-27 14:46:53,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-27 14:46:53,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2020-10-27 14:46:53,942 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 27 [2020-10-27 14:46:53,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:46:53,943 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2020-10-27 14:46:53,943 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 14:46:53,943 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2020-10-27 14:46:53,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-27 14:46:53,944 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:46:53,944 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:46:53,944 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 14:46:53,944 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:46:53,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:46:53,945 INFO L82 PathProgramCache]: Analyzing trace with hash -1197827122, now seen corresponding path program 4 times [2020-10-27 14:46:53,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:46:53,946 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1801879679] [2020-10-27 14:46:53,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:46:53,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:46:53,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:46:53,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:46:54,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:46:54,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:46:54,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:46:54,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:46:54,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:46:55,317 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:46:55,317 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-27 14:46:55,317 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 14:46:55,318 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1359 [2020-10-27 14:46:55,318 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:46:55,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 14:46:55,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 14:46:55,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-27 14:46:55,318 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:46:55,400 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:46:55,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:46:55,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:46:55,408 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:46:55,408 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:46:55,408 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:46:55,408 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 14:46:55,409 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:46:55,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:46:55,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:46:55,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:46:55,409 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:46:55,414 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 9 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:46:55,415 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1801879679] [2020-10-27 14:46:55,415 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:46:55,415 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 14:46:55,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016282001] [2020-10-27 14:46:55,416 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 14:46:55,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:46:55,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 14:46:55,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-27 14:46:55,417 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand 9 states. [2020-10-27 14:46:55,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:46:55,660 INFO L93 Difference]: Finished difference Result 77 states and 92 transitions. [2020-10-27 14:46:55,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 14:46:55,661 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 30 [2020-10-27 14:46:55,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:46:55,662 INFO L225 Difference]: With dead ends: 77 [2020-10-27 14:46:55,662 INFO L226 Difference]: Without dead ends: 64 [2020-10-27 14:46:55,663 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2020-10-27 14:46:55,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-27 14:46:55,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 38. [2020-10-27 14:46:55,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-27 14:46:55,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 45 transitions. [2020-10-27 14:46:55,670 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 45 transitions. Word has length 30 [2020-10-27 14:46:55,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:46:55,671 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 45 transitions. [2020-10-27 14:46:55,671 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 14:46:55,671 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 45 transitions. [2020-10-27 14:46:55,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-27 14:46:55,672 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:46:55,672 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:46:55,672 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 14:46:55,673 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:46:55,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:46:55,673 INFO L82 PathProgramCache]: Analyzing trace with hash 1627645269, now seen corresponding path program 5 times [2020-10-27 14:46:55,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:46:55,674 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1482817815] [2020-10-27 14:46:55,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:46:55,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:46:55,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:46:55,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:46:55,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:46:55,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:46:55,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:46:55,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:46:56,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:46:56,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:46:58,322 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:46:58,323 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-27 14:46:58,323 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 14:46:58,323 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2636 [2020-10-27 14:46:58,323 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:46:58,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 14:46:58,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 14:46:58,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-27 14:46:58,324 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:46:58,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:46:58,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:46:58,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:46:58,417 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:46:58,417 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:46:58,417 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:46:58,418 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 14:46:58,418 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:46:58,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:46:58,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:46:58,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:46:58,418 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:46:58,424 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 11 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:46:58,425 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1482817815] [2020-10-27 14:46:58,425 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:46:58,425 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 14:46:58,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124223512] [2020-10-27 14:46:58,426 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 14:46:58,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:46:58,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 14:46:58,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-27 14:46:58,427 INFO L87 Difference]: Start difference. First operand 38 states and 45 transitions. Second operand 10 states. [2020-10-27 14:46:58,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:46:58,666 INFO L93 Difference]: Finished difference Result 84 states and 101 transitions. [2020-10-27 14:46:58,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 14:46:58,667 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 33 [2020-10-27 14:46:58,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:46:58,668 INFO L225 Difference]: With dead ends: 84 [2020-10-27 14:46:58,668 INFO L226 Difference]: Without dead ends: 71 [2020-10-27 14:46:58,669 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=62, Unknown=0, NotChecked=0, Total=110 [2020-10-27 14:46:58,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-27 14:46:58,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 41. [2020-10-27 14:46:58,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-27 14:46:58,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2020-10-27 14:46:58,677 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 33 [2020-10-27 14:46:58,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:46:58,677 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2020-10-27 14:46:58,677 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 14:46:58,677 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2020-10-27 14:46:58,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-27 14:46:58,678 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:46:58,679 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:46:58,679 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 14:46:58,679 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:46:58,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:46:58,680 INFO L82 PathProgramCache]: Analyzing trace with hash -1788388754, now seen corresponding path program 6 times [2020-10-27 14:46:58,680 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:46:58,680 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [489212656] [2020-10-27 14:46:58,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:46:58,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:46:58,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:46:58,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:46:58,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:46:58,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:46:58,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:46:58,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:46:58,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:46:59,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:00,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:02,256 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:47:02,256 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-27 14:47:02,256 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-27 14:47:02,256 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3562 [2020-10-27 14:47:02,256 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:47:02,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 14:47:02,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 14:47:02,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-27 14:47:02,258 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 14:47:02,369 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:47:02,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:47:02,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:02,377 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:47:02,377 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:47:02,377 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:47:02,378 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 14:47:02,378 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:47:02,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:47:02,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:47:02,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:47:02,378 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:47:02,385 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 13 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:47:02,386 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [489212656] [2020-10-27 14:47:02,386 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:47:02,386 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 14:47:02,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169210923] [2020-10-27 14:47:02,388 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 14:47:02,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:47:02,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 14:47:02,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-27 14:47:02,389 INFO L87 Difference]: Start difference. First operand 41 states and 49 transitions. Second operand 11 states. [2020-10-27 14:47:02,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:47:02,651 INFO L93 Difference]: Finished difference Result 91 states and 110 transitions. [2020-10-27 14:47:02,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 14:47:02,652 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 36 [2020-10-27 14:47:02,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:47:02,653 INFO L225 Difference]: With dead ends: 91 [2020-10-27 14:47:02,654 INFO L226 Difference]: Without dead ends: 78 [2020-10-27 14:47:02,654 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=74, Unknown=0, NotChecked=0, Total=132 [2020-10-27 14:47:02,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-27 14:47:02,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 44. [2020-10-27 14:47:02,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-27 14:47:02,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 53 transitions. [2020-10-27 14:47:02,668 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 53 transitions. Word has length 36 [2020-10-27 14:47:02,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:47:02,669 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 53 transitions. [2020-10-27 14:47:02,669 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 14:47:02,671 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 53 transitions. [2020-10-27 14:47:02,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-27 14:47:02,672 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:47:02,676 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:47:02,676 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 14:47:02,677 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:47:02,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:47:02,677 INFO L82 PathProgramCache]: Analyzing trace with hash 392110773, now seen corresponding path program 7 times [2020-10-27 14:47:02,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:47:02,678 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1806295540] [2020-10-27 14:47:02,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:47:02,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:47:02,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:02,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:02,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:02,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:02,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:02,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:03,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:03,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:04,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:04,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:06,731 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:47:06,731 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-27 14:47:06,731 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-27 14:47:06,731 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4038 [2020-10-27 14:47:06,731 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:47:06,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 14:47:06,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 14:47:06,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-27 14:47:06,732 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:47:06,863 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:47:06,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:47:06,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:06,876 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:47:06,876 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:47:06,876 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:47:06,876 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 14:47:06,877 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:47:06,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:47:06,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:47:06,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:47:06,877 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:47:06,884 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 15 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:47:06,885 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1806295540] [2020-10-27 14:47:06,885 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:47:06,885 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 14:47:06,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533284430] [2020-10-27 14:47:06,887 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 14:47:06,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:47:06,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 14:47:06,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-27 14:47:06,888 INFO L87 Difference]: Start difference. First operand 44 states and 53 transitions. Second operand 12 states. [2020-10-27 14:47:07,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:47:07,187 INFO L93 Difference]: Finished difference Result 98 states and 119 transitions. [2020-10-27 14:47:07,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 14:47:07,188 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 39 [2020-10-27 14:47:07,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:47:07,190 INFO L225 Difference]: With dead ends: 98 [2020-10-27 14:47:07,190 INFO L226 Difference]: Without dead ends: 85 [2020-10-27 14:47:07,191 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=87, Unknown=0, NotChecked=0, Total=156 [2020-10-27 14:47:07,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-27 14:47:07,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 47. [2020-10-27 14:47:07,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-27 14:47:07,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 57 transitions. [2020-10-27 14:47:07,209 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 57 transitions. Word has length 39 [2020-10-27 14:47:07,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:47:07,210 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 57 transitions. [2020-10-27 14:47:07,210 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 14:47:07,210 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 57 transitions. [2020-10-27 14:47:07,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-27 14:47:07,211 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:47:07,211 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:47:07,211 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 14:47:07,211 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:47:07,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:47:07,214 INFO L82 PathProgramCache]: Analyzing trace with hash -1726832370, now seen corresponding path program 8 times [2020-10-27 14:47:07,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:47:07,214 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [273862638] [2020-10-27 14:47:07,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:47:07,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:47:07,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:07,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:07,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:07,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:07,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:07,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:07,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:07,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:08,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:08,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:08,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:11,318 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:47:11,319 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-27 14:47:11,319 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-27 14:47:11,319 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4084 [2020-10-27 14:47:11,319 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:47:11,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 14:47:11,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 14:47:11,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-27 14:47:11,320 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:47:11,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:47:11,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:47:11,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:11,501 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:47:11,502 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:47:11,502 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:47:11,502 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 14:47:11,502 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:47:11,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:47:11,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:47:11,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:47:11,503 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:47:11,511 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 17 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:47:11,511 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [273862638] [2020-10-27 14:47:11,511 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:47:11,512 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 14:47:11,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023770419] [2020-10-27 14:47:11,512 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 14:47:11,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:47:11,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 14:47:11,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-27 14:47:11,514 INFO L87 Difference]: Start difference. First operand 47 states and 57 transitions. Second operand 13 states. [2020-10-27 14:47:11,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:47:11,898 INFO L93 Difference]: Finished difference Result 105 states and 128 transitions. [2020-10-27 14:47:11,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 14:47:11,898 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 42 [2020-10-27 14:47:11,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:47:11,900 INFO L225 Difference]: With dead ends: 105 [2020-10-27 14:47:11,900 INFO L226 Difference]: Without dead ends: 92 [2020-10-27 14:47:11,901 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=101, Unknown=0, NotChecked=0, Total=182 [2020-10-27 14:47:11,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-27 14:47:11,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 50. [2020-10-27 14:47:11,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-27 14:47:11,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 61 transitions. [2020-10-27 14:47:11,917 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 61 transitions. Word has length 42 [2020-10-27 14:47:11,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:47:11,918 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 61 transitions. [2020-10-27 14:47:11,918 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 14:47:11,918 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 61 transitions. [2020-10-27 14:47:11,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-27 14:47:11,919 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:47:11,919 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:47:11,919 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 14:47:11,919 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:47:11,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:47:11,920 INFO L82 PathProgramCache]: Analyzing trace with hash 267311125, now seen corresponding path program 9 times [2020-10-27 14:47:11,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:47:11,920 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1388552549] [2020-10-27 14:47:11,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:47:11,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:47:11,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:11,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:11,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:11,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:12,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:12,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:12,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:12,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:12,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:12,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:15,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:16,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:16,944 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:47:16,944 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-27 14:47:16,945 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-27 14:47:16,945 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-27 14:47:16,945 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:47:16,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 14:47:16,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 14:47:16,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-27 14:47:16,946 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:47:17,154 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:47:17,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:47:17,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:17,162 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:47:17,163 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:47:17,163 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:47:17,163 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 14:47:17,163 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:47:17,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:47:17,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:47:17,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:47:17,164 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:47:17,171 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 19 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:47:17,172 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1388552549] [2020-10-27 14:47:17,172 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:47:17,172 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 14:47:17,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692238078] [2020-10-27 14:47:17,173 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 14:47:17,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:47:17,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 14:47:17,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-27 14:47:17,174 INFO L87 Difference]: Start difference. First operand 50 states and 61 transitions. Second operand 14 states. [2020-10-27 14:47:17,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:47:17,550 INFO L93 Difference]: Finished difference Result 112 states and 137 transitions. [2020-10-27 14:47:17,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 14:47:17,550 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 45 [2020-10-27 14:47:17,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:47:17,552 INFO L225 Difference]: With dead ends: 112 [2020-10-27 14:47:17,552 INFO L226 Difference]: Without dead ends: 99 [2020-10-27 14:47:17,553 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=94, Invalid=116, Unknown=0, NotChecked=0, Total=210 [2020-10-27 14:47:17,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-27 14:47:17,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 53. [2020-10-27 14:47:17,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-27 14:47:17,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 65 transitions. [2020-10-27 14:47:17,560 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 65 transitions. Word has length 45 [2020-10-27 14:47:17,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:47:17,561 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 65 transitions. [2020-10-27 14:47:17,561 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 14:47:17,561 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 65 transitions. [2020-10-27 14:47:17,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-27 14:47:17,562 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:47:17,562 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:47:17,562 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 14:47:17,562 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:47:17,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:47:17,563 INFO L82 PathProgramCache]: Analyzing trace with hash -191467602, now seen corresponding path program 10 times [2020-10-27 14:47:17,563 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:47:17,563 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [30906882] [2020-10-27 14:47:17,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:47:17,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:47:17,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:17,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:17,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:17,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:17,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:17,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:18,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:18,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:18,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:18,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:18,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:18,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:19,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:22,117 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:47:22,118 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-27 14:47:22,118 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-27 14:47:22,118 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4536 [2020-10-27 14:47:22,118 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:47:22,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 14:47:22,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 14:47:22,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-27 14:47:22,119 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:47:22,319 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:47:22,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:47:22,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:22,330 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:47:22,331 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:47:22,331 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:47:22,331 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 14:47:22,331 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:47:22,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:47:22,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:47:22,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:47:22,332 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:47:22,342 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 21 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:47:22,342 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [30906882] [2020-10-27 14:47:22,343 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:47:22,343 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 14:47:22,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531839090] [2020-10-27 14:47:22,343 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 14:47:22,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:47:22,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 14:47:22,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-27 14:47:22,349 INFO L87 Difference]: Start difference. First operand 53 states and 65 transitions. Second operand 15 states. [2020-10-27 14:47:22,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:47:22,827 INFO L93 Difference]: Finished difference Result 119 states and 146 transitions. [2020-10-27 14:47:22,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 14:47:22,828 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 48 [2020-10-27 14:47:22,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:47:22,829 INFO L225 Difference]: With dead ends: 119 [2020-10-27 14:47:22,829 INFO L226 Difference]: Without dead ends: 106 [2020-10-27 14:47:22,830 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=108, Invalid=132, Unknown=0, NotChecked=0, Total=240 [2020-10-27 14:47:22,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-27 14:47:22,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 56. [2020-10-27 14:47:22,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-27 14:47:22,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 69 transitions. [2020-10-27 14:47:22,838 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 69 transitions. Word has length 48 [2020-10-27 14:47:22,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:47:22,839 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 69 transitions. [2020-10-27 14:47:22,839 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 14:47:22,839 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 69 transitions. [2020-10-27 14:47:22,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-27 14:47:22,840 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:47:22,840 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:47:22,840 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 14:47:22,840 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:47:22,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:47:22,841 INFO L82 PathProgramCache]: Analyzing trace with hash -1082587787, now seen corresponding path program 11 times [2020-10-27 14:47:22,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:47:22,841 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1716946567] [2020-10-27 14:47:22,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:47:22,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:47:22,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:22,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:23,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:23,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:23,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:23,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:23,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:23,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:23,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:23,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:23,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:23,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:23,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:27,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:27,791 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:47:27,792 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-27 14:47:27,792 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-27 14:47:27,792 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4937 [2020-10-27 14:47:27,792 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:47:27,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 14:47:27,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 14:47:27,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-27 14:47:27,793 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:47:28,057 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:47:28,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:47:28,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:28,064 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:47:28,065 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:47:28,065 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:47:28,065 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:47:28,065 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:47:28,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:47:28,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:47:28,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:47:28,066 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:47:28,073 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 23 proven. 187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:47:28,073 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1716946567] [2020-10-27 14:47:28,074 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:47:28,074 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 14:47:28,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19036745] [2020-10-27 14:47:28,074 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 14:47:28,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:47:28,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 14:47:28,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-27 14:47:28,076 INFO L87 Difference]: Start difference. First operand 56 states and 69 transitions. Second operand 16 states. [2020-10-27 14:47:28,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:47:28,646 INFO L93 Difference]: Finished difference Result 126 states and 155 transitions. [2020-10-27 14:47:28,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 14:47:28,647 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 51 [2020-10-27 14:47:28,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:47:28,649 INFO L225 Difference]: With dead ends: 126 [2020-10-27 14:47:28,650 INFO L226 Difference]: Without dead ends: 113 [2020-10-27 14:47:28,650 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=123, Invalid=149, Unknown=0, NotChecked=0, Total=272 [2020-10-27 14:47:28,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-27 14:47:28,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 59. [2020-10-27 14:47:28,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-27 14:47:28,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 73 transitions. [2020-10-27 14:47:28,658 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 73 transitions. Word has length 51 [2020-10-27 14:47:28,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:47:28,659 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 73 transitions. [2020-10-27 14:47:28,659 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 14:47:28,659 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 73 transitions. [2020-10-27 14:47:28,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-27 14:47:28,659 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:47:28,660 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:47:28,660 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 14:47:28,660 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:47:28,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:47:28,661 INFO L82 PathProgramCache]: Analyzing trace with hash -1251162546, now seen corresponding path program 12 times [2020-10-27 14:47:28,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:47:28,661 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1145635560] [2020-10-27 14:47:28,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:47:28,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:47:28,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:28,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:28,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:28,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:28,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:28,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:28,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:28,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:28,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:28,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:29,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:29,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:30,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:30,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:33,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:33,678 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:47:33,678 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-27 14:47:33,679 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-27 14:47:33,679 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-27 14:47:33,679 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:47:33,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 14:47:33,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 14:47:33,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-27 14:47:33,679 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:47:33,909 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:47:33,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:47:33,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:33,919 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:47:33,919 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:47:33,919 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:47:33,919 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 14:47:33,919 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:47:33,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:47:33,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:47:33,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:47:33,920 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:47:33,926 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 25 proven. 222 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:47:33,927 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1145635560] [2020-10-27 14:47:33,927 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:47:33,927 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-27 14:47:33,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453801234] [2020-10-27 14:47:33,928 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-27 14:47:33,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:47:33,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-27 14:47:33,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-27 14:47:33,929 INFO L87 Difference]: Start difference. First operand 59 states and 73 transitions. Second operand 17 states. [2020-10-27 14:47:34,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:47:34,464 INFO L93 Difference]: Finished difference Result 133 states and 164 transitions. [2020-10-27 14:47:34,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 14:47:34,465 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 54 [2020-10-27 14:47:34,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:47:34,467 INFO L225 Difference]: With dead ends: 133 [2020-10-27 14:47:34,467 INFO L226 Difference]: Without dead ends: 120 [2020-10-27 14:47:34,468 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=139, Invalid=167, Unknown=0, NotChecked=0, Total=306 [2020-10-27 14:47:34,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-27 14:47:34,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 62. [2020-10-27 14:47:34,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-27 14:47:34,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 77 transitions. [2020-10-27 14:47:34,477 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 77 transitions. Word has length 54 [2020-10-27 14:47:34,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:47:34,477 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 77 transitions. [2020-10-27 14:47:34,477 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-27 14:47:34,478 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 77 transitions. [2020-10-27 14:47:34,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-27 14:47:34,478 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:47:34,478 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:47:34,479 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 14:47:34,479 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:47:34,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:47:34,479 INFO L82 PathProgramCache]: Analyzing trace with hash 1849928405, now seen corresponding path program 13 times [2020-10-27 14:47:34,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:47:34,480 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [161749881] [2020-10-27 14:47:34,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:47:34,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:47:34,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:34,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:34,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:34,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:34,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:34,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:34,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:35,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:35,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:35,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:35,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:35,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:35,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:35,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:36,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:38,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:39,497 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:47:39,497 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-27 14:47:39,497 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-27 14:47:39,498 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-27 14:47:39,498 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:47:39,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-27 14:47:39,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 14:47:39,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-27 14:47:39,498 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:47:39,760 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:47:39,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:47:39,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:39,768 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:47:39,768 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:47:39,768 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:47:39,768 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:47:39,768 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:47:39,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:47:39,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:47:39,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:47:39,769 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:47:39,774 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 27 proven. 260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:47:39,775 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [161749881] [2020-10-27 14:47:39,775 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:47:39,775 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-27 14:47:39,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224506301] [2020-10-27 14:47:39,776 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-27 14:47:39,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:47:39,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-27 14:47:39,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-27 14:47:39,777 INFO L87 Difference]: Start difference. First operand 62 states and 77 transitions. Second operand 18 states. [2020-10-27 14:47:40,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:47:40,344 INFO L93 Difference]: Finished difference Result 140 states and 173 transitions. [2020-10-27 14:47:40,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 14:47:40,350 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 57 [2020-10-27 14:47:40,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:47:40,352 INFO L225 Difference]: With dead ends: 140 [2020-10-27 14:47:40,352 INFO L226 Difference]: Without dead ends: 127 [2020-10-27 14:47:40,353 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=156, Invalid=186, Unknown=0, NotChecked=0, Total=342 [2020-10-27 14:47:40,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-10-27 14:47:40,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 65. [2020-10-27 14:47:40,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-27 14:47:40,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 81 transitions. [2020-10-27 14:47:40,360 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 81 transitions. Word has length 57 [2020-10-27 14:47:40,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:47:40,360 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 81 transitions. [2020-10-27 14:47:40,361 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-27 14:47:40,361 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 81 transitions. [2020-10-27 14:47:40,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-27 14:47:40,361 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:47:40,361 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:47:40,362 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-27 14:47:40,362 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:47:40,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:47:40,362 INFO L82 PathProgramCache]: Analyzing trace with hash 1703912686, now seen corresponding path program 14 times [2020-10-27 14:47:40,362 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:47:40,363 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2016245469] [2020-10-27 14:47:40,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:47:40,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:47:40,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:40,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:40,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:40,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:40,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:40,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:40,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:40,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:40,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:40,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:40,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:40,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:41,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:41,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:41,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:43,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:45,382 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:47:45,382 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-27 14:47:45,382 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-27 14:47:45,382 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-27 14:47:45,382 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:47:45,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-27 14:47:45,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 14:47:45,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-27 14:47:45,383 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:47:45,696 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:47:45,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:47:45,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:45,706 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:47:45,706 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:47:45,707 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:47:45,707 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 14:47:45,707 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:47:45,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:47:45,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:47:45,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:47:45,708 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:47:45,720 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 29 proven. 301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:47:45,720 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2016245469] [2020-10-27 14:47:45,720 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:47:45,720 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-27 14:47:45,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546190627] [2020-10-27 14:47:45,721 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-27 14:47:45,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:47:45,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-27 14:47:45,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-27 14:47:45,734 INFO L87 Difference]: Start difference. First operand 65 states and 81 transitions. Second operand 19 states. [2020-10-27 14:47:46,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:47:46,332 INFO L93 Difference]: Finished difference Result 147 states and 182 transitions. [2020-10-27 14:47:46,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 14:47:46,333 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 60 [2020-10-27 14:47:46,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:47:46,334 INFO L225 Difference]: With dead ends: 147 [2020-10-27 14:47:46,335 INFO L226 Difference]: Without dead ends: 134 [2020-10-27 14:47:46,335 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=174, Invalid=206, Unknown=0, NotChecked=0, Total=380 [2020-10-27 14:47:46,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-10-27 14:47:46,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 68. [2020-10-27 14:47:46,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-27 14:47:46,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 85 transitions. [2020-10-27 14:47:46,343 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 85 transitions. Word has length 60 [2020-10-27 14:47:46,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:47:46,343 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 85 transitions. [2020-10-27 14:47:46,343 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-27 14:47:46,343 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 85 transitions. [2020-10-27 14:47:46,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-27 14:47:46,344 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:47:46,344 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:47:46,344 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-27 14:47:46,344 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:47:46,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:47:46,345 INFO L82 PathProgramCache]: Analyzing trace with hash -1743468491, now seen corresponding path program 15 times [2020-10-27 14:47:46,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:47:46,346 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1402482590] [2020-10-27 14:47:46,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:47:46,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:47:46,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:46,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:46,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:46,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:46,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:46,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:46,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:47,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:47,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:47,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:47,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:47,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:47,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:47,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:47,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:48,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:48,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:51,361 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:47:51,362 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-27 14:47:51,362 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 17 [2020-10-27 14:47:51,362 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-27 14:47:51,362 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:47:51,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-27 14:47:51,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 14:47:51,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-27 14:47:51,362 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:47:51,667 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:47:51,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:47:51,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:51,676 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:47:51,676 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:47:51,676 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:47:51,676 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:47:51,677 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:47:51,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:47:51,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:47:51,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:47:51,677 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:47:51,686 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 31 proven. 345 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:47:51,694 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1402482590] [2020-10-27 14:47:51,694 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:47:51,695 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-27 14:47:51,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078042749] [2020-10-27 14:47:51,698 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-27 14:47:51,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:47:51,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-27 14:47:51,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-27 14:47:51,703 INFO L87 Difference]: Start difference. First operand 68 states and 85 transitions. Second operand 20 states. [2020-10-27 14:47:52,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:47:52,216 INFO L93 Difference]: Finished difference Result 154 states and 191 transitions. [2020-10-27 14:47:52,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-27 14:47:52,217 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 63 [2020-10-27 14:47:52,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:47:52,218 INFO L225 Difference]: With dead ends: 154 [2020-10-27 14:47:52,218 INFO L226 Difference]: Without dead ends: 141 [2020-10-27 14:47:52,219 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=193, Invalid=227, Unknown=0, NotChecked=0, Total=420 [2020-10-27 14:47:52,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-10-27 14:47:52,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 71. [2020-10-27 14:47:52,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-27 14:47:52,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 89 transitions. [2020-10-27 14:47:52,226 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 89 transitions. Word has length 63 [2020-10-27 14:47:52,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:47:52,226 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 89 transitions. [2020-10-27 14:47:52,226 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-27 14:47:52,226 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 89 transitions. [2020-10-27 14:47:52,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-27 14:47:52,227 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:47:52,227 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:47:52,227 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-27 14:47:52,227 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:47:52,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:47:52,228 INFO L82 PathProgramCache]: Analyzing trace with hash -1418130546, now seen corresponding path program 16 times [2020-10-27 14:47:52,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:47:52,228 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1669720644] [2020-10-27 14:47:52,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:47:52,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:47:52,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:52,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:52,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:52,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:52,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:52,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:52,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:52,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:52,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:52,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:54,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:54,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:54,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:54,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:55,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:55,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:55,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:55,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:57,243 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:47:57,243 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-27 14:47:57,243 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 18 [2020-10-27 14:47:57,243 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-27 14:47:57,243 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:47:57,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-27 14:47:57,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 14:47:57,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-27 14:47:57,243 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:47:57,554 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:47:57,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:47:57,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:57,562 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:47:57,562 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:47:57,562 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:47:57,562 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 14:47:57,563 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:47:57,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:47:57,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:47:57,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:47:57,564 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 14:47:57,571 INFO L134 CoverageAnalysis]: Checked inductivity of 425 backedges. 33 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:47:57,572 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1669720644] [2020-10-27 14:47:57,572 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:47:57,572 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-27 14:47:57,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155927275] [2020-10-27 14:47:57,574 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-27 14:47:57,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:47:57,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-27 14:47:57,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-27 14:47:57,576 INFO L87 Difference]: Start difference. First operand 71 states and 89 transitions. Second operand 21 states. [2020-10-27 14:47:58,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:47:58,192 INFO L93 Difference]: Finished difference Result 161 states and 200 transitions. [2020-10-27 14:47:58,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-27 14:47:58,193 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 66 [2020-10-27 14:47:58,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:47:58,194 INFO L225 Difference]: With dead ends: 161 [2020-10-27 14:47:58,195 INFO L226 Difference]: Without dead ends: 148 [2020-10-27 14:47:58,195 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=213, Invalid=249, Unknown=0, NotChecked=0, Total=462 [2020-10-27 14:47:58,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-10-27 14:47:58,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 74. [2020-10-27 14:47:58,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-27 14:47:58,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 93 transitions. [2020-10-27 14:47:58,202 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 93 transitions. Word has length 66 [2020-10-27 14:47:58,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:47:58,202 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 93 transitions. [2020-10-27 14:47:58,202 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-27 14:47:58,203 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 93 transitions. [2020-10-27 14:47:58,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-27 14:47:58,203 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:47:58,203 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:47:58,203 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-27 14:47:58,204 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:47:58,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:47:58,204 INFO L82 PathProgramCache]: Analyzing trace with hash 1278369173, now seen corresponding path program 17 times [2020-10-27 14:47:58,204 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:47:58,204 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1286419630] [2020-10-27 14:47:58,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:47:58,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:47:58,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:58,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:58,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:58,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:58,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:58,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:58,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:58,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:58,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:58,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:59,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:59,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:59,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:59,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:59,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:59,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:59,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:59,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:00,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:03,220 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:48:03,220 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-27 14:48:03,220 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 19 [2020-10-27 14:48:03,220 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-27 14:48:03,220 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:48:03,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-27 14:48:03,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 14:48:03,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-27 14:48:03,220 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:48:03,574 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:48:03,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:48:03,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:03,580 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:48:03,581 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:48:03,581 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:48:03,581 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:48:03,581 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:48:03,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:48:03,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:48:03,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:48:03,581 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:48:03,587 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 35 proven. 442 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:48:03,588 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1286419630] [2020-10-27 14:48:03,588 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:48:03,588 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-27 14:48:03,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362057443] [2020-10-27 14:48:03,588 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-27 14:48:03,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:48:03,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-27 14:48:03,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-27 14:48:03,590 INFO L87 Difference]: Start difference. First operand 74 states and 93 transitions. Second operand 22 states. [2020-10-27 14:48:04,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:48:04,325 INFO L93 Difference]: Finished difference Result 168 states and 209 transitions. [2020-10-27 14:48:04,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-27 14:48:04,326 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 69 [2020-10-27 14:48:04,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:48:04,328 INFO L225 Difference]: With dead ends: 168 [2020-10-27 14:48:04,328 INFO L226 Difference]: Without dead ends: 155 [2020-10-27 14:48:04,329 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=234, Invalid=272, Unknown=0, NotChecked=0, Total=506 [2020-10-27 14:48:04,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-10-27 14:48:04,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 77. [2020-10-27 14:48:04,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-27 14:48:04,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 97 transitions. [2020-10-27 14:48:04,339 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 97 transitions. Word has length 69 [2020-10-27 14:48:04,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:48:04,339 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 97 transitions. [2020-10-27 14:48:04,339 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-27 14:48:04,339 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 97 transitions. [2020-10-27 14:48:04,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-27 14:48:04,340 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:48:04,340 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:48:04,340 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-27 14:48:04,340 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:48:04,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:48:04,341 INFO L82 PathProgramCache]: Analyzing trace with hash -366806482, now seen corresponding path program 18 times [2020-10-27 14:48:04,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:48:04,342 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1477785546] [2020-10-27 14:48:04,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:48:04,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:48:04,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:04,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:04,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:04,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:04,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:04,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:04,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:04,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:04,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:04,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:04,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:04,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:04,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:05,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:06,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:06,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:07,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:09,364 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:48:09,364 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-27 14:48:09,364 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 17 [2020-10-27 14:48:09,364 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-27 14:48:09,364 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:48:09,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 14:48:09,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 14:48:09,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-27 14:48:09,365 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:48:09,705 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:48:09,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:48:09,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:09,711 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:48:09,711 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:48:09,711 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:48:09,711 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:48:09,711 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:48:09,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:48:09,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:48:09,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:48:09,712 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:48:09,724 INFO L134 CoverageAnalysis]: Checked inductivity of 532 backedges. 232 proven. 260 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-10-27 14:48:09,724 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1477785546] [2020-10-27 14:48:09,724 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:48:09,725 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-27 14:48:09,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552973830] [2020-10-27 14:48:09,725 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-27 14:48:09,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:48:09,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-27 14:48:09,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2020-10-27 14:48:09,726 INFO L87 Difference]: Start difference. First operand 77 states and 97 transitions. Second operand 17 states. [2020-10-27 14:48:11,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:48:11,054 INFO L93 Difference]: Finished difference Result 242 states and 308 transitions. [2020-10-27 14:48:11,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 14:48:11,054 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 72 [2020-10-27 14:48:11,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:48:11,056 INFO L225 Difference]: With dead ends: 242 [2020-10-27 14:48:11,057 INFO L226 Difference]: Without dead ends: 173 [2020-10-27 14:48:11,058 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=35, Invalid=271, Unknown=0, NotChecked=0, Total=306 [2020-10-27 14:48:11,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-10-27 14:48:11,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 116. [2020-10-27 14:48:11,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-10-27 14:48:11,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 135 transitions. [2020-10-27 14:48:11,066 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 135 transitions. Word has length 72 [2020-10-27 14:48:11,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:48:11,067 INFO L481 AbstractCegarLoop]: Abstraction has 116 states and 135 transitions. [2020-10-27 14:48:11,067 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-27 14:48:11,067 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 135 transitions. [2020-10-27 14:48:11,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-10-27 14:48:11,068 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:48:11,068 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 18, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:48:11,068 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-27 14:48:11,068 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:48:11,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:48:11,069 INFO L82 PathProgramCache]: Analyzing trace with hash -760875085, now seen corresponding path program 19 times [2020-10-27 14:48:11,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:48:11,070 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2100788322] [2020-10-27 14:48:11,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:48:11,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:48:11,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:11,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:11,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:11,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:11,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:11,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:11,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:11,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:11,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:16,096 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:48:16,096 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 121 [2020-10-27 14:48:16,096 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-27 14:48:16,097 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-27 14:48:16,097 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:48:16,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-27 14:48:16,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 52 [2020-10-27 14:48:16,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-27 14:48:16,097 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:48:16,494 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:48:16,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:48:16,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:16,499 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:48:16,499 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:48:16,499 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:48:16,499 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:48:16,499 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:48:16,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:48:16,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:48:16,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:48:16,500 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:48:16,516 INFO L134 CoverageAnalysis]: Checked inductivity of 1520 backedges. 765 proven. 495 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2020-10-27 14:48:16,516 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2100788322] [2020-10-27 14:48:16,517 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:48:16,517 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-27 14:48:16,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405305477] [2020-10-27 14:48:16,517 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-27 14:48:16,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:48:16,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-27 14:48:16,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-27 14:48:16,518 INFO L87 Difference]: Start difference. First operand 116 states and 135 transitions. Second operand 23 states. [2020-10-27 14:48:17,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:48:17,275 INFO L93 Difference]: Finished difference Result 214 states and 256 transitions. [2020-10-27 14:48:17,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-27 14:48:17,278 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 111 [2020-10-27 14:48:17,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:48:17,280 INFO L225 Difference]: With dead ends: 214 [2020-10-27 14:48:17,280 INFO L226 Difference]: Without dead ends: 201 [2020-10-27 14:48:17,281 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=256, Invalid=296, Unknown=0, NotChecked=0, Total=552 [2020-10-27 14:48:17,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2020-10-27 14:48:17,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 119. [2020-10-27 14:48:17,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-10-27 14:48:17,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 139 transitions. [2020-10-27 14:48:17,290 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 139 transitions. Word has length 111 [2020-10-27 14:48:17,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:48:17,290 INFO L481 AbstractCegarLoop]: Abstraction has 119 states and 139 transitions. [2020-10-27 14:48:17,290 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-27 14:48:17,290 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 139 transitions. [2020-10-27 14:48:17,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-10-27 14:48:17,291 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:48:17,291 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 19, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:48:17,291 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-27 14:48:17,292 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:48:17,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:48:17,292 INFO L82 PathProgramCache]: Analyzing trace with hash 819905360, now seen corresponding path program 20 times [2020-10-27 14:48:17,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:48:17,292 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1330033924] [2020-10-27 14:48:17,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:48:17,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:48:17,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:17,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:17,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:17,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:17,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:17,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:17,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:17,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:17,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:17,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:17,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:22,320 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:48:22,320 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 124 [2020-10-27 14:48:22,320 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-27 14:48:22,321 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-27 14:48:22,321 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:48:22,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-27 14:48:22,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 52 [2020-10-27 14:48:22,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-27 14:48:22,321 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:48:22,756 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:48:22,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:48:22,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:22,762 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:48:22,762 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:48:22,762 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:48:22,762 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:48:22,762 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:48:22,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:48:22,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:48:22,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:48:22,763 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:48:22,778 INFO L134 CoverageAnalysis]: Checked inductivity of 1617 backedges. 806 proven. 551 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2020-10-27 14:48:22,779 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1330033924] [2020-10-27 14:48:22,779 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:48:22,779 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-27 14:48:22,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407683347] [2020-10-27 14:48:22,780 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-27 14:48:22,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:48:22,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-27 14:48:22,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-27 14:48:22,781 INFO L87 Difference]: Start difference. First operand 119 states and 139 transitions. Second operand 24 states. [2020-10-27 14:48:23,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:48:23,461 INFO L93 Difference]: Finished difference Result 221 states and 265 transitions. [2020-10-27 14:48:23,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-27 14:48:23,462 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 114 [2020-10-27 14:48:23,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:48:23,464 INFO L225 Difference]: With dead ends: 221 [2020-10-27 14:48:23,464 INFO L226 Difference]: Without dead ends: 208 [2020-10-27 14:48:23,465 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=279, Invalid=321, Unknown=0, NotChecked=0, Total=600 [2020-10-27 14:48:23,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-10-27 14:48:23,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 122. [2020-10-27 14:48:23,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-10-27 14:48:23,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 143 transitions. [2020-10-27 14:48:23,474 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 143 transitions. Word has length 114 [2020-10-27 14:48:23,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:48:23,474 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 143 transitions. [2020-10-27 14:48:23,474 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-27 14:48:23,474 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 143 transitions. [2020-10-27 14:48:23,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-10-27 14:48:23,476 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:48:23,476 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 20, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:48:23,476 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-27 14:48:23,476 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:48:23,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:48:23,476 INFO L82 PathProgramCache]: Analyzing trace with hash -466258285, now seen corresponding path program 21 times [2020-10-27 14:48:23,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:48:23,477 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [889177201] [2020-10-27 14:48:23,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:48:23,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:48:23,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:23,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:23,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:23,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:23,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:26,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:26,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:26,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:26,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:28,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:28,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:28,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:28,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:28,520 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:48:28,520 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 127 [2020-10-27 14:48:28,520 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-27 14:48:28,520 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5020 [2020-10-27 14:48:28,520 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:48:28,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-27 14:48:28,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 52 [2020-10-27 14:48:28,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-10-27 14:48:28,521 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:48:28,984 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:48:28,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:48:28,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:28,990 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:48:28,990 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:48:28,991 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:48:28,991 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:48:28,991 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:48:28,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:48:28,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:48:28,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:48:28,991 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:48:29,005 INFO L134 CoverageAnalysis]: Checked inductivity of 1717 backedges. 847 proven. 610 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2020-10-27 14:48:29,006 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [889177201] [2020-10-27 14:48:29,006 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:48:29,006 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-27 14:48:29,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769023486] [2020-10-27 14:48:29,006 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-27 14:48:29,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:48:29,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-27 14:48:29,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-27 14:48:29,008 INFO L87 Difference]: Start difference. First operand 122 states and 143 transitions. Second operand 25 states. [2020-10-27 14:48:29,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:48:29,718 INFO L93 Difference]: Finished difference Result 228 states and 274 transitions. [2020-10-27 14:48:29,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-27 14:48:29,719 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 117 [2020-10-27 14:48:29,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:48:29,722 INFO L225 Difference]: With dead ends: 228 [2020-10-27 14:48:29,722 INFO L226 Difference]: Without dead ends: 215 [2020-10-27 14:48:29,723 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=303, Invalid=347, Unknown=0, NotChecked=0, Total=650 [2020-10-27 14:48:29,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2020-10-27 14:48:29,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 125. [2020-10-27 14:48:29,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-10-27 14:48:29,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 147 transitions. [2020-10-27 14:48:29,738 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 147 transitions. Word has length 117 [2020-10-27 14:48:29,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:48:29,739 INFO L481 AbstractCegarLoop]: Abstraction has 125 states and 147 transitions. [2020-10-27 14:48:29,739 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-27 14:48:29,739 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 147 transitions. [2020-10-27 14:48:29,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2020-10-27 14:48:29,740 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:48:29,740 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 21, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:48:29,743 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-27 14:48:29,743 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:48:29,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:48:29,743 INFO L82 PathProgramCache]: Analyzing trace with hash -1164158864, now seen corresponding path program 22 times [2020-10-27 14:48:29,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:48:29,744 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1787651950] [2020-10-27 14:48:29,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:48:29,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:48:29,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:29,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:30,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:30,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:30,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:30,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:30,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:30,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:30,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:30,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:30,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:30,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:34,784 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:48:34,784 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 130 [2020-10-27 14:48:34,784 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-27 14:48:34,784 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-27 14:48:34,784 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:48:34,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-27 14:48:34,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 14:48:34,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 107 [2020-10-27 14:48:34,785 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:48:35,807 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:48:35,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:48:35,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:35,813 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:48:35,814 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:48:35,814 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:48:35,814 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:48:35,814 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:48:35,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:48:35,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:48:35,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:48:35,815 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:48:35,840 INFO L134 CoverageAnalysis]: Checked inductivity of 1820 backedges. 0 proven. 1820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:48:35,841 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1787651950] [2020-10-27 14:48:35,841 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:48:35,841 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-27 14:48:35,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248656090] [2020-10-27 14:48:35,842 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-27 14:48:35,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:48:35,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-27 14:48:35,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-27 14:48:35,843 INFO L87 Difference]: Start difference. First operand 125 states and 147 transitions. Second operand 39 states. [2020-10-27 14:48:37,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:48:37,099 INFO L93 Difference]: Finished difference Result 447 states and 560 transitions. [2020-10-27 14:48:37,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-27 14:48:37,100 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 120 [2020-10-27 14:48:37,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:48:37,102 INFO L225 Difference]: With dead ends: 447 [2020-10-27 14:48:37,102 INFO L226 Difference]: Without dead ends: 434 [2020-10-27 14:48:37,103 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=744, Invalid=816, Unknown=0, NotChecked=0, Total=1560 [2020-10-27 14:48:37,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2020-10-27 14:48:37,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 230. [2020-10-27 14:48:37,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 230 states. [2020-10-27 14:48:37,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 287 transitions. [2020-10-27 14:48:37,119 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 287 transitions. Word has length 120 [2020-10-27 14:48:37,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:48:37,120 INFO L481 AbstractCegarLoop]: Abstraction has 230 states and 287 transitions. [2020-10-27 14:48:37,120 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-27 14:48:37,120 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 287 transitions. [2020-10-27 14:48:37,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2020-10-27 14:48:37,122 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:48:37,122 INFO L422 BasicCegarLoop]: trace histogram [57, 57, 36, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:48:37,122 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-27 14:48:37,123 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:48:37,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:48:37,123 INFO L82 PathProgramCache]: Analyzing trace with hash -41232112, now seen corresponding path program 23 times [2020-10-27 14:48:37,123 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:48:37,123 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1799185141] [2020-10-27 14:48:37,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:48:37,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:48:37,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:37,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:37,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:38,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:38,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:38,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:38,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:38,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:38,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:38,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:38,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:38,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:38,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:39,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:39,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:39,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:39,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:42,161 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:48:42,162 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 196 [2020-10-27 14:48:42,162 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 17 [2020-10-27 14:48:42,162 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-27 14:48:42,162 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:48:42,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-27 14:48:42,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 118 [2020-10-27 14:48:42,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-27 14:48:42,163 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:48:42,676 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:48:42,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:48:42,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:42,684 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:48:42,684 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:48:42,684 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:48:42,684 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 14:48:42,684 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:48:42,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:48:42,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:48:42,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:48:42,685 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:48:42,735 INFO L134 CoverageAnalysis]: Checked inductivity of 4845 backedges. 2318 proven. 672 refuted. 0 times theorem prover too weak. 1855 trivial. 0 not checked. [2020-10-27 14:48:42,735 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1799185141] [2020-10-27 14:48:42,735 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:48:42,735 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-27 14:48:42,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923576538] [2020-10-27 14:48:42,737 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-27 14:48:42,738 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:48:42,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-27 14:48:42,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-27 14:48:42,739 INFO L87 Difference]: Start difference. First operand 230 states and 287 transitions. Second operand 26 states. [2020-10-27 14:48:43,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:48:43,657 INFO L93 Difference]: Finished difference Result 404 states and 508 transitions. [2020-10-27 14:48:43,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-27 14:48:43,657 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 186 [2020-10-27 14:48:43,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:48:43,660 INFO L225 Difference]: With dead ends: 404 [2020-10-27 14:48:43,660 INFO L226 Difference]: Without dead ends: 391 [2020-10-27 14:48:43,661 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=328, Invalid=374, Unknown=0, NotChecked=0, Total=702 [2020-10-27 14:48:43,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2020-10-27 14:48:43,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 233. [2020-10-27 14:48:43,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 233 states. [2020-10-27 14:48:43,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 291 transitions. [2020-10-27 14:48:43,677 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 291 transitions. Word has length 186 [2020-10-27 14:48:43,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:48:43,678 INFO L481 AbstractCegarLoop]: Abstraction has 233 states and 291 transitions. [2020-10-27 14:48:43,678 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-27 14:48:43,678 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 291 transitions. [2020-10-27 14:48:43,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2020-10-27 14:48:43,680 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:48:43,680 INFO L422 BasicCegarLoop]: trace histogram [58, 58, 36, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:48:43,680 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-27 14:48:43,681 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:48:43,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:48:43,681 INFO L82 PathProgramCache]: Analyzing trace with hash -773027629, now seen corresponding path program 24 times [2020-10-27 14:48:43,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:48:43,681 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1495752962] [2020-10-27 14:48:43,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:48:43,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:48:43,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:43,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:44,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:44,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:44,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:44,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:44,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:45,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:45,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:45,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:45,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:45,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:45,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:45,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:45,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:46,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:46,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:46,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:46,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:46,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:46,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:46,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:47,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:47,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:47,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:47,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:47,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:47,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:47,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:48,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:48,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:48,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:48,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:48,730 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:48:48,731 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 199 [2020-10-27 14:48:48,731 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 33 [2020-10-27 14:48:48,731 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-27 14:48:48,731 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:48:48,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-27 14:48:48,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 118 [2020-10-27 14:48:48,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 69 [2020-10-27 14:48:48,731 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:48:49,252 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:48:49,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:48:49,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:49,257 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:48:49,257 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:48:49,257 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:48:49,257 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:48:49,258 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:48:49,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:48:49,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:48:49,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:48:49,258 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:48:49,284 INFO L134 CoverageAnalysis]: Checked inductivity of 5017 backedges. 2425 proven. 737 refuted. 0 times theorem prover too weak. 1855 trivial. 0 not checked. [2020-10-27 14:48:49,284 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1495752962] [2020-10-27 14:48:49,284 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:48:49,284 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-27 14:48:49,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738799891] [2020-10-27 14:48:49,285 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-27 14:48:49,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:48:49,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-27 14:48:49,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-27 14:48:49,286 INFO L87 Difference]: Start difference. First operand 233 states and 291 transitions. Second operand 27 states. [2020-10-27 14:48:50,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:48:50,201 INFO L93 Difference]: Finished difference Result 414 states and 521 transitions. [2020-10-27 14:48:50,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-27 14:48:50,201 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 189 [2020-10-27 14:48:50,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:48:50,204 INFO L225 Difference]: With dead ends: 414 [2020-10-27 14:48:50,205 INFO L226 Difference]: Without dead ends: 401 [2020-10-27 14:48:50,205 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=354, Invalid=402, Unknown=0, NotChecked=0, Total=756 [2020-10-27 14:48:50,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2020-10-27 14:48:50,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 236. [2020-10-27 14:48:50,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 236 states. [2020-10-27 14:48:50,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 295 transitions. [2020-10-27 14:48:50,220 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 295 transitions. Word has length 189 [2020-10-27 14:48:50,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:48:50,220 INFO L481 AbstractCegarLoop]: Abstraction has 236 states and 295 transitions. [2020-10-27 14:48:50,220 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-27 14:48:50,220 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 295 transitions. [2020-10-27 14:48:50,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2020-10-27 14:48:50,223 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:48:50,223 INFO L422 BasicCegarLoop]: trace histogram [59, 59, 36, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:48:50,223 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-27 14:48:50,223 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:48:50,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:48:50,224 INFO L82 PathProgramCache]: Analyzing trace with hash -439280080, now seen corresponding path program 25 times [2020-10-27 14:48:50,224 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:48:50,224 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [288375020] [2020-10-27 14:48:50,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:48:50,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:48:50,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:50,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:50,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:51,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:51,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:54,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:54,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:54,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:55,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:55,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:55,263 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:48:55,263 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 202 [2020-10-27 14:48:55,264 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-27 14:48:55,264 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-27 14:48:55,264 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:48:55,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-27 14:48:55,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 118 [2020-10-27 14:48:55,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-27 14:48:55,264 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:48:55,842 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:48:55,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:48:55,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:55,851 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:48:55,851 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:48:55,852 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:48:55,852 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:48:55,852 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:48:55,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:48:55,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:48:55,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:48:55,853 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:48:55,895 INFO L134 CoverageAnalysis]: Checked inductivity of 5192 backedges. 2532 proven. 805 refuted. 0 times theorem prover too weak. 1855 trivial. 0 not checked. [2020-10-27 14:48:55,896 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [288375020] [2020-10-27 14:48:55,897 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:48:55,897 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-27 14:48:55,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456705989] [2020-10-27 14:48:55,897 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-27 14:48:55,898 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:48:55,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-27 14:48:55,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-27 14:48:55,900 INFO L87 Difference]: Start difference. First operand 236 states and 295 transitions. Second operand 28 states. [2020-10-27 14:48:56,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:48:56,697 INFO L93 Difference]: Finished difference Result 424 states and 534 transitions. [2020-10-27 14:48:56,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-27 14:48:56,698 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 192 [2020-10-27 14:48:56,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:48:56,703 INFO L225 Difference]: With dead ends: 424 [2020-10-27 14:48:56,703 INFO L226 Difference]: Without dead ends: 411 [2020-10-27 14:48:56,704 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=381, Invalid=431, Unknown=0, NotChecked=0, Total=812 [2020-10-27 14:48:56,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2020-10-27 14:48:56,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 239. [2020-10-27 14:48:56,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 239 states. [2020-10-27 14:48:56,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 299 transitions. [2020-10-27 14:48:56,721 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 299 transitions. Word has length 192 [2020-10-27 14:48:56,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:48:56,722 INFO L481 AbstractCegarLoop]: Abstraction has 239 states and 299 transitions. [2020-10-27 14:48:56,722 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-27 14:48:56,722 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 299 transitions. [2020-10-27 14:48:56,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2020-10-27 14:48:56,724 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:48:56,724 INFO L422 BasicCegarLoop]: trace histogram [60, 60, 36, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:48:56,725 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-27 14:48:56,725 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:48:56,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:48:56,725 INFO L82 PathProgramCache]: Analyzing trace with hash -615338061, now seen corresponding path program 26 times [2020-10-27 14:48:56,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:48:56,726 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [513284878] [2020-10-27 14:48:56,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:48:56,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:48:56,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:57,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:57,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:57,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:57,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:58,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:49:01,774 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:49:01,774 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 205 [2020-10-27 14:49:01,774 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 14:49:01,774 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-27 14:49:01,774 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:49:01,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-27 14:49:01,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 118 [2020-10-27 14:49:01,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-27 14:49:01,774 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:49:02,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:49:02,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:49:02,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:49:02,423 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:49:02,423 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:49:02,423 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:49:02,424 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:49:02,425 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:49:02,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:49:02,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:49:02,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:49:02,425 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:49:02,463 INFO L134 CoverageAnalysis]: Checked inductivity of 5370 backedges. 2639 proven. 876 refuted. 0 times theorem prover too weak. 1855 trivial. 0 not checked. [2020-10-27 14:49:02,464 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [513284878] [2020-10-27 14:49:02,464 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:49:02,464 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-27 14:49:02,466 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87368204] [2020-10-27 14:49:02,468 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-27 14:49:02,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:49:02,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-27 14:49:02,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-27 14:49:02,469 INFO L87 Difference]: Start difference. First operand 239 states and 299 transitions. Second operand 29 states. [2020-10-27 14:49:03,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:49:03,479 INFO L93 Difference]: Finished difference Result 434 states and 547 transitions. [2020-10-27 14:49:03,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-27 14:49:03,480 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 195 [2020-10-27 14:49:03,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:49:03,482 INFO L225 Difference]: With dead ends: 434 [2020-10-27 14:49:03,483 INFO L226 Difference]: Without dead ends: 421 [2020-10-27 14:49:03,483 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=409, Invalid=461, Unknown=0, NotChecked=0, Total=870 [2020-10-27 14:49:03,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 421 states. [2020-10-27 14:49:03,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 421 to 242. [2020-10-27 14:49:03,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 242 states. [2020-10-27 14:49:03,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 303 transitions. [2020-10-27 14:49:03,499 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 303 transitions. Word has length 195 [2020-10-27 14:49:03,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:49:03,499 INFO L481 AbstractCegarLoop]: Abstraction has 242 states and 303 transitions. [2020-10-27 14:49:03,500 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-27 14:49:03,500 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 303 transitions. [2020-10-27 14:49:03,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2020-10-27 14:49:03,502 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:49:03,502 INFO L422 BasicCegarLoop]: trace histogram [61, 61, 36, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:49:03,502 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-27 14:49:03,502 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:49:03,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:49:03,503 INFO L82 PathProgramCache]: Analyzing trace with hash -1403581616, now seen corresponding path program 27 times [2020-10-27 14:49:03,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:49:03,503 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1604871194] [2020-10-27 14:49:03,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:49:03,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:49:03,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:49:03,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:49:04,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:49:04,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:49:04,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:49:04,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:49:05,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:49:07,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:49:08,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:49:08,548 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:49:08,549 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 208 [2020-10-27 14:49:08,549 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-27 14:49:08,549 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-27 14:49:08,549 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:49:08,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 46 [2020-10-27 14:49:08,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 14:49:08,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 135 [2020-10-27 14:49:08,550 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:49:10,522 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:49:10,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:49:10,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:49:10,528 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:49:10,528 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:49:10,528 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:49:10,528 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:49:10,528 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:49:10,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:49:10,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:49:10,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:49:10,528 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:49:10,581 INFO L134 CoverageAnalysis]: Checked inductivity of 5551 backedges. 2233 proven. 2926 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2020-10-27 14:49:10,582 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1604871194] [2020-10-27 14:49:10,582 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:49:10,582 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2020-10-27 14:49:10,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776087443] [2020-10-27 14:49:10,583 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-10-27 14:49:10,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:49:10,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-10-27 14:49:10,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=2163, Unknown=0, NotChecked=0, Total=2256 [2020-10-27 14:49:10,585 INFO L87 Difference]: Start difference. First operand 242 states and 303 transitions. Second operand 48 states. [2020-10-27 14:49:20,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:49:20,536 INFO L93 Difference]: Finished difference Result 606 states and 769 transitions. [2020-10-27 14:49:20,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-27 14:49:20,537 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 198 [2020-10-27 14:49:20,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:49:20,540 INFO L225 Difference]: With dead ends: 606 [2020-10-27 14:49:20,540 INFO L226 Difference]: Without dead ends: 411 [2020-10-27 14:49:20,542 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=97, Invalid=2255, Unknown=0, NotChecked=0, Total=2352 [2020-10-27 14:49:20,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2020-10-27 14:49:20,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 230. [2020-10-27 14:49:20,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 230 states. [2020-10-27 14:49:20,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 256 transitions. [2020-10-27 14:49:20,557 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 256 transitions. Word has length 198 [2020-10-27 14:49:20,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:49:20,557 INFO L481 AbstractCegarLoop]: Abstraction has 230 states and 256 transitions. [2020-10-27 14:49:20,557 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-10-27 14:49:20,557 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 256 transitions. [2020-10-27 14:49:20,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2020-10-27 14:49:20,560 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:49:20,560 INFO L422 BasicCegarLoop]: trace histogram [70, 70, 45, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:49:20,560 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-27 14:49:20,560 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:49:20,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:49:20,561 INFO L82 PathProgramCache]: Analyzing trace with hash -1331441195, now seen corresponding path program 28 times [2020-10-27 14:49:20,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:49:20,561 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1485965394] [2020-10-27 14:49:20,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:49:20,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:49:20,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:49:20,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:49:20,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:49:21,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:49:21,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:49:22,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:49:23,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:49:23,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:49:23,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:49:23,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:49:25,611 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:49:25,611 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 235 [2020-10-27 14:49:25,611 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-27 14:49:25,611 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-27 14:49:25,611 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:49:25,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-27 14:49:25,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 145 [2020-10-27 14:49:25,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-27 14:49:25,612 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:49:26,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:49:26,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:49:26,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:49:26,233 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:49:26,233 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:49:26,234 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:49:26,234 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:49:26,234 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:49:26,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:49:26,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:49:26,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:49:26,234 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:49:26,285 INFO L134 CoverageAnalysis]: Checked inductivity of 7315 backedges. 3439 proven. 950 refuted. 0 times theorem prover too weak. 2926 trivial. 0 not checked. [2020-10-27 14:49:26,285 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1485965394] [2020-10-27 14:49:26,285 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:49:26,286 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-27 14:49:26,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172121885] [2020-10-27 14:49:26,286 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-27 14:49:26,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:49:26,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-27 14:49:26,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-27 14:49:26,287 INFO L87 Difference]: Start difference. First operand 230 states and 256 transitions. Second operand 30 states. [2020-10-27 14:49:27,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:49:27,259 INFO L93 Difference]: Finished difference Result 356 states and 412 transitions. [2020-10-27 14:49:27,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-27 14:49:27,260 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 225 [2020-10-27 14:49:27,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:49:27,262 INFO L225 Difference]: With dead ends: 356 [2020-10-27 14:49:27,262 INFO L226 Difference]: Without dead ends: 343 [2020-10-27 14:49:27,263 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=438, Invalid=492, Unknown=0, NotChecked=0, Total=930 [2020-10-27 14:49:27,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2020-10-27 14:49:27,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 233. [2020-10-27 14:49:27,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 233 states. [2020-10-27 14:49:27,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 260 transitions. [2020-10-27 14:49:27,274 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 260 transitions. Word has length 225 [2020-10-27 14:49:27,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:49:27,274 INFO L481 AbstractCegarLoop]: Abstraction has 233 states and 260 transitions. [2020-10-27 14:49:27,274 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-27 14:49:27,274 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 260 transitions. [2020-10-27 14:49:27,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2020-10-27 14:49:27,276 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:49:27,276 INFO L422 BasicCegarLoop]: trace histogram [71, 71, 45, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:49:27,276 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-27 14:49:27,276 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:49:27,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:49:27,277 INFO L82 PathProgramCache]: Analyzing trace with hash -1729487378, now seen corresponding path program 29 times [2020-10-27 14:49:27,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:49:27,277 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [192686383] [2020-10-27 14:49:27,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:49:27,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:49:27,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:49:27,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:49:28,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:49:28,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:49:28,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:49:28,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:49:29,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:49:29,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:49:32,322 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:49:32,322 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 238 [2020-10-27 14:49:32,322 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 14:49:32,323 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-27 14:49:32,323 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:49:32,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-27 14:49:32,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 145 [2020-10-27 14:49:32,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-27 14:49:32,323 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:49:33,014 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:49:33,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:49:33,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:49:33,021 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:49:33,021 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:49:33,021 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:49:33,021 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:49:33,021 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:49:33,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:49:33,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:49:33,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:49:33,021 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:49:33,054 INFO L134 CoverageAnalysis]: Checked inductivity of 7526 backedges. 3573 proven. 1027 refuted. 0 times theorem prover too weak. 2926 trivial. 0 not checked. [2020-10-27 14:49:33,054 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [192686383] [2020-10-27 14:49:33,054 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:49:33,054 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-27 14:49:33,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204439445] [2020-10-27 14:49:33,055 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-27 14:49:33,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:49:33,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-27 14:49:33,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-27 14:49:33,056 INFO L87 Difference]: Start difference. First operand 233 states and 260 transitions. Second operand 31 states. [2020-10-27 14:49:33,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:49:33,976 INFO L93 Difference]: Finished difference Result 363 states and 421 transitions. [2020-10-27 14:49:33,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-27 14:49:33,977 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 228 [2020-10-27 14:49:33,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:49:33,979 INFO L225 Difference]: With dead ends: 363 [2020-10-27 14:49:33,980 INFO L226 Difference]: Without dead ends: 350 [2020-10-27 14:49:33,982 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=468, Invalid=524, Unknown=0, NotChecked=0, Total=992 [2020-10-27 14:49:33,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2020-10-27 14:49:33,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 236. [2020-10-27 14:49:33,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 236 states. [2020-10-27 14:49:33,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 264 transitions. [2020-10-27 14:49:33,997 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 264 transitions. Word has length 228 [2020-10-27 14:49:33,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:49:33,998 INFO L481 AbstractCegarLoop]: Abstraction has 236 states and 264 transitions. [2020-10-27 14:49:33,998 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-27 14:49:33,998 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 264 transitions. [2020-10-27 14:49:33,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2020-10-27 14:49:33,999 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:49:33,999 INFO L422 BasicCegarLoop]: trace histogram [72, 72, 45, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:49:33,999 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-27 14:49:33,999 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:49:34,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:49:34,000 INFO L82 PathProgramCache]: Analyzing trace with hash -1518620875, now seen corresponding path program 30 times [2020-10-27 14:49:34,000 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:49:34,000 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1499395099] [2020-10-27 14:49:34,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:49:34,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:49:34,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:49:34,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:49:34,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:49:35,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:49:35,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:49:35,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:49:36,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:49:37,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:49:38,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:49:39,053 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:49:39,054 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 241 [2020-10-27 14:49:39,054 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-27 14:49:39,054 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-27 14:49:39,054 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:49:39,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-27 14:49:39,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 145 [2020-10-27 14:49:39,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 84 [2020-10-27 14:49:39,054 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:49:39,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:49:39,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:49:39,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:49:39,799 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:49:39,800 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:49:39,800 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:49:39,800 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:49:39,800 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:49:39,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:49:39,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:49:39,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:49:39,800 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:49:39,834 INFO L134 CoverageAnalysis]: Checked inductivity of 7740 backedges. 3707 proven. 1107 refuted. 0 times theorem prover too weak. 2926 trivial. 0 not checked. [2020-10-27 14:49:39,834 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1499395099] [2020-10-27 14:49:39,834 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:49:39,835 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-27 14:49:39,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172437871] [2020-10-27 14:49:39,835 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-27 14:49:39,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:49:39,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-27 14:49:39,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-27 14:49:39,837 INFO L87 Difference]: Start difference. First operand 236 states and 264 transitions. Second operand 32 states. [2020-10-27 14:49:40,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:49:40,794 INFO L93 Difference]: Finished difference Result 370 states and 430 transitions. [2020-10-27 14:49:40,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-27 14:49:40,801 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 231 [2020-10-27 14:49:40,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:49:40,803 INFO L225 Difference]: With dead ends: 370 [2020-10-27 14:49:40,803 INFO L226 Difference]: Without dead ends: 357 [2020-10-27 14:49:40,804 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=499, Invalid=557, Unknown=0, NotChecked=0, Total=1056 [2020-10-27 14:49:40,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2020-10-27 14:49:40,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 239. [2020-10-27 14:49:40,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 239 states. [2020-10-27 14:49:40,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 268 transitions. [2020-10-27 14:49:40,822 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 268 transitions. Word has length 231 [2020-10-27 14:49:40,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:49:40,823 INFO L481 AbstractCegarLoop]: Abstraction has 239 states and 268 transitions. [2020-10-27 14:49:40,823 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-27 14:49:40,823 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 268 transitions. [2020-10-27 14:49:40,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2020-10-27 14:49:40,824 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:49:40,824 INFO L422 BasicCegarLoop]: trace histogram [73, 73, 45, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:49:40,825 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-27 14:49:40,825 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:49:40,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:49:40,825 INFO L82 PathProgramCache]: Analyzing trace with hash 1163183246, now seen corresponding path program 31 times [2020-10-27 14:49:40,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:49:40,826 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2117073121] [2020-10-27 14:49:40,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:49:40,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:49:40,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:49:41,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:49:42,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:49:45,884 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:49:45,884 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 244 [2020-10-27 14:49:45,884 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:49:45,884 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-27 14:49:45,884 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:49:45,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 47 [2020-10-27 14:49:45,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 14:49:45,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 138 [2020-10-27 14:49:45,885 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:49:47,994 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:49:47,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:49:47,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:49:48,000 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:49:48,000 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:49:48,000 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:49:48,001 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:49:48,001 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:49:48,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:49:48,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:49:48,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:49:48,001 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:49:48,058 INFO L134 CoverageAnalysis]: Checked inductivity of 7957 backedges. 3790 proven. 3060 refuted. 0 times theorem prover too weak. 1107 trivial. 0 not checked. [2020-10-27 14:49:48,059 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2117073121] [2020-10-27 14:49:48,059 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:49:48,059 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2020-10-27 14:49:48,059 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153027724] [2020-10-27 14:49:48,060 INFO L461 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-10-27 14:49:48,060 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:49:48,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-10-27 14:49:48,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=2257, Unknown=0, NotChecked=0, Total=2352 [2020-10-27 14:49:48,061 INFO L87 Difference]: Start difference. First operand 239 states and 268 transitions. Second operand 49 states. [2020-10-27 14:49:58,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:49:58,579 INFO L93 Difference]: Finished difference Result 526 states and 631 transitions. [2020-10-27 14:49:58,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-10-27 14:49:58,580 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 234 [2020-10-27 14:49:58,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:49:58,583 INFO L225 Difference]: With dead ends: 526 [2020-10-27 14:49:58,583 INFO L226 Difference]: Without dead ends: 427 [2020-10-27 14:49:58,585 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=99, Invalid=2351, Unknown=0, NotChecked=0, Total=2450 [2020-10-27 14:49:58,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2020-10-27 14:49:58,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 242. [2020-10-27 14:49:58,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 242 states. [2020-10-27 14:49:58,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 271 transitions. [2020-10-27 14:49:58,597 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 271 transitions. Word has length 234 [2020-10-27 14:49:58,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:49:58,598 INFO L481 AbstractCegarLoop]: Abstraction has 242 states and 271 transitions. [2020-10-27 14:49:58,598 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-10-27 14:49:58,598 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 271 transitions. [2020-10-27 14:49:58,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2020-10-27 14:49:58,599 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:49:58,599 INFO L422 BasicCegarLoop]: trace histogram [74, 74, 46, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:49:58,599 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-27 14:49:58,599 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:49:58,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:49:58,600 INFO L82 PathProgramCache]: Analyzing trace with hash -1543273453, now seen corresponding path program 32 times [2020-10-27 14:49:58,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:49:58,600 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1766197823] [2020-10-27 14:49:58,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:49:58,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:49:58,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:49:58,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:50:00,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:50:00,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:50:00,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:50:00,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:50:00,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:50:00,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:50:00,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:50:00,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:50:00,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:50:01,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:50:01,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:50:01,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:50:01,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:50:01,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:50:01,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:50:01,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:50:01,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:50:01,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:50:02,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:50:02,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:50:02,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:50:02,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:50:03,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:50:03,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:50:03,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:50:03,653 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:50:03,653 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 247 [2020-10-27 14:50:03,654 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 27 [2020-10-27 14:50:03,654 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-27 14:50:03,654 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:50:03,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-27 14:50:03,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 148 [2020-10-27 14:50:03,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 87 [2020-10-27 14:50:03,654 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:50:04,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:50:04,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:50:04,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:50:04,426 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:50:04,426 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:50:04,426 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:50:04,426 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:50:04,426 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:50:04,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:50:04,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:50:04,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:50:04,426 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:50:04,457 INFO L134 CoverageAnalysis]: Checked inductivity of 8177 backedges. 3927 proven. 1190 refuted. 0 times theorem prover too weak. 3060 trivial. 0 not checked. [2020-10-27 14:50:04,458 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1766197823] [2020-10-27 14:50:04,458 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:50:04,458 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-27 14:50:04,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72559612] [2020-10-27 14:50:04,458 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-27 14:50:04,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:50:04,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-27 14:50:04,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-27 14:50:04,459 INFO L87 Difference]: Start difference. First operand 242 states and 271 transitions. Second operand 33 states. [2020-10-27 14:50:05,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:50:05,439 INFO L93 Difference]: Finished difference Result 380 states and 442 transitions. [2020-10-27 14:50:05,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-27 14:50:05,440 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 237 [2020-10-27 14:50:05,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:50:05,443 INFO L225 Difference]: With dead ends: 380 [2020-10-27 14:50:05,443 INFO L226 Difference]: Without dead ends: 367 [2020-10-27 14:50:05,444 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=531, Invalid=591, Unknown=0, NotChecked=0, Total=1122 [2020-10-27 14:50:05,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2020-10-27 14:50:05,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 245. [2020-10-27 14:50:05,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 245 states. [2020-10-27 14:50:05,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 275 transitions. [2020-10-27 14:50:05,454 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 275 transitions. Word has length 237 [2020-10-27 14:50:05,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:50:05,454 INFO L481 AbstractCegarLoop]: Abstraction has 245 states and 275 transitions. [2020-10-27 14:50:05,455 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-27 14:50:05,455 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 275 transitions. [2020-10-27 14:50:05,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2020-10-27 14:50:05,456 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:50:05,456 INFO L422 BasicCegarLoop]: trace histogram [75, 75, 46, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:50:05,456 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-27 14:50:05,456 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:50:05,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:50:05,457 INFO L82 PathProgramCache]: Analyzing trace with hash 1177639664, now seen corresponding path program 33 times [2020-10-27 14:50:05,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:50:05,457 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1160461168] [2020-10-27 14:50:05,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:50:05,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:50:05,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:50:05,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:50:09,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:50:09,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:50:09,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:50:09,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:50:09,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:50:09,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:50:09,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:50:09,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:50:10,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:50:10,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:50:10,513 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:50:10,514 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 250 [2020-10-27 14:50:10,514 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-27 14:50:10,514 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-27 14:50:10,514 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:50:10,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-27 14:50:10,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 148 [2020-10-27 14:50:10,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 90 [2020-10-27 14:50:10,514 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:50:11,370 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:50:11,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:50:11,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:50:11,374 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:50:11,374 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:50:11,375 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:50:11,375 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:50:11,375 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:50:11,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:50:11,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:50:11,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:50:11,375 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:50:11,408 INFO L134 CoverageAnalysis]: Checked inductivity of 8400 backedges. 4064 proven. 1276 refuted. 0 times theorem prover too weak. 3060 trivial. 0 not checked. [2020-10-27 14:50:11,408 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1160461168] [2020-10-27 14:50:11,408 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:50:11,408 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-27 14:50:11,408 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811150688] [2020-10-27 14:50:11,409 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-27 14:50:11,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:50:11,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-27 14:50:11,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-27 14:50:11,410 INFO L87 Difference]: Start difference. First operand 245 states and 275 transitions. Second operand 34 states. [2020-10-27 14:50:12,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:50:12,525 INFO L93 Difference]: Finished difference Result 387 states and 451 transitions. [2020-10-27 14:50:12,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-27 14:50:12,526 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 240 [2020-10-27 14:50:12,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:50:12,529 INFO L225 Difference]: With dead ends: 387 [2020-10-27 14:50:12,529 INFO L226 Difference]: Without dead ends: 374 [2020-10-27 14:50:12,530 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=564, Invalid=626, Unknown=0, NotChecked=0, Total=1190 [2020-10-27 14:50:12,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2020-10-27 14:50:12,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 248. [2020-10-27 14:50:12,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 248 states. [2020-10-27 14:50:12,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 279 transitions. [2020-10-27 14:50:12,540 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 279 transitions. Word has length 240 [2020-10-27 14:50:12,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:50:12,541 INFO L481 AbstractCegarLoop]: Abstraction has 248 states and 279 transitions. [2020-10-27 14:50:12,541 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-27 14:50:12,541 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 279 transitions. [2020-10-27 14:50:12,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2020-10-27 14:50:12,542 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:50:12,543 INFO L422 BasicCegarLoop]: trace histogram [76, 76, 46, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:50:12,543 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-27 14:50:12,543 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:50:12,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:50:12,543 INFO L82 PathProgramCache]: Analyzing trace with hash 982530803, now seen corresponding path program 34 times [2020-10-27 14:50:12,543 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:50:12,544 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1816348706] [2020-10-27 14:50:12,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:50:12,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:50:12,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:50:12,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:50:13,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:50:13,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:50:14,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:50:14,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:50:14,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:50:14,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:50:17,592 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:50:17,592 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 253 [2020-10-27 14:50:17,592 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 14:50:17,592 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-27 14:50:17,593 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:50:17,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-27 14:50:17,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 148 [2020-10-27 14:50:17,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 93 [2020-10-27 14:50:17,593 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:50:18,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:50:18,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:50:18,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:50:18,508 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:50:18,508 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:50:18,508 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:50:18,508 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:50:18,508 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:50:18,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:50:18,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:50:18,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:50:18,509 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:50:18,546 INFO L134 CoverageAnalysis]: Checked inductivity of 8626 backedges. 4201 proven. 1365 refuted. 0 times theorem prover too weak. 3060 trivial. 0 not checked. [2020-10-27 14:50:18,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1816348706] [2020-10-27 14:50:18,546 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:50:18,546 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-27 14:50:18,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630323974] [2020-10-27 14:50:18,547 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-27 14:50:18,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:50:18,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-27 14:50:18,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-27 14:50:18,548 INFO L87 Difference]: Start difference. First operand 248 states and 279 transitions. Second operand 35 states. [2020-10-27 14:50:19,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:50:19,861 INFO L93 Difference]: Finished difference Result 394 states and 460 transitions. [2020-10-27 14:50:19,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-27 14:50:19,862 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 243 [2020-10-27 14:50:19,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:50:19,865 INFO L225 Difference]: With dead ends: 394 [2020-10-27 14:50:19,865 INFO L226 Difference]: Without dead ends: 381 [2020-10-27 14:50:19,866 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=598, Invalid=662, Unknown=0, NotChecked=0, Total=1260 [2020-10-27 14:50:19,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2020-10-27 14:50:19,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 251. [2020-10-27 14:50:19,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 251 states. [2020-10-27 14:50:19,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 283 transitions. [2020-10-27 14:50:19,877 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 283 transitions. Word has length 243 [2020-10-27 14:50:19,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:50:19,877 INFO L481 AbstractCegarLoop]: Abstraction has 251 states and 283 transitions. [2020-10-27 14:50:19,877 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-27 14:50:19,878 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 283 transitions. [2020-10-27 14:50:19,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2020-10-27 14:50:19,879 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:50:19,879 INFO L422 BasicCegarLoop]: trace histogram [77, 77, 46, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:50:19,879 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-27 14:50:19,880 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:50:19,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:50:19,880 INFO L82 PathProgramCache]: Analyzing trace with hash -414795760, now seen corresponding path program 35 times [2020-10-27 14:50:19,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:50:19,880 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2048493502] [2020-10-27 14:50:19,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:50:19,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:50:19,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:50:20,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:50:20,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:50:20,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:50:21,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:50:21,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:50:21,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:50:21,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:50:21,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:50:21,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:50:21,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:50:21,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:50:21,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:50:22,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:50:22,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:50:22,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:50:22,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:50:22,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:50:24,952 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:50:24,952 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 256 [2020-10-27 14:50:24,952 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 18 [2020-10-27 14:50:24,952 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-27 14:50:24,953 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:50:24,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-27 14:50:24,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 148 [2020-10-27 14:50:24,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 96 [2020-10-27 14:50:24,953 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:50:25,888 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:50:25,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:50:25,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:50:25,893 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:50:25,893 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:50:25,894 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:50:25,894 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:50:25,894 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:50:25,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:50:25,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:50:25,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:50:25,894 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:50:25,929 INFO L134 CoverageAnalysis]: Checked inductivity of 8855 backedges. 4338 proven. 1457 refuted. 0 times theorem prover too weak. 3060 trivial. 0 not checked. [2020-10-27 14:50:25,930 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2048493502] [2020-10-27 14:50:25,930 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:50:25,930 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-27 14:50:25,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107309335] [2020-10-27 14:50:25,932 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-27 14:50:25,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:50:25,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-27 14:50:25,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-27 14:50:25,934 INFO L87 Difference]: Start difference. First operand 251 states and 283 transitions. Second operand 36 states. [2020-10-27 14:50:27,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:50:27,061 INFO L93 Difference]: Finished difference Result 401 states and 469 transitions. [2020-10-27 14:50:27,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-27 14:50:27,062 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 246 [2020-10-27 14:50:27,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:50:27,065 INFO L225 Difference]: With dead ends: 401 [2020-10-27 14:50:27,066 INFO L226 Difference]: Without dead ends: 388 [2020-10-27 14:50:27,067 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=633, Invalid=699, Unknown=0, NotChecked=0, Total=1332 [2020-10-27 14:50:27,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states. [2020-10-27 14:50:27,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 254. [2020-10-27 14:50:27,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 254 states. [2020-10-27 14:50:27,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 287 transitions. [2020-10-27 14:50:27,078 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 287 transitions. Word has length 246 [2020-10-27 14:50:27,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:50:27,078 INFO L481 AbstractCegarLoop]: Abstraction has 254 states and 287 transitions. [2020-10-27 14:50:27,078 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-27 14:50:27,078 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 287 transitions. [2020-10-27 14:50:27,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2020-10-27 14:50:27,080 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:50:27,080 INFO L422 BasicCegarLoop]: trace histogram [78, 78, 46, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:50:27,080 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-27 14:50:27,080 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:50:27,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:50:27,081 INFO L82 PathProgramCache]: Analyzing trace with hash -1347401261, now seen corresponding path program 36 times [2020-10-27 14:50:27,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:50:27,081 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [225172017] [2020-10-27 14:50:27,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:50:27,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:50:27,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:50:27,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:50:29,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:50:29,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:50:29,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:50:29,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:50:29,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:50:30,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:50:30,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking...